RF Power Amplifiers for Wireless Communications, Second Edition (Artech House Microwave Library (Hardcover))
Spectral Regrowth Reduction for Digital Audio Broadcasting Using EER Amplifiers
CNSR '08 Proceedings of the Communication Networks and Services Research Conference
An overview of peak-to-average power ratio reduction techniques for multicarrier transmission
IEEE Wireless Communications
A technique to reduce phase/frequency modulation bandwidth in a polar RF transmitter
IEEE Transactions on Circuits and Systems Part I: Regular Papers
Theoretical analysis of hole punch signal conditioning for high efficiency EER power amplifiers
EURASIP Journal on Wireless Communications and Networking
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Kahn's Envelope Elimination and Restoration (EER) architecture can achieve high efficiency and linearity, but suffers from expanded bandwidth of polar drive signals when used with modern modulation schemes such CDMA and Orthogonal Frequency Division Multiplexing (OFDM). This paper proposes a new technique which uses iterative bandwidth limitation to reduce the bandwidth expansion of the polar drive signals. The technique reduces bandwidth expansion with the cost of Error Vector magnitude (EVM) buildup and spectral splatter. The paper also shows that further improvement in bandwidth reduction can be achieved using well known Partial Transmit Sequence (PTS) method to select the signal with the maximum bandwidth limitation and quantifies the EVM for the proposed schemes.