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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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Title: Scalable Wideband Closed-Loop Beam-Former Receiver Array for Full-FoV Instinctual and Autonomous Unknown Blocker Rejection and Signal Tracking
Committee:
Dr. Wang, Advisor
Dr. Swaminathan, Chair
Dr. Chang
Abstract:
The objective of the proposed research is to create a first-ever MIMO system that achieves low-latency and instinctual multiple signal/blocker management for future mm-Wave communications/ fiber-wireless networks. To support future mm-Wave wireless systems, such as 5G new radio (NR), massive MIMOs leverage large array size to substantially enhance the mm-Wave link budget and spatial selectivity, but their resulting narrow beamwidth drastically complicates the transmitter-receiver (TX-RX) alignment. Unlike existing mm-Wave applications that are mostly in “static” settings, many future mm-Wave links are expected to operate in highly “dynamic” environments, necessitating rapid and precise beam-forming/-tracking to ensure high link reliability and extreme low latency.To address these challenges, this proposal shows a new MIMO receiver array that is the first of its kind to support hybrid beam-forming, achieving autonomous and dynamic rejection of unknown blockers and beam-forming on unknown desired signals. The proposal demonstrates that the desired signals with wideband modulated 64-/256Q-AM are successfully measured and demodulated after cancelling the in-band/co-channel blockers with the same modulation scheme and modulation rate. The closed-loop DSP-free mm-wave/RF front-end beam-former also achieves rapid response time of < 1µs per beam-former stage, which is 100× ~ 1000× faster than the state-of-the-art mm-wave/analog/digital beam-formers using baseband DSP signal processing for beam-finding. This is the first proposed MIMO system for achieving autonomous wideband modulated 64-/256-QAM blocker rejection and signal beam-forming with ultra-low-latency µs response time.
