Experimental Evaluation of Non-Coherent MIMO Grassmannian Signaling Schemes
| Title | Experimental Evaluation of Non-Coherent MIMO Grassmannian Signaling Schemes |
| Publication Type | Conference Paper |
| Year of Publication | 2017 |
| Authors | Fanjul, J., I. Santamaría, J. Ibáñez, and C. Loucera |
| Conference Name | 16th International Conference on Ad Hoc Networks and Wireless (AdHoc-Now 2017) |
| Month Published | September |
| Conference Location | Messina, Italy |
| Keywords | Grassmannian signaling, MIMO testbed, Non-coherent communications, OFDM, Over-the-air (OTA) experiments |
| Abstract | In this paper, we present an over-the-air (OTA) performance analysis of Grassmannian signaling strategies in an orthogonal frequencydivision multiplexing (OFDM) single-user multiple-input multiple-output (SU-MIMO) scenario. Speci cally, we compare the Grassmannian signaling technique to the di erential Alamouti scheme and a novel space-time non-coherent scheme recently proposed in the context of 5G. As a performance benchmark we include in the comparison the coherent Alamouti scheme. We study the practical impairments associated to frequency synchronization mismatches (frequency o sets), as well as the e ects of time-varying channels for di erent spectral eciencies. The experimental results show that non-coherent techniques are more robust to the aforementioned impairments than the coherent Alamouti approach, while Grassmannian methods are close to the di erential Alamouti scheme with 2 transmit antennas. |
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