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Generalized likelihood detection on multiple access channels

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2 Author(s)
McCloud, M. ; Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA ; Scharf, L.L.

The problem of detecting the presence of a user on a multiple access channel and the problem of decoding this user's symbol sequence for both coherent and incoherent communications with M-ary signal sets are considered jointly. A test is proposed which solves this problem in two stages. The first stage is a threshold test based on the generalized likelihood ratio test with a threshold chosen to achieve a specified probability of false alarm. The second stage of the detector consists of a generalized maximum a posteriori probability decision rule. This stage is shown to be asymptotically efficient, conditioned on a correct detection of the user's presence.

Published in:

Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on  (Volume:2 )

Date of Conference:

2-5 Nov. 1997