INTERFERENCE CANCELLATION USING NON-LINEAR FILTERING

摘要

To process received wireless signals received in a receiver; a noise and interference estimate is generated by subtracting the component from the received OFDM signal, a normalized noise signal by whitening the noise and interference estimate is produced, interference estimation information is computed from the normalized noise signal, a non-linear frequency domain filtering operation is performed on an output of the interference estimation to generate a frequency domain filtered signal, and a non-linear time domain filtering operation is performed on the frequency domain filtered signal to generate an estimate of an unwanted component of the received OFDM signal. The non-linear filtering may be performed using a median filter or an adaptive median filter or an adaptive hybrid median filter.

主权项

1. A method of wireless signal processing performed at a receiver in a wireless cellular communication network, comprising:
receiving, by a wireless receiver, an orthogonal frequency division multiplexing (OFDM) signal; estimating, a component of the received OFDM signal corresponding to a serving cell transmission; generating a noise and interference estimate by subtracting the component from the received OFDM signal; producing a normalized noise signal by whitening the noise and interference estimate; computing interference estimation information from the normalized noise signal; performing a non-linear frequency domain filtering on an output of the interference estimation to generate a frequency domain filtered signal; and performing non-linear time domain filtering on the frequency domain littered signal to generate an estimate of an unwanted component of the received OFDM signal.