radar
Radar
Radar locates objects with radio waves.
radar
PPM=Pulse Position Modulation is suited for data communications via optical fiber or short distance line-of-sight as in radio control models. A pulse is encoded by placing it in a specific position in time. Proper sync is required and transmission distortion can render it useless. FM=Frequency Modulation which is more suited for audio communications as in broadcast radio or personal communicators. The modulation of a carrier is accomplished by causing the frequency of the carrier to vary as a function of the audio. The speed of the variation is the frequency of the audio and the amount of the variation is the amplitude of the audio.
Microwaves are a frequency of electromagnetic radiation. It has a higher frequency than radio waves, but has a lower frequency than infrared light.
radar
radar -note this word is a palindrome (palindromes are words that are spelt the same whether you write/read it forwards or backwards)
Radar
Radar locates objects with radio waves.
radar
radar
That process is never used, and has no name, since the process of sending outthe pulse can't tell you any information about the position of an object.However, if you collect and analyze some of the energy in the pulse after it reflectsoff of the solid object and returns to you, then you can derive a lot of informationrelated to the object's position, shape, composition, and speed. This technique isquite effective, is widely used, and is known as 'RADAR' .
Pulse Radio was created in 1999.
No single frequency, it is a wide bandwidth pulse that can contain frequencies well below the AM radio band into the high microwave band.
RFID stands for radio frequency identification. Basically it's a small radio that's sitting there listening. When another radio sends out the message"who are you" the transponder responds by sending out an identification code.
RFID stands for radio frequency identification. Basically it's a small radio that's sitting there listening. When another radio sends out the message"who are you" the transponder responds by sending out an identification code.
radar