Computer Science – Networking and Internet Architecture
Scientific paper
2011-04-06
Computer Science
Networking and Internet Architecture
6 pages, 10 figures, submitted to GLOBECOM 2011
Scientific paper
The mmWave communication system is operating at a regime with high number of antennas and very limited number of RF analog chains. Large number of antennas are used to extend the communication range for recovering the high path loss while fewer RF analog chains are designed to reduce transmit and processing power and hardware complexity. In this regime, typical MIMO algorithms are not applicable. Before any communication starts, devices are needed to align their beam pointing angles towards each other. An efficient searching protocol to obtain the best beam angle pair is therefore needed. It is called BeamForming (BF) training protocol. This paper presents a fast BF training protocol called beam coding. Each beam angle is assigned unique signature code. By coding multiple beam angles and steering at their angles simultaneously in a training packet, the best beam angle pair can be obtained in a few packets. This faster BF training protocol not only shows the robustness in non-line-of-sight, multi-user and moving environments, but also provides very flat power variation within a packet as opposed to the IEEE 802.11ad standard which requires resettling the Automatic Gain Control (AGC) for every beam angle change within a training packet.
Addepalli Sateesh
Poon Ada S. Y.
Tsang Ming Y.
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