Showing 1-25 of 10,680 resultsfor "Index Terms":Incident Signal
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Robust Direction of Arrival Estimation with Time Modulated Arrays using Modified MUSIC Algorithm
2024 11th International Conference on Advances in Computing and Communications (ICACC)
Year: 2024 | Conference Paper |
This paper proposes a robust direction of arrival estimation scheme using Modified MUSIC algorithm for Time-Modulated Linear Antenna arrays for, both coherent and non-coherent, low SNR signals. The performance of the proposed method is further verified for varying number of elements, inter-element spacing, incident angles, and SNR values and compared with the MUSIC algorithm. The simulation result...Show More
Through studying the RCS of the rotary bullet pill with slot and the relationship between its RCS and its flying attitude, a new type of system is established, which can get the rotate speed, swing cycle and pose angle of the rotary pill from the data of a velocity radar, by using the ordinary velocity radar and processing the signal of the radar. Then, the terrain of velocity radar is much enlarg...Show More
In a multipath communication scenario, it is often relevant to estimate the directions and relative delays of each multipath signal. We present an effect algorithm for the simultaneous estimation of these parameters by re-iterative super-resolution, beamforming, and MUSIC-like searching techniques. The algorithm first separates and estimates direction of arrival (DOA) of the multipath signals. Lin...Show More
Reduced-Rank MDL Method for Source Enumeration in High-Resolution Array Processing
This paper proposes a reduced-rank minimum description length (MDL) method to enumerate the incident waves impinging on a uniform linear array (ULA). First, a new observation data and a reference signal are formed from sensor data by means of the shift-invariance property of the ULA. A cross-correlation between them is calculated, which is able to capture signal information and efficiently suppres...Show More
A hybrid signal source signal statistics and localisation algorithm
2023 IEEE 6th Information Technology,Networking,Electronic and Automation Control Conference (ITNEC)
Year: 2023 | Conference Paper |
Cited by: Papers (1)
The localisation of mixed signal sources includes the localisation of far-field signal and near-field signal source, which are prone to false alarms (more spectral peaks than signals) or missed alarms (fewer spectral peaks than signals) when using the traditional two-step MUSIC estimation. In order to accurately locate all signal sources’ position, the number of far-field signal and near-field sig...Show More
A new vector field smoothing algorithm for direction-of-arrival (DOA) estimation of multiple coherent, underwater acoustic signals is proposed based on the array with vector hydrophones, which is located at or near a reflecting boundary. The performance of the proposed algorithm is examined in two practical applications: hull-mounted and seabed array. The advantage of the vector field smoothing sc...Show More
New DOA algorithm using subspace projection and synthetic spatial spectrum
2013 6th International Conference on Information Management, Innovation Management and Industrial Engineering
Year: 2013 | Conference Paper |
In this paper, we propose a new direction of arrival (DOA) estimator for sensor-array processing. The estimator we propose is a modified weighted noise subspace of MUSIC algorithm (MWNSM). The algorithm is to solve the problem that the MUSIC algorithm has a strong depends on the signal-to-noise ratio (SNR) and snapshots. The new method reconstructs the spatial spectrum function with both noise sub...Show More
A new technique for resolving different directions (or times) of arrival beyond the Rayleigh diffraction limit is presented. It is based on the Euclidean Algorithm for polynomial factorization and is implemented as a simple polynomial division (deconvolution) followed by a polynomial-root search. Similar to other super-resolution techniques, it reflects the exchangeability between bandwidth and si...Show More
A new technique for resolving different directions (or times) of arrival beyond the Rayleigh diffraction limit is presented. It is based on the Euclidean Algorithm for polynomial factorization and is implemented as a simple polynomial division (deconvolution) followed by a polynomial-root search. Similar to other super-resolution techniques, it reflects the exchangeability between bandwidth and si...Show More
Fast DOA estimation algorithm using pseudocovariance matrix
