Patent ID: 7606138
Filing Date: 2009-10-20
Classification: H04L

Abstract:
1. An OFDM receiver for receiving a multi-symbol encapsulated (MSE) OFDM signal transmitted along a transmission channel, said MSE OFDM signal comprising a preamble sequence having a pre-determined structure, the OFDM receiver comprising: an A/D converter for sampling the received OFDM signal at a sampling frequency and for producing a sequence of received waveform samples; a synchronization and channel estimation unit adapted to identify the preamble sequence in the sequence of received waveform samples and to perform channel and frequency offset estimation from the received preamble sequence and the pre-determined structure of the preamble sequence; a cyclic guard removing unit adapted to identify information-bearing OFDM frames in the sequence of received waveform samples, to remove the cyclic guard portions from each identified OFDM frame and to produce a sequence of guard-removed OFDM frames; a channel equalizer, comprising: