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AN-1434

National Semiconductor
Part Number AN-1434
Manufacturer National Semiconductor
Description Crest Factor Invariant RF Power Detector
Published Apr 7, 2011
Detailed Description Crest Factor Invariant RF Power Detector Crest Factor Invariant RF Power Detector Introduction Over the past few years ...
Datasheet PDF File AN-1434 PDF File

AN-1434
AN-1434

Overview
Crest Factor Invariant RF Power Detector Crest Factor Invariant RF Power Detector Introduction Over the past few years cellular phone system have made a major transition from power efficient digital modulation schemes to bandwidth efficient digital modulation techniques.
This is because new cellular phone systems need to provide a high transmission rate capability to satisfy the needed broadband applications.
Power efficiency modulation schemes provides reliable transmission of information in a communications system at the lowest practical power level.
One of the very successful examples is the GSM/GPRS network.
The binary signaling GMSK modulation is used in the GSM/GPRS network.
A bandwidth efficient modulation scheme delivers a higher data rate within a limited spectrum bandwidth.
All the initial phases of 3G networks take advantage of this kind of modulation.
A Sixteenth-ary Quadrature Amplitude Modulation (16QAM) scheme is even used in the latest High Speed Downlink Packet Access...


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