OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
OFDM and MC-CDMA for Broadband Multi-User Communications, WLANs and Broadcasting
An overview of peak-to-average power ratio reduction techniques for multicarrier transmission
IEEE Wireless Communications
Dummy sequence insertion (DSI) for PAPR reduction in the OFDM communication system
IEEE Transactions on Consumer Electronics
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This paper investigates the problem of peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) system. It presents a new PAPR reduction method based on the insertion of dummy signals in a complex Gaussian distribution form to the data constellation points in frequency domain. The inserted signals alter the constellation shape by spreading extra points between the original points. This change in shape is accompanied by changes in the statistical properties and hence a reduction in the PAPR value. This scheme reduces significantly the PAPR on a cost of slight degradation in the bit error rate (BER) and some decrease of transmission bit rate. Moreover, there is no out-of-band distortion resulted and there is no need to send additional side information. For 64-PSK OFDM system with 128 data sub-carriers, a 4dB reduction in PAPR value is achieved.