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High Peak to Average Power Ratio (PAPR) is one of the major drawbacks in Orthogonal Frequency Division Multiplexing (OFDM). The High PAPR increases the complexity of Analogue to Digital (A/D) and Digital to Analogue (D/A) convertors and also reduces the efficiency of RF High Power Amplifier (HPA). In this paper we present ananalysis of Discrete Hartley Transform (DHT) pre coded OFDM system using M-QAM (where M=16, 32, 64, 256). We compare the computer simulation results of DHT pre-coded OFDM system with DFT pre coded OFDM system, Walsh Hadamard Transform (WHT) pre coded OFDM system, Selected Mapping (SLM) based OFDM system and OFDM conventional. Simulation results show that the PAPR of DHT pre-coded OFDM system is lower than WHT pre-coded OFDM system, SLM-OFDM system and OFDM conventional. We also concluded in this paper that DFT pre-coded OFDM system has zero PAPR.Index Terms
matlab
ofdm
系统
比分
功率
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