Abstract
The asymptotic growth in forward-link sum capacity is characterized as a function of the number of users and transmit antennas with linear receivers. We assume a single cell with frequency-selective fading channels, which are known at the transmitter, and a single receive antenna at each mobile. We first show that when the channel matrices are circulant, multi-carrier transmission maximizes the sum mutual information. A particular subchannel is allocated to the user with the largest channel gain with maximum-ratio combining at the transmitter, and the optimal power allocation across subchannels is determined by water pouring over those gains. By applying results from extreme value theory, we then show that when the channel consists of a large number of i.i.d. Rayleigh fading subchannels, the sum capacity grows as O (log(√N log U + N)) where N is the number of transmit antennas, and U is the number of users. Numerical results are presented, which show that the asymptotic results are valid for moderate size systems.
| Original language | English (US) |
|---|---|
| Pages | 1816-1820 |
| Number of pages | 5 |
| State | Published - Dec 1 2003 |
| Event | IEEE Global Telecommunications Conference GLOBECOM'03 - San Francisco, CA, United States Duration: Dec 1 2003 → Dec 5 2003 |
Other
| Other | IEEE Global Telecommunications Conference GLOBECOM'03 |
|---|---|
| Country | United States |
| City | San Francisco, CA |
| Period | 12/1/03 → 12/5/03 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Global and Planetary Change
Cite this
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Forward Link Capacity with Linear Receivers and Multiple Transmit Antennas. / Bi, Hao; Honig, Michael L.
2003. 1816-1820 Paper presented at IEEE Global Telecommunications Conference GLOBECOM'03, San Francisco, CA, United States.Research output: Contribution to conference › Paper
TY - CONF
T1 - Forward Link Capacity with Linear Receivers and Multiple Transmit Antennas
AU - Bi, Hao
AU - Honig, Michael L
PY - 2003/12/1
Y1 - 2003/12/1
N2 - The asymptotic growth in forward-link sum capacity is characterized as a function of the number of users and transmit antennas with linear receivers. We assume a single cell with frequency-selective fading channels, which are known at the transmitter, and a single receive antenna at each mobile. We first show that when the channel matrices are circulant, multi-carrier transmission maximizes the sum mutual information. A particular subchannel is allocated to the user with the largest channel gain with maximum-ratio combining at the transmitter, and the optimal power allocation across subchannels is determined by water pouring over those gains. By applying results from extreme value theory, we then show that when the channel consists of a large number of i.i.d. Rayleigh fading subchannels, the sum capacity grows as O (log(√N log U + N)) where N is the number of transmit antennas, and U is the number of users. Numerical results are presented, which show that the asymptotic results are valid for moderate size systems.
AB - The asymptotic growth in forward-link sum capacity is characterized as a function of the number of users and transmit antennas with linear receivers. We assume a single cell with frequency-selective fading channels, which are known at the transmitter, and a single receive antenna at each mobile. We first show that when the channel matrices are circulant, multi-carrier transmission maximizes the sum mutual information. A particular subchannel is allocated to the user with the largest channel gain with maximum-ratio combining at the transmitter, and the optimal power allocation across subchannels is determined by water pouring over those gains. By applying results from extreme value theory, we then show that when the channel consists of a large number of i.i.d. Rayleigh fading subchannels, the sum capacity grows as O (log(√N log U + N)) where N is the number of transmit antennas, and U is the number of users. Numerical results are presented, which show that the asymptotic results are valid for moderate size systems.
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M3 - Paper
AN - SCOPUS:0842310896
SP - 1816
EP - 1820
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