solidot新版网站常见问题,请点击这里查看。
消息
本文已被查看3274次
Orthogonal Precoding for Ultra Reliable Wireless Communication Links. (arXiv:1710.09912v1 [cs.IT])
来源于:arXiv
All diversity sources of a wireless communication channel must be utilized to
enable ultra-reliable wireless communication links. Hadani et al. propose the
two dimensional discrete symplectic Fourier transform (DSFT) as orthogonal
pre-coder for orthogonal frequency division multiplexing (OFDM) in time- and
frequency-selective channels. In this paper we investigate general orthogonal
precoding (OP) and develop a low-complexity iterative channel estimation and
(near) maximum likelihood detection algorithm using soft-symbol feedback. We
present a general but compact framework to analyze the performance of OP and
its ability to utilize time- and frequency-diversity. We are able to proof that
all constant modulus sequences, e.g. such as the DSFT or Walsh-Hadamard
sequences, lead to the same performance for OP. Our OP receiver is tested by
numerical link level simulation for the DSFT, two dimensional discrete prolate
spheroidal sequences, and Walsh-Hadamard sequences. We demonstrate that our 查看全文>>