基于改进前导序列的60GHz OFDM系统测距方法

2015 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM) Pub Date : 2015-11-30 DOI:10.1109/PACRIM.2015.7334842

L. Cui, Hao Zhang, Xiu Liu, T. Gulliver

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引用次数: 1

摘要

本文提出了一种基于改进的正交频分复用(OFDM)信号前导序列的60ghz系统测距方法。重点分析了60GHz信道下OFDM调制距离估计的性能。为了充分利用OFDM信号在测距系统中的时频特性，提出了一种改进训练序列的子载波相位差算法。在60GHz信道下，在OFDM信号的前导序列中引入实值伪随机噪声(PN)序列和Zadoff-Chu (ZC)序列，提高了低信噪比下时域相关检测的精度。利用OFDM信号在频域的正交性，可以获得更高的精度。该测距方法在加性高斯白噪声(AWGN)信道的cram - rao下界(CRLB)附近工作。仿真结果表明，该方法在60GHz OFDM系统的TSV信道模型下获得了高精度的测距结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A ranging method for 60GHz OFDM system based on improved preamble sequence

This paper presents a ranging approach using an improved preamble sequence of orthogonal frequency-division multiplexing (OFDM) signal for 60 GHz system. The performance of range estimation with OFDM modulation under 60GHz channel is analyzed emphatically. In order to utilize the time-frequency characteristics of OFDM signal in the ranging system, the subcarriers phase difference algorithm with an improved training sequence is proposed. Under 60GHz channel, a real-valued pseudo-random noise (PN) sequence and Zadoff-Chu (ZC) sequence are introduced into the preamble sequence of OFDM signal to increase the accuracy of correlation detection in the time-domain at low Signal Noise Ratio (SNR). The orthogonality of OFDM signal in the frequency-domain is used to gain higher accuracy. The ranging method operates near Cramér-Rao lower bound (CRLB) in the additive white Gaussian noise (AWGN) channel. Simulation results with the proposed method are presented, which obtain high precision ranging results under the TSV channel model of 60GHz OFDM system.

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来源期刊

2015 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM)

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