Serial Acquisition of PN Code for DSSS Communications
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초록
In this paper, we introduce an adaptive acquisition scheme of PN sequences to control false alarm rates (FAR's) whose threshold is obtained from the estimator of the background power level. By the way, coarse synchronization process uses more than two samples of the PN correlator output per chip. The multiple sampling per chip causes the outputs of PN correlator to be correlated. Thus we need to analyze the acquisition performance of the correlated outputs even though most works have been done under the uncorrelated assumptions. The results show that the more the correlation, the lower the acquisition probability becomes. We also analyze the mean acquisition time (MAT) of the proposed acquisition scheme for a double dwell model. It is shown that MAT decreases with the order of multiple sampling.
Abstract
In this paper, we introduce an adaptive acquisition scheme of PN sequences to control false alarm rates (FAR's) whose threshold is obtained from the estimator of the background power level. By the way, coarse synchronization process uses more than two samples of the PN correlator output per chip. The multiple sampling per chip causes the outputs of PN correlator to be correlated. Thus we need to analyze the acquisition performance of the correlated outputs even though most works have been done under the uncorrelated assumptions. The results show that the more the correlation, the lower the acquisition probability becomes. We also analyze the mean acquisition time (MAT) of the proposed acquisition scheme for a double dwell model. It is shown that MAT decreases with the order of multiple sampling.