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.
Highlights
Radar operations involve radio frequency waves which is being transmitted, reflected from the specified target and received at the receiver
The prime consideration in combining radar and wireless communication is the need for common waveform that would be suitable for both the operations
MIMO is an important part of modern wireless communication standards such as WiFi, 4G, LTE and Wi-MAX etc
Summary
Radar operations involve radio frequency waves which is being transmitted, reflected from the specified target and received at the receiver. The reflected wave will have information about the target in terms of velocity with which it is moving, distance from the receiver, etc It undergoes Doppler shift which might result in loss of information in few cases, it’s noted that Doppler processing is taken into account for such systems. In order to get good bit error rate and data rate we go far OFDM multi carrier rather than single carrier signal Discrete modulation techniques such as phase shift keying (PSK) or quadrature amplitude modulation (QAM) is carried out in recent digital communications [5]. It applies perfectly for BPSK and QPSK signaling since it can withstand Doppler and fading. An OFDM multicarrier waveform is used to transmit the arbitrary data with the suitable channel coding techniques
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