What is pulse compression gain?

What is pulse compression gain?

Pulse compression is a signal processing technique commonly used by radar, sonar and echography to increase the range resolution as well as the signal to noise ratio. This is achieved by modulating the transmitted pulse and then correlating the received signal with the transmitted pulse.

What is range compression radar?

15.1 INTRODUCTION. Pulse compression allows a radar system to transmit a pulse of relatively long. duration and low peak power to attain the range resolution and deteCtion per- formance of a short-pulse, high-peak power system.

What is a pulse compression filter what is the objective of a pulse compression processing?

The goal of pulse compression is to transmit a long duration pulse of high energy, but to detect a short duration pulse to localize the receive filter output response to one or at most two radar range bins. Early radars accomplished this by transmitting a signal with linear frequency modulation.

Who invented pulse compression?

Sperry
Pulse compression (aka ‘chirp’) radar was invented in the 1950s by Sperry and a couple other defense contractors.

What is pulse repetition time?

Pulse repetition frequency (PRF) indicates the number of ultrasound pulses emitted by the transducer over a designated period of time. It is typically measured as cycles per second or hertz (Hz). In medical ultrasound the typically used range of PRF varies between 1 and 10 kHz 1.

How is pulse compression used in the radar equation?

In the radar equation, the advantage of intrapulse modulation and pulse compression must be seen as an increase in range. In the equation the pulse compression ratio PCR or N is often entered directly, i.e. the transmitted pulse length and the length of the compressed pulse.

What is the purpose of pulse compression in sonar?

Pulse compression is a signal processing technique commonly used by radar, sonar and echography to increase the range resolution as well as the signal to noise ratio.

How is signal detection enabled by pulse compression?

Implemented electronically, one can say that receivers measure voltage. Detection is enabled by the boost in the ratio of Signal voltage (increased by 10 dB thanks to pulse compression) to Noise voltage (unchanged by pulse compression).

How is the range resolution of a pulse modulated radar calculated?

For further calculations, the time-bandwidth product is introduced, the derivation of which results from the ratio of the different range resolutions: The range resolution of a pulse modulated radar is therefore a multiple (by a factor of the Pulse Compression Rate PCR) of the range resolution of an intra-pulse modulated radar: