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Journal articles on the topic 'Frequency invariant beamformer'

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Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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1

Xie, Ning, Hui Wang, and Hongwei Liu. "Broadband Frequency Invariant Beamformer." Wireless Personal Communications 61, no. 1 (May 22, 2010): 143–59. http://dx.doi.org/10.1007/s11277-010-0015-7.

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2

Wei Liu, D. C. McLernon, and M. Ghogho. "Design of Frequency Invariant Beamformer Without Temporal Filtering." IEEE Transactions on Signal Processing 57, no. 2 (February 2009): 798–802. http://dx.doi.org/10.1109/tsp.2008.2008557.

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3

Yan, Shefeng. "Optimal design of FIR beamformer with frequency invariant patterns." Applied Acoustics 67, no. 6 (June 2006): 511–28. http://dx.doi.org/10.1016/j.apacoust.2005.09.008.

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4

Du, Rui, Yangyu Fan, and Jianshu Wang. "Design of Fixed Wideband Beamformer through Improved Maximum Energy Approach." Journal of Electrical and Computer Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/7912364.

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A maximum energy approach is investigated in this paper to design fixed wideband beamformer. This approach has been improved by integrating response variation (RV) into the target function to maintain the frequency invariant property of wideband beamformer over the whole passband. Two methods for designing null to suppress interference signal also have been proposed to make the wideband beamformer robust in complicated environment. Comparisons among other methods are provided to illustrate the effectiveness and enhancement of performance of the new approaches.

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5

Greco, Danilo, and Andrea Trucco. "Superdirective Robust Algorithms’ Comparison for Linear Arrays." Acoustics 2, no. 3 (September 22, 2020): 707–18. http://dx.doi.org/10.3390/acoustics2030038.

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Frequency-invariant beam patterns are often required by systems using an array of sensors to process broadband signals. In some experimental conditions (small devices for underwater acoustic communication), the array spatial aperture is shorter than the involved wavelengths. In these conditions, superdirective beamforming is essential for an efficient system. We present a comparison between two methods that deal with a data-independent beamformer based on a filter-and-sum structure. Both methods (the first one numerical, the second one analytic) formulate a mathematical convex minimization problem, in which the variables to be optimized are the filters coefficients or frequency responses. The goal of the optimization is to obtain a frequency invariant superdirective beamforming with a tunable tradeoff between directivity and frequency-invariance. We compare pros and cons of both methods measured through quantitative metrics to wrap up conclusions and further proposed investigations.

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6

Yong Zhao and Wei Liu. "Robust Fixed Frequency Invariant Beamformer Design Subject to Norm-Bounded Errors." IEEE Signal Processing Letters 20, no. 2 (February 2013): 169–72. http://dx.doi.org/10.1109/lsp.2012.2237028.

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7

Zhang, Weicheng, and Zengping Chen. "Design of Frequency Invariant Wideband Beamformer with Real and Symmetric FIR Filters." Defence Science Journal 62, no. 4 (July 6, 2012): 243–47. http://dx.doi.org/10.14429/dsj.62.965.

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8

Cho, Kyeongwon, Kyoung Won Nam, Jun Chang Lee, Sung Hwa Hong, See Youn Kwon, Jonghee Han, Dongwook Kim, Sangmin Lee, and In Young Kim. "A comparison of frequency-invariant beamforming algorithms for hearing aids: Differential microphone-based beamformers and the broadband beamformer." Biomedical Engineering Letters 4, no. 2 (June 2014): 166–75. http://dx.doi.org/10.1007/s13534-014-0131-5.

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9

KOH, J., W. ZHOU, and T. KIM. "Wideband DOA Estimation Using a Frequency-Domain Frequency-Invariant Beamformer and a Matrix Pencil Method." IEICE Transactions on Communications E91-B, no. 4 (April 1, 2008): 1235–38. http://dx.doi.org/10.1093/ietcom/e91-b.4.1235.

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10

Zhao, Y., W. Liu, and R. Langley. "Application of the least squares approach to fixed beamformer design with frequency-invariant constraints." IET Signal Processing 5, no. 3 (2011): 281. http://dx.doi.org/10.1049/iet-spr.2009.0300.

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11

Liu, Wei. "Design and implementation of a rectangular frequency invariant beamformer with a full azimuth angle coverage." Journal of the Franklin Institute 348, no. 9 (November 2011): 2556–69. http://dx.doi.org/10.1016/j.jfranklin.2011.07.016.

