Waveform diversity for closed-loop wide-band cognitive sensing system

This paper presents the architecture and initial measured performance of a closed-loop multi-input multi-output (MIMO) wide-band cognitive sensing system. A cognitive sensing system is one kind of cyber-physical systems that integrate the computational and physical resources for application driven tasks. In this system, computational resources dwell in the computing engine that controls the closed-loop cognitive sensing system and involves intensive computations for potential algorithms. Through this way, the transmitted waveform can be dynamically changed in response to the environment, target in the scene, and the sensing task requirement. In this paper, a real-time cognitive sensing system is first time demonstrated. The feasibility and design methodology of the system are provided. A 2 by 2 MIMO testbed with 500 MHz bandwidth, 4 GHz carrier frequency is proposed in this paper to demonstrate a bi-static radar application. The results obtained from actual experiment encourage us to explore further based on our testbed.