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In this paper we consider a MIMO-OFDM system, with orthogonal space time block code (OSTBC), under the condition of channel estimation error. First we derive a simple closed-form formula for the symbol error rate, assuming a Gaussian channel estimation error. Then, we present an adaptive power allocation, across both the time slots and subcarriers, to minimize the symbol error rate. Our analysis is...
In this paper, we propose a robust STBC transmission scheme to combat the timing synchronization errors over frequency-selective multiple-access channels. First, the equivalent channel model in the presence of timing synchronization errors is derived and we find that the synchronization errors result in an equivalent channel model with larger number of correlated channel taps. Based on this correlated...
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