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Spread Spectrum Acquisition under Narrow Band Interference

The acquisition statistics of DS systems when under the influence of narrowband interference are predicted. Tone jamming increases the variance of the detection variable; as a result it significantly influences the probabilities of detection and false alarm of the receiver. The effects of jamming on acquisition time are also assessed for particular acquisition schemes. Finally, the results of these analyses are used to propose a receiver which mitigates the deleterious effects of the jamming. The primary observation is the need for the acquisition receiver to sense and adapt to jamming. A proposed adaptive receiver provides considerable jamming protection and the acquisition performance obtained with such a receiver bounds the performance of all adaptive acquisition receivers.