TY - JOUR
T1 - Reverse link capacity of SIR-based power-controlled CDMA systems with antenna arrays
AU - Yu Jin, Jin
AU - Yao, Yu Dong
PY - 2003/9
Y1 - 2003/9
N2 - In this paper, reverse link capacity, in terms of user capacity, of a code-division multiple access (CDMA) system with both beamforming and antenna diversity under a multipath environment is analyzed and compared. Signal-to-interference ratio (SIR) based power control is assumed in the system. Antenna elements are divided into several groups to achieve antenna diversity gain. Antenna elements in a group are closely spaced to perform beamforming in order to suppress the own-cell and other-cell interference, while those groups are widely spaced to achieve the diversity gain. Based on the comparison, a most efficient use of the antenna array according to the distribution of antenna elements among the groups is obtained. Instead of using tedious iterative methods to evaluate user capacity, a simple closed-form capacity expression with respect to antenna diversity and beamforming gains, a target SIR and the CDMA processing gain is derived. Numerical results indicate significant capacity improvement with the antenna array.
AB - In this paper, reverse link capacity, in terms of user capacity, of a code-division multiple access (CDMA) system with both beamforming and antenna diversity under a multipath environment is analyzed and compared. Signal-to-interference ratio (SIR) based power control is assumed in the system. Antenna elements are divided into several groups to achieve antenna diversity gain. Antenna elements in a group are closely spaced to perform beamforming in order to suppress the own-cell and other-cell interference, while those groups are widely spaced to achieve the diversity gain. Based on the comparison, a most efficient use of the antenna array according to the distribution of antenna elements among the groups is obtained. Instead of using tedious iterative methods to evaluate user capacity, a simple closed-form capacity expression with respect to antenna diversity and beamforming gains, a target SIR and the CDMA processing gain is derived. Numerical results indicate significant capacity improvement with the antenna array.
KW - Antenna diversity
KW - Beamforming
KW - Code-division multiple access (CDMA)
KW - Rake receiver
KW - User capacity
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U2 - 10.1002/wcm.155
DO - 10.1002/wcm.155
M3 - Article
AN - SCOPUS:13244269950
SN - 1530-8669
VL - 3
SP - 759
EP - 772
JO - Wireless Communications and Mobile Computing
JF - Wireless Communications and Mobile Computing
IS - 6
ER -