Title :
Constrained Partial Response Receivers for High-Speed Links
Author :
Ahmadi, Mahmoud Reza ; Moon, Jaekyun ; Harjani, Ramesh
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Minnesota, Minneapolis, MN
Abstract :
This paper presents an architecture and an optimization framework that uses partial response (PR) equalization for high-speed links. PR equalization is achieved through a combined use of linear transmit equalization and decision feedback equalization (DFE). This technique outperforms full-channel/impulse equalization for a wide range of channels in wireline communication. The constrained PR response equalization technique presented here improves eye openings, reduces the overall bit error rate, and reduces crosstalk impact for a large class of channels while maintaining a simple implementation. The new transceiver architecture proposed is particularly well suited for high-speed multichannel applications due to the mitigated DFE loop timing constraint. In comparison with duobinary equalization, the proposed PR architecture improves the eye height and eye width of the receiver by 28% and 10%, respectively, at 10 Gb/s and by 19% and 7%, respectively, at 15 Gb/s. The performance improvements in comparison to impulse equalization are even larger.
Keywords :
decision feedback equalisers; error statistics; optimisation; partial response channels; pulse amplitude modulation; constrained partial response receivers; crosstalk impact; decision feedback equalization; eye height; eye width; high-speed links; linear transmit equalization; optimization; overall bit error rate; pulse amplitude modulation; Amplitude modulation; Bit error rate; Crosstalk; Decision feedback equalizers; Impedance; Intersymbol interference; Moon; Pulse modulation; Throughput; Timing; Bit error rate (BER); decision feedback equalization (DFE); minimum mean-squared error (MMSE); partial response (PR); pulse amplitude modulation (2-PAM);
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2008.2001983