Patent ID: 7088782
Filing Date: 2006-08-08
Classification: H04B,H04L

Abstract:
1. An apparatus for synchronizing a Multi-Input, Multi-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) system, the apparatus comprising: a number (Q) of OFDM modulators, each OFDM modulator producing a frame comprising at least one inserted symbol, a plurality of data symbols, and cyclic prefixes; Q transmitting antennas, each transmitting antenna connected to a respective OFDM modulator, for transmitting said frame over a channel; a number (L) of receiving antennas for receiving the transmitted frames; and L OFDM demodulators, each OFDM demodulator corresponding to a respective receiving antenna, the L OFDM demodulators comprising a synchronization circuit, which processes the received frame in order to synchronize the received frame in a time domain and frequency domain; wherein the synchronization circuit comprises a first portion that includes individual circuits such that each individual circuit is used exclusively by a respective OFDM demodulator, and a second portion that includes circuits that are shared by all of the L OFDM demodulators.