Performance analysis of direct-sequence spread-spectrum multiple-access packet radio networks
Abstract
Throughput, delay and stability for direct-sequence spread-spectrum multiple-access (DS/SSMA) packet radio networks are analyzed. Infinite- and finite-user populations are considered where each user employs a newly chosen random signature sequence for each bit in a transmitted packet. Accurate packet success probabilities are computed using an improved Gaussian approximation technique which accounts for bit-to-bit error dependencies. Average throughput and delay results are obtained for DS/SSMA systems using varying levels of block error correction. Effective throughput and effective delay are computed to account for the overhead of the error control coding. First exit time (FET) is used as a measure of stability. Both slotted and unslotted networks are analyzed and their performance results are compared. Analysis of probability of bit error and packet success is considered with the near-far problem.
Degree
Ph.D.
Advisors
Lehnert, Purdue University.
Subject Area
Electrical engineering
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