This paper proposes a new direction of arrival (DOA) estimation algorithm that can rapidly estimate the DOAs of incidence signals using a pseudocovariance matrix even under coherent interference environments. The conventional multiple signal classification (MUSIC) algorithm, which should estimate a covariance matrix, cannot perform a DOA estimation until it acquires the covariance matrix. In addit...Show More
Denoised Modified Incoherent Signal Subspace Method for DOA of Coherent Signals
2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)
Year: 2018 | Conference Paper |
Cited by: Papers (5)
Incoherent signal subspace method (ISM) is ineffective to deal with direction of arrival (DOA) of coherent wideband signals. Although modified methods were proposed to solve this drawback, such as ISM based on modified MUSIC (MMUSIC-ISM), their performance wm seriously deteriorate when the signal-to-noise ratio (SNR) is low. This paper proposes a method to construct the covariance matrix, namely d...Show More
Multidimensional Parameters Estimation of Array Signal via Single Signal Subspace
2008 IEEE International Symposium on Knowledge Acquisition and Modeling Workshop
Year: 2008 | Conference Paper |
This paper exploits rotation invariance of matrix pencil based on two parallel uniform linear polarization sensitive arrays, and eigenvalues and the corresponding eigenvectors of the matrix pencil are the rotation matrix and time-space-polarization steering vector of the subarray, respectively. The eigenvalues and steering vector can be used to estimate frequency, two-dimensional angles and polari...Show More
An effective DOA estimation method of coherent signals based on reconstruct weighted noise subspace
2017 29th Chinese Control And Decision Conference (CCDC)
Year: 2017 | Conference Paper |
Cited by: Papers (2)
For the problem that traditional DOA (Direction Of Arrival) estimation algorithms often fail to deal with coherent signals, a new high accuracy DOA estimation method based on weighted noise subspace is proposed. Considering the received data matrix obtained by uniform liner array, the proposed method makes full use of the cross-covariance information of it to construct an augmented matrix and perf...Show More
ML estimation and CRB for narrowband AR signals on a sensor array
2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Year: 2014 | Conference Paper |
This paper considers the exploitation of temporal correlation in incident sources in a narrowband array processing scenario. The MLE and CRB are derived for parameter estimation of spatially uncorrelated first order Gaussian autoregressive source signals with additive Gaussian spatially and temporally uncorrelated sensor noise. These are compared to the MLE and CRB for the usual uncorrelated (WN) ...Show More
Robust Adaptive Beamforming Algorithm using Instantaneous Direction of Arrival with Enhanced Noise Suppression Capability
2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07
Year: 2007 | Conference Paper |
In this paper, we propose a novel adaptive beamforming algorithm with enhanced noise suppression capability. The proposed algorithm incorporates the sound-source presence probability into the adaptive blocking matrix, which is estimated based on the instantaneous direction of arrival of the input signals and voice activity detection. The proposed algorithm guarantees robustness to steering vector ...Show More
Sequential mode adaptive array processing
1993 IEEE Aerospace Applications Conference Digest
Year: 1993 | Conference Paper |
An approach to operating and processing adaptive arrays to automatically sense and eliminate unwanted signals in the radar echoes while enhancing the reception of the desired target returns is presented. The algorithm is based on synthetic sample aperture radar (SSAMAR) operation and signal processing. No matrix inversion is required, and the weights are computed in a scalar fashion. Jammers are n...Show More
Estimation of Direction of Arrival(DOA) Based on the Spatial Kurtosis Spectrum
2021 International Conference on Information Science, Parallel and Distributed Systems (ISPDS)
Year: 2021 | Conference Paper |
Low signal-to-noise ratio (SNR) and weak signal direction of arrival (DOA) estimation have important implications in target orientation and signal separation. However, in the case of unknown number of source signals, traditional DOA estimation requires source number estimation in advance. At low SRN and weak signals, the source number estimation accuracy is low, leading to DOA estimation errors. I...Show More
Wideband Signal DOA Estimation By Using Sparse Representation Technique with An Acoustic Vector Sensor Array
