SLM peak-power reduction without explicit side information

TLDR

SLM peak‑power reduction selects the actual transmit signal from a set of alternatives, achieving distortionless reduction, but requires transmitting and protecting the signal‑generation information against bit errors. The authors propose an SLM extension that employs scrambling and eliminates the need for explicit side information at the receiver. This approach is applied to OFDM, using scrambling to avoid side‑information transmission while maintaining compatibility with any modulation scheme. The method introduces only minimal additional complexity and negligible redundancy, yet markedly improves transmit‑signal statistics.

Abstract

Selected mapping (SLM) peak-power reduction is distortionless as it selects the actual transmit signal from a set of alternative signals, which all represent the same information. The specific signal generation information needs to be transmitted and carefully protected against bit errors. Here, me propose an extension of SLM, which employs scrambling and refrains from the use of explicit side information in the receiver. Some additional complexity and nearly vanishing redundancy is introduced to achieve markedly improved transmit signal statistics. Even though SLM is applicable with any modulation, we concentrate on orthogonal frequency-division multiplexing (OFDM) in this letter.