Analysis of peak-to-average power ratio for IS-95 and third generation CDMA forward link waveforms

Author

Lee, Jhong Sam ; Miller, Leonard E.

Author_Institution

J.S. Lee Associates Inc., Potomac, MD, USA

Volume

50

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1004

Lastpage

1013

Abstract

The peak-to-average power ratio (PAR) of IS-95-type code division multiple-access (CDMA) forward link waveforms is an important parameter which directly relates to system capacity performance. In this paper, analytical expressions are derived for the PAR. The probability that the instantaneous-to-average power ratio (IAR) exceeds a given value is also derived. The analysis is carried out parametric in 1) the number of active traffic channels; 2) the fractions of power allocated to different forward link channels; and 3) other parameters related to the forward link power budget. An analysis is also given for the distribution of the IAR for the forward link modulation planned for third generation (3G) versions of the IS-95 system and a simple modification to present and future IS-95 modulation schemes is shown that reduces the forward link PAR by up to 3 dB

Keywords

cellular radio; code division multiple access; modulation; 3G; CDMA; IAR; IS-95; PAR; active traffic channels; code division multiple-access; forward link modulation; instantaneous-to-average power ratio; peak-to-average power ratio; power allocated; system capacity performance; third generation CDMA forward link waveforms; Baseband; Communication system control; Communication system signaling; Control systems; Multiaccess communication; Peak to average power ratio; Power generation; Telephony; Time varying systems; Wireless communication;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.938576

Filename

938576