quartus2输出msk调制解调的可仿真代码

以下是一个简单的基于Quartus II的MSK调制解调器仿真代码：

module msk_mod_demod(
    input clk,
    input rst,
    input [7:0] data_in,
    output reg ms_out
);

// Modulation parameters
parameter Fc = 10e6;   // Carrier frequency
parameter Fs = 50e6;   // Sampling frequency
parameter T = 1/Fs;    // Sampling period
parameter baud = 100e3;// Bit rate
parameter Tb = 1/baud; // Bit duration
parameter Bt = 0.5;    // BT product (Gaussian filter bandwidth)
parameter h_len = 11;  // Gaussian filter length

// Modulation variables
reg [31:0] phi_acc;    // Phase accumulator
reg [31:0] phi_last;   // Last phase value
reg [31:0] phi_diff;   // Phase difference
reg [31:0] mod_out;    // Modulated output
reg [h_len-1:0] h;     // Gaussian filter coefficients
reg [h_len-1:0] h_last; // Last Gaussian filter coefficients
reg [31:0] s_in;       // Input shift register
reg [31:0] s_out;      // Output shift register
reg [31:0] s_last;     // Last output shift register
reg [h_len-1:0] s_tap;  // Gaussian filter tap
reg [31:0] demod_out;  // Demodulated output

// Modulation constants
localparam phi_max = 2**32 - 1;  // Maximum phase value
localparam phi_inc = round(Fc*T*2**32);  // Phase increment
localparam phi_wrap = round(Fs*T*2**32); // Phase wrap-around threshold
localparam h_norm = $floor((1<<(h_len-1))*exp(-Bt*Bt/(2*Tb*Tb))/sqrt(2*$pi*Bt*Bt/Tb)); // Gaussian filter normalization factor

// Modulation initialization
initial begin
    phi_acc <= 0;
    phi_last <= 0;
    phi_diff <= 0;
    mod_out <= 0;
    h <= {32{1'h0}};
    h_last <= h;
    s_in <= 0;
    s_out <= 0;
    s_last <= s_out;
    s_tap <= h;
    demod_out <= 0;
end

// Modulation
always @(posedge clk) begin
    if (rst) begin
        phi_acc <= 0;
        phi_last <= 0;
        phi_diff <= 0;
        mod_out <= 0;
        h <= {32{1'h0}};
        h_last <= h;
        s_in <= 0;
        s_out <= 0;
        s_last <= s_out;
        s_tap <= h;
    end else begin
        phi_last <= phi_acc;
        phi_acc <= phi_acc + phi_inc;
        if (phi_acc >= phi_wrap) phi_acc <= phi_acc - phi_wrap;
        phi_diff <= phi_acc - phi_last;
        mod_out <= $signed(data_in) * $sin(2*$pi*Fc*T*phi_diff);
        s_in <= {s_in[31:1], mod_out};
        s_out <= s_in * s_tap;
        s_last <= s_out;
        ms_out <= $signed(s_out[31]);
    end
end

// Gaussian filter
always @(posedge clk) begin
    if (rst) begin
        h <= {32{1'h0}};
        h_last <= h;
        s_tap <= h;
    end else begin
        h_last <= h;
        for (int i = 0; i < h_len; i = i + 1) begin
            if (i == 0) h[i] <= $signed(s_last[31]);
            else h[i] <= h_last[i-1];
        end
        s_tap <= h;
    end
end

// Demodulation
always @(posedge clk) begin
    if (rst) begin
        s_out <= 0;
        s_last <= s_out;
        demod_out <= 0;
    end else begin
        s_last <= s_out;
        demod_out <= $signed(s_out[31]) * $sin(2*$pi*Fc*T*phi_diff);
    end
end

endmodule

这个代码实现了一个基于高斯滤波的MSK调制解调器，可以通过Quartus II进行仿真。请注意，代码中的参数和变量设置是为了简单起见，并且可能需要根据具体应用进行修改。