Demodulator quantization of coded OOK FSO systems over atmospheric turbulence channels

Author

Runge, Cristhof J. R. ; Portugheis, Jaime

Author_Institution

Sch. of Technol., State Univ. of Campinas, Campinas, Brazil

fYear

2015

fDate

14-17 June 2015

Firstpage

1

Lastpage

4

Abstract

This paper addresses a practical aspect of coded on-off keying free-space optical communication systems: quantization of demodulator outputs in receiver. Receivers with and without knowledge of channel state information (CSI) are considered. Proposed quantization schemes for soft decision decoding with CSI are uniform with quantization intervals proportional to channel gains. The schemes are studied and compared under the criterion of the cut-off rate of the discrete channel created by quantization.

Keywords

amplitude shift keying; channel coding; decoding; demodulators; optical communication; optical receivers; quantisation (signal); CSI; atmospheric turbulence channels; channel gains; channel state information; coded OOK FSO systems; coded on-off keying free-space optical communication systems; cut-off rate; demodulator outputs quantization; discrete channel; quantization intervals; receiver; soft decision decoding; Decoding; Demodulation; Indexes; Probability density function; Quantization (signal); Receivers; Signal to noise ratio; Channel Coding; Channel State Information; Free-Space Optical Systems; Receiver Quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications (IWT), 2015 International Workshop on

Conference_Location

Santa Rita do Sapucai

Type

conf

DOI

10.1109/IWT.2015.7224567

Filename

7224567