The application of X and Y Precoder in MIMO system with limited feedback channel


Abstract in English

Recent years have witnessed a significant growth in wireless communication as a result of user demand on high rates of data transmission. Therefore, there is a great motivation for the application of MIMO systems in many modern communication standards in order to provide the required data transmission rates. Unfortunately, these systems are sensitive to poor transmission conditions such as fading. Precoding can improve the performance of MIMO systems to adapt with channel conditions by knowing the full channel state information (CSI) at the transmitter. However, a full CSI is often unrealistic in practice because of the huge amount of this information to be sent back. Therefore, this information must be reduced and sent through a limited feedback channel. X and Y Precoder are one of the precoding techniques that have been studied assuming a full CSI at the transmitter. In this research, we will add a limited feedback channel to this technique in order to become applicable in practice. The result has shown that the loss of performance by adding a limited feedback channel may be acceptable.

References used

FOSCHINI, G. J.Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas. Bell labs technical journal. Vol. 1, No .2, 1996,41-59
MIETZNER, J; SCHOBER, R; LAMPE, L; GERSTACKER, W. H; A. HOEHER, A. P. Multiple Antenna Techniques for Wireless Communications – A Comprehensive Literature Survey. IEEE communications. Surveys &tutorials. Vol. 11, No. 2, second quarter, 2009
KWABENA, A. A. Multiple Input Multiple Output (MIMO) Operation Principles. Helsinki Metropolia University of Applied Sciences. Thesis, 2013

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