Absiract-We have fabricated active probes for on-wafer waveform and network measurements. The probes incorporate GaAs nonlinear transmission line (NLTL) based network analyzer (NWA) integrated circuits and low-loss quartz coplanarwaveguide probe tips. The active probes show step response falltimes of 2.7 ps when excited by a 0.7-ps falltime input. Using these active probes, we demonstrate both ...

Space-time coding (STC) has been shown to play a key role in the design of MIMO radars with closely spaced antennas. Multiple-input–multiple-output (MIMO) radar is emerging technology for target detection, parameter identification, and target classification due to diversity of waveform and perspective. First, it turns out that a joint waveform optimization problem can be decoupled into a set of...

In radar systems, many researchers focused on the waveform design to improve the performance. And many algorithms just only consider the energy of the transmitted waveform. However, in practice, only the energy constraint is insufficient to guarantee that the signal will satisfy common envelope requirements, such as constant modulus that is important to radar transmitter. In this paper, we prop...

In this paper, the problem of low probability of intercept (LPI)-based radar waveform design for distributed multiple-radar system (DMRS) is studied, which consists of multiple radars coexisting with a wireless communication system in the same frequency band. The primary objective of the multiple-radar system is to minimize the total transmitted energy by optimizing the transmission waveform of...

The problem of data-driven joint design transmitted waveform and detector in a radar system is addressed this article. We propose two novel learning-based approaches to based on end-to-end training the system. first approach consists alternating supervised for fixed reinforcement learning transmitter detector. In second approach, are trained simultaneously. Various operational constraints, such...