23 July 2003 Joint PN code acquisition and DOA estimation technique for asynchronous DS-CDMA with antenna arrays
Author Affiliations +
Abstract
An array processing approach to joint PN (pseudo-noise) code acquisition and DOA (direction-of-arrival) estimation in asynchronous direct-sequence code-division multiple access (DS-CDMA) systems is proposed. This problem is traditionally treated as a 2-D search problem in the space-time domain. Our approach transforms the 2-D space-time matrix data from the antenna output to several time domain vectors using a set of beams steering to different directions. Then, the acquisition process searches from these 1-D temporal vectors to provide soft information for the next stage, i.e. DOA estimation. Our algorithm is a blind approach, where the training sequence is not needed. Besides, the number of antennas required can be much less than that of the incoming signals, and the DOA search range can be largely reduced based on the soft information from the acquisition process. Numerical simulations are presented to demonstrate that the proposed solution is resistant to the near-far effect and robust to the change of the fading environment.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Chiao-Yao Chuang, Chiao-Yao Chuang, C.-C. Jay Jay Kuo, C.-C. Jay Jay Kuo, } "Joint PN code acquisition and DOA estimation technique for asynchronous DS-CDMA with antenna arrays", Proc. SPIE 5100, Digital Wireless Communications V, (23 July 2003); doi: 10.1117/12.487588; https://doi.org/10.1117/12.487588
PROCEEDINGS
12 PAGES


SHARE
Back to Top