This letter analyzes a spectral efficiency (SE) performance reflecting heterogeneous channel estimation (CE) capabilities across user equipment (UE) in ultra-dense small cell networks. Specifically, we derive asymptotic and approximated SE performances considering different kinds of CE capabilities. The analysis and simulation results lead us to some new intuitions as follows. First, the heterogeneity of CE capabilities across UEs has a great effect on SE performance in ultra-dense networks. Second, as the cell density increases, SE performance is asymptotically converged to its limit point when heterogeneous CE capabilities are considered, whereas the SE logarithmically increases in the perfect CE case.
Bibliographical noteFunding Information:
Manuscript received February 16, 2017; revised March 28, 2017; accepted April 22, 2017. Date of publication April 26, 2017; date of current version August 10, 2017. This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2015R1A2A1A01006162), and in part by Institute for Information & communications Technology Promotion (IITP) grant funded by the Korea government (MSIP) (No.B0717-16-0024). The associate editor coordinating the review of this letter and approving it for publication was X. Chu. (Corresponding Author: Daesik Hong.) The authors are with ITL, Yonsei University, Seoul, South Korea (e-mail: firstname.lastname@example.org; email@example.com; firstname.lastname@example.org). Digital Object Identifier 10.1109/LCOMM.2017.2699661 1For notational simplicity, let us denote “small cell” and “small BS” as “cell” and “BS”, respectively.
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All Science Journal Classification (ASJC) codes
- Modelling and Simulation
- Computer Science Applications
- Electrical and Electronic Engineering