无线电工程Issue(4)：54-57,4.
单音干扰对QPSK解调性能影响分析
Analysis on Tone Interference Effects on QPSK Demodulation Performance
摘要
Abstract
The QPSK modulation technology has such features as ideal bit error rate (BER),higher spectrum efficiency,etc.The spurious signal may be generated by AD/DA,low-noise amplifiers,frequency synthesizers,and mixers,which affects the QPSK perform-ance.In the application conditions,some of the spurs are expected to be relatively narrowband signals and as such may be modeled as tone interference.Based on analysis the spur magnitude,frequency and phase effect on QPSK constellation diagram,the spur offset in frequency from the center frequency of QPSK signal,false lock of receiver onto the spur,adversely affects bit error rate performance.The simulations results show that the addition of convolutional coding can effectively suppress the spurious signals and improve the BER per-formance.In the simulation,the applicable condition of convolutional coding in the improvement of BER performance is studies.关键词
QPSK/杂散/单音干扰/星座图/卷积编码Key words
QPSK/spur/tone interference/constellation diagram/convolutional code分类
信息技术与安全科学引用本文复制引用
杨豪,颜青,刘会来..单音干扰对QPSK解调性能影响分析[J].无线电工程,2014,(4):54-57,4.基金项目
国家部委基金资助项目。 （）
