摘要
偏移四相相移键控(OQPSK)是一种适用于在限带非线性信道中使用的高效恒包络数字调制技术。在非协作通信中,针对OQPSK信号的盲解调面临位定时提取算法受相位偏移敏感的特性,以及估计参数误差大的问题,采用了位定时与载波相位联合同步的算法实现了OQPSK信号的相干解调,解决了这些问题,仿真结果证明此算法的性能非常好,与理论值非常接近。
The offset quadrature phase-shift-keying（OQPSK） is an effective digital constant envelope modulation for band-limited nonlinear channel. In non-cooperative communication,OQPSK demodulation faces the problem of mutual effect between timing and carrier phase and frequency,as well as serious error of parameter estimating.The paper suggests an associated synchronization of timing and carrier phase and frequency,which solves the problem.The simulation results also prove the good performance of this method,which is very close to the theoretical value.
出处
《无线电通信技术》
2011年第4期50-52,共3页
Radio Communications Technology
