Performance Improvement in BER and PAPR Reduction in OFDM System Using Companding Technique

Most radio system employ High Power AmplifierS (HPAS) in the transmitter to obtain sufficient transmit power for the purpose of delivering the maximum output power efficiency, the HPA is usually operated at or near the saturation region, of HPA is very sensitive to variation in signal amplitude. Unfortunately the variation of OFDM signal amplitude is very wide with large Peak to Average Power Ratio (PAPR). This high PAPR reduces the resolution of the Digital to Analog (D/A) and Analog to Digital (A/D) converts in the transmitter and receiver and require sophisticated (expensive) radio transmitter with their high power amplifier operating in a very large linear range.

Provided by: International Journal of Application or Innovation in Engineering & Management (IJAIEM) Topic: Mobility Date Added: Jan 2013 Format: PDF

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