The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper we discuss the design of clustering scheme of CFAR image map to identify distinct targets present in the coherent processing interval (CPI). Detections out of a CFAR are conventionally grouped together using a fixed size window. This window scans over the set of detections and groups all those that lie in proximity to the peak detections. This clustering process is carried out till all...
MIMO radar covers a broad class of systems having multiple antennas at transmit and/or receive. The performance of the MIMO radar varies widely based on the system configuration. The waveform for MIMO radar can be orthogonal or correlated. In case of correlated waveform the covariance matrix has to be decided based on various system parameters before proceeding to waveform design. In many scenarios...
The management of radar resources plays a key role in harnessing all the benefits the radar provides, be it phased array radar or MIMO radar. In recent past, MIMO radar has received lot of attention from researchers. MIMO radar can be deployed in many configurations based on the end goal to be achieved. Broadly, there are two different configurations of MIMO radar viz., statistical MIMO and coherent...
This paper proposes to use stepped FM for different transmit subapertures for achieving high range resolution. Use of stepped FM for different sub-apertures provides the capability of Doppler processing and the proposed scheme is motivated by the use of stepped FM across pulses as proposed in literature. It enables Doppler processing and also partially mitigates the limitation of target velocity compensation...
Multiple Signal Classification (MUSIC) is one of the efficient super resolution algorithms, which can be used for angular super resolution in Radars. The large antenna array is divided into sub arrays and only sub array outputs are used to estimate the spatial spectrum in order to reduce the system complexity and computational load. Only local super resolution can be achieved with sub array outputs...
This paper illustrates the two different approaches for implementation of an adaptive filter using QRD-RLS (Q R decomposition based Recursive Least Squares) algorithm for Phased Array Radar application. One approach involves back substitution procedure whereas another involves updating of inverse data matrix. The former approach is called as Conventional QRD-RLS and the later is called as Inverse...
This paper describes architecture for a digital beam former developed for 16 element phased array radar. The digital beam former architecture includes the complex operations such as down conversion which is done in parallel for the signal coming from each of the antenna elements and the filtering. A high performance FPGA is employed to perform these operations. An echo signal of 5 MHz riding on the...
MIMO radar provides improvements in different system parameters but suffers from SNR and sidelobe level (SLL) degradation. It is shown in this paper that the improvement in beamwidth for fully filled transmit-receive array is achievable only if degradation in peak SLL is acceptable. It is also shown that improvement in beamwidth becomes evident only for sparse array at transmit-receive. SNR degradation...
A new proximity-coupled patch antenna is designed using a novel concept for wide impedance bandwidth of 2.3 GHz that corresponds to an impedance bandwidth of 30% (S11<-10 dB) around a center frequency of 7.5 GHz. The antenna provides hemispherical pattern. The radiation patterns obtained from simulations are found to be closely matching with experimental values. The gain of the antenna is better...
An attempt is made to achieve a wide band antenna element with low return loss for a surveillance radar application. A stepped probe fed capacitively coupled patch is chosen and the step size & step length are optimized to give 20% bandwidth for 20dB return loss or 40% bandwidth for 10dB return loss
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.