SER analysis and power allocation of OSTBC-OFDM with channel estimation error

Authors:
Hamed Maleki;Said Nader-Esfahani
Affiliations:
School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran;School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran
Venue:
ISWPC'09 Proceedings of the 4th international conference on Wireless pervasive computing
Year:
2009

Citing 6
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Abstract

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 sub carriers, to minimize the symbol error rate. Our analysis is based on number of transmit and receive antenna, the code rate of OSTBC, number of subcarriers and a parameter determining Gaussian channel estimation error. Simulation results confirm the accuracy of our SER expression and its improvement by our proposed adaptive power allocation method.