In this paper, we investigate a radio frequency (RF) lens-embedded massive multiple-input multiple-output (MIMO) system and evaluate the system performance of limited feedback by utilizing a technique for generating a suitable codebook for the system. We fabricate an RF lens that operates on a 77-GHz (millimeter-wave) band. Experimental results show a proper value of amplitude gain and an appropriate focusing property. In addition, using a simple numerical technique - beam propagation method - we estimate the power profile of the RF lens and verify its accordance with experimental results. We also design a codebook - multivariance codebook quantization - for limited feedback by considering the characteristics of the RF lens antenna for massive MIMO systems. Numerical results confirm that the proposed system shows significant performance enhancement over a conventional massive MIMO system without an RF lens.
|Number of pages||16|
|Journal||IEEE Transactions on Microwave Theory and Techniques|
|Publication status||Published - 2016 Jul|
Bibliographical noteFunding Information:
This work was supported in part by the Ministry of Science, ICT and Future Planning (MSIP), South Korea, through the IT Consilience Creative Program supervised by the Institute for Information and Communications Technology Promotion (IITP), under Grant IITP-2015-R0346-15-1008, and in part by the MSIP/IITP through the ICT Research and Development Program under Grant B0126-16-1012.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Electrical and Electronic Engineering