Thiran Filters for Wideband DSP-Based Multi-Beam True Time Delay RF Sensing Applications

The ability to sense propagating electromagnetic plane waves based on their directions of arrival (DOAs) is fundamental to a range of radio frequency (RF) sensing, communications, and imaging applications. This paper introduces an algorithm for the wideband true time delay digital delay Vandermonde...

Celý popis

Uloženo v:
Podrobná bibliografie
Vydáno v:Sensors (Basel, Switzerland) Ročník 24; číslo 2; s. 576
Hlavní autoři: Perera, Sirani M., Rathnasekara, Gayani, Madanayake, Arjuna
Médium: Journal Article
Jazyk:angličtina
Vydáno: Switzerland MDPI AG 01.01.2024
MDPI
Témata:
Algorithms
Antennas
Application-specific integrated circuits
array processing
complexity and performance of algorithm
Custom integrated circuits
Design
Digital integrated circuits
Electromagnetism
Multiplication & division
Semiconductor industry
signal processing and analysis
structured matrices
Thiran fractional delays
TTD wideband multi-beam beamforming
United States
structured matrices
TTD wideband multi-beam beamforming
array processing
complexity and performance of algorithm
Thiran fractional delays
signal processing and analysis
wireless communication
ISSN:1424-8220, 1424-8220
On-line přístup:Získat plný text
Tagy: Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
Popis
Shrnutí:The ability to sense propagating electromagnetic plane waves based on their directions of arrival (DOAs) is fundamental to a range of radio frequency (RF) sensing, communications, and imaging applications. This paper introduces an algorithm for the wideband true time delay digital delay Vandermonde matrix (DVM), utilizing Thiran fractional delays that are useful for realizing RF sensors having multiple look DOA support. The digital DVM algorithm leverages sparse matrix factorization to yield multiple simultaneous RF beams for low-complexity sensing applications. Consequently, the proposed algorithm offers a reduction in circuit complexity for multi-beam digital wideband beamforming systems employing Thiran fractional delays. Unlike finite impulse response filter-based approaches which are wideband but of a high filter order, the Thiran filters trade usable bandwidth in favor of low-complexity circuits. The phase and group delay responses of Thiran filters with delays of a fractional sampling period will be demonstrated. Thiran filters show favorable results for sample delay blocks with a temporal oversampling factor of three. Thiran fractional delays of orders three and four are mapped to Xilinx FPGA RF-SoC technologies for evaluation. The preliminary results of the APF-based Thiran fractional delays on FPGA can potentially be used to realize DVM factorizations using application-specific integrated circuit (ASIC) technology.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:1424-8220
1424-8220
DOI:10.3390/s24020576