Radio frequency receiver capable of determining a noise estimate in case of received power unbalanced antennas and method of operating thereof

摘要

The present application suggests a receiver and a method of operating thereof for determining a noise estimate based on a radio frequency signal from an interference source over different propagation paths through a plurality of antennas. A covariance matrix estimator coupled through separate processing paths to a respective one of the plurality of antennas is arranged to determine an estimate of a covariance matrix based on the received radio frequency signal. A noise estimator coupled to the covariance matrix estimator for receiving the estimate of the covariance matrix is arranged to determine a noise estimate by solving a polynomial equation of second order as a function of the noise estimate on the basis the elements of the covariance matrix estimate relating to a set of two antennas.

主权项

1. A method of determining a noise estimate in case of receiver power unbalanced antennas, said method comprising:
receiving radio frequency signal at least from an interference source through a plurality of antennas over different propagation paths and processing paths; determining a covariance matrix estimate based on the received radio frequency signal; and determining the noise estimate by calculatingN^=T-T2-4⁢Δ2, wherein {circumflex over (N)} is the noise estimate; and
Δ=c11c22−c12c21;T=c11+c22; andcjk, where j, k=1, 2, are elements of the covariance matrix estimate relating to two antennas of the plurality of antennas.