Distributed Phased Arrays

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Significant advancements in wireless systems can be achieved with distributed radio frequency systems. We are researching novel technologies to enable distributed radio frequency operations on mobile platforms for remote sensing and communications.

Numerous applications exist for distributed arrays, one being the use of low-cost cubesat arrays to perform the missions of much larger, more expensive satellites.

Publications:

S. R. Mghabghab, A. Schlegel, and J. A. Nanzer, “Adaptive Distributed Transceiver Synchronization Over a 90 Meter Microwave Wireless Link,” IEEE Transactions on Antennas and Propagation, accepted

S. M. Ellison, S. R. Mghabghab, and J. A. Nanzer, “Multi-Node Open-Loop Distributed Beamforming Based on Scalable, High-Accuracy Ranging,” IEEE Sensors Journal, accepted

S. R. Mghabghab, S. M. Ellison, and J. A. Nanzer, “Distributed Beamforming Using Wireless Phase and Frequency Synchronization,” IEEE Microwave and Wireless Components Letters, accepted

S. R. Mghabghab and J. A. Nanzer, “Microwave Ranging via Least-Squares Estimation of Spectrally Sparse Signals in Software-Defined Radio,” IEEE Microwave and Wireless Components Letters, accepted

J. A. Nanzer, S. R. Mghabghab, S. M. Ellison, and A. Schlegel, “Distributed Phased Arrays: Challenges and Recent Advances,” IEEE Transactions on Microwave Theory and Techniques, vol. 69, no. 11, 2021

H. Ouassal, M. Yan, and J. A. Nanzer, “Decentralized Frequency Alignment for Collaborative Beamforming in Distributed Phased Arrays,” IEEE Transactions on Wireless Communications, vol. 20, no. 10, 2021

S. R. Mghabghab and J. A. Nanzer, “Impact of VCO and PLL Phase Noise on Distributed Beamforming Arrays with Periodic Synchronization,” IEEE Access, vol. 9, 2021

S. R. Mghabghab and J. A. Nanzer, “Open-Loop Distributed Beamforming using Wireless Frequency Synchronization,” IEEE Transactions on Microwave Theory and Techniques, vol. 69, no. 1, 2021

S. R. Mghabghab and J. A. Nanzer, “High Accuracy Adaptive Microwave Ranging Using SNR-Based Perception for Coherent Distributed Antenna Arrays,” IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 67, no. 12, 2020

S. R. Mghabghab and J. A. Nanzer, “Adaptive Internode Ranging for Coherent Distributed Antenna Arrays,” IEEE Transactions on Aerospace and Electronic Systems, vol. 56, no. 6, 2020

S. M. Ellison and J. A. Nanzer, “High-Accuracy Multi-Node Ranging For Coherent Distributed Antenna Arrays,” IEEE Transactions on Aerospace and Electronic Systems, vol. 56, no. 5, 2020

H. Ouassal, T. Rocco, M. Yan, and J. A. Nanzer, “Decentralized Frequency Synchronization in Distributed Antenna Arrays with Quantized Frequency States and Directed Communications,” IEEE Transactions on Antennas and Propagation, vol. 68, no. 7, 2020

A. Schlegel, S. M. Ellison, and J. A. Nanzer, “A Microwave Sensor with Submillimeter Range Accuracy Using Spectrally-Sparse Signals,” IEEE Microwave and Wireless Components Letters, vol. 30, no. 1, 2020

S. M. Ellison, S. Mghabghab, J. J. Doroshewitz, and J. A. Nanzer, “Combined Wireless Ranging and Frequency Transfer for Inter-Node Coordination in Open-Loop Coherent Distributed Antenna Arrays,” IEEE Transactions on Microwave Theory and Techniques, vol. 68, no. 1, 2020

S. M. Ellison, S. R. Mghabghab, and J. A. Nanzer, “Scalable High-Accuracy Localization and Wireless Frequency Synchronization for Open-Loop Distributed Phased Arrays,” IEEE 63rd International Midwest Symposium on Circuits & Systems, 2020, Invited paper

S. Mghabghab and J. A. Nanzer, “A Self-Mixing Receiver for Wireless Frequency Synchronization in Coherent Distributed Arrays,” IEEE International Microwave Symposium, 2020

