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Transmission strategies for millimeter wave systems have become a promising strategy to achieve a higher quality of service in the network. Those strategies stem out from various network optimization criterion retaining a harmony between the quality of service and energy incurred to the system. In this paper, we address two such network optimization strategies, namely — transmit power minimization...
The transmit beamforming for millimeter wave systems has become a promising strategy to achieve higher spectral efficiency. The beamforming design for such systems stems out from various network optimization criterions that strike a balance between quality of service and energy/cost incurred to the system. We offer a simple and comprehensive solution to one of such key network optimization problems,...
The usage of the higher frequency band in the millimeter wave systems implies higher pathloss, despite its elegance in providing an enormous spectrum for future cellular networks. Such systems rely on beamforming and precoding/combining techniques with large number of antennas to achieve adequate operational link margin. The requirement of complete channel information is hence imperative for such...
The usage of hybrid network consisting of massive multiple input multiple output (MIMO) co-existing with small cell networks (SCNs), are considered to be a key technique for the future wireless communication systems. However, the co-existing SCNs not only require on-site hardware installation, but also increase the static power of the system thereby reducing the energy efficiency (EE). To circumvent...
The usage of perfect and instantaneous CSIT in a SINR-constrained transmit power minimization requires excessive resources to acquire and distribute channel information. Recent works relying on statistical SINR constraints designed under prescribed outage loosens the original constraint in converting statistical inequalities to deterministic convex equivalents. In this paper, we offer a simple solution...
The signal to interference and noise ratio (SINR)-constrained transmit (TX)-power minimization problem, incorporating perfect and instantaneous channel state information at the transmitter (CSIT), culminates in higher overhead and extensive backhauling, likewise average CSIT suffers from quality fluctuations. Also, methods relying on the statistical SINR constraints require several algebraic steps...
We propose a simple solution based on Perron-Frobenius theorem and uplink-downlink duality to the longstanding problem of transmission strategies: maximize the minimum SINR or minimize the transmit power. In contrary of using perfect and instantaneous CSIT (requires higher overhead and backhauling), or using only average CSIT, e.g. channel covariance which suffers from quality fluctuations; we account...
A novel technique for jointly allocating sub-carriers, modulation and coding scheme (MCS) and transmit power in an orthogonal frequency division multiple access (OFDMA) cellular network using ant-colony optimization technique is proposed. Different combinations of user indices, MCS indices and subcarrier indices form the nodes in the graph. Each possible assignment of the above resources is a path...
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