Coverage and Capacity Analysis for Terahertz Integrated Sensing and Communication Networks

Terahertz integrated sensing and communication (ISAC) is viewed as a game-changing technology to realize Terabit-per-second data rate and millimeter-level sensing in sixth-generation (6G) and beyond systems. To characterize the theo-retical performance of communication and sensing, an analytical framework for THz ISAC networks is developed by using the tool of stochastic geometry. In the presence of the blockage effects, channel fading and directional antenna radiation, the moment generating functions (MGFs) of the aggregated interference are derived. By utilizing the MGF of interference, the analytical expressions for coverage and capacity of THz ISAC networks are derived. Numerical results indicate that the coverage probabilities for THz ISAC networks are maximized at the access point (AP) density of 0.06 m-2, Moreover, it is verified that the fully-unified ISAC waveform is the most efficient scheme in contrast with frequency-division and time-division ISAC.