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LTF cross-correlation window update: 16->32 complex samples
This commit is contained in:
mmehari
parent
36c738fe98
commit
d2d5494f57
@ -4,24 +4,23 @@ module stage_mult
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input enable,
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input reset,
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input signed [15:0] X0,
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input signed [15:0] X1,
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input signed [15:0] X2,
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input signed [15:0] X3,
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input signed [15:0] X4,
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input signed [15:0] X5,
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input signed [15:0] X6,
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input signed [15:0] X7,
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input signed [31:0] X0,
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input signed [31:0] X1,
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input signed [31:0] X2,
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input signed [31:0] X3,
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input signed [31:0] X4,
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input signed [31:0] X5,
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input signed [31:0] X6,
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input signed [31:0] X7,
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input signed [15:0] Y0,
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input signed [15:0] Y1,
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input signed [15:0] Y2,
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input signed [15:0] Y3,
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input signed [15:0] Y4,
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input signed [15:0] Y5,
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input signed [15:0] Y6,
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input signed [15:0] Y7,
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input signed [31:0] Y0,
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input signed [31:0] Y1,
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input signed [31:0] Y2,
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input signed [31:0] Y3,
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input signed [31:0] Y4,
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input signed [31:0] Y5,
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input signed [31:0] Y6,
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input signed [31:0] Y7,
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input input_strobe,
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@ -29,6 +28,40 @@ module stage_mult
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output output_strobe
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);
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wire signed [15:0] X0_q = X0[31:16];
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wire signed [15:0] X0_i = X0[15:0];
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wire signed [15:0] X1_q = X1[31:16];
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wire signed [15:0] X1_i = X1[15:0];
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wire signed [15:0] X2_q = X2[31:16];
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wire signed [15:0] X2_i = X2[15:0];
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wire signed [15:0] X3_q = X3[31:16];
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wire signed [15:0] X3_i = X3[15:0];
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wire signed [15:0] X4_q = X4[31:16];
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wire signed [15:0] X4_i = X4[15:0];
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wire signed [15:0] X5_q = X5[31:16];
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wire signed [15:0] X5_i = X5[15:0];
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wire signed [15:0] X6_q = X6[31:16];
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wire signed [15:0] X6_i = X6[15:0];
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wire signed [15:0] X7_q = X7[31:16];
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wire signed [15:0] X7_i = X7[15:0];
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wire signed [15:0] Y0_q = Y0[31:16];
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wire signed [15:0] Y0_i = Y0[15:0];
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wire signed [15:0] Y1_q = Y1[31:16];
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wire signed [15:0] Y1_i = Y1[15:0];
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wire signed [15:0] Y2_q = Y2[31:16];
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wire signed [15:0] Y2_i = Y2[15:0];
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wire signed [15:0] Y3_q = Y3[31:16];
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wire signed [15:0] Y3_i = Y3[15:0];
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wire signed [15:0] Y4_q = Y4[31:16];
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wire signed [15:0] Y4_i = Y4[15:0];
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wire signed [15:0] Y5_q = Y5[31:16];
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wire signed [15:0] Y5_i = Y5[15:0];
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wire signed [15:0] Y6_q = Y6[31:16];
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wire signed [15:0] Y6_i = Y6[15:0];
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wire signed [15:0] Y7_q = Y7[31:16];
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wire signed [15:0] Y7_i = Y7[15:0];
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wire signed [31:0] prod_0_i;
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wire signed [31:0] prod_0_q;
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wire signed [31:0] prod_1_i;
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@ -37,52 +70,103 @@ wire signed [31:0] prod_2_i;
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wire signed [31:0] prod_2_q;
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wire signed [31:0] prod_3_i;
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wire signed [31:0] prod_3_q;
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wire signed [31:0] prod_4_i;
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wire signed [31:0] prod_4_q;
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wire signed [31:0] prod_5_i;
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wire signed [31:0] prod_5_q;
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wire signed [31:0] prod_6_i;
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wire signed [31:0] prod_6_q;
