有限快拍四阶累量无偏估计性能分析
COVARIANCE PERFORMANCE ANALYSIS OF FINITE-SAMPLE CUMULANTS
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摘要: 关于累量域估计的研究以前主要着重于渐进性能的研究，包括渐近无偏估计及渐近方差。本文主要研究有限快拍累量域无偏估计性能，包括有限快拍的无偏估计及方差性能分析。仿真结果表明无偏估计在低信噪比情况下波达方向参数估计性能优于有偏估计，从而推动累量域本身估计的研究。
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关键词:
- 累量域; 有偏估计; 无偏估计
Abstract: In recent years, estimation in cumulant domains was studied mainly in the aspect of asymptotic performance, including asymptotic unbiased estimation and asymptotic covariance. Unbiased estimation performance for finite snapshots is discussed in this paper. Simulation results demonstrate that performance of DOA unbiased estimation is better than that of biased for low SNR. -
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