水下通信中单边带调制电路的设计与实现

摘要

针对水下通信载波频率很低的特点,设计相应的载频移相网络,低频宽带移相网络和相乘器电路实现单边带调制,通过Multisim 10对电路进行仿真.通过对实际电路进行测试,电路的边带抑制比可达到34 dB,满足水下通信系统的要求,为低载频段用移相法实现单边带调制技术的实际应用提供了参考.%On the basis of the carrier has a low frequency in underwater communication, carrier phase-shift network, low frequency wide band phase-shift network and multiplier circuit were desinged to realize the single side-band(SSB) modulation. The circuits were simulatied in Multisim 10. Through testing the actual circuits, sideband suppression ratio obtains 34 dB which can satisfy the underwater communication system. It will be stated referrence on actual amplication for SSB modulation with low carrier frequency using phase-shift methord.