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基于NC-OFDM和概率整形的新型宽带高频通信系统的设计与实现

Designand Implementation of a Novel Wideband HF Communication System Based on NC-OFDM and Probabilistic Shaping.

作者信息

Yang Rifei, Bai Yong, Hu Zhuhua

机构信息

School of Information and Communication Engineering, Hainan University, Haikou 570228, China.

出版信息

Sensors (Basel). 2025 Sep 8;25(17):5596. doi: 10.3390/s25175596.

DOI:10.3390/s25175596
PMID:40943025
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12431062/
Abstract

This paper proposes a novel wideband high-frequency (HF) communication system supporting video transmission based on non-contiguous orthogonal frequency division multiplexing (NC-OFDM) and probabilistic shaping (PS). The HF spectrum is currently very crowded; to find a free continuous frequency band around 500 KHz for video transmission is almost impossible. So this paper investigates how to exploit spectrum holes in the HF band with NC-OFDM technology. We propose a transmission scheme over a wideband HF channel modeled by the Institute for Telecommunication Sciences (ITS) channel model with valid bandwidth up to 1 MHz. In order to improve the reliability of proposed scheme, this paper further investigates the probabilistic shaping-based coding modulation. Simulation results show that the designed wideband HF NC-OFDM communication system can meet the data rate required for video transmission. In addition, the probabilistic shaping-based coding modulation provides a significant performance improvement over uncoded systems and the probabilistic shaping offers an extra 0.6 dB shaping gain in the wideband HF channel compared to equal probability constellation systems.

摘要

本文提出了一种基于非连续正交频分复用（NC-OFDM）和概率整形（PS）的新型宽带高频（HF）通信系统，用于支持视频传输。目前HF频谱非常拥挤，要在500 KHz附近找到一个用于视频传输的空闲连续频段几乎是不可能的。因此，本文研究了如何利用NC-OFDM技术来利用HF频段中的频谱空洞。我们提出了一种在由电信科学研究所（ITS）信道模型建模的宽带HF信道上的传输方案，其有效带宽高达1 MHz。为了提高所提方案的可靠性，本文进一步研究了基于概率整形的编码调制。仿真结果表明，所设计的宽带HF NC-OFDM通信系统能够满足视频传输所需的数据速率。此外，与未编码系统相比，基于概率整形的编码调制显著提高了性能，并且与等概率星座系统相比，概率整形在宽带HF信道中提供了额外0.6 dB的整形增益。

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本文引用的文献

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Sensors (Basel). 2022 May 17;22(10):3800. doi: 10.3390/s22103800.
2
Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review.用于通信目的的电离层窄带和宽带高频探测：综述
Sensors (Basel). 2020 Apr 28;20(9):2486. doi: 10.3390/s20092486.