RF Power Amplifiers for Wireless Communications, Second Edition (Artech House Microwave Library (Hardcover))
Iterative bandwidth limitation for high efficiency EER power amplifier
ISWPC'09 Proceedings of the 4th international conference on Wireless pervasive computing
A potential transmitter architecture for future generation green wireless base station
EURASIP Journal on Wireless Communications and Networking - Special issue on enabling Wireless Technologies for Green Pervasive Computing
An overview of peak-to-average power ratio reduction techniques for multicarrier transmission
IEEE Wireless Communications
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High efficiency and linearity can be achieved using Kahn's envelope elimination and restoration (EER) technique. However, when used with modulation schemes such as code division multiple access (CDMA) and orthogonal frequency division multiplexing (OFDM), the resulting polar drive signals suffer from expanded bandwidth. Rudolph has shown that the bandwidth of the polar drive signals can be reduced by hole punching the signal in the phase plane (limiting the minimum envelop of the modulated signal). This paper theoretically analyses the hole punch method and quantifies adjacent channel interference (ACI) and the error vector magnitude (EVM) caused by the ensuing distortion. It also shows how the results differ using different shapes and lengths of window functions. Although the hole punch process manages to achieve spectrum improvement for polar components, its EVM will limit the data throughput in some wireless standards.