Capacity of AM-PSK on partially coherent fading channels

Author

Belzer, Benjamin J. ; Risley, Allen D. ; Hou, Ping ; Fischer, Thomas R.

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA

Volume

50

Issue

3

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

369

Lastpage

373

Abstract

This paper presents numerical capacity curves for two discrete complex channels: (1) a slow-fading Rayleigh channel with discrete carrier tracking by a phase-locked loop (PLL), where the PLL SNR is proportional to the fading amplitude squared, and (2) a fast-fading Rician channel with carrier phase estimation for the line-of-sight path only. Both channel models assume independent fading of successively received symbols. Capacity calculations are performed for equiprobable signaling with 8-ary and 16-ary amplitude-modulated phase-shift-keyed (AM-PSK) constellations. On the Rayleigh channel, the AM-PSK constellations give gains between 2 and 9 dB over PSK, at SNRs between 5 and 40 dB. For the Rician channel, AM-PSK gives a capacity gain over PSK of up to 0.75 bit at high SNR

Keywords

Rayleigh channels; Rician channels; amplitude modulation; channel capacity; phase estimation; phase locked loops; phase shift keying; 16-ary amplitude-modulated phase-shift-keying; 8-ary amplitude-modulated phase-shift-keying; AM-PSK capacity; AM-PSK constellations; PLL SNR; PSK; capacity gain; carrier phase estimation; channel models; discrete carrier tracking; discrete complex channels; equiprobable signaling; fading amplitude; fast-fading Rician channel; high SNR; independent fading; line-of-sight path; partially coherent fading channels; phase-locked loop; slow-fading Rayleigh channel; Channel capacity; Constellation diagram; Fading; Hardware; Phase locked loops; Phase shift keying; Quadrature amplitude modulation; Rayleigh channels; Rician channels; Turbo codes;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.990896

Filename

990896