Abstract:In the Time Difference Of Arrival (TDOA) measurement system, the performance of time difference estimation degrades due to the inevitable presence of phase noises of local oscillators at spatially separated receivers. The effect of the phase noise on the unbiasedness of classic cross-correlation time difference estimator is discussed herein, as well as the Cramér-Rao Lower Bound (CRLB) of estimation is derived in the phase noise environment. Furthermore, the CRLB of time difference estimation in additive noise environment with phase noise considered is derived. The CRLB degradation coefficient with respect to the CRLB in the additive noise environment is also given. The theoretical analysis is validated by the simulation results.
钟森, 夏威, 何子述. 相位噪声对时差估计的影响分析[J]. 电子与信息学报, 2014, 36(11): 2614-2620.
Zhong Sen, Xia Wei, He Zi-Shu. Analysis of the Effect of Phase Noise on Time Difference Estimation. , 2014, 36(11): 2614-2620.