Patent ID: 8391386
Filing Date: 2013-03-05
Classification: H04L,H04W

Abstract:
1. A transmitting apparatus operable in a wireless communication system, comprising: a receiving circuit configured for receiving an indication of a usable bandwidth of a receiving apparatus based on a communication from the receiving apparatus; a transmitting circuit configured for constructing and transmitting an orthogonal frequency division multiplexing (OFDM) signal having a plurality of subcarriers allocated among one or more frequency channels comprising all or a part of a frequency band used by the transmitting circuit for transmitting signals, wherein the one or more frequency channels correspond to the usable bandwidth of the receiving apparatus, and wherein the transmitting circuit receives an indication of the usable bandwidth based on a communication from the receiving apparatus; and signal processing components configured to allocate data to be received by the receiving apparatus to a plurality of used subcarriers within a data portion of the OFDM signal, but not to a plurality of unused subcarriers within the data portion; wherein the OFDM signal further comprises a broadcast portion carrying broadcast information; wherein the broadcast information comprises an indirect indication of the positions of the unused subcarriers within the data portion of the OFDM signal, whereby the positions of the unused subcarriers within the data portion are mutually known between the transmitting apparatus and the receiving apparatus in relation to the indirect indication; and wherein the unused subcarriers are determined based on the usable bandwidth of the receiving apparatus.