Abstract
Reverse link capacity of a direct-sequence code-division multiple-access (DS-CDMA) system in a multicell environment has been studied recently and significant capacity improvement due to the use of beamforming has been observed. However, system performance with beamforming will be affected by several impairments, such as direction of arrival (DOA) estimation errors, array perturbations and mutual coupling. In this paper, reverse link performance of CDMA systems with beamforming under these impairments (imperfect beamforming) is investigated. A simplified beamforming model is developed to evaluate the system performance in terms of user capacity and outage probabilities. Both signal-to-interference ratio (SIR) based power control and strength-based power control are considered in this paper. The capacity degradation due to different impairments is shown and outage probabilities under different power control schemes are compared.
| Original language | English |
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| Pages (from-to) | 137-141 |
| Number of pages | 5 |
| Journal | IEEE Vehicular Technology Conference |
| Volume | 59 |
| Issue number | 1 |
| State | Published - 2004 |
| Event | 2004 IEEE 59th Vehicular Technology Conference, VTC2004-Spring: Towards a Global Wireless World - Milan, Italy Duration: 17 May 2004 → 19 May 2004 |