Generation wideband spread spectrum signals in computerized integrated systems

Предлагаются методы формирования и синтеза широкополосных сигналов с расширенным спектром, путем дополнительной модуляции по частоте или фазе на времени длительности сигнала. Приведены частотные и временные характеристики полученных сигналов. На основе указанных сигналов предложен метод и разработана технология построения сигнально-кодовой конструкции, позволяющая повысить значение коэффициента использования частотно-временного ресурса группового тракта систем передачи.The adaptive system of data transmission is considered. The technique of an assessment of information condition of a communication channel is offered. In the thesis work are presented methods and algorithms for implementing adaptive coding and technology of signal-code structures with broadband access construction. The ways and means of error-protection enhancement and effective use of time-frequency channel resource by using the universal software and hardware for error-protection are shown. The paper presents the technology of synthesis of signal-code structures on the basis of a system of signals with a comb spectrum and adaptive coding. A method of forming signals with artificially created comb spectra that belong to a class of broadband signals is presented, which allows more efficient use of transmission systems time-frequency resource by eliminating the guard intervals between the individual channels. The creation of such devices can improve the accuracy and speed of information transmission, with codec minimal redundancy, as well as efficient use of the frequency resource channel