We report on the development of algorithms for solving the Quadratic 3-dimensional Assignment Problem (Q3AP). The application is a hybrid ARQ scheme for enriching diversity among multiple packet transmissions by optimizing the mapping of transmission symbols to data. Our current exact algorithm, based on a reformulation linearization technique, solves Q3AP instances of size 13 or smaller. Our f...

Absrracl A highly linear CMOS RF amplifier and mixer circuits adopting MOSFET transconductance linearization bv linearlv suoemosine several commonTherefore it is very important to linearize MOSFET transconductance for both RF amplifier and mixer circuits. We have shown that multide eated transistor (MGTR) 111 ~ _ . source FET transistors in parallel, combined with some additional circuit techni...

This paper presents a nonlinear control concept of a planar multi-axis servohydraulic test facility. Based on nonlinear model equations including servohydraulic actuator dynamics and test table and payload mechanics a global nonlinear diffeomorphism is derived which maps the model equations into nonlinear canonical form. A nonlinear control law is derived using exact linearization techniques. T...

A low-voltage low-power analog CMOS exponential function generator is designed in 0.18μm CMOS standard technology. The proposed circuit uses Taylor’s approximation concept and consists of a linear low-voltage transconductance with two linearization techniques and one low-voltage current squarer circuit for performing this approximation method. Simulation results using HSPICE shows 60 dB-linear ...

Recent technology improvements are leading to significant advances in telecommunications. New sub-micron technologies allow us to design high speed digital processors and high-speed, high-resolution data converters. These basic components push the analog-digital border close to the antenna and favor the implementation of complex digital algorithms. Various system architectures are examined and ...

This article is concerned with geometric integrators which are linearization-preserving, i.e. numerical integrators which preserve the exact linearization at every fixed point of an arbitrary system of ODEs. For a canonical Hamiltonian system, we propose a new symplectic and self-adjoint B-series method which is also linearization-preserving. In a similar fashion, we show that it is possible to...

Geometric algebra is a universal mathematical language which provides very comprehensive techniques for analyzing the complex geometric situations occurring in robotics and computer vision. The application of the 4D motor algebra for the linearization of the the hand-eye calibration problem is presented. Geometric algebra and its associated linear algebra framework is a very elegant language to...

This paper investigates the adaptive control design for a class of nonlinear systems using Lyapunov’s stability theory. The proposed method is developed based on a novel Lyapunov function, which removes the possible controller singularity problem in some of the existing adaptive control schemes using feedback linearization techniques. The resulting closed-loop system is proven to be globally st...

This work combines the advantages of two different RF power amplifier (PA) linearization techniques: digital predistortion (DPD) and Cartesian feedback (CFB). Cartesian feedback, an extension of classical continuoustime feedback, is limited by the bandwidth of its loop transfer function; this bandwidth, in turn, puts an upper limit on the bandwidth of the data input. However, this limitation gi...

We present a change detection method for nonlinear stochastic systems based on particle filtering. We assume that the parameters of the system before and after change are known. The statistic for this method is chosen in such a way that it can be calculated recursively while the computational complexity of the method remains constant with respect to time. We present simulation results that show...