Using adaptive equalizing in LTE with MIMO
DOI:
https://doi.org/10.15587/1729-4061.2012.5256Keywords:
LTE, MIMO, Space time coding, Intersymbol Interference, adaptive equalizer, Zero Forcing, Minimum Mean Square ErrorAbstract
The given work is devoted to the analysis of using method of equalization in LTE systems with different MIMO configuration for purpose increasing characteristics quality of communication. Although equalizers promise to improve the signal to noise energy ratio, zero forcing (ZF) equalizers are derived classically in a deterministic setting minimizing intersymbol interference, while minimum mean square error (MMSE) equalizer solutions are derived in a stochastic context based on quadratic Wiener cost functions. The problem of InterSymbol Interference (ISI) and the basic concept of transversal equalizers are introduced followed by a simplified description of some practical adaptive equalizer structures and their properties. Adaptive equalizers compensate for signal distortion attributed to intersymbol interference, which is caused by multipath within time-dispersive channelsReferences
- Wong & Lok: “Theory of Digital Communications” chapter 4: ISI & Equalization. http://www.wireless.ece.ufl.edu/twong/Notes/Comm/ch4.pdf.
- “Chapter 3 Equalization”, [Online]. Available: http://www.stanford.edu/group/cioffi/book/chap3.pdf.
- “Bit Error Rate Performance Analysis of ZF, ML and MMSE Equalizers for MIMO Wireless Communication Receiver”, Nagarajan Sathish Kumar, K. R. Shankar Kumar, European Journal of Scientific ResearchISSN 1450-216X Vol.59 No.4 (2011)
- “Automatic 606 equalization for digital communication”, R.W.Lucky, in Bell System Technical Journal, vol. 44, pp. 547–588, April 1965.
- “Techniques for adaptive equalization of digital communication systems”, R.W.Lucky, in Bell System Technical Journal, vol. 45, pp. 255–286, Feb. 1966.
- “Convergence Properties of Adaptive Equalizer Algorithms”, Markus Rupp, Senior Member IEEE, Vienna University of Technology, Institute of Telecommunications, Gusshausstr. 25/389, 1040 Vienna, Austria.
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