Title :
Gradient Descent Interference Avoidance with Target SIR Matching
Author :
Popescu, D.C. ; Popescu, O. ; Rawat, D.B.
Author_Institution :
Old Dominion Univ., Norfolk
Abstract :
In this paper we present a new algorithm for joint codeword and power adaptation in the uplink of code division multiple access (CDMA) systems, in which codewords are adjusted using gradient-descent interference avoidance, and powers are updated to match target signal-to-interference plus noise-ratio (SINR) values. The proposed algorithm is analyzed and illustrated with numerical examples obtained from simulations.
Keywords :
code division multiple access; gradient methods; interference (signal); CDMA system; code division multiple access; codeword adaptation; gradient descent interference avoidance; signal-to-interference plus noise-ratio; AWGN; Additive white noise; Contacts; Covariance matrix; Gaussian noise; Interference; Multiaccess communication; Signal processing; Signal to noise ratio; Transmitters;
Conference_Titel :
Consumer Communications and Networking Conference, 2008. CCNC 2008. 5th IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1456-7
Electronic_ISBN :
978-1-4244-1457-4
DOI :
10.1109/ccnc08.2007.51
