Signal processing design for an ADSL high speed equalizer

Author

Jones, David C.

Author_Institution

Bellcore, Morristown, NJ, USA

fYear

1994

fDate

1-5 May 1994

Firstpage

283

Abstract

An asymmetric digital subscriber line (ADSL) is an emerging technology for the transport of video services or other asymmetric high bit-rate services over the copper local loop plant. This paper describes the design and implementation of a high speed equalizer for an ADSL research prototype. This equalizer contains two complex adaptive 32-tap equalizers, and is capable of processing QAM or carrierless amplitude/phase (CAP) modulation signals up to 1 MBaud in speed. Implementation is via off-the-shelf fixed and programmable DSPs, with a resulting throughput in excess of 300 MIPS. Experimental results are presented indicating a reach of 18 kft of twisted copper pair for the system

Keywords

amplitude modulation; equalisers; phase modulation; signal processing; subscriber loops; visual communication; 18000 feet; 300 MIPS; ADSL; CAP signals; QAM signals; asymmetric digital subscriber line; asymmetric high bit-rate services; carrierless amplitude/phase modulation; complex adaptive 32-tap equalizers; copper local loop plant; experimental results; high speed equalizer; programmable DSP; signal processing design; throughput; twisted copper pair; video services; Copper; DSL; Equalizers; Phase modulation; Process design; Prototypes; Quadrature amplitude modulation; Signal design; Signal processing; Video signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1994. ICC '94, SUPERCOMM/ICC '94, Conference Record, 'Serving Humanity Through Communications.' IEEE International Conference on

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-1825-0

Type

conf

DOI

10.1109/ICC.1994.369044

Filename

369044