A transceiver for 800 kb/s full-duplex transmission over digital subscriber loops using a custom VLSI adaptive filter processor

Author

Itri, Benedict A. ; Brackert, Ralph H., Jr. ; Nicholas, Henry T., III ; Samueli, Henry

Author_Institution

PairGain Technol. Inc., Torrance, CA, USA

fYear

1991

fDate

22-24 May 1991

Firstpage

252

Lastpage

256

Abstract

Presents the design of a bidirectional 800 kb/s transceiver the enables data transmission for T1 services over unconditioned telephone wire facilities. The transceiver transmits a 4-level PAM line code (2B1Q) and uses a baud-spaced sampled receiver. The DSP-based transceiver utilizes a custom CMOS VLSI 64-tap LMS adaptive filter chip to provide echo cancellation and decision-feedback equalization. Error-free full-duplex transmission is achieved over 16 kft. of 24 AWG cable or 12 kft. of 26 AWG cable

Keywords

CMOS integrated circuits; VLSI; adaptive filters; echo suppression; equalisers; subscriber loops; transceivers; 800 kbit/s; AWG cable; CMOS; LMS adaptive filter chip; T1 services; baud-spaced sampled receiver; custom VLSI adaptive filter processor; data transmission; decision-feedback equalization; digital subscriber loops; echo cancellation; four-level PAM line code; full-duplex transmission; transceiver; unconditioned telephone wire facilities; Adaptive filters; CMOS technology; Clocks; Computer architecture; DSL; Decision feedback equalizers; Echo cancellers; Finite impulse response filter; Intersymbol interference; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Technology, Systems, and Applications, 1991. Proceedings of Technical Papers, 1991 International Symposium on

Conference_Location

Taipei

ISSN

1524-766X

Print_ISBN

0-7803-0036-X

Type

conf

DOI

10.1109/VTSA.1991.246671

Filename

246671