OFDM BASED RADCOM SYSTEM WITH IMPROVED PERFORMANCE USING DIGITAL BEAMFORMING TECHNIQUE

ABSTRACT In recent past the influence of Radar has played a significant part in various fields. Radar sensing is one of the prime application by which velocity and distance of a moving target can be found out. A joint RadCom system to serve both radar sensing and wireless communication is proposed which ensures better performance in terms of spectral efficiency, extended detection range and cost effectiveness. Such systems demand for a common waveform which is designed in this work that perfectly matches to the system requirements. OFDM multi carrier technique is chosen to generate a common waveform. Applicability of multiple antenna technique for direction of arrival estimation is also considered. MIMO-OFDM technique has gained much interest in the field of communication which improves the signal to noise ratio and lowers the bit error rate. On the other hand the usage of MIMO reflects in the form of interference between signals. In order to overcome this effect beamforming technique is used. In addition to theoretical explanations we have also simulated and discussed the results for the proposed RadCom system using MATLAB simulation tool. KEYWORDS RadCom, OFDM, MIMO, DBF, Doppler Effect, Radar Processing