Selected Sorting for Par Reduction in Ofdm Multi-user Broadcast Scenarios
نویسندگان
چکیده
OFDM suffers from a high peak-to-average power ratio (PAR) of the transmit signal. This issue becomes even more important when considering multi-antenna systems. In this paper PAR reduction schemes for the multi-antenna broadcast scenarios are assessed. Hereby, the scheme Selected Sorting (SLS) is introduced and analyzed in terms of PAR reduction performance, error performance, and computational complexity. The huge benefit of this scheme is that no side information needs to be signaled to the receiver. Numerical results shown in this paper, demonstrate that SLS offers significant gains in PAR reduction. Moreover, Selected Sorting is compared with simplified Selected Mapping (sSLM), whereby SLS outperforms sSLM with respect to all three parameters, PAR reduction, error performance, and computational complexity.
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