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12

Trucco, A., M. Crocco, and S. Repetto. "A Stochastic Approach to the Synthesis of a Robust Frequency-Invariant Filter-and-Sum Beamformer." IEEE Transactions on Instrumentation and Measurement 55, no. 4 (August 2006): 1407–15. http://dx.doi.org/10.1109/tim.2006.876403.

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13

Fang, Erzheng, Chenyang Gui, Desen Yang, and Zhongrui Zhu. "Frequency Invariant Beamforming for a Small-Sized Bi-Cone Acoustic Vector–Sensor Array." Sensors 20, no. 3 (January 24, 2020): 661. http://dx.doi.org/10.3390/s20030661.

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In this work, we design a small-sized bi-cone acoustic vector-sensor array (BCAVSA) and propose a frequency invariant beamforming method for the BCAVSA, inspired by the Ormia ochracea’s coupling ears and harmonic nesting. First, we design a BCAVSA using several sets of cylindrical acoustic vector-sensor arrays (AVSAs), which are used as a guide to construct the constant beamwidth beamformer. Due to the mechanical coupling system of the Ormia ochracea’s two ears, the phase and amplitude differences of acoustic signals at the bilateral tympanal membranes are magnified. To obtain a virtual BCAVSA with larger interelement distances, we then extend the coupling magnified system into the BCAVSA by deriving the expression of the coupling magnified matrix for the BCAVSA and providing the selecting method of coupled parameters for fitting the underwater signal frequency. Finally, the frequency invariant beamforming method is developed to acquire the constant beamwidth pattern in the three-dimensional plane by deriving several sets of the frequency weighted coefficients for the different cylindrical AVSAs. Simulation results show that this method achieves a narrower mainlobe width compared to the original BCAVSA. This method has lower sidelobes and a narrower mainlobe width compared to the coupling magnified bi-cone pressure sensor array.

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14

Rouseff, Daniel, Scott Schecklman, and Jorge Quijano. "Lisa Zurk’s contributions to striation-based signal processing for active sonar." Journal of the Acoustical Society of America 152, no. 4 (October 2022): A242. http://dx.doi.org/10.1121/10.0016145.

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Strong multipath propagation adds considerable complication to acoustic signal processing in the ocean. When mapped in range-frequency space, the acoustic field exhibits striations, alternating bands of high and low intensity due to constructive and destructive interference between the paths. Nearly forty years ago, Russian scientists showed how this striation pattern could be described by a single scalar parameter, the so-called waveguide invariant that subsequently became a staple of their passive sonar signal processing methods. Lisa Zurk’s contribution was to show how a striation-based approach could be adapted to active sonar processing. Together with her students, she did tank experiments and analysis for monostatic and bistatic configurations. For a horizontal array, she developed a beamformer featuring a linear frequency shift across the array designed to align with high-intensity striations. The result was improved performance in noisy environments. She showed how the waveguide invariant can improve tracking accuracy by providing a constraint on possible tracks. She and her students demonstrated the improved tracking with continuous active sonar data. Lisa Zurk’s innovative work on these topics continues to inspire present day research.

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15

Wu, Yue Ivan, Kainam Thomas Wong, Xin Yuan, Siu-kit Lau, and Shiu-keung Tang. "A directionally tunable but frequency-invariant beamformer on an acoustic velocity-sensor triad to enhance speech perception." Journal of the Acoustical Society of America 131, no. 5 (May 2012): 3891–902. http://dx.doi.org/10.1121/1.3701991.

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16

Yu, Hong Qi, Xin Xu, Zhao Lin Sun, Hai Jun Liu, and Jie Tao Diao. "Design for Frequency Invariant Beamformers Based on Cubic Spline Function." Applied Mechanics and Materials 198-199 (September 2012): 332–37. http://dx.doi.org/10.4028/www.scientific.net/amm.198-199.332.

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A new method of implementing frequency invariant beamformers based on cubic spline function is presented. Based on the frequency, the sensor distance of the virtual array is generated. The virtual array output is formed from the sensor array by cubic spline function interpolation. The beamformers of every frequency bins in the bandwidth of the signal is similar to that of the referenced frequency. The method is simple and easy to implement. Simulation results demonstrate the effectiveness of the method.

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17

Ward, D. B., R. A. Kennedy, and R. C. Williamson. "FIR filter design for frequency invariant beamformers." IEEE Signal Processing Letters 3, no. 3 (March 1996): 69–71. http://dx.doi.org/10.1109/97.481158.

