An Improved Zero-Forcing Detection Algorithm of Spread OFDM for Underwater Acoustic Communications
- 10.2991/eia-17.2017.83How to use a DOI?
- OFDM; underwater acoustic communication; Walsh-Hadamard (WH); zero force; minimum mean square error
The so-called spread OFDM(S-OFDM) system is designed to resist frequency-dependent attenuation by using Walsh-Hadamard (WH) code for spreading the frequency-domain OFDM symbols in the transmitter, and linear detectors, like ZF or MMSE, are usually used to recover the signals in the receiver. In this paper, an improved ZF detection algorithm is proposed for reducing the problem of amplifying noise compared with common ZF algorithm for spread OFDM in underwater acoustic channels. In contrast to the MMSE, the proposed algorithm dose not require estimating the variance of noise. Simulation results show that the proposed ZF algorithm has much better performance than that of common ZF method in all SNR range. Even if compared with MMSE, the proposed algorithm also gets much performance gain in high SNR range.
- © 2017, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Ke WANG AU - Leiyu SHI AU - Wei LIU AU - Jing LEI PY - 2017/07 DA - 2017/07 TI - An Improved Zero-Forcing Detection Algorithm of Spread OFDM for Underwater Acoustic Communications BT - Proceedings of the 2017 International Conference on Electronic Industry and Automation (EIA 2017) PB - Atlantis Press SP - 387 EP - 392 SN - 1951-6851 UR - https://doi.org/10.2991/eia-17.2017.83 DO - 10.2991/eia-17.2017.83 ID - WANG2017/07 ER -