Invention Grant
US07830782B2 Method of using guard tones in OFDM systems for increasing robustness 有权
在OFDM系统中使用保护音调以提高鲁棒性的方法

Method of using guard tones in OFDM systems for increasing robustness
Abstract:
The present invention provides a method and system for increasing communication robustness between wireless communication devices by transmitting data on Orthogonal Frequency Division Multiplexing (OFDM) guard tones. In one embodiment, punctured bits are sent on the guard tones. In an alternate embodiment, the full bandwidth provided by the guard tones in used to determine the optimal puncture pattern. The present invention can also use guard tones to duplicate data from those tones which are experiencing channel interference. The receiver feeds back information about tones in interference, and the transmitter send the interfered data on the guard tones. Guard tones are used for sending feedback information to the transmitter in order to increase system robustness. This provides the transmitter with information on how to use the guard tones and adapt the transmission data rates to maximize system performance.
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