Title :
Training-feedback tradeoff in closed-loop synchronous DS-CDMA systems with adaptive user sequences
Author :
Mukherjee, Amitav
Author_Institution :
Electr. Eng. & Comput. Sci., Univ. of California, Irvine, CA, USA
Abstract :
This paper considers a synchronous DS-CDMA system where channel state information at the base station is acquired via uplink training and channel feedback is used to provide the terminals with the optimal uplink signatures. We examine the tradeoffs involved in the proportioning of a resource block between training, data, and feedback symbols, with linear (matched filter and minimum mean-square error) receive processing at the BS with the user rate as the performance metric. Simulation results are presented to corroborate the analytical discussion.
Keywords :
closed loop systems; code division multiple access; least mean squares methods; matched filters; spread spectrum communication; synchronisation; wireless channels; adaptive user sequences; base station; channel feedback; channel state information; closed loop synchronous DS-CDMA systems; direct sequence code division multiple access; matched filter; minimum mean square error; optimal uplink signatures; training feedback tradeoff; uplink training; Adaptive systems; Costs; Error correction; Frequency selective surfaces; Interference; Military standards; Multiaccess communication; Proposals; Protection; Satellites;
Conference_Titel :
Military Communications Conference, 2009. MILCOM 2009. IEEE
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-5238-5
Electronic_ISBN :
978-1-4244-5239-2
DOI :
10.1109/MILCOM.2009.5379841
