DocumentCode :
3414077
Title :
A precoder for reducing downlink interference from femtocells to macro users based on cognitive radio
Author :
Hou, Xueying ; Ling, Wei ; Xu, Zhikun ; Yang, Chenyang
Author_Institution :
Sch. of Electron. & Inf. Eng., Beihang Univ., Beijing, China
fYear :
2010
fDate :
24-28 Oct. 2010
Firstpage :
1663
Lastpage :
1666
Abstract :
This paper proposes a preprocessor for femtocell base stations to avoid the downlink interference to the macro users, where both systems are multicarrier systems. By using the concept of cognitive radio, we design a low complexity transmitter including a precoder followed by a power allocation. With the judicious design of the interference tolerant constraints, the performance degradation of the macro user is controlled to be less than a predetermined value. Simulation results show that the spectrum efficiency of the femtocell system with the presented transmitter is improved significantly.
Keywords :
cellular radio; codecs; cognitive radio; interference (signal); radio transmitters; cognitive radio; downlink interference; femtocell base station preprocessor; femtocells; low complexity transmitter; macro user; precoder; Downlink; Femtocells; Frequency domain analysis; Interference; Macrocell networks; OFDM; Resource management; cognitive radio; femtocell; interference; preceding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing (ICSP), 2010 IEEE 10th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-5897-4
Type :
conf
DOI :
10.1109/ICOSP.2010.5656449
Filename :
5656449
Link To Document :
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