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Proceedings Paper

Preamble design and acquisition for CPM
Author(s): Jeff Pugh; Colin Brown; Phil Vigneron
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Paper Abstract

Packet-based communication systems, such as Time Division Multiple Access (TDMA) systems, often employ a preamble sequence to allow coarse estimation of carrier frequency offset, phase offset, and signal delay at the receiver. Successful acquisition of these parameters is of critical importance in synchronization and data demodulation. In this work, a simple preamble structure consisting of a continuous wave (CW) signal followed by a unique, continuous phase modulated (CPM) start-of-message (SOM) sequence is analyzed. Simulation results for frequency, phase and timing error are shown to compare favourably with their respective lower bounds. The required CW and SOM sequence lengths are established by statistical analysis of the effect of residual frequency error on symbol timing performance. In particular, it is shown that an iterative peak search of the SOM crosscorrelation nearly achieves the modified Cramer-Rao bound (MCRB) on symbol timing, making it an attractive option for timing acquisition with minimal overhead. In addition, the proposed preamble format and processing approach are compared to that of the MIL-188-181B standard.

Paper Details

Date Published: 28 April 2010
PDF: 12 pages
Proc. SPIE 7706, Wireless Sensing, Localization, and Processing V, 77060O (28 April 2010); doi: 10.1117/12.852600
Show Author Affiliations
Jeff Pugh, Communications Research Ctr. (Canada)
Colin Brown, Communications Research Ctr. (Canada)
Phil Vigneron, Communications Research Ctr. (Canada)

Published in SPIE Proceedings Vol. 7706:
Wireless Sensing, Localization, and Processing V
Sohail A. Dianat; Michael D. Zoltowski, Editor(s)

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