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Interleaving delay reduction in DSL transmission.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Interleaving delay reduction in DSL transmission.
作者:	Toumpakaris, Dimitrios-Alexandros.
面頁冊數:	157 p.
附註:	Adviser: John M. Cioffi.
附註:	Source: Dissertation Abstracts International, Volume: 64-09, Section: B, page: 4541.
Contained By:	Dissertation Abstracts International64-09B.
標題:	Engineering, Electronics and Electrical.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3104162
ISBN:	0496517309

Interleaving delay reduction in DSL transmission.
Toumpakaris, Dimitrios-Alexandros.

Interleaving delay reduction in DSL transmission. [electronic resource] - 157 p.

Adviser: John M. Cioffi.

Thesis (Ph.D.)--Stanford University, 2003.

Digital Subscriber Loop (DSL) systems achieve broadband transmission through the copper pairs traditionally used for voiceband communication. Reliable operation depends on sophisticated designs that shield the systems from stationary and non-stationary disturbers. In order to cope with non-stationary interference, comprised of impulse noise and Radio Frequency Ingress (RFI), current DSL systems employ a Forward Error Correction (FEC) scheme consisting of a Reed-Solomon code and interleaving. However, this results in increased end-to-end delay that affects the data throughput. As the demand for broadband services increases, the end-to-end delay becomes an important limiting factor of the systems performance.

ISBN: 0496517309Subjects--Topical Terms:

226981
Engineering, Electronics and Electrical.

Interleaving delay reduction in DSL transmission.
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520 # $a Digital Subscriber Loop (DSL) systems achieve broadband transmission through the copper pairs traditionally used for voiceband communication. Reliable operation depends on sophisticated designs that shield the systems from stationary and non-stationary disturbers. In order to cope with non-stationary interference, comprised of impulse noise and Radio Frequency Ingress (RFI), current DSL systems employ a Forward Error Correction (FEC) scheme consisting of a Reed-Solomon code and interleaving. However, this results in increased end-to-end delay that affects the data throughput. As the demand for broadband services increases, the end-to-end delay becomes an important limiting factor of the systems performance.
520 # $a This study focuses on reducing the interleaving delay of DSL systems subject to non-stationary interference. First, the nature and the effect of impulse noise on DSL systems is presented, as well as the trade-off between user rate and delay that is created by the FEC scheme. Moreover, it is explained how the effect of non-stationary interference on DSL systems can be evaluated analytically and by simulation. It is then shown that the trade-off currently in place in DSL systems can be substantially improved by taking advantage of the increased correction capability of Reed-Solomon codes when erasure decoding is implemented. This improvement can be obtained without changing the transmitter structure, and with no impact on the user rate. It is demonstrated how erasures can be chosen by employing one of three byte-erasure methods. The methods can be used in both single-carrier and multi-carrier systems. The performance of a DMT-VDSL system that uses the proposed erasure methods is evaluated by simulation. It is verified that, if protection against all noise impulses is required, the interleaving delay can be reduced by a factor of two compared to that of current systems.
520 # $a When both impulse noise and RFI are present, the interleaving delay needs to be increased further in order to ensure reliable operation. It is demonstrated that the principles used by the erasure methods can be extended to assist digital cancellation of RFI appearing on frequencies used by a DMT-DSL system, and therefore reduce the delay of systems that are subject to both impulse noise and RFI.
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