High-Throughput and Improved-Convergent Design of Pipelined Adaptive DFE for 5G Communication

• Published in: IEEE transactions on circuits and systems. II, Express briefs Vol. 68; no. 2; pp. 652 - 656
• Main Authors: Khan, Mohd. Tasleem, Shaik, Rafi Ahamed
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-02-2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 5G mobile communication; Adaptive DFE (ADFE); Adaptive systems; Communications systems; Convergence; Decision feedback equalizers; Feedback; look up table (LUT); Lookup tables; Multiplexing; new-radio (NR); pipelining; Quadrature amplitude modulation; Table lookup; Throughput; two-stage pre-computation (TSP)
• ISSN: 1549-7747; 1558-3791
• DOI: 10.1109/TCSII.2020.3018637

This brief presents a high-throughput and improved convergent design of pipelined adaptive decision feedback equalizer (ADFE) for 5G communication system. The proposed ADFE design achieves 3.3 Gbps for 4-quadrature amplitude modulation (4-QAM) and 8th order feedback filter (FBF). A novel look-up table update scheme for M-ary QAM ADFE is proposed. Further, we present an efficient quantization scheme for the proposed design. Theoretical derivations and simulation results confirm that the convergence performance of the proposed ADFE is superior. For instance, the proposed design for 16-QAM and 16th order FBF takes 167 less iterations and improves 4.03 dB error performance, while it provides nearly 8.96 times higher throughput as compared to the best existing design.