Bounds on the capacity of the blockwise noncoherent APSK-AWGN channels

Author

Cunha, Daniel C. ; Portugheis, Jaime

Author_Institution

Dept. of Commun., State Univ. of Campinas

fYear

2005

fDate

4-9 Sept. 2005

Firstpage

627

Lastpage

630

Abstract

Capacity of M-ary amplitude and phase-shift keying (M-APSK) over an additive white Gaussian noise (AWGN) channel that also introduces an unknown carrier phase rotation is considered. The phase remains constant over a block of L symbols and it is independent from block to block. Aiming to design codes with equally probable symbols, uniformly distributed channel inputs are assumed. Based on results of Peleg and Shamai for M-ary phase shift keying (M-PSK) modulation, easily computable upper and lower bounds on the effective M-APSK capacity are derived. For moderate M and L and a broad range of signal-to-noise ratios (SNR´s), the bounds come close together. As in the case of M-PSK modulation, for large L the coherent capacity is approached

Keywords

AWGN channels; amplitude shift keying; channel capacity; phase shift keying; M-ary amplitude shift keying; M-ary phase-shift keying; additive white Gaussian noise channel; blockwise noncoherent APSK-AWGN channels; carrier phase rotation; signal-to-noise ratios; AWGN channels; Additive white noise; Amplitude modulation; Channel capacity; Constellation diagram; Phase modulation; Phase shift keying; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory, 2005. ISIT 2005. Proceedings. International Symposium on

Conference_Location

Adelaide, SA

Print_ISBN

0-7803-9151-9

Type

conf

DOI

10.1109/ISIT.2005.1523411

Filename

1523411