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Interference alignment (IA), given uncorrelated channel components and perfect channel state information, obtains the maximum degrees of freedom in an interference channel. Little is known, however, about how the sum rate of IA behaves at finite transmit power, with imperfect channel state information, or antenna correlation. This paper provides an approximate closed-form signal-to-interference-plus-noise-ratio...
The Wyner model has been widely used to model and analyze cellular networks due to its simplicity and analytical tractability. The key aspects of this model are fixed user location and deterministic and homogeneous interference intensity. While clearly a significant simplification of a real cellular system, which has random user locations and interference levels that can vary by several orders of...
Despite the shortage of available frequency spectrum, recent studies have shown that the actual usage of the allocated spectrum is scarce. The IEEE is developing the 802.22 standard for spectral reuse in TV bands that uses cognitive radio (CR) technology. One of the essential and challenging features of CR is spectrum sensing. This paper proposes a novel spectrum sensing algorithm using spectral covariance...
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