具有指数调制的频谱通信 (Frequency-Shift Chirp Spread Spectrum Communications with Index Modulation)

from arxiv, The first version of this paper was submitted to IEEE Internet of Things Journal on July 14, 2020. The revised version was submitted on October 28, 2020, accepted May 15, 2021. The main idea and results of this work are documented in United States Patent #10,778,282, Sept. 2020. (https://researchers.usask.ca/ha-nguyen/documents/patents/us10778282b1-hanif.pdf)

This paper introduces a novel frequency-shift chirp spread spectrum (FSCSS) system with index modulation (IM). By using combinations of orthogonal chirp signals for message representation, the proposed FSCSS-IM system is very flexible to design and can achieve much higher data rates than the conventional FSCSS system under the same bandwidth. The paper presents optimal detection algorithms, both coherently and non-coherently, for the proposed FSCSS-IM system. Furthermore, a low-complexity non-coherent detection algorithm is also developed to reduce the computational complexity of the receiver, which is shown to achieve near-optimal performance. Results are presented to demonstrate that the proposed system, while enabling much higher data rates, enjoys similar bit-error performance as that of the conventional FSCSS system.

翻译：本文介绍了一种具有指数调制(IM)的新式的调制频率易变正声频谱(FSCSS)系统。拟议的FSCSS-IM系统在设计上非常灵活,并且能够在同一带宽下达到比常规的FSCSS系统高得多的数据率。本文为拟议的FSCSS-IM系统提供了一致和非一致的最佳检测算法。此外,还开发了一种低兼容性非相容的检测算法,以减少接收器的计算复杂性,这表现为接近最佳的性能。结果显示,拟议的系统在促成更高数据率的同时,具有与常规FSCSS系统的类似比位器性性能。