Details

Autor(en) / Beteiligte

• Wei Yu
• Cioffi, J.M.

Titel

FDMA capacity of Gaussian multiple-access channels with ISI

Ist Teil von

• IEEE transactions on communications, 2002-01, Vol.50 (1), p.102-111

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2002

Quelle

IEEE Xplore

Beschreibungen/Notizen

• This paper proposes a numerical method for characterizing the rate region achievable with frequency-division multiple access (FDMA) for a Gaussian multiple-access channel with intersymbol interference. The frequency spectrum is divided into discrete frequency bins and the discrete bin-assignment problem is shown to have a convex relaxation, making it tractable to numerical optimization algorithms. A practical low-complexity algorithm for the two-user case is also proposed. The algorithm is based on the observation that the optimal frequency partition has a two-band structure when the two channels are identical or when the signal-to-noise ratio is high. The simulation result shows that the algorithm performs well in other cases as well. The FDMA-capacity algorithm is used to devise the optimal frequency-division duplex plan for very-high-speed digital subscriber lines.