Title :
Average of peak-to-average ratio (PAR) of IS95 and CDMA2000 systems-single carrier
Author :
Lau, Vincent K N
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
fDate :
4/1/2001 12:00:00 AM
Abstract :
Peak-to-average ratio (PAR) of a signal is an important parameter. It determines the input backoff factor of the amplifier to avoid clipping and spectral regrowth. We analyze and compose the PAR of the downlink signal for IS95 and the CDMA2000 single-carrier systems. It is found that the PAR of the transmitted signal depends on the Walsh code assignment. Furthermore, we found that the PAR of CDMA2000 signal is always lower than the IS95 signal. Finally, PAR control by Walsh code selection is proposed.
Keywords :
cellular radio; code division multiple access; codes; multiuser channels; radio links; CDMA2000 system; IS95 system; Walsh code; amplifier input backoff factor; cellular radio; downlink signal; peak-to-average ratio; single-carrier systems; transmitted signal; Distortion; Downlink; H infinity control; High power amplifiers; Histograms; Multiaccess communication; OFDM; Peak to average power ratio; Random processes; Signal analysis;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.917100