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wire signed [31:0] prod_7_i;
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wire signed [31:0] prod_7_q;
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complex_multiplier mult_inst (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X1,X0}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y1,Y0}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_0_q,prod_0_i})
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complex_multiplier mult_inst1 (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X0_i,X0_q}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y0_i,Y0_q}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_0_q,prod_0_i})
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);
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complex_multiplier mult_inst2 (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X3,X2}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y3,Y2}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_1_q,prod_1_i})
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X1_i,X1_q}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y1_i,Y1_q}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_1_q,prod_1_i})
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);
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complex_multiplier mult_inst3 (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X5,X4}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y5,Y4}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_2_q,prod_2_i})
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X2_i,X2_q}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y2_i,Y2_q}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_2_q,prod_2_i})
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);
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complex_multiplier mult_inst4 (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X7,X6}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y7,Y6}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_3_q,prod_3_i})
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X3_i,X3_q}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y3_i,Y3_q}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_3_q,prod_3_i})
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);
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complex_multiplier mult_inst5 (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X4_i,X4_q}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y4_i,Y4_q}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_4_q,prod_4_i})
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);
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complex_multiplier mult_inst6 (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X5_i,X5_q}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y5_i,Y5_q}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_5_q,prod_5_i})
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);
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complex_multiplier mult_inst7 (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X6_i,X6_q}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y6_i,Y6_q}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_6_q,prod_6_i})
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);
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complex_multiplier mult_inst8 (
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.aclk(clock),
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.s_axis_a_tvalid(input_strobe),
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.s_axis_a_tdata({X7_i,X7_q}),
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.s_axis_b_tvalid(input_strobe),
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.s_axis_b_tdata({Y7_i,Y7_q}),
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.m_axis_dout_tvalid(),
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.m_axis_dout_tdata({prod_7_q,prod_7_i})
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);
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reg signed [31:0] sum_i1;
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reg signed [31:0] sum_i2;
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reg signed [31:0] sum_i3;
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reg signed [31:0] sum_i4;
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reg signed [31:0] sum_q1;
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reg signed [31:0] sum_q2;
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reg signed [31:0] sum_q3;
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reg signed [31:0] sum_q4;
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delayT #(.DATA_WIDTH(1), .DELAY(5)) sum_delay_inst (
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.clock(clock),
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@ -97,16 +181,24 @@ always @(posedge clock) begin
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sum <= 0;
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sum_i1 <= 0;
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sum_i2 <= 0;
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sum_i3 <= 0;
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sum_i4 <= 0;
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sum_q1 <= 0;
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sum_q2 <= 0;
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sum_q3 <= 0;
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sum_q4 <= 0;
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end else if (enable) begin
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sum_i1 <= prod_0_i + prod_1_i;
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sum_i2 <= prod_2_i + prod_3_i;
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sum_i3 <= prod_4_i + prod_5_i;
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sum_i4 <= prod_6_i + prod_7_i;
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sum_q1 <= prod_0_q + prod_1_q;
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sum_q2 <= prod_2_q + prod_3_q;
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sum_q3 <= prod_4_q + prod_5_q;
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sum_q4 <= prod_6_q + prod_7_q;
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sum[63:32] <= sum_i1 + sum_i2;
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sum[31:0] <= sum_q1 + sum_q2;
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sum[63:32] <= sum_i1 + sum_i2 + sum_i3 + sum_i4;
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sum[31:0] <= sum_q1 + sum_q2 + sum_q3 + sum_q4;
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end
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end
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@ -123,40 +123,48 @@ complex_to_mag #(.DATA_WIDTH(32)) sum_mag_inst (
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reg [31:0] metric_max1;
