论文部分内容阅读
传统RAKE接收机(CLRAKE)由于不同路径载波之间存在无法准确估计的相位差,将导致多径信号的功率利用率大幅下降.针对这一缺陷,提出一种在载波上实现多径分离,并分别对多径信号实现载波相干解调的新型相干RAKE接收机(CORAKE).该CORAKE对各径信号的接收都是相干解调,三径本地载波分别与相对应的三径接收信号载波相位差均为0,消除了各径载波间的相位差对接收性能的影响.仿真结果表明,CORAKE具有更好的接收信噪比增益.
Traditional RAKE receiver (CLRAKE) can not accurately estimate the phase difference between carriers in different paths, which leads to a sharp drop in the power utilization rate of multipath signals. In view of this defect, a multi-path separation algorithm is proposed The new coherent RAKE receiver (CORAKE) for carrier coherent demodulation of multipath signals is respectively adopted.The CORAKE performs coherent demodulation on the reception of each path signal, and the three local carriers respectively correspond to the phase difference of the corresponding three-path received signal carriers All 0, eliminating the influence of the phase difference of each carrier on the receiving performance.The simulation results show that CORAKE has better receiving SNR gain.