联合spirit用于啁啾扩频时延估计

Arjumand Yaqoob, J. Chong
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引用次数: 2

摘要

本文提出了一种估计IEEE 802.15.a啁啾扩频(CSS)时延的方法。通常,时间延迟可以通过对解码正弦信号样本的相位估计来估计。我们估计的相位差不是在一个子啁啾的样本之间,而是相邻子啁啾的样本之间,以放大相位差,使该技术更稳健,即使在低信噪比。我们使用联合ESPRIT技术来保留每个解码正弦波在低频段和高频段的相位信息。我们已经通过仿真和实现验证了该技术。
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Joint ESPIRIT for time delay estimation of chirp spread spectrum
In this paper we present a technique to estimate the time delay of IEEE 802.15.4a chirp spread spectrum (CSS). Conventionally, the time delay can be estimated by the phase estimation of the samples of a dechirped sinusoid. We estimate the phase differences not between samples in a sub-chirp but between samples of adjacent sub-chirps to magnify the phase differences making this technique more robust even in low SNR. We used joint ESPRIT technique in order to retain the phase information of each dechirped sinusoids in low and high bands. We have verified this technique through simulation and implementation.
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