Computation of the continuous-time PAR of an OFDM signal with BPSK subcarriers

Author

Tellambura, C.

Author_Institution

Sch. of Comput. Sci. & Software Eng., Monash Univ., Clayton, Vic., Australia

Volume

5

Issue

5

fYear

2001

fDate

5/1/2001 12:00:00 AM

Firstpage

185

Lastpage

187

Abstract

A procedure for computing the continuous-time peak-to-average power ratio (PAR) of an orthogonal frequency-division multiplexing (OFDM) signal, with binary phase-shift keying (BPSK) subcarriers, is developed. It is shown that the instantaneous envelope power function (EPF) can be transformed into a linear sum of Chebyshev polynomials. Consequently, the roots of the derivative of EPF can be obtained by solving a polynomial. Using the procedure to evaluate the difference between the continuous-time and discrete-time PAR, it is shown that an oversampling factor of four is accurate.

Keywords

OFDM modulation; phase shift keying; polynomials; signal sampling; BPSK subcarriers; Chebyshev polynomials; OFDM signal; binary phase-shift keying; continuous-time PAR; discrete-time PAR; instantaneous envelope power function; linear sum; orthogonal frequency-division multiplexing; oversampling factor; peak-to-average power ratio; Binary phase shift keying; Chebyshev approximation; Digital TV; Frequency division multiplexing; OFDM; Peak to average power ratio; Phase shift keying; Polynomials; Sampling methods; TV broadcasting;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.922754

Filename

922754