msk调制解调vhdl仿真代码

以下是一份简单的基于 FPGA 的 MSK 调制解调 VHDL 仿真代码，可以供您参考：

library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.std_logic_arith.all;
use IEEE.std_logic_unsigned.all;

entity msk_mod_demod is
    Port (clk : in  std_logic;
          reset : in  std_logic;
          data_in : in  std_logic_vector(7 downto 0);
          data_out : out std_logic_vector(7 downto 0));
end msk_mod_demod;

architecture Behavioral of msk_mod_demod is
    signal msk_carrier : std_logic;
    signal msk_mod : std_logic;
    signal msk_demod : std_logic;
    signal phase_accum : std_logic_vector(7 downto 0);
    signal phase_accum_next : std_logic_vector(7 downto 0);
begin
    process (clk, reset)
    begin
        if (reset = '1') then
            phase_accum <= "00000000";
            data_out <= "00000000";
        elsif rising_edge(clk) then
            -- MSK carrier generation
            msk_carrier <= not(msk_mod) xor not(phase_accum(7));
            
            -- MSK modulation
            msk_mod <= msk_carrier xor data_in(0);
            
            -- Phase accumulator
            phase_accum_next <= phase_accum + '1';
            if (msk_mod = '1') then
                phase_accum_next(0) <= not(phase_accum(0));
            end if;
            phase_accum <= phase_accum_next;
            
            -- MSK demodulation
            msk_demod <= msk_carrier xor not(phase_accum(7));
            data_out <= data_in;
            data_out(0) <= msk_demod xor msk_mod;
        end if;
    end process;
end Behavioral;

请注意，这只是一个简单的示例代码，仅供参考。如果您需要更复杂的代码，请参考相关的文献或咨询专业的 FPGA 工程师。