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Generalized Q-functions for application to noncoherent serial detection of spread-spectrum communication signals

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1 Author(s)
G. Giunta ; INFOCOM Dept., Rome Univ., Italy

This correspondence considers performance analysis of a particular sequential hypothesis test based on noncoherent correlation from overlapping data, which has application in acquisition for spread-spectrum communications. The main contribution of the correspondence is to define a special function (GQ-function) and to express the false alarm and detection probabilities in terms of these functions. The evaluation of these functions in terms of a truncated series is also discussed and compared with standard techniques. An upper bound of the approximation error is derived to determine the number of terms for a given accuracy. Some examples of application to serial detection of direct-sequence spread-spectrum signals are provided, evidencing the possible reduction of the mean acquisition time allowed by multidwell serial tests

Published in:

IEEE Transactions on Signal Processing  (Volume:48 ,  Issue: 5 )