卷积编译码的fpga实现的代码
时间: 2023-12-08 14:05:20 浏览: 45
以下是一个卷积编码器和解码器的FPGA实现代码,供您参考:
卷积编码器:
```
module conv_encoder(clk, rst, data_in, data_out);
// 输入和输出端口
input clk, rst;
input [7:0] data_in;
output reg [7:0] data_out;
// 状态机和寄存器
reg [2:0] state;
reg [7:0] shift_reg;
reg [7:0] output_reg;
// 多项式系数
parameter poly1 = 8'h4F;
parameter poly2 = 8'h6D;
// 初始化
initial begin
state = 3'b000;
shift_reg = 8'b00000000;
output_reg = 8'b00000000;
data_out = 8'b00000000;
end
// 状态转移
always @(posedge clk) begin
if (rst) begin
state <= 3'b000;
shift_reg <= 8'b00000000;
output_reg <= 8'b00000000;
data_out <= 8'b00000000;
end else begin
case (state)
3'b000: begin
shift_reg <= {data_in, shift_reg[7:1]};
output_reg <= 8'b00000000;
state <= 3'b001;
end
3'b001: begin
output_reg <= shift_reg & poly1;
shift_reg <= {shift_reg[7:1], output_reg[0]};
state <= 3'b010;
end
3'b010: begin
output_reg <= shift_reg & poly2;
shift_reg <= {shift_reg[7:1], output_reg[0]};
state <= 3'b000;
end
default: state <= 3'b000;
endcase
end
end
// 输出
always @(posedge clk) begin
if (rst) begin
data_out <= 8'b00000000;
end else begin
case (state)
3'b000: data_out <= output_reg;
default: data_out <= 8'b00000000;
endcase
end
end
endmodule
```
卷积解码器:
```
module conv_decoder(clk, rst, data_in, data_out);
// 输入和输出端口
input clk, rst;
input [7:0] data_in;
output reg [7:0] data_out;
// 状态机和寄存器
reg [2:0] state;
reg [7:0] shift_reg;
reg [7:0] output_reg;
// 多项式系数
parameter poly1 = 8'h79;
parameter poly2 = 8'h5B;
// 初始化
initial begin
state = 3'b000;
shift_reg = 8'b00000000;
output_reg = 8'b00000000;
data_out = 8'b00000000;
end
// 状态转移
always @(posedge clk) begin
if (rst) begin
state <= 3'b000;
shift_reg <= 8'b00000000;
output_reg <= 8'b00000000;
data_out <= 8'b00000000;
end else begin
case (state)
3'b000: begin
shift_reg <= {data_in, shift_reg[7:1]};
output_reg <= 8'b00000000;
state <= 3'b001;
end
3'b001: begin
output_reg <= shift_reg & poly1;
shift_reg <= {shift_reg[7:1], output_reg[0]};
state <= 3'b010;
end
3'b010: begin
output_reg <= shift_reg & poly2;
shift_reg <= {shift_reg[7:1], output_reg[0]};
state <= 3'b000;
end
default: state <= 3'b000;
endcase
end
end
// 输出
always @(posedge clk) begin
if (rst) begin
data_out <= 8'b00000000;
end else begin
case (state)
3'b001: data_out <= output_reg[7];
3'b010: data_out <= {data_out[6:0], output_reg[7]};
3'b000: data_out <= {data_out[6:0], output_reg[7]};
default: data_out <= 8'b00000000;
endcase
end
end
endmodule
```
需要注意的是,这只是一个简单的卷积编码器和解码器的实现,实际应用中可能需要根据具体的需求进行修改和优化。
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