Title :
A modified noncoherent PN code acquisition scheme
Author :
Pulikkoonattu, Rethnakaran ; Venkataraghavan, P.K. ; Ray, Tapan
Author_Institution :
Core Technol. Group, UbiNetics Inc., Bangalore, India
Abstract :
A modified noncoherent detector for PN code acquisition of direct sequence spread spectrum signals is introduced. The proposed detector, referred as differential noncoherent (DNC) detector, is suitable for popular CDMA systems and it performs better than classical noncoherent detector. The performance improvement is shown to be 2 dB in terms of SNR while false alarm and detection probabilities are used as measurement criteria. Under a good PN code sequence assumption, an exact analysis of the DNC detector is derived. The receiver operating characteristics (ROC) results for DNC detector are then plotted against noncoherent detector results to show performance improvement. Also, a system level simulation model of the proposed detection scheme is developed using a popular system level design tool and the simulated performance results are compared against theoretical results.
Keywords :
code division multiple access; differential detection; pseudonoise codes; sensitivity analysis; spread spectrum communication; CDMA systems; PN code acquisition; ROC; SNR; differential noncoherent detector; direct sequence spread spectrum signals; false alarm; receiver operating characteristics; system level design tool; system level simulation model; Band pass filters; Communication systems; Detectors; Filtering; Interference; Matched filters; Multiaccess communication; Research and development; Spread spectrum communication; System-level design;
Conference_Titel :
Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE
Print_ISBN :
0-7803-8344-3
DOI :
10.1109/WCNC.2004.1311785
