Optimal transmit spectra for communication in the presence of crosstalk

Author

Gaikwad, Rohit V. ; Baraniuk, Richard G.

Author_Institution

Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA

fYear

1999

fDate

6-10 Jun 1999

Firstpage

101

Lastpage

105

Abstract

We present a general framework for designing optimal transmit spectra for symmetric bit rate communication services dominated by crosstalk, in particular digital subscriber line (DSL) services such as the proposed HDSL2. Using the channel, noise, and interference transfer functions, we set up and solve an optimization problem to maximize the joint capacity of neighboring lines. Joint signaling techniques and optimal power distribution yield significant gains in bit rates (or performance margins) over current schemes. Furthermore, by design, the spectra are spectrally compatible with existing neighboring services. The framework is quite general-it does not depend on the exact choice of modulation scheme, for example. It is also extremely simple and of low computational complexity

Keywords

crosstalk; digital subscriber lines; interference (signal); noise; optimisation; signal synthesis; spectral analysis; telecommunication signalling; transfer functions; HDSL2; bit rates; channel transfer function; crosstalk; digital subscriber line services; interference transfer function; joint capacity; joint signaling techniques; low computational complexity; modulation scheme; noise transfer function; optimal power distribution; optimal transmit spectra design; optimization problem solution; performance margins; symmetric bit rate communication services; Bit rate; Central office; Crosstalk; DSL; Frequency; Interference; Modems; Power distribution; Telephony; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Theory Mini-Conference, 1999

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-5653-5

Type

conf

DOI

10.1109/CTMC.1999.790245

Filename

790245