- Title
- Three-degree of freedom adaptive power control for CDMA cellular systems
- Creator
- Agüero, J. C.; Goodwin, G. C.; Lau, K.; Wang, M.; Silva, E. I.; Wigren, T.
- Relation
- IEEE Global Telecommunications Conference, 2009 (GLOBECOM 2009). GLOBECOM 2009: 2009 IEEE Global Telecommunications Conference (Honolulu, HI 30 November - 4 December, 2009)
- Publisher Link
- http://dx.doi.org/10.1109/GLOCOM.2009.5425906
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- conference paper
- Date
- 2009
- Description
- The successful operation of CDMA systems depend on the use of power control. This is needed to address the "near far" effect and to mitigate the effects of fading. Other factors also impact on the achievable performance of the power control loop including the fact that only the sign of the power increments are transmitted. The paper presents new methods and results to improve control with respect to the latter strongly non-linear effect. An adaptive control architecture, having three degrees of freedom, is therefore proposed for inner loop power control. The three degrees of freedom are used to address errors resulting from (i) channel and interference variations, (ii) quantization of the power increments and (iii) saturation of the power increments. Simulations show that the proposed controller outperforms other related schemes. A major reason for this is the ability of the three degree of freedom controller to reduce the variation of the control signal to be quantized.
- Subject
- CDMA cellular systems; channel variations; inner loop power controls; interference variations; near far effects; power control loops
- Identifier
- http://hdl.handle.net/1959.13/918688
- Identifier
- uon:8680
- Identifier
- ISBN:9781424441488
- Identifier
- ISSN:1930-529X
- Rights
- Copyright © 2009 IEEE. Reprinted from GLOBECOM 2009: 2009 IEEE Global Telecommunications Conference. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of University of Newcastle's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
- Language
- eng
- Full Text
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