Patent ID: 8824539
Filing Date: 2014-09-02
Classification: H04L

Abstract:
1. An Orthogonal Frequency Division Multiplexing (OFDM) receiver for processing an OFDM received signal and adapted to perform OFDM reception in the presence of Doppler, the OFDM receiver comprising: a subtractor configured to receive a first input comprising the received signal and a second input from a feedback loop, the feedback loop receiving a feedback signal from an output, the subtractor further providing a subtractor output to the input of at least two parallel processing chains; a linear multipath equalizer and detector configured to receive outputs of the parallel processing chains, the linear multipath equalizer and detector configured to output an estimation of a sequence of transmitted data, wherein the estimation of the sequence of transmitted data is the output, the feedback loop further comprising: the subtractor output comprising at least two parallel processing chains each of the at least two parallel processing chains comprising: a time domain windowing processor configured to process an OFDM block, the time domain windowing processor comprising an element by element multiplication of the OFDM block, by a set of predetermined coefficients; and a Discrete Fourier Transform (DFT) block configured to demodulate a windowed OFDM symbol from the OFDM block into its frequency domain equivalent; wherein the time domain windowing of the at least two parallel processing chains comprise complimentary profiles so as to avoid any loss of information throughout the OFDM signal.