Carrierless modulation using bandlimited pseudo-noise signals and code hopping 这是一个水下信号传输的模拟，用于snr很低的情况（-30db），利用m-sequences去code信号。可用于军用环境（不易被探测）和水下信道很恶劣的环境（snr很低）-Carrierless modulation using bandlimited pseudo-noise signals and code hopping

时变信道仿真，适合水下缓慢时变信道，处理有些慢-Time-varying channel simulation code for simulation of underwater want, when you change the channel processing speed is somewhat slow

为水下信道估计代码，对新手非常具有参考价值(For underwater channel estimation code, it is of great reference value to the novice.)

传输ofdm数据，采用了简单的多径信道，实现水下通信，整体程序还可以，可以参考参考(In order to transmit OFDM data, a simple multi-path channel is used to realize underwater communication. The overall program can also be used for reference)