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We study the Gaussian one-to-many interference network which is obtained as a special case of a general interference network, where only one transmitter generates interference in the network. We allow transmission of messages on all the links of the network. This communication model is different from the corresponding one-to-many interference channel. We formulate two transmission strategies for the...
In this paper, the analytical channel capacity of the decode-and-forward (DF) based dual-hop free space optical (FSO) system is studied. The FSO links are assumed to be asymmetric in nature and the turbulence is considered to follow the Gamma-Gamma distribution. For the considered DF FSO cooperative system, power series based mathematical expressions of the average channel capacity are derived, under...
In this paper, we investigate the impact of outdated channel state information (CSI) on the channel capacity of an opportunistic relaying system in conjunction with adaptive transmission techniques. We derive the closed-form expressions of the channel capacity and its associated outage probability for four adaptive transmission techniques: (1) optimal rate adaptation with constant transmit power,...
The ergodic channel capacity (ECC) of single-branch receivers is studied under the scenarios described by means of α-η-μ, α-к-μ, and α-λ-μ-η generalized fading channels. Novel expressions are derived, which are the most general in this scientific area. Moreover, it is shown that, for any given fading condition, the α-μ ECC divides the fading plane in two regions of capacity, appearing as either lower...
In this paper, we present a simple way to compute the ergodic capacity of cascaded channels with perfect channel state information at both the transmitter and the receiver. We apply our generic results to the Rayleigh-double fading channel, and to the free-space optical channel in the presence of pointing errors and we express their low signal-to-noise ratio capacities. We mainly focus on the low...
To combat the bottleneck effect in the relay channels, this paper proposes a simple power-control algorithm for decode-and-forward cooperative networks with opportunistic relay selection. Taking advantage of the existing channel state information, which is a by-product during the process of relay selection, an optimal power allocation factor can be easily figured out. This factor is quantized into...
In this paper we investigate low complexity millimeter-wave communication systems for uniform circular arrays (UCAs) in line-of-sight (LOS) multiple-input multiple-output (MIMO) channels. We first demonstrate that the MIMO channel matrices for UCAs in LOS-MIMO channels are circulant matrices. Then, we show that the channel matrices can be made orthogonal by choosing the array diameters appropriately...
We consider the problem of assigning a group of users with different rate requirements to a set of frequency bands, which may have different bandwidths, when the users access the channel via carrier-sense multiple access (CSMA). For example, in systems that employ dynamic spectrum access (DSA), secondary users may interleave their transmissions into space-time-frequency slots left open by primary...
Orthogonal frequency division multiplexing (OFDM) brings severe co-channel interference for cell-edge users (CEUs). To deal with this problem, traffic-pairing scheme based on particle swarm optimization (TP-PSO) is proposed as an efficient scheme in downlink Coordinated Multi-Point multi-user multi-input multi-output (CoMP-MU-MIMO) transmission/reception. This paper jointly considers CEUs' signal...
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