Title :
Statistical characterization of RF power amplifier efficiency for CDMA wireless communication systems
Author_Institution :
QUALCOMM Inc., San Diego, CA, USA
Abstract :
Power amplifier (PA) efficiency for wireless communication systems is universally calculated at maximum output power. While this method has evolved into the de-facto efficiency figure-of-merit, it ignores the system effect on the average output power, and cannot in general provide an accurate estimate of the PA impact on phone talk-time. A more meaningful efficiency estimate is its long-term mean based on the statistics of the phone output power in a typical environment. This new efficiency characterization method provides an improved estimate of the PA impact on phone talk-time by including the efficiency variation of the PA output power, not the maximum average output power. A summary of the new efficiency characterization method is given, with two examples each for the IS-95 CDMA system and the AMPS system
Keywords :
cellular radio; code division multiple access; power amplifiers; radiofrequency amplifiers; statistical analysis; telecommunication channels; AMPS system; CDMA wireless communication systems; IS-95 CDMA system; RF power amplifier efficiency; average output power; long-term mean; maximum output power; phone output power statistics; phone talk-time; statistical characterization; wireless communication systems; Costs; Distribution functions; Gallium arsenide; Multiaccess communication; Power amplifiers; Power distribution; Power generation; Radio frequency; Radiofrequency amplifiers; Wireless communication;
Conference_Titel :
Wireless Communications Conference, 1997., Proceedings
Conference_Location :
Boulder, CO
Print_ISBN :
0-7803-4194-5
DOI :
10.1109/WCC.1997.622258
