Open AccessCooperative interference cancellation for cellular networks with imperfect CCSI
Author(s) -
Ustok Refik Fatih,
Dmochowski Pawel A.,
Smith Peter J.,
Shafi Mansoor
Publication year - 2016
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2015.0897
Subject(s) - computer science , precoding , telecommunications link , base station , imperfect , interference (communication) , cellular network , zero forcing precoding , single antenna interference cancellation , channel (broadcasting) , computer network , telecommunications , mimo , linguistics , philosophy
In this study, the authors investigate the impact of cooperation in an interference limited downlink cellular network. The authors identify the areas in which the transmissions of adjacent cells overlap in a 19 cell network for urban and suburban environments. They assume that the cooperative users are located in these overlapping areas and thus can receive channel information from neighbouring base stations (BSs) to cancel intercell interference. They also study the performance of such systems with various types of precoding techniques. They demonstrate that they can improve the system performance employing precoders that maximise signal‐to‐leakage‐noise ratios for each user. They also consider imperfect cross channel state information (CCSI) between cooperative users and interfering BSs. Furthermore, they analytically derive the additional intercell interference that is caused by imperfect CCSI at the receivers. The results demonstrate that the system can achieve better sum rates with cooperation, however this improvement is susceptible to the accuracy of the CCSI. They show that imperfect CCSI degrades the cooperation gains drastically.