Motivated by control with communication constraints, in this work we develop a time-invariant data compression architecture for linear-quadratic-Gaussian (LQG) minimum bitrate prefix-free feedback. For any fixed performance, the approach propose nearly achieves known directed information (DI) lower bounds on time-average expected codeword length. We refine analysis of classical achievability ap...

The paper considers the Linear Quadratic Gaussian (LQG) optimal control problem in the discrete time setting and when data loss may occur between the sensors and the estimation-control unit and between the latter and the actuation points. For protocols where packets are acknowledged at the receiver (e.g. TCP type protocols), the separation principle holds. Moreover, the optimal LQG control is a...

For electro-optical imaging systems, line-of-sight stabilization against different disturbances created by mobile platforms is crucial property. The development of high resolution sensors and the demand in increased operating distances have recently increased the expectations from stabilization loops. For that reason, higher gains and larger bandwidths become necessary. As the stabilization loo...

This paper is concerned with control applications over lossy data networks. Sensor data is transmitted to a estimation-control unit over a network, and control commands are issued to subsystems over the same network. Sensor and control packets may be lost or delayed. This is modeled by allowing that sensor and control packets are successfully received with certain probabilities. In this context...

The purpose of this paper is to present a theoretic and numerical study of utilizing squeezing and phase shift in coherent feedback control of linear quantum optical systems. A quadrature representation with built-in phase shifters is proposed for such systems. Fundamental structural characterizations of linear quantum optical systems are derived in terms of the new quadrature representation. T...

This paper discusses, in both continuous time and discrete time, the issue of certainty equivalence in two-player zero-sum stochastic differential/dynamic games when the players have access to state information through a common noisy measurement channel. For the discrete-time case, the channel is also allowed to fail sporadically according to an independent Bernoulli process, leading to intermi...

ity of the desired transfer-function matrix T,(s) is that the matrix equation (9) is consistent for m > 3 m (i.e., for the case where there are more equations than unknowns). However, as it is seen below, this condition is not sufficient. Suppose that it is required to test the admissibility of a desired transfer-function matrix TAs). Also consider another transfer-function matrix Tu@), for whi...

The identification of the cost function, the optimization of which generates the optimal behavior of a dynamic system, is one of the most challenging problems in the areas of sensorimotor control, machine learning and control theory. The problem could be state as follows: given the dynamics of a system and by observing its behavior we ask what is the cost function that if it was optimized it wo...