A bit error probability analysis of a digital PLL based demodulator of differentially encoded BPSK and QPSK modulation

Author

Fitz, Michael P.

Author_Institution

Sch. of Electr. Eng., Purdue Univ., West Lafayette, IN, USA

Volume

42

Issue

1

fYear

1994

fDate

1/1/1994 12:00:00 AM

Firstpage

17

Lastpage

21

Abstract

Presents a bit error probability analysis of a digital phase-locked loop based demodulator, of differentially encoded BPSK and QPSK modulations. Differential decoding is a method of resolving a phase ambiguity, typical of fully modulated signals, that uses two consecutive demodulated symbols to estimate the information symbols. The effects of a noisy phase reference on demodulator performance are well documented for uncoded modulations (single symbol demodulation). The paper investigates performance for phase reference time variations between the two symbols. The time varying reference investigated is produced by a digital phase-locked loop. The noisy phase reference has negligible additional effect on the bit error probability for differentially encoded BPSK and QPSK

Keywords

decoding; demodulators; digital circuits; encoding; error statistics; phase shift keying; phase-locked loops; probability; time-varying systems; bit error probability analysis; consecutive demodulated symbols; differential decoding; differentially encoded BPSK modulation; differentially encoded QPSK modulation; digital PLL based demodulator; fully modulated signals; information symbols; noisy phase reference; phase ambiguity; phase reference time variations; time varying reference; Binary phase shift keying; Decoding; Demodulation; Digital modulation; Error analysis; Error probability; Phase locked loops; Phase modulation; Phase noise; Quadrature phase shift keying;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.275295

Filename

275295