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给出了复基带信号的三种载频频偏估计算法:基带信号谱对称性颇偏估计算法,同相-正交(I-Q)信号的叉积鉴频算法和最小二乘原理的频偏估计算法。并用三种算法对FM和PM卫星测控信号的复基带信号进行频偏估计,给出了计算机仿真结果,通过对三种算法的性能对比,得到了一些结论。
Three carrier frequency offset estimation algorithms for complex baseband signals are given: partial symmetry estimation of baseband signal symmetry, cross-product frequency discrimination algorithm of I-Q signals and frequency offset estimation of least square principle. The algorithm estimates the frequency offset of complex baseband signals of FM and PM satellite monitoring and control signals by using three algorithms. Computer simulation results are given. By comparing the performance of the three algorithms, some conclusions are obtained.