NDLI: Optimum designs of high mobility wireless systems with channel estimation errors

Content Provider	IET Digital Library
Author	Sun, Ning Wu, Jingxian Fan, Pingzhi
Abstract	This research studies the optimum system designs of high mobility wireless communication systems with imperfect channel state information. In high mobility systems, the channel estimation error is usually inevitable and might have significant impacts on system performance. The impacts of channel estimation errors on system performance are quantified through the development of a spectral efficiency lower bound. With the help of the asymptotic analysis of the channel estimation mean squared error, the spectral efficiency lower bound is expressed as explicit functions of a number of system parameters, such as the maximum Doppler frequency, the percentage of pilots in the transmitted symbols, and the ratio of energy allocated between data symbols and pilot symbols. The optimum pilot percentage and energy allocation factor that jointly maximise the spectral efficiency lower bound are identified through analytical studies. It is discovered that, in term of maximising spectral efficiency, the optimum performance can be achieved by optimising the energy allocation factor when the pilots sample the fast time-varying fading at its Nyquist rate.
Starting Page	1677
Ending Page	1682
Page Count	6
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 13, Sep (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.0952
Journal	IET Communications
Publisher Date	2015-08-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymptotic Analysis Channel Allocation Channel Estimation Channel Estimation Mean Squared Error Communication Channel Equalisation And Identification Energy Allocation Factor Optimisation Explicit Function Fading Channel High Mobility Wireless Communication System Imperfect Channel State Information Interpolation And Function Approximation Least Mean Squares Method Mobile Radio Mobile Radio System Mobility Management Network Management Numerical Analysis Nyquist Rate Optimisation Optimisation Technique Optimum System Design Spectral Analysis Spectral Efficiency Lower Bound Spectral Efficiency Maximisation Time-varying Channel Time-varying Fading
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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