scholarly journals Ka Band Holographic Imaging System Based on Linear Frequency Modulation Radar

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6527
Author(s):  
Yang Meng ◽  
Chuan Lin ◽  
Jiefeng Zang ◽  
Anyong Qing ◽  
Natalia K. Nikolova
Keyword(s):  
Spatial Resolution ◽  
Frequency Modulation ◽  
Imaging System ◽  
Low Cost ◽  
Three Dimensional ◽  
Reconstruction Algorithm ◽  
Linear Frequency Modulation ◽  
Planar System ◽  
Ka Band ◽  
Linear Frequency

Millimeter wave (MMW) technology is expanding rapidly into security screening for dangerous items concealed under clothing. It uses safe non-ionizing radiation and penetrates clothing well. We present a new planar system at Ka band for the three-dimensional simultaneous imaging of both sides of an inspected person where the images are produced in real time by a recently proposed generalized holographic reconstruction algorithm. Low-cost linear frequency modulation (LFM) radar technology is used along with a simple but efficient method for system calibration. Experimental characterization of the spatial resolution and the sensitivity of the system prototype has been carried out. It is established that the achieved spatial resolution is 6 mm or better if the item is not obscured by clothing and it may deteriorate to 7 mm depending on the clothing hiding the item. The spatial sensitivity is confirmed to be at least 2 mm.

scholarly journals Co-designed radar-communication using linear frequency modulation waveform

2016 ◽  
Author(s):  
Michael J. Nowak ◽  
Zhiping Zhang ◽  
Yang Qu ◽  
Dimitri A. Dessources ◽  
Michael Wicks ◽  
...  
Keyword(s):  
Frequency Modulation ◽  
Linear Frequency Modulation ◽  
Linear Frequency

scholarly journals Designing a waveform using LFM, NLFM for MIMO radar

2017 ◽  
Vol 7 (1.5) ◽  
pp. 84
Author(s):  
G S Krishnam Naidu Yedla ◽  
D. Siva Sankar Prasad ◽  
P. Raghavendra Rao ◽  
M Siva Kumar ◽  
M VenuGopala Rao
Keyword(s):  
Frequency Modulation ◽  
Frequency Component ◽  
Side Lobe ◽  
Mimo Radar ◽  
Linear Frequency Modulation ◽  
Wave Form ◽  
Boundary Segment ◽  
Middle Segment ◽  
Time Frequency ◽  
Linear Frequency

We propose a waveform that includes Linear frequency modulation and non linear frequency modulation wave applicable for MIMO radar. The wave form consists of three segments where the boundary segment consists of LFM content and the middle segment consists of NLFM. The time frequency component in the middle segment is controlled. The range and Doppler side lobe suppression is improved. The genetic algorithm is implemented to suppress the side lobes in the auto correlation and cross correlation functions. The performance is analysed by using ambiguity function.

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