Abstract
Abstract This paper investigates the peak-to-average power ratio (PAR) reduction scheme employing a simple symbol transform in OFDM-CDMA systems. This approach is very simple because of no additional complexity and works without restriction on the allocation of spreading code, maintaining an original transmission efficiency. Simulation results show that the investigated scheme gives an additional PAR reduction gain compared to the original OFDM and OFDM-CDMA signals, respectively. Also, this approach can provide the further PAR reduction by combining the partial transmit sequence (PTS) scheme, which is less complex compared to the ordinary PTS approach.
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