Because of limited frequency band of channel, spread spectrum and MFSK modulations can not resolve that high speed transmission is in contradiction with limited frequency band.

当进行高速水下通信时，由于水下信道的频带有限，扩频和MFSK调制方式无法解决高速率信息传输和可利用信道频带窄的矛盾。

youdao

The system realization for the transmission of multiplexed testing signals using spread spectrum technology based on DSP is discussed. The circuit system is devised.

分析了多路测量信号扩频传输系统的DSP系统实现的整体方案，并实现电路的设计。

youdao

FSK-SS communication system has higher transmission efficiency as compared with direct series spread spectrum (DS-SS) communication system.

与通常的直接序列扩颗通信方式(DS - SS)相比，移频键控多值传送扩颗通信方式(FSK - SS)具有传输效率高的特点。

youdao

He digs like a dog to learn his subject, particularly if the subject is narrow and peculiar, such as opto-electronic switches, P-N junctions or a hailstorm's effect on spread spectrum wireless video transmission.

FORBES: Digital Rules