This paper analyzes the effect of non-linear amplifiers in Serial Modulation (SM) systems. It also investigates a modified version of Selected Mapping (SLM) algorithm for serial modulation. The improvement achieved by using this method to reduce Peak to Average Power Ratio (PAPR) and out of band radiation is represented. The results are also compared with SLM for OFDM. It is shown that this method can reduce out of band radiation of SM more effectively than SLM for OFDM for the same power back-off. To achieve more improvement especially for more nonlinear amplifiers, we suggest to use this modified SLM method with predistortion.

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Keywords OFDM, PAPR, Serial modulation, SLM algorithm
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Conference 62nd Vehicular Technology Conference, VTC 2005
Sabbaghian, M. (Maryam), & Falconer, D.D. (2005). Reducing required power back-off of nonlinear amplifiers in serial modulation using SLM method. In IEEE Vehicular Technology Conference (pp. 1882–1886). doi:10.1109/VETECF.2005.1558433