Synthesis of Finite Length Multi Level Sequences for Clutter Rejection in Radar

Rosli, Siti Julia; Farid, Ghulam; Ghani, Alif Hasmani Abd.; Ahmad, Robiah

doi:10.1109/cicsyn.2012.58

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…The designation of HMSCACSA-IF, which amalgamated both HMSCACSA with the IF method, was aimed to optimize the LABS more effectively. Three hypotheses of the postulated HMSCACSA successfully achieved as described in [50], which were the fastest convergence rate, best means, and standard deviation values in the following minimum or maximum of single objective optimization which had been decided. This was achieved in the third phase of the parameter sensitivity validation analysis for the HMSCACSA-IF.…”

Section: Results On Large Skew Symmetric Sequencesmentioning

confidence: 99%

See 1 more Smart Citation

A Hybrid Modified Sine Cosine Algorithm Using Inverse Filtering and Clipping Methods for Low Autocorrelation Binary Sequences

Rosli¹,

Rahim²,

Rani³

et al. 2022

CMC

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The essential purpose of radar is to detect a target of interest and provide information concerning the target's location, motion, size, and other parameters. The knowledge about the pulse trains' properties shows that a class of signals is mainly well suited to digital processing of increasing practical importance. A low autocorrelation binary sequence (LABS) is a complex combinatorial problem. The main problems of LABS are low Merit Factor (MF) and shorter length sequences. Besides, the maximum possible MF equals 12.3248 as infinity length is unable to be achieved. Therefore, this study implemented two techniques to propose a new metaheuristic algorithm based on Hybrid Modified Sine Cosine Algorithm with Cuckoo Search Algorithm (HMSCACSA) using Inverse Filtering (IF) and clipping method to achieve better results. The proposed algorithms, LABS-IF and HMSCACSA-IF, achieved better results with two large MFs equal to 12.12 and 12.6678 for lengths 231 and 237, respectively, where the optimal solutions belong to the skew-symmetric sequences. The MF outperformed up to 24.335% and 2.708% against the state-of-the-art LABS heuristic algorithm, xLastovka, and Golay, respectively. These results indicated that the proposed algorithm's simulation had quality solutions in terms of fast convergence curve with better optimal means, and standard deviation.

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Section: Results On Large Skew Symmetric Sequencesmentioning

confidence: 99%

“…The optimization problem is to select the filter sequence {f i } of length (m+1) to reduce the energy consumption of {e i } error series. The details of IF method is provided in [50].…”

Section: Inverse Filtering Methodsmentioning

confidence: 99%

A Hybrid Modified Sine Cosine Algorithm Using Inverse Filtering and Clipping Methods for Low Autocorrelation Binary Sequences

Rosli¹,

Rahim²,

Rani³

et al. 2022

CMC

View full text Add to dashboard Cite

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“…It has the flexibility to dispose the noise ratio to improve the ER in that pulse trains. The ER valued is greater than original sequences but have poor characteristic of SLE compared between modified and without modification sequences but from the performance result it was efficient and flexible implementation compared the another methods, where it is the combination of 'inverse filtering' and 'clipping' provides a method of generating waveforms that have desirable properties for improving the range and Doppler resolution of radar [13][14][15].…”

Section: Discussionmentioning

confidence: 99%

Design of amplitude and phase modulated pulse trains with good auttocorrelation properties for radar communications

Rosli¹,

Rahim²,

Rani³

2019

IJEECS

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Development of technique for synthesizing multilevel sequences with good correlation properties is very useful for several radar applications where as a set of phase and amplitude coded sequences will be synthesized directly for compression technique. In reality, the signal processing also been significant to transmit or store signals, to enhance desired signal component and to extract useful information carried by signals. Consequently, this paper describes affectively methods to generating the finite length multilevel sequence of any length that have low side lobe energy (SLE) and improved energy ratio (ER) in their autocorrelation function (ACF). Testing for the stability and the analyzing of systems zero pattern using z-transform for the generating sequence indicates a possible position of roots in the radius of circle lies. This is illustrated by application of 13-element Huffman code as a starting sequence, this technique more low complexity and compatible compared inverse filtering technique.

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Design of Binary Coded Pulse Trains with Good Autocorrelation Properties for Radar Communications

Rosli

Rahim

Ngadiran

et al. 2018

MATEC Web of Conferences

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Finite length of sequences that are modulated both in phase and amplitude and have an ideal autocorrelation function (ACF) consisting of merely a pulse have many applications in control and communication systems. They are widely applied in control and communication systems, such as in pulse compression systems for radar and deep-space ranging problems [1-5]. In radar design, the important part is to choose a waveform, which is suitable to be transmitted because the waveform controls resolution in clutter performance. In addition, it can solve a general signal problem particularly related to the digital processing. Energy ratio (ER), total side lobe energy (SLE), and peak sidelobe level (PSL) are three properties of such sequences interest. This paper presents a method using the Complementation, Cyclic Shift and Bit Addition for synthesizing and optimizing a binary sequence implemented to improve the sequences of a similar quality with the Barker sequence, particularly for lengths greater than 13. All of these methods are guided by the specific parameter with good characteristics in ACF (ER, SLE, and PSL) [6,7,8]. Such sequences can then be effectively used to improve the range and Doppler resolution of radars.

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Synthesis of Finite Length Multi Level Sequences for Clutter Rejection in Radar

Cited by 3 publications

References 9 publications

A Hybrid Modified Sine Cosine Algorithm Using Inverse Filtering and Clipping Methods for Low Autocorrelation Binary Sequences

A Hybrid Modified Sine Cosine Algorithm Using Inverse Filtering and Clipping Methods for Low Autocorrelation Binary Sequences

Design of amplitude and phase modulated pulse trains with good auttocorrelation properties for radar communications

Design of Binary Coded Pulse Trains with Good Autocorrelation Properties for Radar Communications

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