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January 2006 [Test & Measurement] Test Handset PA Phase And Amplitude Vs. Time Amplifier reuse is a common way for mobile communications designers to reduce manufacturing material costs to a minimum as they develop new networks. For example, the same power amplifier (PA) developed for GSM and GPRS is also be used for EGPRS applications. Unlike GSM and GPRS, however, EGPRS is sensitive to PA nonlinearities, which can significantly and negatively affect the performance of an EGPRS handset. To use a GSM PA for EGPRS, developers must add calibration factors to compensate... |
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