MSK调制Verilog程序设计
时间: 2023-11-08 09:43:54 浏览: 121
以下是一个简单的MSK调制Verilog程序设计示例:
module msk_mod(input clk, input bit_data, input bit_clk, output real out_i, output real out_q);
parameter freq_carrier = 10e6; //载波频率
parameter freq_symbol = 100e3; //符号频率
parameter bit_rate = 10e3; //比特率
parameter pi = 3.14159265358979323846;
real phase_i = 0.0;
real phase_q = 0.0;
real phase_carrier = 0.0;
real t = 0.0;
real dt = 1.0/(freq_carrier*10);
real omega_carrier = 2*pi*freq_carrier;
real omega_symbol = 2*pi*freq_symbol;
real omega_deviation = pi/bit_rate;
real bit_time = 1.0/bit_rate;
real amplitude = 1.0;
always @(posedge clk) begin
if (bit_clk) begin
phase_i = phase_i + omega_carrier*(t - dt/2) + omega_deviation*sin(omega_symbol*t);
phase_q = phase_q + omega_carrier*(t - dt/2) + omega_deviation*cos(omega_symbol*t);
t = t + dt;
if (bit_data) begin
out_i = amplitude*sin(phase_i);
out_q = amplitude*sin(phase_q);
end
else begin
out_i = amplitude*cos(phase_i);
out_q = amplitude*cos(phase_q);
end
end
end
endmodule
在这个示例中,我们使用always块来处理时钟事件,以及一个bit_clk信号来指示何时发送下一个比特。
我们还定义了一些常量,如载波频率,符号频率,比特率,π等。
在always块中,我们使用相位累积器来计算I和Q分量的相位,并使用正弦和余弦函数计算它们的值。我们还使用bit_data信号来决定是使用sin还是cos函数。
最后,我们将计算出的I和Q分量输出到out_i和out_q端口上。
请注意,这只是一个简单的示例,实际的MSK调制器可能需要更多的功能和调整,以适应具体的应用需求。
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