具降低峰均值功率比預先編碼多通道系統之遞迴解碼

Abstract

In a multichannel system, the transmitter can perform precoding techniques to overcome the sub-channel interference. However, the precoding transformation matrix usually results in high peak to average power ratio (PAPR). In order to avoid inefficiently operating the power amplifier, for a precoded multi-input multi-output (MIMO) system, we consider the system with the PAPR reduction method based on integer reversible mapping which does not introduce redundancy or requires any control signaling. Nevertheless, the conventional decoding for the precoded system cannot be directly applied to our system model, otherwise a significant performance loss in bit error rate incurs. Therefore, we propose a decoding mechanism which uses the list sphere decoding and extracts the soft information for iterative detection and decoding. A noticeable improvement on the error performance is shown in simulations.