Simulation of generator frequency stabilization in infocommunication systems

Abstract

The investigation objective is to simulate the process of generator frequency stabilization as in the case of a component of the cellular system “switching centre - base station”. The aim of the work is to establish dependences between the generator parameters (a number of generators, operation frequencies, and relative instability of frequencies) and the generator frequency stability. The study is based on the application of the numerical analytic model of the generator signals, and on the construction of the plausibility function when the unbiased, asymptotically efficient and consistent estimates of each generator are specified from the maximum condition. The research suggests the following results. Under the cooperative processing of the measured values of the signal phases of the simultaneously and independently operating generators, the unbiased, asymptotically efficient and consistent estimates of the generator frequencies may be obtained. This ensures the frequency stability augmentation. The use of the numerical simulation allows estimating gain in reducing the relative instability of the frequency signals depending on such infocommunication system parameters as a number of generators and their relative instability.

Keywords

• инфокоммуникационные системы
• помехоустойчивость системы цифровых каналов связи
• моделирование случайных процессов
• стабильность частоты
• вероятность битовой ошибки
• infocommunication systems
• interference immunity of digital channel system
• stochastic process simulation
• frequency stability
• bit error probability