What is pulse compression ratio?
The pulse compression ratio, which is the duration of the long pulse divided by the duration of the short (compressed) pulse, is equal to BT. Frequency and phase modulations have both been used for pulse compression.
What are time Sidelobes?
Time-Side-Lobes At the output of the compression filter, sidelobes appear in addition to the target pulse. These sidelobes are offset in time (i.e. in distance) from the main pulse and are called time or range sidelobes.
What is pulse compression technique?
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 Compressed High Intensity radar pulse?
It is a technique used in radar and sonar systems because it is a method whereby a narrow pulse with high peak power can be derived from a long duration pulse with low peak power.
What is LFM signal?
In modern radar and communication systems, Linear Frequency Modulation (LFM) signal is a kind of typical non- stationary signal. It is important to recognition and estimate the parameter of LFM signal fast and precisely for radar electronic reconnaissance and resistance system.
Are Sidelobes desirable in primary radar?
The sides lobes are an important parameter and techniques in a radar system are used to reduce these such as amplitude weighting. So in the radar system they are not desirable, and reducing to a minimum is important.
What is radar bandwidth?
Bandwidth B, BW or Δf is the difference between the upper and lower cut-off frequencies of radar receiver, and is typically measured in hertz. In case of a baseband channel or video signal, the bandwidth is equal to its upper cut-off frequency.
What is range resolution?
Range resolution is the ability of a radar system to distinguish between two or more targets on the same bearing but at different ranges. The degree of range resolution depends on the width of the transmitted pulse, the types and sizes of targets, and the efficiency of the receiver and indicator.
What is LFM modulation?
INTRODUCTION. In modern radar and communication systems, Linear Frequency Modulation (LFM) signal is a kind of typical non- stationary signal. It is important to recognition and estimate the parameter of LFM signal fast and precisely for radar electronic reconnaissance and resistance system.
What is linear FM waveform?
Definition of Linear FM Pulse Waveform which is a linear function of t with slope equal to β/τ. The complex envelope of a linear FM pulse waveform with decreasing instantaneous frequency is: x ˜ ( t ) = a ( t ) e − j π β / τ ( t 2 − 2 τ t ) Pulse compression waveforms have a time-bandwidth product, βτ, greater than 1.