S. Mghabghab, A. Schlegel, R. Gress, and J. A. Nanzer, “Long-Range Wireless Frequency Synchronization for Distributed Phased Arrays,” IEEE International Symposium on Antennas and Propagation, 2020

P. Chatterjee and J. A. Nanzer, “SDR-Based Wireless Pulse Alignment for Coherent Distributed Beamforming,” IEEE International Symposium on Antennas and Propagation, 2020

S. Ellison and J. A. Nanzer, “A Scalable Dual LFM Waveform for Unambiguous Localization in Distributed Antenna Arrays,” IEEE International Symposium on Antennas and Propagation, 2020

S. Ellison and J. A. Nanzer, “High-Accuracy Localization in Joint Radar and Communications Systems Using Multi-Tone Waveform Modulation,” IEEE International Symposium on Antennas and Propagation, 2020

A. Schlegel, S. Mghabghab, and J. A. Nanzer, “Delay Calibration in Software-Defined Radios for High-Accuracy Microwave Ranging,” IEEE International Symposium on Antennas and Propagation, 2020

P. Chatterjee, M. Yan, and J. A. Nanzer, “Frequency Consensus for Distributed Antenna Arrays With Half-Duplex Wireless Coordination,” IEEE International Symposium on Antennas and Propagation, 2020

S. Mghabghab and J. A. Nanzer, “Ranging Requirements for Open-Loop Coherent Distributed Arrays With Wireless Frequency Synchronization,” USNC-URSI Radio Science Meeting URSI-C, 2020

A. Schlegel and J. A. Nanzer, “High-Accuracy Unambiguous Localization Using Sparse Code-Modulated Signals,” USNC-URSI Radio Science Meeting URSI-C, 2020

S. Mghabghab and J. A. Nanzer, “Effects of Spectral Interference on High-Accuracy Ranging in Coherent Distributed Arrays,” USNC-URSI Radio Science Meeting URSI-B, 2019

S. Mghabghab, H. Ouassal, and J. A. Nanzer, “Wireless Frequency Synchronization for Coherent Distributed Antenna Arrays,” IEEE International Symposium on Antennas and Propagation, 2019

L. Gong, S. Vakalis, and J. A. Nanzer, “Millimeter-Wave Localization of Multiple Targets Using TDOA and Wideband Frequency Modulation,” IEEE International Symposium on Antennas and Propagation, 2019

A. Schlegel, S. M. Ellison, and J. A. Nanzer, “Implementing Spectrally-Sparse, Wideband Waveforms in Multi-Channel Software-Defined Radios for High-Accuracy Ranging,” USNC-URSI Radio Science Meeting URSI-C, 2019

A. Schlegel, S. Mghabghab, and J. A. Nanzer, “Crosstalk-Based Calibration for High Accuracy Ranging Using Software-Defined Radios,” USNC-URSI Radio Science Meeting URSI-C, 2019

S. Vakalis, E. Klinefelter, and J. A. Nanzer, “Angle Estimation Using Wideband Frequency Modulation and an Active Distributed Array,” IEEE Microwave and Wireless Components Letters, vol. 28, no. 11, 2018

S. M. Ellison and J. A. Nanzer, “Two-Step Optimization of Linear Distributed Arrays,” IEEE International Symposium on Antennas and Propagation, 2018

P. Chatterjee and J. A. Nanzer, “Effects of Time Alignment Errors in Coherent Distributed Radar,” IEEE Radar Conference, 2018

P. Chatterjee and J. A. Nanzer, “Using Platform Motion for Improved Spatial Filtering in Distributed Antenna Arrays,” IEEE Radio and Wireless Symposium (RWS), 2018

P. Chatterjee and J. A. Nanzer, “Modified Quadrature Correlation Delay Estimation for Time Alignment in Distributed Arrays,” USNC-URSI Radio Science Meeting URSI-C, 2018

J. A. Nanzer, R. L. Schmid, T. M. Comberiate, and J. E. Hodkin, “Open-Loop Coherent Distributed Arrays,” Invited paper, IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 5, 2017.

