Abstract
Orthogonal frequency-division multiplexing (OFDM) is an attractive transmission technique for high-bit-rate communication systems. One major drawback of OFDM is the high peak-to-average power ratio (PAPR) of the transmitter's output signal. A novel selected mapping (SLM) scheme is proposed, which employs matrix transformation, cyclically shifting, and linear combining algorithm to generate new candidates. The novel scheme requires only one IFFT and gets more candidate transmission signals throughout the entire process. The complexity analysis and simulation results show that this algorithm can dramatically reduce computational complexity comparing with the conventional SLM scheme as in Hill et al., 2000; Yang et al., 2009; Wang and Ouyang, 2005; Li et al., 2010; and Heo et al., 2007 under the similar PAPR reduction performance.
Highlights
Orthogonal frequency division multiplexing is an attractive technique for wireless high-rate data transmission due to the minimizing effects over frequency-selective fading channels [1]
peak-to-average power ratio (PAPR) reduction performances of the conventional and novel selected mapping (SLM) schemes were investigated by MATLAB simulations
When K = 5, the PAPR of the conventional SLM scheme is about 8.6 dB at CCDF = 0.1%, the definition of CCDF is given as complementary cumulative distribution function
Summary
Orthogonal frequency division multiplexing is an attractive technique for wireless high-rate data transmission due to the minimizing effects over frequency-selective fading channels [1]. The PAPR schemes can be classified according to whether they are deterministic or probabilistic Deterministic schemes, such as clipping [3], deliberately clip the peak amplitude of the OFDM signal to some desired maximum level. Probabilistic schemes, such as partial transmit sequences (PTS) [4, 5] and SLM [6,7,8,9,10,11,12], statistically improve the characteristics of the PAPR distribution of the OFDM signals without signal distortion.
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