Title :
Signal processing design for an ADSL high speed equalizer
Author_Institution :
Bellcore, Morristown, NJ, USA
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;
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
DOI :
10.1109/ICC.1994.369044
