Limit of Operating Frequencies in Mobile Communications Based on Closed-Loop MIMO 


Vol. 43,  No. 10, pp. 1571-1575, Oct.  2018
10.7840/kics.2018.43.10.1571


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  Abstract

We analyze the limit of operating frequency in mobile communications using closed-loop multiple-input multiple-output (MIMO). In mobile communications, the wireless channel should be the same during the time when the communications signal travels back and forth between a base station and a cell phone. Using the condition, we can mathematically derive the limit of operating frequency in mobile communications. According to our results, the frequency limit is dependent on the speed of the mobile device, the delay time in the base station, and the cell radius. Our results show that it is difficult to apply closed-loop MIMO at a frequency band over 39 GHz to support a mobile device with a moving speed of 120 km/h.

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  Cite this article

[IEEE Style]

S. Kim, "Limit of Operating Frequencies in Mobile Communications Based on Closed-Loop MIMO," The Journal of Korean Institute of Communications and Information Sciences, vol. 43, no. 10, pp. 1571-1575, 2018. DOI: 10.7840/kics.2018.43.10.1571.

[ACM Style]

Sung-Man Kim. 2018. Limit of Operating Frequencies in Mobile Communications Based on Closed-Loop MIMO. The Journal of Korean Institute of Communications and Information Sciences, 43, 10, (2018), 1571-1575. DOI: 10.7840/kics.2018.43.10.1571.

[KICS Style]

Sung-Man Kim, "Limit of Operating Frequencies in Mobile Communications Based on Closed-Loop MIMO," The Journal of Korean Institute of Communications and Information Sciences, vol. 43, no. 10, pp. 1571-1575, 10. 2018. (https://doi.org/10.7840/kics.2018.43.10.1571)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880