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Analysis of a serial acquisition scheme for unslotted distributed direct-sequence packet radio networks

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3 Author(s)
Raghavan, A.R. ; Dept. of Electr. & Comput. Eng., Clemson Univ., SC, USA ; Baum, C.W. ; Noneaker, D.L.

This paper investigates the problem of acquisition in unslotted distributed direct-sequence packet radio networks. A noncoherent serial acquisition scheme is considered that uses passive matched filters to detect packet headers. A new Gaussian approximation is derived to model the effects of multiple-access interference during acquisition. This approximation takes into account oscillator inaccuracies and Doppler shifts, and its validity depends only on the presence of a sufficient number of chips in the acquisition header. In particular, the accuracy of the approximation is not contingent on the presence of a large number of equal-power interferers. False alarm processing is modeled and a simple expression for the probability of acquisition is derived. The problem of threshold selection is considered and it is shown that a single threshold can be chosen to provide acceptable performance in a wide range of channel conditions

Published in:

Communications, 1998. ICC 98. Conference Record. 1998 IEEE International Conference on  (Volume:3 )

Date of Conference:

7-11 Jun 1998