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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/16488
Title: Efficiency enhancement in delta-sigma modulator based transmitter using level transformation
Authors: Kumar N.
Rawat, Karun
Published in: Proceedings of IEEE MTT-S International Microwave and RF Conference, IMaRC 2017
Abstract: This paper proposes a new architecture of delta-sigma modulator (DSM) based transmitter for addressing the key limitation of multi-level DSM. The performance of multi-level DSM deteriorates at the RF amplification stage due to increase in peak to average power ratio (PAPR) of quantized signal as the number of quantization level increases. In this paper, a level transformation stage is introduced after DSM which significantly improves the transmitter efficiency in comparison to multi-level DSM. This novel topology is validated using 3 to 2 level and 5 to 3 level signal transformation which possess the advantage of multilevel signal at DSM stage along with the benefit of low PAPR signal at amplification stage. The implementation result shows that coding efficiency is improved by 5.6% in 3to2 level and 14.3% in 5to3 level signal transformation in comparison to 2 level and 3 level DSM based transmitter respectively. © 2017 IEEE.
Citation: Proceedings of IEEE MTT-S International Microwave and RF Conference, IMaRC 2017, (2018), 73- 76
URI: https://doi.org/10.1109/IMaRC.2017.8449697
http://repository.iitr.ac.in/handle/123456789/16488
Issue Date: 2018
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: coding efficiency
Delta-sigma modulator
FPGA
peak to average power ratio
Switched mode power amplifier
ISBN: 9.78E+12
Author Scopus IDs: 57199419144
57000644800
Author Affiliations: Kumar, N., Indian Institute of Technology Roorkee, Department of Electronics and Communication, Roorkee, India
Rawat, K., Indian Institute of Technology Roorkee, Department of Electronics and Communication, Roorkee, India
Funding Details: ACKNOWLEDGMENT The authors acknowledge SERB Grant No. SB/EECE/047/2014 and University Grants Commission (UGC), India for their support. Authors would also like to acknowledge all the members of IRdsp and Dr. Meenakshi Rawat for their help in measurement setup.
Appears in Collections:Conference Publications [ECE]

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