Simultaneous Localization and Communication Method using Short-time and Narrow-band Dual-carrier Acoustic Signals
Simultaneous Localization and Communication Method using Short-time and Narrow-band Dual-carrier Acoustic Signals
复制标题
利用短时窄带双载波声信号的同时定位和通信方法
DOI：
10.1109/jsen.2021.3107849
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发表时间：
2021
影响因子：
4.3
通讯作者：
M.
中科院分区：
文献类型：
--
作者：
Nakamura;M.;Hashizume;H.;Sugimoto;M.
本文描述了一种使用多个扬声器的新颖的声学定位和通信方法。用于定位的声学信号通过差分相移键控进行调制以包含一些信息。因此，定位和通信可以同时进行。对于声信号的设计，短时、窄带的声信号是节省时间和频率资源的理想选择。然而，如果采用传统方法使用此类信号，可能会发生信号干扰，导致定位和通信错误。另外，该误差根据与通信调制相对应的相位值而变化。为了减少这个误差，在我们提出的方法中，使用双载波声信号构成接收信号中的非干扰区域，并使用该区域进行定位和解调。在评估实验中，我们估计两个扬声器的麦克风方位角，并解调 9 个位置的每个符号。通过仿真和真实环境实验，证实我们提出的方法可以减少干扰造成的误差。在真实环境实验中，我们提出的方法的解调性能与传统方法相似。我们讨论了这种相似性并揭示了原因。
This paper describes a novel acoustic localization and communication methods using multiple speakers. Acoustic signals for localization are modulated by differential phase shift keying to contain some information. Therefore, localization and communication can be conducted simultaneously. Regarding the design of acoustic signals, short-time and narrow-band acoustic signals are ideal to save time and frequency resources. However, if such signals are used with conventional methods, the interference of signals can occur and cause errors of localization and communication. Additionally, this error changes depending on the phase value that corresponds to the modulation for communication. To reduce this error, in our proposed method, a noninterference region in the received signal was constituted by using dual-carrier acoustic signals, and localization and demodulation were processed using this region. In the evaluation experiments, we estimate the azimuth of the microphone from two speakers and demodulate each of the symbols at 9 locations. Through simulation and real-environment experiments, it was confirmed that our proposed method can reduce the error caused by the interference. In real-environment experiments, the demodulation performance of our proposed method was similar to that of conventional methods. We discussed this similarity and revealed the cause.