System and method for detecting pulses in received signal in streaming manner

Abstract

The disclosure relates to a system and a method for detecting pulses in received signals in a streaming manner. A threshold detection method is fused with a double-difference phase modulation detection method to provide a higher-performance method of pulse detection for any digital receiver. The first pulse detection technique uses a signal power threshold. When the square of the magnitude of a pulse crosses the signal power threshold, the beginning of a pulse is declared and pulse processing starts. The second pulse detection technique is model based and uses a windowed detector that crossesa phase difference threshold when the pulse has consistent second-order (in general d-th order) difference phase values within the window. The first technique has low latency and is independent of pulse width, but only operates well at SNR values greater than 15 dB. The second technique has higher latency and requires a minimum pulse width, but operates at lower (approximately 0 dB) SNR values.

Description

technical field [0001] The techniques disclosed herein generally relate to radar pulse detection. In particular, it relates to radar pulse detection using digital radar receivers. Background technique [0002] A receiver system is any system configured to receive energy waves and process these energy waves to identify desired information carried in the energy waves. As used herein, an "energy wave" is a disturbance that propagates through at least one medium while carrying energy. For example, energy waves may include electromagnetic waves, radio waves, microwaves, sound waves, or ultrasound waves. [0003] Typically, a receiver system includes a transducer and a receiver. A transducer may be any device configured to convert one type of energy into another type of energy. Transducers used in receiver systems are typically configured to receive energy waves and convert these energy waves into electrical signals. An antenna is an example of a transducer. The receiver pro...

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Problems solved by technology

This approach therefore limits the processing of pulses to those with a relatively high signal-to-noise ratio (pulses that are easily distinguished from noise)

This in turn limits the detection range of any receiver using thresholding techniques (unless the transmitter signal power is increased)

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