Binary power amplifier with 2-bit sigma-delta modulation method for EER transmitter

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A novel power amplifier for a polar transmitter is proposed to achieve better spectral performance for a wideband envelope signal. In the proposed scheme, 2-bit sigma-delta (Sigma Delta) modulation of the envelope signal is introduced, and the power amplifier configuration is modified in a binary form to accommodate the 2-bit digitized envelope signals. The 2-bit Sigma Delta modulator lowers the noise of the envelope signal by fine quantization and thus enhances the spectral property of the RF signal. The Ptolemy simulation results of the proposed structure show that the spectral noise is reduced by 10 dB in a full transmit band of the EDGE system. The dynamic range is also enhanced. Since the performance is improved without increasing the over-sampling ratio, this technique is best suited for wireless communication with high data rates.
Publisher
ELECTRONICS TELECOMMUNICATIONS RESEARCH INST
Issue Date
2008-06
Language
English
Article Type
Article
Citation

ETRI JOURNAL, v.30, no.3, pp.377 - 382

ISSN
1225-6463
URI
http://hdl.handle.net/10203/92484
Appears in Collection
EE-Journal Papers(저널논문)
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