Research And Implementation Of Broadband High-powered Signal

Wireless communication becomes more and more important in current distance communication. In order to get wider passband and larger capacity of communication, we need to study the implementation of broadband high-powered signals.There are two kinds of basic methods to generate broadband signal, namely simulation and digital methods. Digital methods can be divided into the direct digital synthesis and waveform storage. According to basic principles, different characteristics of these methods have been studied. Firstly, a scheme of the broadband signal generation with practical values is chosen for the system based on previous research and how to get high-speed signals based on FPGA hardware processing platform is discussed in this paper.Phased array antenna, which has characteristics of low profile, easy conformal, quick track speed and so on, is the trend of communication antenna technology. Phased array antennas can obtain high transmit power by the principle of"power-combining". Phased array can use a centralized high-powered transmitter or distributed one. From the basic principle of spatial power combining, different implementations of the phased array transmitter have been researched and the appropriate one is selected according to their both advantages and disadvantagesIn order to get multi-carrier wideband signals that can precisely control initial phase and amplitude, broadband signal generator and phased array antenna are designed based on basic theory .This method can solve the problem of synchronization of multiple signals and control beam control in baseband. Further, it ensured the efficiency of spatial power combining, simplified the hardware equipment, improved the reliability of the system, and achieved the generation of the broadband high-powered signals.