设计用于智能设备定位的声信号
Veronika Hromadova1, Peter Brida1, Juraj Machaj1
1Faculty of Electrical Engineering and Information Technology, University of Zilina, 01026 Zilina, Slovakia.
Sensors (Basel, Switzerland)
|September 28, 2023
概括
这项研究通过设计定制的音频信号,优化了智能手机的声学通信. 研究重点是改进室内定位系统,使用18-22 kHz之间的信号,最大限度地减少干扰,以获得更好的准确性.
科学领域:
- 声学信号处理 声学信号处理
- 室内定位系统的内部定位系统
- 无线通信是一种无线通信.
背景情况:
- 由于未知的技术规格和噪音,智能手机的音频功能对于精确的定位是有限的.
- 现有的声通信方法在室内环境中与干扰和信号退化作斗争.
研究的目的:
- 研究使用商用现成 (COST) 设备,特别是智能手机进行声学通信的最佳信号设计.
- 在室内环境中分析信号传播和性能,同时考虑房间声学.
- 定义有效的声信号传输和接收的参数,减轻符号间干扰 (ISI) 和多重访问干扰 (MAI).
主要方法:
- 对声通信的信号设计和性能分析的全面研究.
- 专注于室内环境中的信号传播,包括房间声学.
- 确定最佳参数:频段 (18-22 kHz),信号类型,信号长度 (50 ms),暂停时间 (5 ms) 和采样频率 (48 kHz).
- 考虑符号间干扰 (ISI) 和多重访问干扰 (MAI).
主要成果:
- 在智能手机等COST设备上定义了用于声通信的最佳信号参数.
- 在室内环境中特征信号行为和传播.
- 提出了一个定制的信号,长度为50ms,暂停为5ms,以尽量减少干扰.
- 建立了一个48kHz的采样速率,以提高信号分辨率.
结论:
- 优化的声信号参数提高了基于智能手机的室内定位系统的可行性.
- 建议的信号设计有效地减少干扰,提高检测准确度.
- 这项研究为为无处不在的设备开发强大的声学通信提供了基础.
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