TY - GEN
T1 - Exploiting common mode signals for FEXT cancellation in upstream VDSL
AU - Kumar, Arun
AU - Zafaruddin, S. M.
AU - Prakriya, Shankar
AU - Prasad, Surendra
PY - 2008
Y1 - 2008
N2 - In this paper, we study the utility of the Common Mode (CM) signal for Far End Crosstalk (FEXT) cancellation in upstream Very high-speed Digital Subscriber Line (VDSL). We begin by extending the stochastic channel model developed for Differential Mode (DM) signals to model the channels of both CM and DM signals. The characteristics of the resulting CM-DM joint channel are first studied. This is expected to help in the development of computationally efficient algorithms for FEXT cancellation. In [4], the capacity improvement with use of CM-DM was studied for the overall channel. The rate gain with CM-DM joint processing as compared to DM only processing is shown to be a strong function of frequency and the loop length, an observation that is of critical importance for development of FEXT cancellation algorithms. It is shown that such joint processing is beneficial for longer loops and for high frequency subcarriers.
AB - In this paper, we study the utility of the Common Mode (CM) signal for Far End Crosstalk (FEXT) cancellation in upstream Very high-speed Digital Subscriber Line (VDSL). We begin by extending the stochastic channel model developed for Differential Mode (DM) signals to model the channels of both CM and DM signals. The characteristics of the resulting CM-DM joint channel are first studied. This is expected to help in the development of computationally efficient algorithms for FEXT cancellation. In [4], the capacity improvement with use of CM-DM was studied for the overall channel. The rate gain with CM-DM joint processing as compared to DM only processing is shown to be a strong function of frequency and the loop length, an observation that is of critical importance for development of FEXT cancellation algorithms. It is shown that such joint processing is beneficial for longer loops and for high frequency subcarriers.
UR - http://www.scopus.com/inward/record.url?scp=63049129831&partnerID=8YFLogxK
U2 - 10.1109/indcon.2008.4768746
DO - 10.1109/indcon.2008.4768746
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AN - SCOPUS:63049129831
SN - 9781424427475
T3 - Proceedings of the INDICON 2008 IEEE Conference and Exhibition on Control, Communications and Automation
SP - 338
EP - 342
BT - Proceedings of the INDICON 2008 IEEE Conference and Exhibition on Control, Communications and Automation
PB - IEEE Computer Society
T2 - INDICON 2008 IEEE Conference and Exhibition on Control, Communications and Automation
Y2 - 11 December 2008 through 13 December 2008
ER -