直扩系统通过用待传输的信息信号与高速率的为噪声码波形相乘后,直接控制载波信 号的某个参量,达到扩展传输信号带宽的目的。-By multiplying the information signal and the high speed rate of the signal to be transmitted, the system can directly control a parameter of the carrier signal, and achieve the purpose of extending the bandwidth of the transmission signal.