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Communication Dans Un Congrès Année : 2023

Frequency Diverse Array Spatial Data Focusing: Free Space and Multipath Experimental Validation

Résumé

This paper presents the first-ever experimental validation of both spatial data focusing (SDF) and time-invariant frequency diverse array (FDA) range-angle-based focusing, in both free space and multipath environments. In particular, a hybrid FDA-based SDF (FDA-SDF) approach is considered for spatially confined broadcasting, i.e. geocasting. First, the base FDA-SDF free space system model is reviewed. Next, a novel OFDM-based FDA-SDF system model is introduced to ensure robust operation in multipath channels. The schemes are validated, respectively, in an anechoic chamber and outdoor measurement setup using software defined radios. Results confirm FDA-SDF's anticipated supreme spatial precision: a 0.9 m × 4.0°range-azimuth geocast delivery zone is generated by a 4-antenna array in free space. Additionally, they illustrate that OFDM-based FDA-SDF provides all necessary performance improvements for practical operation in outdoor multipath environments. Most notably, FDA-SDF is shown to overcome the time-variance flaw of conventional FDA.
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Dates et versions

hal-04347039 , version 1 (19-12-2023)

Identifiants

  • HAL Id : hal-04347039 , version 1

Citer

Guylian Molineaux, François Horlin, Muriel Darces, Philippe de Doncker, Julien Sarrazin. Frequency Diverse Array Spatial Data Focusing: Free Space and Multipath Experimental Validation. 2023 IEEE Global Communications Conf. (GLOBECOM 2023), Dec 2023, Kuala Lumpur, Malaysia. ⟨hal-04347039⟩
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