Beamforming Algorithm In Smart Antenna Based On Software Radio

Along with fast development in mobile communication business in the global , people call for more and more high request in capacity and quantity of communication. Increasing the frequency utilization is urgent, The development of the Smart Antenna brought new vital force into the whole wireless communication field. The core of smart antenna technology is beamforming algorithm. Finding an algorithm which is really fast convergent and has good performance is the key.Now a lot of classic beamforming algorithms and the developed beamforming algorithms are applied, for example LMS,DMI and CMA. This article primarily analyzed the principle of the MMSE and the MV filters, make procedure according to them. Make simulation for them under the condition that they have the different input signals. Analyze the result and the SINR, then obtain the two filters' work characteristic.It guide us to choose different algorithm according to the different conditions when we design Smart Antenna.Moreover this article researched a improved Smart Antenna algorithm. This algorithm could offer the biggest amplification in the direction of expected signal when the interference is in the subpetal.It can be proofed that the improved Smart Antenna algorithm have the advantage in simple calculation and have a good ability in anti-interference.