Physical limits on directional beam performance of 28 GHz links
2017 IEEE INTERNATIONAL CONFERENCE ON MICROWAVES, ANTENNAS, COMMUNICATIONS AND ELECTRONIC SYSTEMS (COMCAS)（2017）
摘要
Impact of finite coherence in frequency and time on directional beam in a canonical 28 GHz small cell link is assessed. Terminal motion and delay spread are found to limit the maximum achievable directional gain due to the need to measure the channel across time and frequency. It is found that pedestrian speeds (1m/s) still allow 1 Gbps rate at 100 m in Non-Line-of-Sight (25 dB shadow) link using 32 array elements in 300 MHz bandwidth, nearly 10x the rate of a 10 MHz-wide cellular link at 2 GHz. Vehicular speed of 30 m/s requires nearly 2x the element count to reach the same rate.
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关键词
MHz-wide cellular link,physical limits,directional beam performance,finite coherence,delay spread,maximum achievable directional gain,pedestrian speeds,array elements,canonical small cell link,nonline-of-sight link,frequency 28.0 GHz,velocity 1.0 m/s,frequency 2.0 GHz,velocity 30.0 m/s,bandwidth 300 MHz,bandwidth 10 MHz
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