Pilot Pattern Optimization for Doubly-Selective MIMO OFDM Transmissions (2013)
Abstract / truncated to 115 words
Current wireless transmission systems are far from their theoretically achievable performance bounds. The main reason behind this is a conservative approach of the standardization organizations. Most current standards for wireless communication employ Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) modulation as it offers a high spectral effciency. These systems require the insertion of at the receiver known symbols in order to estimate the transmission channel. These so-called pilot-symbols consume available resources such as power and bandwidth, and therefore eff ectively decrease spectral effciency. This thesis deals with pilot pattern optimization for MIMO OFDM transmission systems. First, an optimal power distribution among pilot- and data-symbols is considered. The post-equalization Signal to Interference and Noise Ratio (SINR) ... toggle 8 keywordsMIMO – OFDM – LTE – pilot pattern – power distribution – performance modelling – ICI – adaptive pilot patterns
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