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This paper describes wideband (1 GHz) base station diversity and coordinatedmultipoint (CoMP)-style large-scale measurements at 73 GHz in an urbanmicrocell open square scenario in downtown Brooklyn, New York on the NYUcampus. The measurements consisted of ten random receiver locations atpedestrian level (1.4 meters) and ten random transmitter locations at lamppostlevel (4.0 meters) that provided 36 individual transmitter-receiver (TX-RX)combinations. For each of the 36 radio links, extensive directionalmeasurements were made to give insights into small-cell base station diversityat millimeter-wave (mmWave) bands. High-gain steerable horn antennas with7-degree and 15-degree half-power beamwidths (HPBW) were used at thetransmitter (TX) and receiver (RX), respectively. For each TX-RX combination,the TX antenna was scanned over a 120-degree sector and the RX antenna wasscanned over the entire azimuth plane at the strongest RX elevation plane andtwo other elevation planes on both sides of the strongest elevation angle,separated by the 15-degree HPBW. Directional and omnidirectional path lossmodels were derived and match well with the literature. Signal receptionprobabilities derived from the measurements for one to five base stations thatserved a single RX location show significant coverage improvement over allpotential beamformed RX antenna pointing angles. CDFs for nearest neighbor andBest-N omnidirectional path loss and cell outage probabilities for directionalantennas provide insights into coverage and interference for future mmWavesmall-cells that will exploit macro-diversity and CoMP.

Base Station Diversity Propagation Measurements at 73 GHz Millimeter-Wave for 5G Coordinated Multipoint (CoMP) Analysis