TY - JOUR
T1 - Joint signaling techniques and spectral optimization for symmetric bit-rate communication over self-NEXT-dominated channels
AU - Gaikwad, Rohit V.
AU - Baraniuk, Richard G.
N1 - Funding Information:
Paper approved by C.-L. Wang, the Editor for Wireless Spread Spectrum of the IEEE Communications Society. Manuscript received January 14, 2000; revised October 20, 2000 and April 2, 2001. This work was supported in part by the National Science Foundation under Grant MIP-9457438 and Grant CCR-9973188, in part by Nortel Networks, in part by SBC Communications, and the in part by the Texas Instruments Leadership University Program.
PY - 2004/7
Y1 - 2004/7
N2 - We present a framework for maximizing the capacity of symmetric bit-rate communication services dominated by Gaussian crosstalk, in particular, digital subscriber line (DSL) services. We solve for optimal transmit power spectral densities (PSDs) that maximize the joint capacity of same-service users and yield significant gains in bit rates (or performance margins) over current schemes. Our results differ from previous work in that we develop transmit spectra in the presence of self-far-end crosstalk in addition to self-near-end crosstalk, present optimal contiguous spectra for practical modulation schemes, and derive optimal spectra under an additional frequency-domain peak-power constraint. Furthermore, by design, the optimal transmit PSDs are spectrally compatible with existing services on neighboring lines.
AB - We present a framework for maximizing the capacity of symmetric bit-rate communication services dominated by Gaussian crosstalk, in particular, digital subscriber line (DSL) services. We solve for optimal transmit power spectral densities (PSDs) that maximize the joint capacity of same-service users and yield significant gains in bit rates (or performance margins) over current schemes. Our results differ from previous work in that we develop transmit spectra in the presence of self-far-end crosstalk in addition to self-near-end crosstalk, present optimal contiguous spectra for practical modulation schemes, and derive optimal spectra under an additional frequency-domain peak-power constraint. Furthermore, by design, the optimal transmit PSDs are spectrally compatible with existing services on neighboring lines.
UR - http://www.scopus.com/inward/record.url?scp=3543139460&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3543139460&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2004.831373
DO - 10.1109/TCOMM.2004.831373
M3 - Article
AN - SCOPUS:3543139460
SN - 0090-6778
VL - 52
SP - 1080
EP - 1083
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 7
ER -