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Title

Signal Properties of Hybrid LFSK Modulated MQAM (HQFM) OFDM Transceiver

Author

Asma Latif, Nasir D. Gohar

Citation

Vol. 7  No. 11  pp. 72-76

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is a promising candidate supporting high data rates with reasonable complexity in wireless fading channels. However, a major disadvantage of OFDM is its large peak-to-average power ratio (PAPR), which significantly decreases the transmitter high power amplifier’s efficiency. There are several techniques to reduce this PAPR. Almost, all of them, are either suited for specific application or works with small number of subcarriers. If these problems are overcome, then they, like PTS, usually need side-information to be transmitted along with the modified signal. A simple and efficient Hybrid OFDM Transceiver is suggested that effectively reduces PAPR. Also, system’s BER is improved. Unlike PTS, no side-information for transmission is needed. Two modified algorithms for the proposed modulator are presented for which the PAPR reduction capability is either comparable or better as compared PTS.

Keywords

OFDM, PAPR, PTS

URL

http://paper.ijcsns.org/07_book/200711/20071112.pdf