CDMA: principles of spread spectrum communication
CDMA: principles of spread spectrum communication
PN code acquisition using nonparametric detectors in DS/CDMA systems
Signal Processing
Spread Spectrum Systems: With Commercial Applications
Spread Spectrum Systems: With Commercial Applications
An Introduction to Spread-Spectrum Communications
An Introduction to Spread-Spectrum Communications
Microwave Mobile Communications
Microwave Mobile Communications
Locally optimum distributed detection of correlated random signals based on ranks
IEEE Transactions on Information Theory
IEEE Transactions on Information Theory
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A new PN code acquisition scheme is proposed based on the joint detection of correct cells (H1 cells) at which the code phase offset between the locally generated and received PN codes is within a desired small offset. Most of the acquisition schemes which have been proposed assume that there exists one and only one H1 cell over the uncertainty region. However, in practical systems, there exist multiple H1 cells. In this paper, using the locally optimum test statistic, the joint decision rule of two H1 cells is derived for nonselective Rayleigh fading channels. Then, with the proposed acquisition scheme based on the joint decision rule, a closed-form expression of the mean acquisition time is obtained with the state diagram, and the probabilities of detection, missing, and false alarm are derived. The mean acquisition time performance of the proposed acquisition scheme is compared with that of a conventional acquisition scheme in which only an H1 cell is used for detection at each step. The numerical results show that the proposed scheme not only has better performance but also is more robust to to the residual code phase offset variation than the conventional scheme.