PAPR Reduction in OFDM Systems with Per-Subcarrier Antenna Selection

Abstract

In this paper, we present a new tone reservation (TR) scheme that facilitates peak-to-average power ratio (PAPR) reduction in orthogonal frequency-division multiplexing systems employing antenna selection on a per-subcarrier basis. In contrast to conventional TR schemes, the proposed technique does not lead to a reduction in the data rate, although it does introduce a controllable level of interference into the transmission, which can affect the throughput. We show that this drawback is manageable by analyzing the signal-to-interference-plus-noise ratio and the bit-error rate at high signal-to-noise ratio, and we conclude that it is best to allocate a large number of tones for PAPR reduction using only a small amount of power per tone. Finally, we illustrate through simulations that the proposed TR scheme is capable of facilitating PAPR reduction in practical systems.