Method and Apparatus for Signal Quality Reporting for Interference-Cancellation Receivers

摘要

In one aspect, the teachings herein disclose a method and apparatus for signal quality reporting from a wireless apparatus that better reflects the actual interference cancellation efficiency expected at the wireless apparatus for a given transmission interval. In one example, the wireless apparatus knows or predicts the particular modulation and coding schemes (MCSs) that will be used in the transmission of one or more interferer signals for a transmission interval of interest. In turn, it uses those MCS values to estimate the actual interference cancellation efficiency the wireless apparatus will achieve with respect to those interferers. The wireless apparatus estimates and reports signal quality according to its estimated interference cancellation efficiency. Such processing allows the supporting wireless communication network to improve throughput by more aggressively scheduling the wireless apparatus for transmission intervals during which the wireless apparatus exhibits higher interference cancellation efficiency.

主权项

1. A method in a wireless apparatus configured for operation in a wireless communication network, the method comprising:
receiving a signal from the wireless communication network that includes a desired signal and one or more interferer signals; estimating an initial impairment covariance of the desired signal; for each interferer signal:
estimating a signal quality of the interferer signal;determining a modulation and coding scheme, MCS, of the interferer signal;estimating a cancellation efficiency of the wireless apparatus with respect to the interferer signal, based on the signal quality and MCS of the interferer signal; andcalculating an impairment covariance correction term corresponding to the interferer signal, by computing the signal covariance of the interferer signal and scaling the signal covariance according to the cancellation efficiency; obtaining a compensated impairment covariance for the desired signal by subtracting each impairment covariance correction term from the initial impairment covariance; estimating a signal quality of the desired signal as a function of the compensated impairment covariance; and reporting the signal quality of the desired signal to the wireless communication network.