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Distributed precoder for multicell multi-input multi-output (MIMO) networks is designed in this paper, which is implemented in a distributed manner instead of the central manner. Considering the interference can be transformed into the useful contribution, the criterion of maximizing the signal to leakage plus noise ratio (SLNR) is first introduced for the distributed precoder design. Moreover, in...
In this paper, we study the performance of bi-directional (two-way) communication system using two different broadcast schemes with network coding. We propose the use of Max-Min criteria for antenna selection with binary network coding and transmit beamforming without binary network coding. We derive and show that unlike traditional antenna selection with binary network coding scheme, the Max-Min...
We consider a multi-cell wireless network with universal frequency reuse and treat the problem of co-channel interference mitigation in the downlink channel. Assuming that each base station serves multiple single-antenna mobiles via space-division multiple-access, we jointly optimize the linear beam-vectors across a set of coordinated cells and resource slots: the objective function to be maximized...
Coordinated linear transmit-receive processing with beam selection is a method to utilize all degrees of freedom available in multiuser multiple-input multiple-output (MIMO) cellular systems in order to increase system capacity. By applying channel state information in the transmitter (CSIT), the base station (BS) is able to spatially multiplex downlink data streams for different users. In the time...
We consider a multi-cell MIMO downlink (network MIMO) where B base-stations (BS) with M antennas, connected to a central station (CS), transmit K messages to K single-antenna user terminals (UT) simultaneously. Although many works have shown the potential benefits of network MIMO, the conclusion critically depends on the underlying assumption of perfect channel state information at transmitters (CSIT)...
In this paper, we consider a downlink communication system in which a base station (BS) equipped with M antennas and power constraint P communicates with N users each equipped with K receive antennas. It is assumed that the receivers have perfect channel state information (CSI), while the BS only knows the partial CSI, provided by the receivers via feedback. We study the minimum amount of feedback...
Multicell cooperative processing (MCP) has been recognised as an efficient technique for increasing spectral efficiency of future cellular systems. However the provided benefits come at the cost of increased overhead and computational complexity; Mobile Stations (MSs) need to feed back to their assigned Base Station (BS) their local channel state information (CSI) which in turn needs to be transmitted...
In this paper, downlink opportunistic scheduling is studied in a multiuser environment with single-antenna base station and users. Analytical symbol error rate (SER) expressions are derived under the assumptions of full and quantized channel state information (CSI) at the transmitter. These expressions are used to optimize the channel state feedback parameters.
Recent work on wireless beamforming has focused on multi-user diversity effects, where terminals are chosen opportunistically based on their responses to test beams. Orthogonality between the test beams is typically chosen to aid subsequent interference-free transmission to the corresponding terminals. However, much of this work assumes that: (i) the pool of terminals on a given frequency-band is...
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