Patent ID: 7844006
Filing Date: 2010-11-30
Classification: H04L

Abstract:
1. A method for Doppler compensation of an orthogonal frequency division multiplexed (OFDM) signal, the method comprising: determining a predicted phase for each subchannel in a plurality of subchannels for a current OFDM block in response to a phase estimate and a Doppler rate for a previous OFDM block; determining an angular offset for each of the subchannels over the duration of the previous OFDM block; generating an estimate of the Doppler rate for the current OFDM block; determining a final phase estimate for each of the subchannels in response to the estimate of the Doppler rate for the current OFDM block; generating a data symbol estimate for each of the subchannels in response to a respective one of the final phase estimates; and deciding a data symbol value for each of the subchannels based on a respective one of the data symbol estimates.