Low-resolution precoding techniques gained considerable attention in the wireless communications area recently. We propose three different soft detection methods and an iterative detection and decoding scheme that allow the utilization of channel coding in conjunction with low-resolution precoding. Besides an exact approach for computing the extrinsic information, we propose two approximations with reduced computational complexity. Numerical results based on PSK modulation and an LDPC block code indicate a superior performance as compared to the system design based on the common AWGN channel model in terms of bit-error-rate.

翻译：最近,无线通信领域对低分辨率预编码技术给予了相当重视,我们提出了三种不同的软检测方法和迭代检测和解码办法,允许在低分辨率预编码的同时使用频道编码,除了计算外部信息的一种精确方法外,我们还提出了两种计算复杂性降低的近似值,基于PSK调制的数值结果和LDPC区块代码表明,与基于共同的AWGN频道模型的系统设计相比,在比特-eror-速率方面,与系统设计相比,其性能优异。