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reg [(IN_BUF_LEN_SHIFT-1):0] addr1;
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reg [31:0] cross_corr_buf[0:15];
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reg [31:0] cross_corr_buf[0:31];
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reg [31:0] stage_X0;
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reg [31:0] stage_X1;
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reg [31:0] stage_X2;
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reg [31:0] stage_X3;
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reg [31:0] stage_X4;
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reg [31:0] stage_X5;
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reg [31:0] stage_X6;
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reg [31:0] stage_X7;
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reg [31:0] stage_Y0;
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reg [31:0] stage_Y1;
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reg [31:0] stage_Y2;
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reg [31:0] stage_Y3;
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reg [31:0] stage_Y4;
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reg [31:0] stage_Y5;
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reg [31:0] stage_Y6;
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reg [31:0] stage_Y7;
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stage_mult stage_mult_inst (
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.clock(clock),
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.enable(enable),
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.reset(reset),
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.X0(stage_X0[31:16]),
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.X1(stage_X0[15:0]),
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.X2(stage_X1[31:16]),
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.X3(stage_X1[15:0]),
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.X4(stage_X2[31:16]),
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.X5(stage_X2[15:0]),
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.X6(stage_X3[31:16]),
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.X7(stage_X3[15:0]),
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.X0(stage_X0),
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.X1(stage_X1),
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.X2(stage_X2),
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.X3(stage_X3),
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.X4(stage_X4),
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.X5(stage_X5),
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.X6(stage_X6),
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.X7(stage_X7),
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.Y0(stage_Y0[31:16]),
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.Y1(stage_Y0[15:0]),
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.Y2(stage_Y1[31:16]),
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.Y3(stage_Y1[15:0]),
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.Y4(stage_Y2[31:16]),
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.Y5(stage_Y2[15:0]),
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.Y6(stage_Y3[31:16]),
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.Y7(stage_Y3[15:0]),
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.Y0(stage_Y0),
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.Y1(stage_Y1),
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.Y2(stage_Y2),
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.Y3(stage_Y3),
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.Y4(stage_Y4),
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.Y5(stage_Y5),
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.Y6(stage_Y6),
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.Y7(stage_Y7),
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.input_strobe(mult_strobe),
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@ -287,7 +295,7 @@ integer i;
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integer j;
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always @(posedge clock) begin
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if (reset) begin
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for (j = 0; j < 16; j= j+1) begin
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for (j = 0; j < 32; j= j+1) begin
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cross_corr_buf[j] <= 0;
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end
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do_clear();
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@ -319,15 +327,15 @@ always @(posedge clock) begin
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addr1 <= in_raddr - 1;
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end
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if (num_sample >= 64) begin
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if (num_sample >= 88) begin
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long_preamble_detected <= 1;
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num_sample <= 0;
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mult_strobe <= 0;
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sum_stb <= 0;
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// offset it by the length of cross correlation buffer
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// size
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in_raddr <= addr1 - 16;
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num_input_consumed <= addr1 - 16;
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in_raddr <= addr1 - 32;
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num_input_consumed <= addr1 - 32;
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in_offset <= 0;
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num_ofdm_symbol <= 0;
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phase_correction <= 0;
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@ -348,7 +356,7 @@ always @(posedge clock) begin
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long_preamble_detected <= 0;
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end
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if (~fft_loading && num_input_avail > 64) begin
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if (~fft_loading && num_input_avail > 88) begin
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fft_start <= 1;
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in_offset <= 0;
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end
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@ -424,8 +432,8 @@ integer do_mult_i;
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task do_mult; begin
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// cross correlation of the first 16 samples of LTS
