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We introduce space-time block coding (STBC) technique with pre-equalization and new block code design denoted by transmit equalization code (TEC), especially for four transmit antennas case. Proposed code is designed to eliminate interferences between transmit antennas and a receive antenna with great transmission rate. Transmit symbol which is encoded by the new code is equalized at transmitter....
Multiple-input-multiple-output (MIMO) technology can efficiently increase the system capacity in rich scattering environments without increasing the bandwidth or transmission power. The precoder for MIMO transmission is a processing technique that exploits the channel state information (CSI) by operating on the signal before transmission to effectively improve link performance. A hybrid automatic...
In this paper, we study channel estimation methods with various curve fitting techniques for mobile WiMAX system and find that they cannot support high mobility sufficiently. We also propose a channel estimation method which is based on piecewise linear estimation to overcome the problem of high mobility. The performances including mean squared error (MSE) and bit error rate (BER) are compared and...
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