4. A 28 Gb/s 560 mW Multi-Standard SerDes With SingleStage Analog Front-End and 14-Tap Decision Feedback Equalizer in 28 nm CMOS Kimura, H. ; Aziz, P.M. ; Tai Jing ; Sinha, A. ; Kotagiri, S.P. ; Narayan, R. ; Hairong Gao ; Ping Jing ; Hom, G. ; Anshi Liang ; Zhang, E. ; Kadkol, A. ; Kothari, R. ; Chan, G. ; Yehui Sun ; Ge, B. ; Zeng, J. ; Ling, K. ; Wang, M.C. ; Malipatil, A. ; Lijun Li ; Abel,...

The feasibility of a space-time decision feedback equalizer applied to the uplink of a 12.8 Mbit/s QPSK-system is demonstrated by means of link and system level simulations of real-world-like propagation and cell scenarios. Even for small antenna arrays of only 4 sensors an SDMA gain of 67% is achieved, i.e. 5 users per cell may be loaded to only 3 carrier frequencies. For scenarios with omnidi...

An all-digital 2-tap half-rate time-based decision feedback equalizer (TB-DFE) was demonstrated on a 10mm on-chip serial link. Implemented in a 65nm GP technology, the transmitter and receiver achieve an energy-efficiency of 31.9 and 45.3 fJ/b/mm, respectively, at a data rate of 10Gb/s. A Bit Error Rate (BER) less than 10-12 was verified for an eye width of 0.43 Unit Interval (UI) using an in-s...

In this paper, a blind sequence estimation algorithm based on interacting multiple model is introduced to estimate the channel and the transmitted sequence corrupted by ISI (intersymbol interference) and noise. The proposed algorithm avoids the exponential growth complexity caused by increasing channel memory length. The performance of the IMM (interacting multiple model) based equalizer is stu...

A markovian model of the error probability density for decision feedback equalizer is proposed and its application to the error propagation probability computation is derived. The model is a generalization of the Lütkemeyer and Noll model proposed in [1]. It is obtained by the analysis of the gaussian mixture distribution of the errors which follows a Markov Process. The analysis of this proces...

Adaptive modulation is applied in conjunction with a decision-feedback equalizer (DFE) in order to mitigate the effects of the slowly varying wide-band multipath Rayleigh fading channel in a noise-limited environment. An upper-bound mean bit-error rate and bits per symbol performance is introduced for this scheme by utilizing the pseudo signal-to-noise ratio at the output of the DFE in order to...

Most of the published theory on the optimal performance of decision-feedback equalization under the MMSE criterion addresses the transmission of i.i.d. symbol sequences only. This paper presents a theory which accommodates the case of correlated symbol sequences. It also considers the use of a fractionally spaced forward filter in the decision-feedback equalizer (DFE). Two limiting conditions a...

An importance sampling (IS) simulation technique, originally derived by Iltis for Bayesian equalizers, is extended to evaluate the lower-bound bit error rate of the Bayesian decision feedback equalizer (under the assumption of correct decisions being fed back. Using a geometric translation approach, it is shown that the two subsets of opposite-class channel states are always linearly separable....

The conventional decision feedback equalizer (DFE) separates the different signal classes using a single hyperplane. It is well known that the popular minimum mean square error (MMSE) design is generally not the optimal minimum bit error rate (MBER) solution. We propose a method of designing the separating hyperplane for the conventional DFE based on support vector machines (SVMs). The SVM desi...

A well–known receiver strategy for a linearly modulated signal transmitted over a frequency–selective channel is channel equalization. Recently it was proposed to employ a minimum mean–squared error (MMSE) channel equalizer for the downlink of CDMA. In this paper, we introduce a new receiver concept using MMSE channel equalization as a first stage and MMSE decision–feedback equalization (DFE) u...