Item – Theses Canada

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OCLC number
1019463873
Link(s) to full text
LAC copy
Author
Tawfiq, Ali.
Title
Orthogonal Codes for CDMA-based Asynchronous Medical Wireless Body Area Networks (WBANs).
Degree
M.A. Sc. -- University of Toronto, 2012
Publisher
Ottawa : Library and Archives Canada = Bibliothèque et Archives Canada, 2013.
Description
1 online resource
Notes
Includes bibliographical references.
Abstract
The presented work considers a CDMA-based Wireless Body Area Network (WBAN) where multiple biosensors communicate simultaneously to a central node in an asynchronous fashion. The asynchronous nature of the WBAN introduces Multiple Access Interference (MAI). To combat this problem, presented is a methodology that uses a set of cyclically orthogonal spreading codes extracted from the Walsh-Hadamard matrix. When using the Cyclic Orthogonal Walsh-Hadamard Codes (COWHC) as spreading codes in the CDMA-based WBAN, the cyclic orthogonality property helps mitigate MAI amongst the on-body sensors. Presented is an ideal communication system that is most effective at mitigating MAI in proactive WBANs. The work illustrates the system optimality and effectiveness at mitigating MAI by studying the sensitivity to packet-loss through simulating the link Bit Error Rate (BER) performance. It is shown that the proposed design with COWHC, a Rayleigh at-fading channel, BPSK modulation and a conventional receiver produce optimum MAI mitigation.
ISBN
9780494930496
0494930497
9780494930496