R. L. Schmid, T. M. Comberiate, J. E. Hodkin, and J. A. Nanzer, “A Distributed RF Transmitter Using One-Way Wireless Clock Transfer,” IEEE Microwave and Wireless Components Letters, vol. 27, no.2, 2017.

T. M. Comberiate, R. L. Schmid, J. E. Hodkin, and J. A. Nanzer, “A Bandpass Sampling Receiver for Wide-Bandwidth, Spectrally-Sparse Waveforms for High-Accuracy Range Measurements,” IEEE Microwave and Wireless Components Letters, vol. 27, no. 1, pp. 88-90, 2017.

S. M. Ellison and J. A. Nanzer, “Comparison of Crossover Recombination Operators in GA-Optimized Sparse Linear Array Design,” IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 2017

P. Chatterjee and J. A. Nanzer, “A Study of Coherent Gain Degradation due to Node Vibrations in Open Loop Coherent Distributed Arrays,” IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 2017

J. J. Doroshewitz, C. Oakley, and J. A. Nanzer, “An X-Band Multiband Patch Antenna for Spectrally Sparse Waveforms,” to be presented at IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 2017

S. M. Ellison and J. A. Nanzer, “Optimized 2-Dimensional Platform Placement for Sidelobe Mitigation in Coherent Distributed Arrays,” IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 2017

R. L. Schmid, S. M. Ellison, T. M Comberiate, J. E. Hodkin, and J. A. Nanzer, “Microwave Wireless Coordination Technologies for Coherent Distributed Maritime Radar,” Invited paper, IEEE International Microwave Symposium (IMS), June 4-9, 2017

R. L. Schmid, J. E. Hodkin, T. M. Comberiate, and J. A. Nanzer. “One-way wireless clock transfer for coherent distributed arrays,” IEEE Radio and Wireless Symposium (RWS), Jan 2017

J. A. Nanzer, M. D. Sharp, and D. R. Brown III, “Bandpass Signal Design for Passive Time Delay Estimation,” 50th Asilomar Conference on Signals, Systems and Computers, Nov. 6-9, 2016.

T. M. Comberiate, R. L. Schmid, J. E. Hodkin, and J. A. Nanzer, “Platform Placement for Sidelobe Mitigation in Mobile Sparse Arrays,” IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, June 26 – July 1, 2016.

T. M. Comberiate, R. L. Schmid, J. E. Hodkin, and J. A. Nanzer, “Demonstration of a Coherent RF Repeater for Distributed Communications,” IEEE Wireless Communications Letters, vol. 5, no. 2, 2016.

R. L. Schmid, J. E. Hodkin, T. M. Comberiate, M. D. Sharp, and J. A. Nanzer, “Angle Resolution Using Interferometric Spatial Frequency Modulation,” IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, June 26 – July 1, 2016.

T. M. Comberiate, R. L. Schmid, J. E. Hodkin, and J. A. Nanzer, “Platform Placement for Sidelobe Mitigation in Mobile Sparse Arrays,” IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, June 26 – July 1, 2016.

T. M. Comberiate, R. L. Schmid, J. E. Hodkin, and J. A. Nanzer, ”Distributed Transmit Beamforming Using High-Accuracy Microwave Wireless Positioning,” SPIE Defense + Security, April 17-26 2016.

J. A. Nanzer, “Spatial Filtering of Grating Lobes in Mobile Sparse Arrays,” IEEE Radio and Wireless Symposium, January 24-27, 2016.

K .S. Zilevu, J. E. Hodkin, M. D. Sharp, T. M. Comberiate, and J. A. Nanzer, “Waveforms and Signal Processing for High-Accuracy Microwave Metrology,” IEEE AP-S International Symposium on Antennas and Propagation, July 19-25, 2015.

T. M. Comberiate, K. S. Zilevu, J. E. Hodkin, and J. A. Nanzer, “A Coherent RF Repeater for Distributed Communications,” CNC/USNC/URSI National Radio Science Meeting, July 19-25, 2015.

J. E. Hodkin, K. S. Zilevu, M. D. Sharp, T. M. Comberiate, S. M. Hendrickson, M. J. Fitch and J. A. Nanzer, “Microwave and Millimeter-Wave Ranging for Coherent Distributed RF Systems,” IEEE Aerospace Conference, March 1-8, 2015.