Patent ID: 6952454
Filing Date: 2005-10-04
Classification: H04L

Abstract:
1. A transmitter unit for use in a multi-carrier communication system, comprising: one or more encoders, each encoder operative to receive and code a respective channel data stream to generate a corresponding coded data stream; a symbol mapping element coupled to the one or more encoders and operative to receive and map data from one or more coded data streams to generate modulation symbol vectors, wherein each modulation symbol vector includes a plurality of data values used to modulate a plurality of tones to generate an OFDM symbol, wherein the data from each coded data stream is mapped to a respective set of one or more circuits, and wherein each circuit includes a particular set of one or more tones, and further wherein each circuit is specific to a particular service; and a modulator coupled to the symbol mapping element and operative to receive and modulate the modulation symbol vectors to provide a modulated signal.