Receiver with ICI noise estimation

摘要

The invention concerns receive circuitry for demodulating an input signal received from a transmission channel, the receive circuitry having a decision feedback equalizer including an inter-carrier interference estimation block arranged to provide an estimation of inter-carrier interference (ICI) noise based on at least a channel estimation determined for a previous symbol, a channel estimation determined for the next symbol, and on a previous estimation of the symbol data for the current symbol, the previous estimation being provided by a feedback path comprising a demapping block; and correction circuitry arranged to determine the estimation of the original data signal based on the estimation of ICI noise subtracted from the input signal.

主权项

1. Receive circuitry operative to demodulate an input signal received from a transmission channel, the input signal comprising symbols having a plurality of sub-carriers comprising a plurality of data sub-carriers modulated by an original data signal and, in at least certain symbols, a plurality of pilot sub-carriers modulated by reference signals, the receive circuitry comprising:
a decision feedback equalizer arranged to iteratively process said input signal for a current symbol to generate an estimate of the original data signal modulated by the current symbol, the decision feedback equalizer comprising
an inter-carrier interference (ICI) estimation block arranged to provide an estimate of ICI noise based on at least a channel estimate determined for a previous symbol, a channel estimate determined for a next symbol, and on a previous estimate of symbol data for the current symbol, the previous estimate being provided by a feedback path comprising a demapping block, wherein the demapping block determines an estimation of the original data signal based on a known alphabet of the symbol data; andcorrection circuitry arranged to determine the estimate of the original data signal based on said estimate of ICI noise subtracted from said input signal.