Title :
Rate maximization for multi-code CDMA with optimized signatures
Author :
Rajappan, Gowri S. ; Honig, Michael L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Northwestern Univ., Evanston, IL, USA
Abstract :
Joint transmitter/receiver optimization is studied for a direct-sequence (DS) code division multiple access (CDMA) system with multipath. Two optimization problems are considered corresponding to voice and data services, respectively: (i) minimizing the average transmitted power subject to a received signal-to-interference-plus-noise (SINR) constraint; (ii) maximizing the data rate subject to a transmitted power constraint. In the latter case, the rate is maximized by introducing multiple optimized spreading codes. Numerical results are presented which compare achievable rates with multi-code optimization vs. single-code optimization in the presence of fixed random interferers.
Keywords :
Gaussian noise; code division multiple access; covariance matrices; data communication; eigenvalues and eigenfunctions; minimisation; radio receivers; radio transmitters; radiofrequency interference; spread spectrum communication; voice communication; DS-CDMA; Gaussian noise; SINR; average transmitted power minimization; covariance matrix; data rate maximization; data service; direct-sequence code division multiple access system; eigenvectors; multi-code CDMA; signal-to-interference-plus-noise ratio; single-code optimization; spreading codes; voice service; Cellular networks; Constraint optimization; Covariance matrix; Delay; Fading; Feedback; Interference constraints; Multiaccess communication; Signal to noise ratio; Transmitters;
Conference_Titel :
Military Communications Conference, 2001. MILCOM 2001. Communications for Network-Centric Operations: Creating the Information Force. IEEE
Print_ISBN :
0-7803-7225-5
DOI :
10.1109/MILCOM.2001.986080
