Performance evaluation of modified HPSK for wideband CDMA

Author

Yamazato, Takaya ; Fujiwara, Akihiro ; Katayama, Masaaki ; Ogawa, Akira

Author_Institution

Center for Inf. Media Studies, Nagoya Univ., Japan

Volume

2

fYear

2000

fDate

2000

Firstpage

751

Abstract

In mobile communications, power is a very important factor and non-linear amplification of the power amplifier cannot be avoided due to their high power efficiency. An HPSK (hybrid phase shift keying) modulation scheme has been proposed as the spreading technique for W-CDMA and cdma2000. HPSK is a complex spreading scheme that is designed to minimize the zero-crossing signal transition. However, there is a possibility that signal transition of HPSK go through zero. We propose a new modulation scheme for W-CDMA and cdma2000. The scheme is based on HPSK, but we modified the complex scrambling to avoid zero-crossing. We call it as modified HPSK (m-HPSK). It is shown that m-HPSK outperforms HPSK in the presence of non-linear amplification

Keywords

broadband networks; code division multiple access; land mobile radio; multiuser channels; phase shift keying; power amplifiers; radio networks; radiofrequency amplifiers; spread spectrum communication; BER; HPSK modulation; W-CDMA; cdma2000; high power efficiency; hybrid phase shift keying; m-HPSK; mobile communications; mobile handset; modified HPSK; nonlinear amplification; performance evaluation; power amplifier; spreading technique; wideband CDMA; zero-crossing signal transition minimisation; Bandwidth; Batteries; Bit error rate; High power amplifiers; Multiaccess communication; Nonlinear distortion; Power amplifiers; Quadrature phase shift keying; Signal design; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on

Conference_Location

Parsippany, NJ

Print_ISBN

0-7803-6560-7

Type

conf

DOI

10.1109/ISSSTA.2000.876535

Filename

876535