Scalar Quantizers with Uniform Encoders and Channel-Optimized Decoders for M-PSK Schemes

Author

Qiao, Dengyu ; Mow, Wai Ho ; Leung, Chi-sing

Author_Institution

Shenzhen Institutes of Adv. Technol., Chinese Acad. of Sci., Shenzhen, China

fYear

2010

fDate

6-10 Dec. 2010

Firstpage

1

Lastpage

5

Abstract

In this paper, the problem of index assignments for quantizers with uniform encoders and channel-optimized decoders for M-PSK schemes is studied. The analytical expressions of MSD (Mean-Squared Distortion) for such quantizers with the natural, zigzag and NBC-Gray mappings, respectively, have been derived. An interesting result is that at a wide range of MSD levels, the zigzag mapping can offer a significant gain in SNR over the other two mappings when used in such quantizers, especially when the alphabet size M gets larger, which is agreed by simulation results.

Keywords

channel coding; decoding; distortion; phase shift keying; quantisation (signal); M-PSK schemes; NBC-Gray mappings; SNR; channel-optimized decoders; index assignments; mean-squared distortion; scalar quantizers; uniform encoders; zigzag mapping; Decoding; Encoding; IEEE Communications Society; Indexes; Quantization; Signal to noise ratio; Simulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE

Conference_Location

Miami, FL

ISSN

1930-529X

Print_ISBN

978-1-4244-5636-9

Electronic_ISBN

1930-529X

Type

conf

DOI

10.1109/GLOCOM.2010.5683746

Filename

5683746