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This paper presents the types and classes of sensing related information to be exchanged among the entities in cognitive radio systems. The information was extracted by analyzing distributed spectrum sensing use cases and has been checked for the consistence with available sensing techniques and sensors' capability. This paper also introduces IEEE P1900.6 WG recent activities on standardizing the...
TV White Spaces (TVWS) refer to segments of the TV spectrum not used by licensed users in a given location. In recent years, regulation agencies throughout the world consider the possibility to open TVWS to unlicensed use, which is followed by standardization activities to realize it. One of the important aspects of unlicensed operation in TVWS is coexistence between heterogenous networks. This paper...
A novel beamforming (BF) system that employs two switched beam antennas (SBAs) at both ends of the wireless link in an indoor double-directional radio channel (DDRC) is proposed. The distributed directivity gain (DDG) and beam pattern correlation in DDRC are calculated. The channel capacity of the BF system is obtained from an analytical model. Using the channel capacity and outage capacity as performance...
A novel scheme that jointly utilizes switched beam antennas in double-directional radio channel (DDRC) is proposed. Employing directional beam pattern at both transmitter (Tx) and receiver (Rx) sides in DDRC provides distributed directivity gain (DDC). Jointly switching directional patterns at both ends provides extra diversity gain. We employ two electronically steerable parasitic array radiator...
A novel direction of arrival (DOA) estimation technique that uses the conventional multiple-signal classification (MUSIC) algorithm with periodic signals is applied to a single-port smart antenna. Results show that the proposed method gives a high-resolution (1 degree) DOA estimation in an uncorrelated signal environment. The novelty lies in that the MUSIC algorithm is applied to a simplified antenna...
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