用VHDL语言实现了DES加密算法，其中包含了测试程序，能够进行仿真。-Using VHDL language implementation of the DES encryption algorithm, which contains the test procedures can be simulated.

ASK调制VHDL程序及仿真，功能：基于VHDL硬件描述语言，对基带信号进行ASK振幅调制(ASK modulation VHDL program and simulation, function: Based on the VHDL hardware descr iption language, the baseband signal is ASK amplitude modulation)

FSK调制与解调VHDL程序及仿真，功能：基于VHDL硬件描述语言，对基带信号进行FSK调制(FSK modulation and demodulation VHDL program and simulation, function: Based on the VHDL hardware descr iption language, the baseband signal is modulated by FSK)