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Please use this identifier to cite or link to this item: http://hdl.handle.net/2031/4830

Title: Multiple-access schemes for IEEE802.15.4a
Authors: Wong, Ching Tin (黃正田)
Department: Department of Electronic Engineering
Issue Date: 2007
Supervisor: Supervisor: Prof. Zhang, Keith Q T.; Assessor: Dr. Wong, W K
Subjects: Wireless communication systems.
Notes: Nominated as OAPS (Outstanding Academic Papers by Students) paper by Department in 2007-08.
Abstract: Ultra wideband (UWB) impulse radio (IR) is a prospective transmission technology for low-rate indoor communications, as described in the physical layer proposals for IEEE 802.15.4a wireless personal area networks (WPAN). Time hopping (TH) is considered as an access scheme for multi-user UWB-IR systems. Communication over the indoor wireless channel is a technical challenge, not only because it is varies from place to place, but also because the signal suffers from heavy multi-path propagation. The motivation to search for improved modulation schemes is to improve the performance of data transmission, reduce the Bit Error Rate (BER) and increase the multiple-access capacity. In this project, two modulation schemes, namely, time hopping-binary phase shift keying (TH-BPSK) and time hopping-pulse position modulation (TH-PPM) were studied. Simulation is done using MatLab to verify that the performance is closed to theoretical value and TH-BPSK outperforms TH-PPM. The influence of different combinations of TH processing gains, multipaths and multi-users on BER performance of the two schemes is analysed and numerical results are presented for illustration.
Appears in Collections:Electronic Engineering - Undergraduate Final Year Projects
OAPS - Dept. of Electronic Engineering

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