Study Of System Setting And Data Analysing Of Amplitude And Phase Of Dbf Systems

Design of satellite multi-beam antenna has become a key technology to improve satellite communicating performance and reduce the cost of the system. With the development of digital signal processing technology, digital beam-forming has become an important part in the field of array antenna technology. Based on the beam-forming technology, we basically have finished the hardware part of the multi-beam forming system and multi-channel system. To actually put these two systems into use, we study the upper computer functions. In this paper, we discuss system setting and data analyzing according part.In this paper, I draw up several protocols for upper computer to communicate with FPGA. The protocols can be used generally for both sending system and receiving system. Secondly, I analyze the decorrelation theory and ambiguity resolution theory, by which to process data of setting and testing results. These mathematical theories are used to eliminate the interference between co-frequency multi-beams, to calibrate the frequency offset and system errors. The accuracy requirement of the test system: 0.1dB for amplitude and 1°for phase.Besides, I build a man-machine interaction software that has strong ability for data processing and storage in window operating system. By clicking some buttons on the software system users can complete any testing function easily and conveniently.In this paper, a parallel calibration method is proposed for satellite-borne phased array antennas. The method provides the relationship between the SNR and the calibration accuracy with orthogonal codes and nonorthogonal codes, which is also demonstrated by simulation results.