Title :
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
fDate :
7/1/2001 12:00:00 AM
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;
Journal_Title :
Vehicular Technology, IEEE Transactions on
