Title :
TDD cognitive radio femtocell network (CRFN) operation in FDD downlink spectrum
Author :
Berangi, Reza ; Saleem, Shahryar ; Faulkner, Michael ; Ahmed, Waqas
Author_Institution :
Iran Univ. of Sci. & Technol., Tehran, Iran
Abstract :
Deploying cognitive radio femtocell network (CRFN) inside a macrocell network can significantly increase the utilization of the available macrocell bandwidth and increase the capacity of the macrocell. However, the success of this deployment in terms of performance degradation of the macrocell and the acceptable throughput for the CRFN is not well defined. In this paper, we propose a time division duplex (TDD) operation of a CRFN and investigate its performance inside a macrocell operating in frequency division duplex (FDD) mode. It is shown that with a proper sensing and transmission scheme the capacity of the CRFN can be increased by simultaneous transmissions on multiple channels, water-filling further improves the result when interference from the macrocell basestation is large. The proposed scheme is applicable to full duplex networks, such as LTE and GSM.
Keywords :
cellular arrays; cognitive radio; femtocellular radio; frequency division multiplexing; interference suppression; logic arrays; time division multiplexing; CRFN; FDD downlink spectrum; FDD mode; TDD cognitive radio femtocell network; duplex networks; frequency division duplex; interference; macrocell bandwidth; macrocell basestation; macrocell network; multiple channels; performance degradation; time division duplex; water-filling; Availability; Interference; Macrocell networks; Rayleigh channels; Scattering; Sensors;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4577-1346-0
Electronic_ISBN :
pending
DOI :
10.1109/PIMRC.2011.6140008