A possible approach which can be employed in the detection and tracking of frequency hopped signals with processing gains in excess of 104 is discussed.The algorithm presented allows for a receiver realization of considerably reduced complexity as compared to the full channelized receiver structure commonly employed in the detection of frequency hopped signals.In particular,a front-end preprocessor performs a coarse sub-band channel selection for further processing by the second receiver stage,thereby resulting in a possible reduction in hardware complexity by a factor of as much as 10 or more.By employing delay lines at the input to the second receiver stage the original input signal can be further processed with only a small degradation in detection probability as compared to a full channelized receiver.
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