2021 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC)
Year: 2021 | Conference Paper |
Cited by: Papers (1)
In order to improve the accuracy of wideband signal direction-of-arrival (DOA) estimation, an acoustic vector sensor array based DOA estimation method by using joint sparse representation and sparse reconstruction is proposed in this paper. According to the sparse signal decomposition theory, constructing the sparse representation model based on the wideband signal frequency-domain covariance matr...Show More
Joint signal detection and recovery via Blind Signal Separation
2010 IEEE International Conference on Wireless Communications, Networking and Information Security
Year: 2010 | Conference Paper |
Cited by: Papers (2)
Blind Signal Separation has the ability of recovering the desired signals from array inputs with an information of the source number. Based on the multistage constant modulus (CM) array, a new method was proposed to detect and recover the desired signals simultaneously. A detector based on the Generalized Likelihood Ratio Test (GLRT) was included in each stage CM array to determine the final stage...Show More
Direction finding with mutually orthogonal antennas
D. F. Chick;P. J. Collins;S. A. Goodman;R. K. Martin;A. J. Terzuoli
2011 IEEE International Symposium on Antennas and Propagation (APSURSI)
Year: 2011 | Conference Paper |
Electromagnetic direction finding using a set of three mutually orthogonal antennas is studied. The vector effective height concept from antenna theory is employed to develop three direction finding algorithms for use with the proposed antenna arrangement. The first algorithm estimates the direction-of-arrival by computing a vector that is perpendicular to the locus of the instantaneous electric f...Show More
In previous work, we proposed an improved Orthogonal Matching Pursuit (OMP) based local refining strategy, which is named LROMP_DOA. It turns out that LROMP_DOA is an efficient method for narrowband signal, which has significant higher bearing resolution and accuracy, compare with the conventional OMP_DOA. In this paper, we propose a coherent subspace method for extension of the LROMP_DOA to wideb...Show More
DOA estimation Of Underwater Wideband Signals based on Improved OMP method
Year: 2019 | Conference Paper |
Separation of Cogerent Multi-path Signals with Improved MUSIC Algorithm
2011 International Conference on Computational and Information Sciences
Year: 2011 | Conference Paper |
Cited by: Papers (3)
MUSIC algorithm is an effective method for direction of arrival(DOA), but it can only do with incoherent signals. There are coherent signal and related signal in the actual communication environment. If the condition does not meet, there will be bias occured and even failure in the use of MUSIC algorithm for signal DOA estimation. In order to solve the problem of the DOA estimation of coherent sig...Show More
Joint Adaptive Beamforming Based on Distributed Moving Platforms
2018 IEEE 23rd International Conference on Digital Signal Processing (DSP)
Year: 2018 | Conference Paper |
A distributed sensor array network consisting of sub-arrays with arbitrary locations and rotation angles placed on unmanned aerial vehicle (UAV) platforms is studied, where narrowband electro-magnetic waves are sent out by a transmitter, and the echo signals reflected from the targets are then received by the distributed UAV system. Based on this model, a joint reference signal based beamformer is...Show More
Optical Signal-to-Noise Ratio Monitoring Using a Sagnac Interferometer Based on Fiber Birefringence
IEEE Photonics Technology Letters
Cited by: Papers (3)
We propose a novel optical signal-to-noise ratio (OSNR) monitoring scheme using a Sagnac interferometer based on fiber birefringence. The proposed OSNR monitoring scheme is demonstrated in single and dual polarization systems, which shows incident polarization independence and dispersion insensitivity.Show More
Comparison of Amplitude Modulated LIDAR System Underwater Detection
2012 Fifth International Symposium on Computational Intelligence and Design
Year: 2012 | Conference Paper |
In order to suppress backscattering signal and improve resolution of underwater target, 3 different amplitude modulation methods are studied. They are general amplitude modulation, Fabry-Perot amplitude modulation and dual cosine superimposed amplitude modulation. by comparing the simulation results, the dual cosine superimposed amplitude modulation gets the best effect on suppressing backscatteri...Show More
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