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

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4 Author(s)
Itri, B.A. ; PairGain Technol. Inc., Torrance, CA, USA ; Brackert, R.H., Jr. ; Nicholas, H.T. ; Samueli, H.

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

Published in:

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

Date of Conference:

22-24 May 1991

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