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Evaluation of Bounds for MIMO Channel Capacity for Synchronized Detection Approach

Here the focus is on the optimized design and performance of Rayleigh-faded Multi-Antenna multi-input/multi-output (MIMO) systems when both transmitter and receiver share imperfect (i.e., error impaired) channel estimates computed via training sequences. In particular, according to the emerging principle of the so called Synchronized Detection [18,23], for this operating scenario the proposal deals with a simple Water-Filling (WF)-like strategy for allocating power over transmit antennas and the test of its actual performance. Afterwards, the aim is the evaluation of some related figures of merit summarizing the overall system’s performance and their use for pointing out effective system’s design guidelines. In particular, some optimized solutions for power-vs.-bandwidth efficiency tradeoff are presented and their validity limits are debated. All the developed results explicitly take into account the actual reliability of the achievable channel estimates. Multiple-Antenna systems are able to exploit space diversity for increasing conveyed throughput without wasting bandwidth and power resources [1,4,10], so that, at the present, these systems are appealing candidate for emerging 4th generation WLANs [12,16]. In principle, information throughput of Multiple-Antenna systems may be further increased via an optimized allocation of the available power over transmitting antennas. As it is well known, when the MIMO channel is perfectly