Skip to Main content Skip to Navigation
Conference papers

Experimental evaluation of relative calibration in a MISO-TDD system

Abstract : We study the transmit time reversal beamforming in a 8x1 MISO communication system at 2.68GHz. We consider the downlink time reversal transmission where a BS communicates with one user. A prototype composed by 8 antennas and designed by Orange labs acts as the BS while the user has a single antenna. The reciprocity property is destroyed by the non-symmetric characteristics of the RF electronic circuitry. We use relative calibration which is based exclusively on signal processing techniques to solve this issue. Utilizing a controlled test setup based on OpenAirInterface, the ExpressMIMO2 SDR boards, as well as a servo controlled rail, we show the feasibility of a relative calibration method through beamforming SNR measurements. We also evaluate the performance of an antenna selection scheme at the transmit side as a low-cost low-complexity alternative to capture many of the advantages of multi-antenna systems. The measurements show that the relative calibration method is performing almost optimal and that the complexity can be significantly reduced by using antenna selection.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01584780
Contributor : Sophie Gaffé-Clément <>
Submitted on : Saturday, September 9, 2017 - 5:03:46 PM
Last modification on : Thursday, March 5, 2020 - 12:20:37 PM

Identifiers

Collections

Citation

T. Magounaki, F. Kaltenberger, X. Jiang, C. Buey, P. Ratajczak, et al.. Experimental evaluation of relative calibration in a MISO-TDD system. 2017 European Conference on Networks and Communications (EuCNC), Jun 2017, Oulu, Finland. pp. 1-5, ⟨10.1109/EuCNC.2017.7980759⟩. ⟨hal-01584780⟩

Share

Metrics

Record views

236