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Title: Constellation Shaping and Peak-to-Average Power Ratio Reduction Algorithms for Wireless Communications
Author: Khoo, Boon Kien
ISNI:       0000 0001 3598 7579
Awarding Body: Newcastle University
Current Institution: University of Newcastle upon Tyne
Date of Award: 2005
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Wireless communication technologies have undergone an explosive growth over the last two decades. High reliable transmission, high data rate, bandwidth and power-efficient communications are however major concerns for future wireless application designs. In the first part of this thesis, a bandwidth as well as power-efficient coded modulation system is proposed. Bit-interleaved coded modulation (BICM) system is a well-known bandwidth-efficient coded modulation scheme that concatenates channel codi!1g, interleaver and modulation block. The concatenation makes the BICM system similar to a serial concatenated convolutional code, and thus suggests that, in the receiver, the demodulation block and decoder can operate in an iterative manner resulting in turbo-like performance. Such system, known as bit-interleaved coded modulation with iterative decoding (BICM-ID), is well suited to additive white Gaussian noise channel. In the proposed technique, the BICM-ID system is modified by inserting a single short-length binary shaping block code for constellation shaping purpose. The corresponding receiver structure is then made up of four main blocks exchanging extrinsic information. By combining constellation shaping and BICM-ID system, the average transmitted power can be reduced and thus resulting bandwidth as well as power-efficient coded modulation system. In the second part of the thesis, high peak-to-average power ratio· (PAPR) of orthogonal-frequency division multiplexing (OFDM) for high data rate communication systems is focused. To date, there are a number of existing techniques for PAPR reduction. Among these techniques, selected mapping (SLM) technique is one of the well-known method to overcome the PAPR problem. However, the implementation of SLM technique required side information transmission. To this end, a simple SLM technique for PAPR reduction in OFDM that does not require the explicit transmission of side information is proposed.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available