On the Implementation of AM/AM AM/PM Behavioral Models in System Level Simulation

The use of nonlinear device behavioral models offers an economical way of simulating the performance of complex communication systems. A concrete method for implementing the AM/AM AM/PM behavioral model in system level simulation using ADS is developed. This method seamlessly tansfers the data from the circuit level simulation to system level simulation, where the AM/AM AM/PM model is automatically built. The methodology is extendible for use in other software packages or between different software packages

On the Analysis of Quasi-Static Bandpass Nonlinearities Using Volterra Series

This paper reexamines the AM-AM and AM-PM data-based behavioral model of a narrowband quasistatic nonlinear system via Volterra series analysis. It is shown that, under narrowband input signal and flat basedband impedance assumptions, the model is in compliance with bandpass nonlinearity theory. Consequentially, there exists a relationship based on the Chebyshev-Fourier transform between the nonlinearity's one tone and two tone AM-AM transfer functions

Novel wireless modulation technique based on noise

In this paper, a new RF modulation technique is presented. Instead of using sinusoidal carriers as information bearer, pure noise is applied. This allows very simple radio architectures to be used. Spread-spectrum based technology is applied to modulate the noise bearer. Since the transmission bandwidth of the noise bearer can be made very wide, up to ultra-wideband regions, extremely large processing gains can be obtained. This will provide robustness in interference-prone environments. To avoid the local regeneration of the noise reference at the receiver, the Transmit-Reference (TR) concept is applied. In this concept, both the reference noise signal and the modulated noise signal are transmitted, together forming\ud the bearer. The reference and modulated signals are separated by applying a time offset. By applying different delay times for different channels (users) a new multiple access scheme results based on delay: Delay Division Multiple Access (DDMA). A theoretical analysis is given for the link performance of a single-user and a multi-user system. A testbed has been built to demonstrate the concept. The demonstrator operates in a 50 MHz bandwidth centered at 2.4 GHz. Processing gains ranging from 10¿30 dB have been tested. The testbed confirms the basic behavior as predicted by the theory

CAD-tool for integrated optics

A CAD-tool for simulation and design of integrated optical circuits, based on a professional microwave design system is reported. An example describing the complete design and simulation of a MZI switch is give