Deisgn of look-up table based architecture for wideband beamforming
Abstract
Wideband beamforming with a real-time array testbed will be studied in this paper. The algorithm and implementation architecture on wideband beamforming will be the main focus. The contribution of this paper can be summarized in the following three aspects. First, the channel imbalances among different RF chains will be taken into account. The equivalent complex baseband impulse responses of RF chains are measured from the AFRL TELA testbed. The second contribution is that the novel architecture of wideband beamforming is proposed. Look-up table (LUT) based architecture is exploited to replace the pre-steering delay component to avoid fractional delay-one implementation bottleneck. In addition, the general optimization issue for wideband beamforming is formulated as semi-definite programing (SDP), which can be efficiently solved by the convex optimization tool, e.g. CVX.
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The TTD beamformer is the optimal beamformer when the signals of interest are contaminated by wide sense stationary AWGN.
“The TTD beamformer is the optimal beamformer when the signals of interest are contaminated by wide sense stationary AWGN [2,3,4,5];”
From Thiran Filters for Wideband DSP-Based Multi-Beam True Time Delay RF Sensing Applications (2024) · cites this paper as [5]
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Thiran Filters for Wideband DSP-Based Multi-Beam True Time Delay RF Sensing Applications
Perera, S. M., Rathnasekara, G., & Madanayake, A. (2024) · Sensors · doi:10.3390/s24020576 · Cited by 5 · see citing works
“In cases where a large number of wideband beams are required, a dedicated TTD beam must be created through its own TTD beamsteering network [5].”
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Self-citation
- Authors
- Hu, Z., Guo, N., Qiu, R., Bonior, J., Liou, L., Lin, D., Longbrake, M., Buxa, P., Dalrymple, T., Hong, S., Hary, S., & Tsui, J.
- Affiliations
- Tennessee Technological University (US)
- United States Air Force Research Laboratory (US)
- Venue
- 2010 International Waveform Diversity and Design Conference
- Publisher
- IEEE
- Published
- 2010-08
- Volume
- 37
- Pages
- 000001-000005
- OpenAlex
- W2094595671
- Cited by
- 5
- References
- 21
- Citations by year
- 2024: 1 · 2012: 2
- FWCI
- 1.47
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- International Waveform Diversity and Design Conference (publishedVersion)
- Funders
- Office of Naval Research
- Division of Electrical, Communications and Cyber Systems
- Army Research Office
- Topics
- Physical Sciences › Computer Science › Signal Processing › Direction-of-Arrival Estimation Techniques
- Physical Sciences › Engineering › Aerospace Engineering › Radar Systems and Signal Processing
- Physical Sciences › Computer Science › Signal Processing › Digital Filter Design and Implementation
- Keywords
- wideband beamforming, phased array antenna, fractional delay, semidefinite programming, beamforming optimization
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