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if (sample_in_strobe) begin
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cross_corr_buf[15] <= sample_in;
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for (do_mult_i = 0; do_mult_i < 15; do_mult_i = do_mult_i+1) begin
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cross_corr_buf[31] <= sample_in;
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for (do_mult_i = 0; do_mult_i < 31; do_mult_i = do_mult_i+1) begin
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cross_corr_buf[do_mult_i] <= cross_corr_buf[do_mult_i+1];
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end
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@ -438,66 +446,82 @@ task do_mult; begin
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stage_X1 <= cross_corr_buf[2];
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stage_X2 <= cross_corr_buf[3];
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stage_X3 <= cross_corr_buf[4];
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stage_X4 <= cross_corr_buf[5];
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stage_X5 <= cross_corr_buf[6];
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stage_X6 <= cross_corr_buf[7];
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stage_X7 <= cross_corr_buf[8];
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stage_Y0[31:16] <= 156;
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stage_Y0[15:0] <= 0;
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stage_Y1[31:16] <= -5;
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stage_Y1[15:0] <= 120;
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stage_Y2[31:16] <= 40;
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stage_Y2[15:0] <= 111;
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stage_Y3[31:16] <= 97;
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stage_Y3[15:0] <= -83;
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stage_Y0 <= { 16'd156, 16'd0};
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stage_Y1 <= {-16'd5, 16'd120};
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stage_Y2 <= { 16'd40, 16'd111};
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stage_Y3 <= { 16'd97, -16'd83};
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stage_Y4 <= { 16'd21, -16'd28};
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stage_Y5 <= { 16'd60, 16'd88};
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stage_Y6 <= {-16'd115, 16'd55};
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stage_Y7 <= {-16'd38, 16'd106};
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mult_strobe <= 1;
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mult_stage <= 1;
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end
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if (mult_stage == 1) begin
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stage_X0 <= cross_corr_buf[4];
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stage_X1 <= cross_corr_buf[5];
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stage_X2 <= cross_corr_buf[6];
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stage_X3 <= cross_corr_buf[7];
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stage_Y0[31:16] <= 21;
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stage_Y0[15:0] <= -28;
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stage_Y1[31:16] <= 60;
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stage_Y1[15:0] <= 88;
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stage_Y2[31:16] <= -115;
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||||
stage_Y2[15:0] <= 55;
|
||||
stage_Y3[31:16] <= -38;
|
||||
stage_Y3[15:0] <= 106;
|
||||
|
||||
mult_stage <= 2;
|
||||
end else if (mult_stage == 2) begin
|
||||
stage_X0 <= cross_corr_buf[8];
|
||||
stage_X1 <= cross_corr_buf[9];
|
||||
stage_X2 <= cross_corr_buf[10];
|
||||
stage_X3 <= cross_corr_buf[11];
|
||||
stage_X4 <= cross_corr_buf[12];
|
||||
stage_X5 <= cross_corr_buf[13];
|
||||
stage_X6 <= cross_corr_buf[14];
|
||||
stage_X7 <= cross_corr_buf[15];
|
||||
|
||||
stage_Y0[31:16] <= 98;
|
||||
stage_Y0[15:0] <= 26;
|
||||
stage_Y1[31:16] <= 53;
|
||||
stage_Y1[15:0] <= -4;
|
||||
stage_Y2[31:16] <= 1;
|
||||
stage_Y2[15:0] <= 115;
|
||||
stage_Y3[31:16] <= -137;
|
||||
stage_Y3[15:0] <= 47;
|
||||
stage_Y0 <= { 16'd98, 16'd26};
|
||||
stage_Y1 <= { 16'd53, -16'd4};
|
||||
stage_Y2 <= { 16'd1, 16'd115};
|
||||
stage_Y3 <= {-16'd137, 16'd47};
|
||||
stage_Y4 <= { 16'd24, 16'd59};
|
||||
stage_Y5 <= { 16'd59, 16'd15};
|
||||
stage_Y6 <= {-16'd22, -16'd161};
|
||||
stage_Y7 <= { 16'd119, 16'd4};
|
||||
|
||||
mult_stage <= 2;
|
||||
end else if (mult_stage == 2) begin
|
||||
stage_X0 <= cross_corr_buf[16];
|
||||
stage_X1 <= cross_corr_buf[17];
|
||||
stage_X2 <= cross_corr_buf[18];
|
||||
stage_X3 <= cross_corr_buf[19];
|
||||
stage_X4 <= cross_corr_buf[20];
|
||||
stage_X5 <= cross_corr_buf[21];
|
||||
stage_X6 <= cross_corr_buf[22];
|
||||
stage_X7 <= cross_corr_buf[23];
|
||||
|
||||
stage_Y0 <= { 16'd62, 16'd62};
|
||||
stage_Y1 <= { 16'd37, -16'd98};
|
||||
stage_Y2 <= {-16'd57, -16'd39};
|
||||
stage_Y3 <= {-16'd131, -16'd65};
|
||||
stage_Y4 <= { 16'd82, -16'd92};
|
||||
stage_Y5 <= { 16'd70, -16'd14};
|
||||
stage_Y6 <= {-16'd60, -16'd81};
|
||||
stage_Y7 <= {-16'd56, 16'd22};
|
||||
|
||||
mult_stage <= 3;
|
||||
end else if (mult_stage == 3) begin
|
||||
stage_X0 <= cross_corr_buf[12];
|
||||
stage_X1 <= cross_corr_buf[13];
|
||||
stage_X2 <= cross_corr_buf[14];
|
||||
stage_X3 <= cross_corr_buf[15];
|
||||
stage_X0 <= cross_corr_buf[24];
|
||||
stage_X1 <= cross_corr_buf[25];
|
||||
stage_X2 <= cross_corr_buf[26];
|
||||
stage_X3 <= cross_corr_buf[27];
|
||||
stage_X4 <= cross_corr_buf[28];
|
||||
stage_X5 <= cross_corr_buf[29];
|
||||
stage_X6 <= cross_corr_buf[30];
|
||||
stage_X7 <= cross_corr_buf[31];
|
||||
|
||||
stage_Y0[31:16] <= 24;
|
||||
stage_Y0[15:0] <= 59;
|
||||
stage_Y1[31:16] <= 59;
|
||||
stage_Y1[15:0] <= 15;
|
||||
stage_Y2[31:16] <= -22;
|
||||
stage_Y2[15:0] <= -161;
|
||||
stage_Y3[31:16] <= 119;
|
||||
stage_Y3[15:0] <= 4;
|
||||
stage_Y0 <= {-16'd35, 16'd151};
|
||||
stage_Y1 <= {-16'd122, 16'd17};
|
||||
stage_Y2 <= {-16'd127, 16'd21};
|
||||
stage_Y3 <= { 16'd75, 16'd74};
|
||||
stage_Y4 <= {-16'd3, -16'd54};
|
||||
stage_Y5 <= {-16'd92, -16'd115};
|
||||
stage_Y6 <= { 16'd92, -16'd106};
|
||||
stage_Y7 <= { 16'd12, -16'd98};
|
||||
|
||||
mult_stage <= 4;
|
||||
end else if (mult_stage == 4) begin
|
||||
@ -561,11 +585,19 @@ task do_clear; begin
|
||||
stage_X1 <= 0;
|
||||
stage_X2 <= 0;
|
||||
stage_X3 <= 0;
|
||||
stage_X4 <= 0;
|
||||
stage_X5 <= 0;
|
||||
stage_X6 <= 0;
|
||||
stage_X7 <= 0;
|
||||
|
||||
stage_Y0 <= 0;
|
||||
stage_Y1 <= 0;
|
||||
stage_Y2 <= 0;
|
||||
stage_Y3 <= 0;
|
||||
stage_Y4 <= 0;
|
||||
stage_Y5 <= 0;
|
||||
stage_Y6 <= 0;
|
||||
stage_Y7 <= 0;
|
||||
end
|
||||
endtask
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user