Soft Metrics and EXIT Chart Analysis of Noncoherent MFSK with Diversity Reception in Rician Fading Channel

Author

Ahmed, Sohail

Author_Institution

Nat. Univ. of Sci. & Technol. (NUST), Islamabad, Pakistan

Volume

10

Issue

6

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

1692

Lastpage

1696

Abstract

A convolutionally encoded noncoherent M-ary Frequency Shift Keying (MFSK) modulation scheme with diversity reception is considered. Soft metrics for Soft Decision Decoding (SDD) of noncoherent MFSK are derived assuming Rician channel model. Furthermore, the convergence behavior of the MFSK receiver is investigated using EXtrinsic Information Transfer (EXIT) charts. It has been demonstrated that the derived expressions for soft information are useful allowing SDD of the MFSK scheme exploiting diversity and the EXIT chart analysis provides useful insights into its iterative decoding behavior.

Keywords

Rician channels; channel coding; convolutional codes; diversity reception; frequency shift keying; iterative decoding; EXIT chart analysis; Rician fading channel; SDD; convergence behavior; convolutionally encoding; diversity reception; extrinsic information transfer charts; iterative decoding behavior; noncoherent M-ary frequency shift keying modulation scheme; noncoherent MFSK receiver; soft decision decoding; soft information; soft metrics; Decoding; Demodulation; Diversity reception; Measurement; Receivers; Rician channels; EXIT chart; MFSK; diversity; iterative decoding;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.032411.100499

Filename

5740633