A Computationally Efficient Ranging Scheme for IEEE 802.15.4a CSS System

Sujin KIM  Na Young KIM  Youngok KIM  Joonhyuk KANG  

IEICE TRANSACTIONS on Communications   Vol.E93-B   No.3   pp.745-748
Publication Date: 2010/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.745
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
ranging,  CSS,  MMSE,  low complexity,  

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In this study, a computationally efficient ranging scheme exploiting a minimum mean square error (MMSE) and a matrix-pencil (MP) technique is proposed for the IEEE 802.15.4a chirp spread spectrum (CSS) system. Based on the characteristics of the CSS signal, a practical methodology for the MMSE process is devised and the appropriate values of parameters, which are cutoff bandwidth, number of samples and sampling duration in frequency domain, are investigated and numerically determined to enhance the performance. The performance of proposed scheme is analyzed in terms of the computational complexity and the ranging estimation errors. Simulation results demonstrate that the proposed scheme performs as well as the conventional scheme at remarkably reduced computational costs.