Title :
On the achievable rate region of gaussian cognitive multiple access channel
Author :
Cheng, Peng ; Yu, Guanding ; Zhang, Zhaoyang ; Chen, Hsiao-Hwa ; Qiu, Peiliang
Author_Institution :
Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou
fDate :
5/1/2007 12:00:00 AM
Abstract :
We consider the communication scenario where multiple cognitive users wish to communicate to the same receiver through AWGN channels, in the presence of primary transmission. The cognitive users are assumed to have the side information about the primary transmission. The achievable rate region of cognitive users is formulated under the constraint that the rate of primary transmission is not changed as if no cognitive users existed. Moreover, the maximum achievable sum-rate point of the rate region is characterized
Keywords :
AWGN channels; cognitive radio; multi-access systems; radio receivers; AWGN channel; additive white Gaussian noise; cognitive communication scenario; multiple access channel; receiver; AWGN channels; Chromium; Cognitive radio; Gaussian noise; Information theory; Interference constraints; Lagrangian functions; Land mobile radio cellular systems; Licenses; Wireless LAN;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.070084
