Spread spectrum, acquisition and tracking

This report discusses the following subjects: a new rapid acquisition technique for direct sequence spread spectrum communications. The rapid acquisition technique described here can be used in direct sequence spread spectrum systems. The technique employs a double threshold which defines when a decision can be made. These thresholds change at each examination instant. Using this technique a significant reduction in the acquisition time of a direct sequence spread spectrum signal is obtained. A new double threshold acquisition scheme applied to the fading channel in frequency hopping spread spectrum.