Array Control Algorithm Based On Amrfc Study

As the development of science and technology, the role of the modern navy continues to require higher levels of technology. Throughout the history of the development of electronic technology, the multiplexing of electronic resources with many tasks has always been the direction of the development of electronic systems. At present, the shipboard systems including radar, electronic warfare and communications systems are still at low integration level, AMRFC (Advanced Multifunction Radio Frequency Concept advanced multifunction RF concept) thus came into being. AMRFC test from the Department of Naval Research-funded project is used to demonstrate an RF functions integration system which uses a sharing set of broadband aperture, signal and data processing, signal generation and display hardware.Because shipboard systems include radar, electronic warfare and communications systems, the whole shipboard system needs to deal with the signal with frequency from 6GHz to 18GHz. Therefore, in order to enable them to adapt to the needs of various systems, it is necessary to control the transmit array and receive array reasonablely. On the other side, because the above systems usually use large-scale arrays with more than thousands of sensors; consider from implementation and cost aspects, it is necessary to divide those sensors into many subarays and control these subarrays effectively. This article focuses on sub-array control study. Detailed researches and innovation are about the following aspects:1. An overview of the basic principles of beamforming, as well as the principle of sub-array division and the problems result from subarray division. Firstly, the narrow-band signal and broadband signal model are given as basic theory. Secondly, analyzed some problems of using phase-shifter for controlling the array, under the condition that the transmit signals and receive signals with wide frequency coverage, at last conducted some simulation experiments and given analysis of simulation results.2. According to the characteristics of array manifold, this article analyzed the reasons of beamforming errors caused by using phase shifter under the wide-band signal condition, and carried out some simulation of it, further more, did some comparison of simulation results. This article further elaborated the principle of true-time-delay as well as the advantages of using it, at last, done some simulation experiments of using the true-time-delay technology, and analyzed simulation results of the system.3. Under the condition that, two arrays pointing to different directions bring out direction offset, we did some simulation experiments and drew the conclusion that, when the direction of subarray is relatively constant, the final direction of entire synthetic array point to will exist between the expectations direction and that Subarray point to. Based on the conclusion, one-dimensional search method was brought, which is demonstrated as, there will be an angle point exist in the range larger than the expectation direction to match our target. So if we search the range larger than expectation direction, we can find the right point with Maximum gain definitely to be our match weighting for the upper array.4. According to the space filtering theory, this article put forward another idea called two-level filter method, which says, the weights of the two levels arrays (subarrays and upper array) should be treated as two levels of filters. And, rebuild the beam of subarray according to our requirements to make them have the same largest gain in the range of direction ruled by project requirements. Further more use them to get our expectation.5.The implementation of the one-dimensional method based on TS201S, and compared the results get from TS201S with that from MATLAB.