A novel sequential algorithm for clutter and direct signal cancellation in passive bistatic radars

Abstract

Cancellation of clutter and multipath is an important problem in passive bistatic radars. Some important recent algorithms such as the ECA, the SCA and the ECA-B project the received signals onto a subspace orthogonal to both clutter and pre-detected target subspaces. In this paper, we generalize the SCA algorithm and propose a novel sequential algorithm for clutter and multipath cancellation in the passive radars. This proposed sequential cancellation batch (SCB) algorithm has lower complexity and requires less memory than the mentioned methods. The SCB algorithm can be employed for static and non-static clutter cancellation. The proposed algorithm is evaluated by computer simulation under practical FM radio signals. Simulation results reveal that the SCB provides an admissible performance with lower computational complexity.

Simplistic Simulation for Radar Based Life Signal Detection

“…In the meantime, picture gear reliant on the Doppler Effect using ultrasound have been helping prosperity experts in prosperity watching, either in definite yet also for supporting endless human administrations organizations. In a progressing work, The College of Fellows, American Institute for Medical and Biological Engineering (CF-AIMBE) contemplates that two of the six imperative troubles for remedial and natural structure in the 21st are planning altered human administrations and planning answers for harm and relentless diseases [3]. Altered therapeutic administrations is simply possible if appropriate data on each individual is open.…”

“…Ansari et al [3], have given a method for clutter removal which consist of sequential cancellation algorithm, extensive cancellation algorithm and sequential batch cancellation algorithm. After suppression of clutter CLEAN algorithm is used for target detection.…”

Weight Matrix-Based Representation of Sub-Optimum Disturbance Cancellation Filters

“…The pure block approaches include ECA and SCA (see [3]), while their batches Copyright © 2019 MECS I.J. Intelligent Systems and Applications, 2019, 10, 15-24 version (ECA-B, SCA-B), which are completely investigated in [4][5][6], along with RLS, LMS, and FBLMS (see [7]), are categorized under iterative filters. A range cell has the relation ⁄ with the delay , where is the sampling frequency.…”

“…A recursive cancellation algorithm (SCA) is presented as well in [3], to simplify the inverse matrix computation step in ECA. The ECA and SCA batches versions are suggested in [4,5] to save the required operational memory. Also, the capability of ECA-B technique for moving targets detection is investigated in [6] where diverse sources of illuminators are examined.…”

Direct path interference suppression for short‐range passive bistatic synthetic aperture radar imaging based on atomic norm minimisation and Vandermonde decomposition

“…Without suppressing the DPI, the targets are normally not detectable. Therefore, various methods have been proposed to confront this problem [21][22][23][24][25], including the CLEAN algorithm, least mean square (LMS) algorithm, fast and block LMS algorithm (FBLMS), extensive cancellation algorithm (ECA) and its variants, such as the batch based ECA (ECB) algorithm and the sequential cancellation batch (SCB) algorithm.…”