Estimation of K-distribution parameters Using [zrlog(z)]

The parameters estimation of K-distribution based on zlog(z) expectation is extended to z^rlog(z) expectation. The parameters estimation expression is derived, and the estimate precision of z^rlog(z) expectation estimator is analyzed as exponential r is taken on various values. Simulation results show that in the parameters range of radar spiky clutter, the estimates based on z^rlog(z) expectation is more accurate than that based on zlog(z) expectation and normalised log estimator (NLE) when r is less than unity.