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18

Liu, Wei, and Stephan Weiss. "Design of Frequency Invariant Beamformers for Broadband Arrays." IEEE Transactions on Signal Processing 56, no. 2 (February 2008): 855–60. http://dx.doi.org/10.1109/tsp.2007.907872.

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19

Wang, Yong, and Yixin Yang. "A Flexible Method for Designing Frequency-Invariant Beamformers With Circular Sensor Arrays." IEEE Access 6 (2018): 57073–84. http://dx.doi.org/10.1109/access.2018.2872599.

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20

Tuan Do-Hong, F. Demmel, and P. Russer. "Wideband direction-of-arrival estimation using frequency-domain frequency-invariant beamformers: an analysis of performance." IEEE Microwave and Wireless Components Letters 14, no. 8 (August 2004): 383–85. http://dx.doi.org/10.1109/lmwc.2004.832633.

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21

Liu, Wei, and Stephan Weiss. "Off-broadside main beam design and subband implementation for a class of frequency invariant beamformers." Signal Processing 89, no. 5 (May 2009): 913–20. http://dx.doi.org/10.1016/j.sigpro.2008.11.010.

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22

Zhang, Xin, Wee Ser, Zhang Zhang, and AnoopKumar Krishna. "Selective Frequency Invariant Uniform Circular Broadband Beamformer." EURASIP Journal on Advances in Signal Processing 2010, no. 1 (January 19, 2010). http://dx.doi.org/10.1155/2010/678306.

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23

Zhang, Junjia, Pengcheng Gong, Yuntao Wu, Lirong Li, and Liang Yu. "Frequency-Invariant Beamformer Design via ADPM Approach." Signal Processing, October 2022, 108814. http://dx.doi.org/10.1016/j.sigpro.2022.108814.

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24

"Design of an Efficient Wideband Beamformer using OPSO." International Journal of Innovative Technology and Exploring Engineering 8, no. 11 (September 10, 2019): 2144–52. http://dx.doi.org/10.35940/ijitee.k2020.0981119.

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Wideband beamforming is a technique which is used to produce frequency invariant beampatterns over a wide signal bandwidth. In this paper, orthogonal particle swarm optimization (OPSO) based wideband beamformer is designed to achieve wideband beamforming. Simulations are carried out for two different scenarios to illustrate the capability of the algorithm for wideband beamforming. The beampatterns obtained from three different methods that are standard Frost algorithm, particle swarm optimization (PSO) and OPSO are compared by various parameters such as level of interference, deviation in interference angle and peak side lobe level. It is shown that by using OPSO, SLL (Sidelobe Level), null depth as well as angle deviation in nulls direction can be reduced as compared to PSO and Frost algorithms

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25

Zhang, Junjia, Pengcheng Gong, Yuntao Wu, Liang Yu, and Lirong Li. "Design of Frequency Invariant Beamformers Via Adpm Approach." SSRN Electronic Journal, 2022. http://dx.doi.org/10.2139/ssrn.4139406.

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26

Wang, Jinfu, Feiran Yang, and Jun Yang. "Insights Into the MMSE-Based Frequency-Invariant Beamformers for Uniform Circular Arrays." IEEE Signal Processing Letters, 2022, 1–5. http://dx.doi.org/10.1109/lsp.2022.3224687.

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27

Liu, Chang Peng, Shi Hong Zhou, Juan Hui, Yun Ren, and Yu Bo Qi. "Performance Metrics for Striation-based Beamforming and Application Requirements with the Horizontal Line Array in Shallow Water." Journal of Theoretical and Computational Acoustics, December 5, 2020, 2050028. http://dx.doi.org/10.1142/s2591728520500280.

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Due to the dispersion of normal modes in shallow water, there exist regular striations on the interference spectrogram in space-frequency domain. Based on the range-frequency domain striations, waveguide invariant can be estimated with the prior knowledge of source range. Utilizing striations along the array, Rouseff and Zurk [J. Acoust. Soc. Amer. 130 (2011) EL76–EL81] proposed the striation-based beamforming (SBF), which shows a theoretical possibility to estimate waveguide invariant that is independent of source range. To make this beamforming technique more practical, its application requirements and performance limitation should be defined. These two issues are researched with the phase and amplitude relationships deduced by the frequency-shift compensation theory. It shows the source whose spectrum varies slowly and received signals that contain the complete information of transmission time are keys for applying SBF to real work. The azimuth limitation can lead to the degradation of array gain and distortion of interference structure. Matching parameters of waveguide invariant and source range, respectively, two modified striation-based beamformers are developed to eliminate the azimuth limitation. Simulation and experimental results are presented.

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