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In this paper, we extend a jointly optimized linear prefilter and nonlinear vector perturbation approach to the MIMO multiuser (MU) precoder system where each user has multiple antennas. As a prefilter design, we use the weighted MMSE criterion. Based on the best weighting condition, we propose a recursive MMSE prefilter.
In this paper, we propose an initial synchronization scheme for time and carrier frequency synchronization and cell identification in 802.16e OFDMA downlink. The proposed method does not require knowledge of actual transmitted preamble, but only utilizes the preamble structure and inverse Fourier transform properties to obtain time/frequency synchronization. Through simulations, we show that the proposed...
This paper considers a wireless cooperative cellular data network with a base station and many subscribers in which the subscribers have the ability to relay information for each other to improve the overall network performance. For a wireless network operating in a frequency-selective fading environment, the choices of relay node, relay strategy, and the allocation of power and bandwidth for each...
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