单边带信号的分析  

Analysis on Single Side-band

作　　者：刘凌云[1] 弓美桃[1] 

机构地区：[1]集宁师范学院,内蒙古集宁012000

出　　处：《通信技术》2013年第4期128-129,132,共3页Communications Technology

摘　　要：单边带信号调制是在双边带信号的基础上抑制掉一个边带的调制方式。双边带信号含有上下两个边带,两个边带完全对称,并且含有相同的信息。两个边带所携带的信息相同,完全可以用一个边带来传输全部消息。因而单边带信号即是把其中的一个边带抑制掉,仅传输其中的一个边带的调制方式,它节省了载波功率,调制效率也得以提高。它的带宽是双边带带宽的一半,频率利用率高。单边带信号解调采用相干解调法。这里对单边带信号的实现和解调进行了验证分析。Single side-band modulation is a modulation method which, based on double side-band signal, suppresses one side-band. Double side-band signal contains upper and lower side-bands, and these two side-bands are completely symmetrical and carry identical information. And for all the information could be transferred by one side-band, so the single side-band signal modulation method could save the carrier power, improve the modulation efficiency, and again for its bandwidth is only half the bandwidth of double side-band, the frequency utilization is enhanced. Meanwhile the coherent demodulation method is adopted for demodulation of single side-band signal. The implementation and demodulation of single side-band signal is analyzed and verified, and these analysis and verfication are described in detail in this paper.

关 键 词：单边带 载波 相干解调 

分 类 号：TN91[电子电信—通信与信息系统]