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Novel Distortion Compensation Scheme for Multichannel Direct RF Digitization Receiver

Vu, N.-A. and Le, H.-N. and Tran, T.-H.-T. and Trinh, Q.-K. (2019) Novel Distortion Compensation Scheme for Multichannel Direct RF Digitization Receiver. In: 19th International Symposium on Communications and Information Technologies, ISCIT 2019, 25 September 2019 through 27 September 2019.

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Abstract

This paper presents the analysis of the nonlinear distortion model of Low Noise Amplifier (LNA) for direct RF digitization receivers (DRF-RX) and proposes a novel compensation technique for receivers working in multi-channel mode1. With the proposed design the distortion is suppressed by using a linear reference receiver with a least mean square (LMS) filter. As the major advantage, the distortion suppression is performed after the down-converter so all high-order distortion components are automatically phased out. Furthermore, as the signal is fully processed at a low sampling rate, our proposed scheme is much simpler and the circuit inherently consumes less energy and is more compact, compared to the prior arts.To demonstrate the proposed technique, a direct RF digitization UHF receiver with QPSK modulation has been built and modeled in Matlab. The simulation results show that we could achieve an improvement of ~30 dB in signal SFDR (Spurious-free dynamic range) with the standard two-tone test case, and a reduction of 1000 times in the bit-error-rate (BER) in comparison with the non-compensation receiver. © 2019 IEEE.

Item Type: Conference or Workshop Item (Paper)
Divisions:
Faculties > Faculty of Radio-Electronic Engineering
Identification Number: 10.1109/ISCIT.2019.8905213
Uncontrolled Keywords: Bit error rate; Digital radio; Distortion (waves); Error compensation; MATLAB; Radio transceivers; Software radio; Digital receivers; LMS filter; Multi-channel receivers; RF digitizations; Software-defined radios; UHF transceiver; Low noise amplifiers
Additional Information: Conference code: 155066. Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/9270

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