In this paper we study optimal control of time-varying multi-input multi-output stochastic systems and develop a generalised minimum variance controller. The system to be controlled is described using a multiinput multi-output time-varying autoregressive moving average model that has multiple delays between the output and input. The controller minimises the sum of output tracking error variance...

Future Wireless Networks are expected to adopt multi-user multiple input multiple output (MU-MIMO) systems whose performance is maximized by making use of precoding at the transmitter. This chapter describes the recent advances in precoding design for MU-MIMO and introduces a new technique to improve the precoder performance. Without claiming to be comprehensive, the chapter gives deep introduc...

This paper considers high performance motion control systems for the Azimuth axis of a 2.4m Altitude-Azimuth telescope manufactured by Telescope Technologies Limited (TTL). Tracking performance is paramount and the telescope is designed to operate with no surrounding enclosure; wind disturbances that could degrade the tracking performance are a major consideration. Previous robust control desig...

This paper presents a unit vector based output-feedback model-reference adaptive control (UV-MRAC) for uncertain multi-input-multi-output (MIMO) linear systems. Some features of this new algorithm are: (i) Less restrictive a priori knowledge about the high frequency gain matrix of the plant is required. (ii) It applies to plants of any uniform relative degree. (iii) The closed loop system is ex...

The Multivariable Continuous-time Generalised Predictive Controller (CGPC) is recast in a state-space form and shown to include Generalised Minimum Variance (GMV) and an new algorithm, Predictive GMV (PGMV) as special cases. Comparisons are drawn with the exact linearisation methods of nonlinear control and it is noted that, unlike the transfer function approach, the state-space approach extend...

I N NONLINEAR systems theory two types of operators are especially important: linear time-inuariant (LTI) operators and memoryless or static nonlinear operators. Many important and well-known results pertain to systems which are interconnections of these operators, for example, the Popov criterion for the Lur’e structure. Indeed if multi-input multi-output (MIMO) operators are considered, all d...

In this paper, we propose a design method for a robust adaptive output feedback control system for uncertain MIMO nonlinear systems with a higher order relative degree and an uncertain controlled system order. By using a virtual input filter method, this method allows an adaptive output feedback control of MIMO nonlinear systems without constructing a state observer in the controller. Copyright...

Multi-Antenna systems are expected to play very important role in future multimedia wireless communication systems. Such systems are predicted to provide tremendous improvement in spectrum utilization. In this paper we consider the capacity analysis of Multiple-Input Multiple-Output (MIMO) systems. Space-Time coding schemes are the practical signal design techniques to realize the information t...

This paper presents a case study of the setpoint tracking performance proportional integral derivative (PID) controller on Single-Input Single-Output (SISO) and Multi-Input Multi-Output (MIMO) nonlinear digital plants under Gaussian white noise constant load disturbance for time-delay dynamic system. With objective getting better understanding discrete-time PID controller, we proposed using two...

During a revisit to modal identification in the past three decades, an overview of the major developments and issues in modal identification is motivated. A brief review on the progress from Single-Input/Single-Output (SISO), Single-Input/Multi-Output (SIMO) to Multi-Input/Multi-Output (MIMO) identification in frequency, time and spatial domain, is presented. The latest developments and issues ...