Abstract
In direct-sequence code division multiple access (DS-CDMA) cellular radio systems, power control is an important means to achieve higher communication link quality and larger system capacity. In order to track a desired signal-to-interference-plus-noise ratio (SINR) under round-trip delay, multiple access interference (MAI), channel fading, and noise, a robust state feedback control via a desired pole (eigenvalue) placement and an i\ optimal prediction is proposed for power control of CDMA systems. The ℓ 1 predictor is used to predict the tracking error to compensate for the effect of round-trip delay, such that the peak of prediction error due to the uncertainties of channel fading, interference, and noise is as small as possible. Then the optimal ℓ 1 predictor design problem is transformed to a suboptimal prediction problem by minimizing the upper bound of the ℓ 1 norm of SINR tracking error and solving the eigenvalue problem (EVP) under some linear matrix inequality (LMI) constraints. Under the proposed framework, the global information of the channel gains of all users in the CDMA system is not required.
Original language | English |
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Article number | 1705953 |
Pages (from-to) | 2914-2922 |
Number of pages | 9 |
Journal | IEEE Transactions on Wireless Communications |
Volume | 5 |
Issue number | 10 |
DOIs | |
State | Published - 10 2006 |
Externally published | Yes |
Keywords
- Code division multiaccess
- LMI
- Power control
- ℓ prediction control