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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hidaka, Y. Weixin Gai Horie, T. Jian Hong Jiang Koyanagi, Y. Osone, H. |
| Copyright Year | 2009 |
| Description | Author affiliation: Fujitsu Laboratories of America, Sunnyvale, CA, USA (Hidaka, Y.; Weixin Gai; Jian Hong Jiang; Osone, H.) || Fujitsu Laboratories, Kawasaki, Japan (Horie, T.; Koyanagi, Y.) |
| Abstract | Maximum baud rate of electrical signaling over backplanes is limited by reflection and crosstalk noise at connectors as well as ISI caused by frequency-dependent dielectric loss. A DFE is an effective circuit to alleviate ISI without amplifying noise. A multi-tap DFE is often used in order to cancel long-tail ISI [1–3]. However, multiple DFE taps may limit maximum operation speed due to analog feedback when using non-speculative taps [1,2], or increase power and area exponentially when using multiple speculative taps [3]. Another approach is a combination of a 1-tap speculative DFE to get faster speed and a linear equalizer (LE) to cancel the long-tail ISI [4,5]. Adaptive control is challenging when combining LE and DFE, because the relationship between LE and DFE must be taken into account [5], and the sign-sign-least-mean-square (SS-LMS) algorithm [7] that is commonly used in DFEs is not applicable to some types of LE, or at the cost of increased power and area for parallel signal paths in LE [6]. The zero-forcing (ZF) algorithm for analog filters [8] is applicable to any type of LE, but it needs an ADC and a large amount of logic to perform matrix multiplication. A heuristic algorithm [5] requires an eye measurement circuit, microcontroller, and control software. |
| File Size | 805724 |
| File Format | |
| ISBN | 9781424434589 |
| DOI | 10.1109/ISSCC.2009.4977371 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-02-08 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Backplanes Transceivers Adaptive control Intersymbol interference Decision feedback equalizers Filters Fingers Bit error rate Character generation Voltage |
| Content Type | Text |
| Resource Type | Article |
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