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Content Provider | IET Digital Library |
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Author | Irfan, Raafia Rasheed, Haroon ur Toor, Waqas A Ashraf, Muhammad |
Abstract | The most challenging task in phased array radar system is the mitigation or suppression of noise and interferences to enhance the useful signal in radar received signals. Multiple solutions have been proposed by researchers for suppression of unwanted signals or interferences which have highly degraded the overall system performance. Nowadays, space-time adaptive processor (STAP) which is a two-dimensional filtering technique is commonly used in phased array antenna with multiple spatial channels. A detailed study is performed on the well-known adaptive algorithms least mean square (LMS), normalized least mean square (NLMS) and recursive least square (RLS), to suppress the high state sea clutter by updating the adaptive STAP weight vector. However, RLS is considered as the suitable adaptive algorithm in STAP because of its good convergence rate, but has high computational complexity. To overcome this issue, two variants of RLS (QRD-RLS and Inverse QRD-RLS) are also discussed which reduce the computational complexity of the algorithm. MATLAB simulations are done to verify the performance of LMS and RLS algorithms in terms of accuracy and convergence rate. Finally, hardware implementations of STAP-QRD-RLS and STAP-IQRD-RLS adaptive beamformers are done and evaluated in terms of latency, throughput and efficiency. The selected platform is the Virtex-5 field-programmable gate array. |
Starting Page | 6313 |
Ending Page | 6317 |
Page Count | 5 |
Volume Number | 2019 |
e-ISSN | 20513305 |
Issue Number | Issue 19, Oct (2019) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2019/19 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0234 |
Journal | The Journal of Engineering |
Publisher | The Institution of Engineering and Technology |
Publisher Date | 2019-05-30 |
Access Restriction | Open |
Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
Subject Keyword | 2D Beamformers Adaptive Array Processing Algorithm Adaptive STAP Weight Vector Antenna Array Antenna Phased Array Array Signal Processing Computational Complexity Convergence Rate Filtering Method in Signal Processing Filtering Theory Interference Mitigation Interference Suppression Interpolation And Function Approximation Least Mean Square Least Squares Approximation Linear Antenna Array LMS MATLAB Simulations Multiple Spatial Channel Noise Mitigation Noise Suppression Numerical Analysis Optimised Single Precision Floating Point Complex Multiplier Performance Analysis Phased Array Antenna Phased Array Radar Phased Array Radar System QRD-RLS Radar Antenna Radar Clutter Radar Detection Radar Equipment Radar Received Signal Radar Signal Processing Recursive Least Square Signal Denoising Signal Detection Space-time Adaptive Processing Space-time Adaptive Processor STAP-IQRD-RLS Adaptive Beamformer STAP-QRD_RLS Adaptive Beamformer System And Application Target Detection Two-dimensional Filtering Technique ULA-based One-dimensional Filtering Technique Uniform Linear Array Unwanted Signal Suppression Vector Virtex-5 Field-programmable Gate Array |
Content Type | Text |
Resource Type | Article |
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