Straight expands in the communications system in, the wide frequency is (PN) carries on through the false noise sequence to the transmission information data modulates realizes.

• 直接序列扩频通信可以有效地抵抗来自信道中的窄带干扰。在一个直扩通信系统中,扩频是通过伪噪声序列(PN)对发送的信息数据进行调制来实现的。