Peak to average power ratio reduction in communication systems

Details Peak to average power ratio reduction in communication systems Peak to average power ratio reduction in communication systems

H - Electricity

04

J

H04J 1/02 (2006.01) H04B 1/04 (2006.01) H04L 5/02 (2006.01) H04L 27/26 (2006.01)

Patent

CA 2291493

A transmitter for use in a multicarrier communication system, the transmitter transmitting a multicarrier symbol, the multicarrier symbol having a peak-to-average power ratio (PAR) and being a function of a plurality of information signals, the transmitter comprising a power reducer, wherein the power reducer reduces the PAR of the multicarrier symbol by modifying a selected information signal of the plurality of information signals wherein the modified signal includes an information component, a peak reduction component, and a transmission channel response component. A method for reducing the peak-to-average ratio (PAR) of a multicarrier communication system, wherein the multicarrier symbol is a function of a plurality of signals, each of the plurality of signals centered at each one of a plurality of frequencies, the method comprising analyzing the multicarrier symbol to detect a peak in the multicarrier symbol, determining a first signal of the plurality of signals that contributes to the peak, and modifying the first signal by applying a peak reduction component to the first signal, the peak reduction component including a transmission channel component whereby by the PAR of the multicarrier symbol is reduced to compensate for the transmission channel effects on the power of the symbol.

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