Signal acquisition apparatus and method for reducing false alarm rate
AssigneeSamsung Electronics Co., Ltd.
InventorsYun-young Kim, Jae-hyun Koo, Yeon-gon Cho, Jae-ho Roh
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Abstract
A signal acquisition apparatus and method for reducing a false alarm rate are disclosed. The apparatus includes a comparator for detecting a first peak by comparing a correlation value of a received signal with a first threshold and detecting second peaks in a sample interval of the detected first peak based on a second threshold which is different from the first threshold. Thus, a signal is acquired based on a number of the detected second peaks. Accordingly, the false alarm rate due to the noise can be reduced while the detection probability is maintained even at a high SNR.
Claims36
A signal acquisition apparatus for reducing a false alarm rate, comprising:
- a matched filter which calculates a correlation value of a received signal;
- an absolute value calculator which calculates an absolute value from an output value of the matched filter and outputs a magnitude of the correlation value;
- a received power estimator which measures a power of the received signal;
- a scale factor selector which selects a first scale factor to be applied to a first threshold in a first peak detection of the received signal, and selects a second scale factor which is different from the first scale factor, to be applied to a second threshold in a second peak detection after the first peak detection;
- a multiplier which multiplies an output value of the received power estimator by a scale factor selected by the scale factor selector;
- a comparator which compares an output value of the absolute value calculator with an output value of the multiplier;
- and
- a peak counter which counts in a sample interval a number of second peaks of which output value from the absolute value calculator exceeds the second threshold according to a comparison result of the comparator.
A signal acquisition method for reducing a false alarm rate, comprising:
- detecting a first peak by comparing a correlation value of a received signal with a first threshold;
- detecting second peaks in a sample interval of the detected first peak based on a second threshold which is different from the first threshold;
- and
- determining whether a signal is acquired based on a number of the detected second peaks.
A signal acquisition apparatus for reducing a false alarm rate, comprising:
- a comparator which detects first peaks of a signal based on a first threshold and detects second peaks of a signal based on a second threshold;
- and
- a peak counter which counts the detected second peaks,
- wherein the signal acquisition is determined based on the number of second peaks counted by the peck counter.
Dependencies are inferred from the claim text.