Research the Information Channels in Systems with Combined Data Using CDMA Method

Abstract

Research of technology CDMA has been made for use of data transmission in systems from the combined data and power supply transmission. As is known principles of code division of channels, are based on use of broadband signals which strip considerably exceeds the strip of frequencies necessary for usual message transfer, for example, in narrow-brand systems with frequency division of channels. In the article, As a result of multiplication of noise with an information signal energy of the last is distributed in a wide strip of frequencies. Its Spread spectrum, expansion of a spectrum with a passed signal, which is carried out by means of pseudorandom device for decoding the message should know coding sequence.