pulse repetition frequency การใช้
- The pulse repetition frequency is in most cases around 70 to 90 MHz.
- Low, medium and high pulse repetition frequencies reduce effects of ground clutter.
- Some techniques using two alternating pulse repetition frequencies ( PRF ) allow a greater Doppler range.
- It also switches and staggers pulse repetition frequency and transmits random jitter to further confuse countermeasures.
- As electronics have improved many radars now can change their pulse repetition frequency, thereby changing their range.
- Pulse-Doppler radar was developed during World War II to overcome limitations by increasing pulse repetition frequency.
- Pulse Doppler relies on medium pulse repetition frequency ( PRF ) from about 3 kHz to 30 kHz.
- It was modulated with 2-ms pulses at a pulse repetition frequency ( PRF ) of 2000 Hz.
- Pulse Doppler radar relies on medium pulse repetition frequency ( PRF ) from about 3 kHz to 30 kHz.
- As radar transmits coherent pulses with a certain pulse repetition frequency ( PRF ), the doppler processing technique is applied.
- Also, for a given pulse repetition frequency ( PRF ), a shorter pulse results in a higher peak power.
- The direct frequency synthesis allows a wide range of pulse repetition frequencies, pulse widths, and modulation schemes to be created.
- Because of the Pulse Repetition Frequency ( PRF ) used, there is aliasing and the maximum non-ambiguous velocity is.
- Ranges between this could be selected by changing the broadcast frequency from 6 to 40 MHz and gated by varying the pulse repetition frequency.
- It has a variety of pulse repetition frequencies that are automatically selected depending on whether or not the antenna is looking up or down.
- Further work pushed this system to 50 kW, producing 10 kW of microwaves at a pulse repetition frequency of 2500 cycles per second.
- Switching the system to beacon mode slowed the pulse repetition frequency to give the signals more time to travel, stretching the range to.
- The radar operated at 106 MHz, using a pulse width from 10 to 25 microseconds, and a pulse repetition frequency of 621 Hz.
- Radar pulsing causes a phenomenon called aliasing, which occurs when the Doppler frequency created by reflector motion exceeds the pulse repetition frequency ( PRF ).
- Although relatively sophisticated, CH operators quickly adapted to these new jammers by periodically changing the pulse repetition frequency ( PRF ) of their station's transmitter.
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