使用Verilog语言,完成极化码的编码,并通过高斯信道模块(要求能改变其噪声功率大小)和SC译码模块,并给出testbench。(要求给出八位编码)只给出代码
时间: 2024-04-30 10:18:09 浏览: 9
抱歉,我无法提供完整的代码,但是我可以给出一些参考:
极化码编码:
```
module polar_encoder(input [7:0] data_in, output [7:0] data_out);
//定义输入输出端口
reg [7:0] u[0:7], v[0:7];
integer i, j, k;
//定义变量
always @(*) begin
u[0] = data_in; //输入数据赋值
for (i=0; i<7; i=i+1) begin
for (j=0; j<2**i; j=j+1) begin
k = j * 2**7 / 2**(i+1);
v[j+k] = u[i] ^ u[i+k];
end
u[i+1] = v[2**i:2**(i+1)-1];
end
data_out = u[7]; //输出编码数据
end
endmodule
```
高斯信道模块:
```
module gaussian_channel(input [7:0] data_in, input noise_power, output [7:0] data_out);
//定义输入输出端口
reg [7:0] noise;
real r1, r2, g, n;
integer i;
//定义变量
always @(*) begin
for (i=0; i<8; i=i+1) begin
r1 = $random;
r2 = $random;
g = sqrt(-2 * log(r1)) * cos(2 * $pi * r2);
n = noise_power * g;
noise[i] = $signed(n); //生成高斯噪声
end
data_out = data_in + noise; //加噪声
end
endmodule
```
SC译码模块:
```
module sc_decoder(input [7:0] y, output [7:0] x);
//定义输入输出端口
reg [7:0] llr[0:7], app[0:7];
integer i, j, k;
//定义变量
always @(*) begin
llr[0] = y; //接收数据赋值
for (i=0; i<7; i=i+1) begin
for (j=0; j<2**i; j=j+1) begin
k = j * 2**7 / 2**(i+1);
app[j+k] = llr[i] + llr[i+k];
end
for (j=0; j<2**i; j=j+1) begin
k = j * 2**7 / 2**(i+1);
if (app[j+k] < 0) begin
llr[i+1+k] = -1 * app[j+k];
end else begin
llr[i+1+k] = app[j+k];
end
end
end
for (i=0; i<8; i=i+1) begin
if (llr[7][i] < 0) begin
x[i] = 1;
end else begin
x[i] = 0;
end
end
end
endmodule
```
testbench:
```
module testbench;
reg [7:0] data_in;
reg noise_power;
wire [7:0] data_out1, data_out2;
integer i;
//定义变量
polar_encoder pe(.data_in(data_in), .data_out(data_out1)); //实例化极化码编码模块
gaussian_channel gc(.data_in(data_out1), .noise_power(noise_power), .data_out(data_out2)); //实例化高斯信道模块
sc_decoder sd(.y(data_out2), .x(data_in)); //实例化SC译码模块
initial begin
$dumpfile("dump.vcd"); //设置波形文件
$dumpvars(0, testbench); //输出波形
noise_power = 1; //设置噪声功率
for (i=0; i<256; i=i+1) begin
data_in = $random; //生成随机数据
#1; //延迟一个时钟周期
end
$finish; //结束仿真
end
endmodule
```