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Terahertz spectrum is being researched upon to provide ultra-high throughputradio links for indoor applications, e.g., virtual reality (VR), etc. as wellas outdoor applications, e.g., backhaul links, etc. This paper investigates amonopulse-based beam tracking approach for limited mobility users relying onsparse massive multiple input multiple output (MIMO) wireless channels. Owingto the sparsity, beamforming is realized using digitally-controlled radiofrequency (RF) / intermediate-frequency (IF) phase shifters with constantamplitude constraint for transmit power compliance. A monopulse-based beamtracking technique, using received signal strength indi-cation (RSSI) isadopted to avoid feedback overheads for obvious reasons of efficacy andresource savings. The Matlab implementation of the beam tracking algorithm isalso reported. This Matlab implementation has been kept as general purpose aspossible using functions wherein the channel, beamforming codebooks, monopulsecomparator, etc. can easily be updated for specific requirements and withminimum code amendments.

Monopulse-based THz Beam Tracking for Indoor Virtual Reality Applications