Both the conventional time-division-multiplexing channel sounder and the horn-antenna-rotating millimeter-wave channel sounder suffer from a serious problem that significant time consumptions are inevitable when sounding a spatial channel in 3- dimensions. In this paper, a novel channel sounder utilizing Hybrid BeamForming (HBF) techniques is presented which can complete a 3D channel measurement in microseconds, facilitating wideband MIMO channel sounding in time-variant cases, such as vehicular scenarios. The sounder is equipped with 64 transmitter (Tx) antennas and 64 receiver (Rx) antennas. The Tx makes use of digital beamforming (DBF) to compose 8 directive radiation patterns by superimposing multiple weighted patterns each generated with 8 antennas through analog beamforming. The Rx receives signals through 8 parallel front-end chains each connected to an 8- element antenna array. A 26-GHz channel measurement campaign was conducted by using the sounder in a line-of-sight indoor environment. The results demonstrate the applicability of the sounder in measuring millimeter-wave channels. Moreover, special notes are given on the appropriate usage of parameter estimation algorithms to processing the HBF channel sounding data.
Performance Evaluation of a Hybrid-Beamforming Sounder for 26 GHz Channel Measurements
2017-09-01
640400 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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