Adaptive beam former algorithm architecture for SAR application

Digital beam forming in adaptive array system can be achieved by down converting frequency of received signal RF to IF-a low frequency that can be sampled and processed in real time by the digital signal processors. For this we need channel devices like low noise amplifier, down converter and band pass filter for every array elements i.e. for 16 times16 array antenna we need 16 times 16 channel devices for every array element. It can be avoided if we sample the signal with minimum redundancy. Signal processing is the most important part in smart antennas. It is the technology which is responsible for wide use of Adaptive (Smart) Antennas. In this paper we introduce DSP implementation of various standard Algorithms of Adaptive Beam forming. Here, we develop an algorithm which will be useful for adaptive beam forming in Smart antennas. It overcomes timing bottle necks and memory short comings. Further we plan to develop application for implementation of Reconfigurable Adaptive Beam former for SAR applications. We have written codes in Matlab for different SAR modes like strip map, scan mode etc for space borne SAR. Real time DSP can increase cost of implementation of DBF Array. We suggest here a cost effective array structure compared to conventional structure.