Inter-cell Interference Management under Imperfect Channel State Information at Transmitter
Date Issued
2015
Date
2015
Author(s)
Jiang, Li-An
Abstract
For future wireless communication, more and more small cells will be established, there are more likely to interfere each other. Thus inter-cell interference management will be an important issue. From the point of view of information theory, the simplest interfering links can be modeled as a two-user interference channel (IC). For this IC model, a partial interference cancellation (PIC) method called Han-Kobayashi scheme can achieve the best-known achievable rate region. However, it needs perfect (precise and global) channel state information (CSI). For practical communication, CSI is usually imperfect (imprecise and local) due to channel estimation error and locality respectively. Hence the performance of the PIC scheme will be reduced inevitably. For this thesis, we analyze the performance of two-user IC with the PIC scheme and imprecise CSI. In addition, we utilize the local CSI to propose a dynamic power allocation algorithm combined the PIC scheme for fading IC. It''s shown that the performance is obviously enhanced compared with some traditional schemes. We further extend above result to uplink cellular with inter-cell interference, and combine the successive interference cancellation (SIC) and user-scheduling to analyze its performance.
Subjects
Power allocation
fading IC
imperfect CSI
local CSI
interference management
Type
thesis
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ntu-104-R02942098-1.pdf
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