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I. INTRODUCTION MIMO technology is becoming mature, and incorporated into emerging wireless broadband standards like LTE [1]. For example, the LTE standard allows for up to 8 antenna ports at the base station. Basically, the more antennas the transmitter/receiver is equipped with, and the more degrees of freedom that the propagation channel can provide, the(More)
This paper addresses energy-efficient design for uplink multiuser SIMO frameworks with marked channel state data (CSD) at the base station (BS). Since the CSD at the BS is constantly unreliable because of the channel estimation error and delay, the imperfectness of the CSD needs to be considered in practical framework plan. It causes interuser impedance at(More)
MIMO technology is a way of using multiple antennas to simultaneously transmit multiple streams of data in wireless communication systems. MIMO in cellular systems brings improvements on four fronts: • improved data rate, because the more antennas, the more independent data streams can be sent out; • improved reliability, because the more antennas the more(More)
—In this correspondence, we study the achievable rate region of the multiple-input single-output (MISO) interference channel, under the assumption that all receivers treat the interference as additive Gaussian noise. Our main result is an explicit parametrization of the Pareto boundary for an arbitrary number of users and antennas. The parametrization(More)
Massive MIMO is a promising technique to increase the spectral efficiency (SE) of cellular networks, by deploying antenna arrays with hundreds or thousands of active elements at the base stations and performing coherent transceiver processing. A common rule-of-thumb is that these systems should have an order of magnitude more antennas, M , than scheduled(More)
—We consider the problem of coordinating two competing multiple-antenna wireless systems (operators) that operate in the same spectral band. We formulate a rate region which is achievable by scalar coding followed by power allocation and beamforming. We show that all interesting points on the Pareto boundary correspond to transmit strategies where both(More)
—The orthogonal frequency-division multiplexing access technique has recently been attracting considerable interest especially for wireless local area networks (WLAN's). In this letter, we consider the joint estimation of the symbol timing, the channel length and the channel-impulse response. A novel estimation algorithm based on maximum-likelihood(More)
—We consider multicell multiuser MIMO systems with a very large number of antennas at the base station (BS). We assume that the channel is estimated by using uplink training. We further consider a physical channel model where the angular domain is separated into a finite number of distinct directions. We analyze the so-called pilot contamination effect(More)