Chan Vee Chong

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David Seamon

Kansas State University

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Bursa Technical University

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Sophia University

Aminuddin Ab Ghani

Universiti Sains Malaysia

Akintunde K Otubu

University Of Lagos Akoka

Matthew Thompson

University College London

ezgi orhan

Cankaya University

Jonathan DeVore

University of Cologne

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Southern University Law Center

Raquel Tardin-Coelho

Curtin University, Perth

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Papers by Chan Vee Chong

Quadrature amplitude modulated codes with low peak-to-mean envelope power ratio for orthogonal frequency division multiplexing applications

Orthogonal Frequency Division Multiplexing (OFDM) has been adopted as the modulation technique fo... more Orthogonal Frequency Division Multiplexing (OFDM) has been adopted as the modulation technique for many of the next generation wireless broadband multimedia communications systems, for example, Digital Audio Broadcasting (DAB), terrestrial Digital Video Broadcasting (DVB), and the wireless local area network (LAN) standards HIPERLAN/2, and IEEE 802.11a. One problem inherent in plain vanilla OFDM is that its signal envelope fluctuates greatly with very high power peaks, necessitating the use of inefficient and complex linear power amplifiers. Solutions to the high peak-to-mean envelope power ratio (PMEPR) problem include signal processing techniques such as clipping, peak windowing, and peak cancellation, as well as coding techniques, i.e. using codes to ensure that only those OFDM signals with low PMEPR are transmitted. It is well known that using codewords generated by mapping binary Golay complementary sequences into BPSK yields OFDM signals with low PMEPR. Frank, Sivaswamy, and o...

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Correction to &#8220 A New Construction of 16-QAM Golay Complementary Sequences&#8221

Tit, 2004

Two constructions of 16-QAM Golay complementary sequences

Proceedings IEEE International Symposium on Information Theory,

We present two constructions of 16-QAM Golay complementary sequences. The size of the set of cons... more We present two constructions of 16-QAM Golay complementary sequences. The size of the set of constructed sequences is (14 + 12m)(m!/2)4 m+1 . Of these, when employed in an OFDM system, (m!/2)4 m+1 sequences have PMEPR (peak to mean envelope power ratio) bounded above by 3.6, three subsets of size (4 + 4m)(m!/2)4 m+1 contain sequences having PMEPRs less than of 2.8, 2.0, and 1.2 respectively, and a subset of size (m!/2)4 m+1 contains sequences that have PMEPR upperbounded by 0.4.

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Correction to “A New Construction of 16-QAM Golay Complementary Sequences&#8221

IEEE Transactions on Information Theory, 2004

We present a new construction of 16-QAM Golay sequences of length = 2 . The number of constructed... more We present a new construction of 16-QAM Golay sequences of length = 2 . The number of constructed sequences is (14 + 12 )( ! 2)4 +1 . When employed as a code in an orthogonal frequency-division multiplexing (OFDM) system; this set of sequences has a peak-to-mean envelope power ratio (PMEPR) of 3 6. By considering two specific subsets of these sequences, we obtain new codes with PMEPR bounds of 2 0 and 2 8 and respective code sizes of (2 + 2 )( ! 2)4 +1 and (4 + 4 )( ! 2)4 +1 . These are larger than previously known codes for the same PMEPR bounds.

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A new construction of 16-QAM golay complementary sequences

IEEE Transactions on Information Theory, 2003

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On iterative decoding in some existing systems

IEEE Journal on Selected Areas in Communications, 2001

Iterative decoding is used to achieve backward compatible performance improvement in several exis... more Iterative decoding is used to achieve backward compatible performance improvement in several existing systems. Concatenated coding and iterative decoding are first set up using composite mappings, so that various applications in digital communication and recording can be described in a concise and uniform manner. An ambiguity zone detection (AZD) based iterative decoder, operating on generalized erasures, is described as an alternative for concatenated systems where turbo decoding cannot be performed. Described iterative decoding techniques are then applied to selected wireless communication and digital recording systems. Simulation results and utilization of decoding gains are briefly discussed.

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A simple encodable/decodable OFDM QPSK code with low peak-to-mean envelope power ratio

IEEE Transactions on Information Theory, 2001

... Envelope Power Ratio Chan Vee Chong, Student Member, IEEE, and Vahid Tarokh, Member, IEEE Abs... more

Quadrature amplitude modulated codes with low peak-to-mean envelope power ratio for orthogonal frequency division multiplexing applications

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Correction to &#8220 A New Construction of 16-QAM Golay Complementary Sequences&#8221

Tit, 2004

Two constructions of 16-QAM Golay complementary sequences

Proceedings IEEE International Symposium on Information Theory,

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Correction to “A New Construction of 16-QAM Golay Complementary Sequences&#8221

IEEE Transactions on Information Theory, 2004

Download

A new construction of 16-QAM golay complementary sequences

IEEE Transactions on Information Theory, 2003

Download

On iterative decoding in some existing systems

IEEE Journal on Selected Areas in Communications, 2001

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A simple encodable/decodable OFDM QPSK code with low peak-to-mean envelope power ratio

IEEE Transactions on Information Theory, 2001

... Envelope Power Ratio Chan Vee Chong, Student Member, IEEE, and Vahid Tarokh, Member, IEEE Abs... more

Chan Vee Chong

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