Wireless Cable Method for High-order MIMO Terminals Based on Particle Swarm Optimization Algorithm

Wei Fan, Fengchun Zhang, Pekka Kyosti, Lassi Hentilä, Gert F. Pedersen

Research output: Contribution to journalJournal articleResearchpeer-review

4 Citations (Scopus)
260 Downloads (Pure)


Conducted cable setups have been dominantly utilized in the industry for performance testing of multiple-input-multiple-output (MIMO) terminals. The wireless cable method, which can achieve cable connection functionality without actual radio frequency cable connections, is a promising alternative. To date, the wireless method has been only discussed for 2× 2 MIMO terminals in the literature. However, the algorithm is not directly applicable for high-order MIMO terminals, due to the high computation complexity to determine the calibration matrix and high system cost to implement the calibration matrix. In this paper, an efficient particle swarm optimization (PSO) algorithm is proposed to determine the calibration matrix for high-order MIMO systems. Furthermore, a novel implementation of the calibration matrix in the radio channel emulator is proposed, which can significantly reduce the system cost. To validate the proposed algorithm, two MIMO mockups, each equipped with four antennas, were measured in an anechoic chamber. The measured results demonstrated the effectiveness of the PSO algorithm to establish wireless cable connections for 4× 4 MIMO terminals.

Original languageEnglish
Article number8416718
JournalI E E E Transactions on Antennas and Propagation
Issue number10
Pages (from-to)5536-5545
Number of pages10
Publication statusPublished - 1 Oct 2018


  • MIMO performance testing
  • Multiple-input-multiple-output (MIMO) over-the-air (OTA) testing
  • particle swarm optimization (PSO) algorithm
  • radio channel propagation
  • wireless cable method

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