Integrated Sensing And Communication In Unlicensed Mmwave Bands: Joint Beamforming Training And Energy Allocation

Integrated sensing and communication (ISAC) within the unlicensed millimeter-wave (mmWave) frequency bands has been emerged as a pivotal technology in the next generation wireless communication era. However, the interference management issue between sensing and communication becomes much severe due to the absence of centralized scheduling function of the widely existed WiGig networks with the IEEE 802.11ay protocol in the unlicensed mmWave bands. In this way, we aim to investigate an efficient ISAC scheme for the promising WiGig networks via embedding radar pulses into the IEEE 802.11ay beamforming training (BFT) period. Particularly, we transmit both radar pulses and communication signals by exploiting the sector-level sweep of the WiGig network. Since there is a trade-off between radar detection/sensing and mmWave communication under diverse resource assignments, we propose a joint BFT and energy allocation strategy to find an achievable balance. Numerical results validate the effectiveness of the proposed scheme.