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The downlink coverage of a 5G trial system operating within the 15 GHz frequency band is evaluated in this paper with the help of drive test measurements. Key 5G features, such as beamforming, beam tracking and multi-point transmission have been utilized during the measurements. The results indicate that multi-point transmission provides a clear improvement to the downlink coverage. Received signal...
This paper presents indoor and outdoor experimental results on 4-by-8 single-user (SU)-multiple-input multiple-output (MIMO) multiplexing based on 730.5 MHz bandwidth transmission when applying carrier aggregation (CA) with 8 component carriers (CCs) in a 15 GHz frequency band in the downlink of 5G cellular radio access. Beam tracking with massive MIMO is implemented in a 5G testbed to support user...
Future systems of the 5th generation are slated to use the mm-wave bands due to the large slices of bandwidth available at those frequencies. Relative to the contemporary microwave bands, to compensate for the harsh propagation conditions, highly directional communication using beamforming methods is necessary to achieve a level of reliable communication, however minimal. Due to the fragile nature...
Novel mmWave-based multi-spot beam cellular system was introduced as one of means to satisfy the capacity requirement of 5G mobile communications. Its structural characteristic was that the service area of base station was covered with spot beams formed by many beamforming antennas, and one beam can be composed of multiple beam component carriers (BCCs) divided into multiple sub-bands within one broadband...
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