基于M元扩频的循环码移位键控短数据帧检测研究

doi:10.12305/j.issn.1001-506X.2026.01.33

摘要/Abstract

摘要：

针对大规模物联网短数据包帧结构中前导码开销过大的问题，提出了一种无前导码检测方法。该方法基于循环码移位键控的M元扩频和非二进制低密度奇偶校验码结合的短数据包，提出了该短数据包系统的盲检测算法的理论表达式，并通过蒙特卡罗仿真验证理论模型推导的正确性，并进行不同参数下的性能仿真。结果表明所提出的盲检测算法可以有效对抗时间偏移和频率偏移影响，在非常低的信噪比下实现可靠检测，并可根据应用场景灵活选择M元扩频阶数以实现携带信息量与检测性能的均衡。

关键词: 低功耗广域网, 短数据包, M元扩频, 循环码移位键控, 盲检测

Abstract:

To address the excessive preamble overhead in large-scale Internet of Things short data packet frame structures, a preamble-free detection method is proposed. This method combines M-ary spread spectrum with cyclic code shift keying and non-binary low density parity check code for short data packets. The theoretical expression for the blind detection algorithm of the short data packet system is introduced, and the accuracy of the theoretical model is validated through Monte Carlo simulations. Performance simulations are carried out across various parameters, demonstrating that the proposed blind detection algorithm effectively mitigates the effects of time and frequency offsets, achieves reliable detection at very low signal-to-noise ratio, and allows for a flexible selection of the M-ary spread spectrurl order to balance information carrying capacity with detection performance, in line with the application scenario.

Key words: low power wide area network, short data packet, M-ary spread spectrum, cyclic code shift keying, blind detection

中图分类号:

TN 91

王颢, 窦高奇, 修梦雷, 王臻. 基于M元扩频的循环码移位键控短数据帧检测研究[J]. 系统工程与电子技术, 2026, 48(1): 372-379.

Hao WANG, Gaoqi DOU, Menglei XIU, Zhen WANG. Research on short data frame detection using cyclic code shift keying with M-ary spread spectrum[J]. Systems Engineering and Electronics, 2026, 48(1): 372-379.

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