Signal mapping for bit-interleaved coded modulation with iterative decoding
department or school: Applied Science, Faculty of
data provider: DSpace
degree campus: UBCO
creator: Mohammadnavazi, Hassan
issued: 2018-04-25T00:00:00
issued: 2018
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Due to its convenience, wireless communication systems have grown tremendously. Data rate requirements of various services/applications that are transmitted over wireless channels are increasing day by day. Bit interleaved coded modulation (BICM), which is a serial concatenation of a channel encoder, an interleaver and a symbol mapper, is a spectral efficient technique that is being used in many wireless systems. The performance of BICM can be significantly improved by using the iterative decoding technique at the receiver. This system is referred as BICM with iterative decoding (BICM-ID), and offers an improved performance over both fading and nonfading channels. It is well-known that BICM-ID performance is strongly dependent on the applied signal mapping. Signal mapping is the assignment of binary bits to complex symbols from a modulation alphabet. It is demanded to use a higher order modulation in BICM-ID to achieve a higher data rate and spectral efficiency. However, finding a mapping for a large modulation that offers an improved performance for BICM-ID is very complicated. This is because of the huge number of possible mappings for higher order modulations. This thesis focuses on the mapping problem for BICM-ID systems. In particular, novel mapping methods are developed for higher order modulations, including two-dimensional and multi-dimensional modulations. The proposed methods in this thesis consist of (i) heuristic methods and (ii) computer search techniques. In comparison with the previously known mappings, the proposed mappings significantly improve the BICM-ID performance over the considered channels. This is confirmed by various analytical and simulation results that are investigated in this thesis.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/65647
note: eIGNSL MSbbING FadTIf-INfWdLWShWV UaVWVMaVgLSfIaN iIfH IfWdSfIhWVWUaVINGbyHassan MohammadnavaziA THESIS SUBMITTED IN PARTIAL FULFILLMENT OFTHE REQUIREMENTS FOR THE DEGREE OFDOCTOR OF PHILOSOPHYinThe College of Graduate Studies(Electrical Engineering)THE UNIVERSITY OF BRITISH COLUMBIA(Okanagan)April 2018c© Hassan Mohammadnavazi 2018ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis/dissertation entitled: Signal Mapping for Bit-Interleaved Coded Modulation with Iterative Decoding submitted by Hassan Mohammadnavazi in partial fulfillment of the requirements of the degree of Doctor of Philosophy. Dr. Md. Jahangir Hossain, School of Engineering Supervisor Prof. Julian Cheng, School of Engineering Supervisory Committee Member Dr. Thomas Johnson, School of Engineering Supervisory Committee Member Prof. Shawn Wang, Irving K. Barber School of Arts and Sciences University Examiner Dr. Nghi Tran, Electrical and Computer Engineering, University of Akron, OH, USA External Examiner iiStstrsutDue to its convenience, wireless communication systems have grown tremendously. Datarate requirements of various services/applications that are transmitted over wireless chan-nels are increasing day by day. Bit interleaved coded modulation (BICM), which is a serialconcatenation of a channel encoder, an interleaver and a symbol mapper, is a spectral effi-cient technique that is being used in many wireless systems. The performance of BICM canbe significantly improved by using the iterative decoding technique at the receiver. Thissystem is referred as BICM with iterative decoding (BICM-ID), and offers an improvedperformance over both fading and nonfading channels. It is well-known that BICM-IDperformance is strongly dependent on the applied signal mapping. Signal mapping is theassignment of binary bits to complex symbols from a modulation alphabet. It is demandedto use a higher order modulation in BICM-ID to achiev…
has type: Thesis/Dissertation
date issued: 2018-05
is shown at: 10.14288/1.0366017
language: eng
degree discipline: Electrical and Computer Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/65647