NDLI: Throughput performance of multiuser detection in unslotted contention channels

Content Provider	IEEE Xplore Digital Library
Author	Brady, D. Merakos, L.F.
Copyright Year	1994
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA (Brady, D.; Merakos, L.F.)
Abstract	Analyzes the throughput of a centralized packet receiver which utilizes multiuser detection in an unslotted contention channel. The receiver is capable of demodulating all overlapping, unit-length packets, provided that the T-length packet headers do not overlap, and at most K packets overlap at any one time. If one of these conditions is violated, the remainder of the busy period is assumed to be unresolvable. Assuming that the aggregate packet arrival process is Poisson, the authors analyze the throughput as a function of the total offered load (/spl lambda/), the maximum number of resolvable overlapping packets (K), and the fractional header duration (T). They derive an iterative expression for the throughput for K=2 or 3, generalizable to larger K, which permits solution of the throughput to arbitrary accuracy. A closed form solution is given for the case K=2 and T=0.5. The authors provide bounds on the throughput for arbitrary K, /spl lambda/, and T, which are more convenient than the exact approach for T>0 or large K. Numerical results illustrate the improvement in throughput due to multiuser detection, and suggest a technique for finding the minimum complexity multiuser receiver (minimum K) as a function of other system parameters.
Starting Page	610
Ending Page	617
File Size	662960
Page Count	8
File Format	PDF
ISBN	0818655704
DOI	10.1109/INFCOM.1994.337680
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-06-12
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Throughput Multiuser detection Propagation delay Sea surface Modems Demodulation Closed-form solution Communication standards Government Transmitters
Content Type	Text
Resource Type	Article

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