NDLI: Robust Precoder-and-Receiver Design for Interference Suppression and Channel Uncertainty Restraint in Multi-User CoMP System

Content Provider	IEEE Xplore Digital Library
Author	Datong Xu Pinyi Ren Qinghe Du Li Sun
Copyright Year	2015
Description	Author affiliation: Dept. of Inf. & Commun. Eng., Xi'an Jiaotong Univ., Xi'an, China (Datong Xu; Pinyi Ren; Qinghe Du; Li Sun)
Abstract	Inter-user interferences (IEIs) and intra-user interferences (IAIs) may degrade the quality-of- service in JT (joint transmission)-CoMP (coordinated multi-point) systems. Interference alignment (IA) with prefect channel state information (CSI) can efficiently mitigate these interferences. However, in realistic systems, the effect of IA is obviously decreased via channel uncertainty with channel estimation and quantization errors. In this case, we propose a novelly robust precoder-and-receiver design scheme with IA (NRIA) for interference suppression and channel uncertainty restraint. In the NRIA, we first utilize precoding method to suppress the IEIs to each user generated by the users' actually acquired channels. Second, the receiver of each user is devised to alleviate the impact of IAI and channel uncertainty. Unlike the existing MU-MIMO schemes which introduce the statistical or bounded information of the above errors, the NRIA is a local scheme for JT and contains the instantaneous information of channel uncertainty. The instantaneous information can be abstracted through installing and sending special transmit signals from base stations to users without exorbitant overhead. The NRIA doesn't include any iteration, moreover, it can suppress interference and improve robustness compared with just using statistical or bounded information of channel uncertainty.
Starting Page	1
Ending Page	5
File Size	213860
Page Count	5
File Format	PDF
ISBN	9781479980888
DOI	10.1109/VTCSpring.2015.7146066
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-11
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Uncertainty Receivers Interference Complexity theory Robustness MIMO Channel estimation
Content Type	Text
Resource Type	Article

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