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Why digital modulation is not enough for radio transmission and what are the general goals for digital modulation?
Wiki User
∙ 12y ago
Worldwide regulation always uses FDM for separating different systems (TV, WLAN, radio, satellite …). Thus, all radio systems must modulate the digital signal onto a carrier frequency using analogue modulation. The most prominent system is the traditional radio: all music and voice use frequencies between, e.g., 10 Hz and 22 kHz. However, many different radio stations want to transmit at the same time.
Therefore, all the original signals (which use the same frequency range) must be modulated onto different carrier frequencies. Other motivations for digital modulation are antenna and medium characteristics. Important characteristics for digital modulation are spectral efficiency, power efficiency and robustness. Typical schemes are ASK, PSK, FSK.
Wiki User
∙ 12y ago
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What are three stages that sound passes through when it is computerized?
The three stages are: 1. Digitize or input sound 2. Store the digital data 3. Reproduce or synthesize the sound While the above is true, you may be looking for a different set of steps: 1. The analog audio passes through some type of pre-amp to amplify the signal enough to digitize. 2. The pre-amp passes the analog audio to an analog to digital (A/D) converter. 3. The A/D passes the now digital audio to an encoder that encodes the audio to the desired format and writes it to disk. Sometimes the encoder just writes the uncompressed stream to disk, or sometimes it is encoded live to a format like mp3. This all depends on the specific application. ---- The above answers are true, but here is my textbook's version of the answer: "Sound passes through three stages when it is computerized: # First, the sound is digitized-- that is, converted from analog to digital. # Second, the digital data is stored in a compressed data file. # Third and last, the sound is reproduced or synthesized (digital to analog or digital out)."
When is A Medical oxygen tank empty?
In general any pressurized gas container is "empty" when the pressure inside is equal to ambient air pressure. There is still gas in the container, but not enough pressure to expell the gas. Medical oxygen tanks should never be allowed to go below 200psi. The tank is considered empty at this point and should be replaced.
Why wont farmtown load?
Your computor's processing power may not be enough, your graphics card may not be modern enough or farmtown hates you. Take your pick.
Why is your pcsx2 so slow?
It is usually because the computer is not good enough to run it. If you think your PC is good enough, then its most likely the setup of the video plugins. Check out the like:
What type of site is Darkwarez?
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What is clarity and voice modulation?
clarity is the quality of being clearly heard and easily understood; while voice modulation refers to the adjustment of the pitch or tone of voice to become enough to be clearly heard and understood by the audience.
Why analog signal convert into digital signal?
Because an analog signal takes up more bandwidth than the new digital format. By cutting off the analog signals and offering digital only, it frees up enough space on the network to offer services to a wider range of people. It also includes enhancements to the providers network. For example, faster internet speeds, more TV channels, and more features.
Where is amplitude modulation used?
we have two types of signals namely the message signal and the carrier signal. so if the amplitude of the carrier is varied in accordance with the instantaneous value of the message signal then it is known as the amplitude modulation.if we want to transmit our message signal to long distances we need to do modulation and hence amplitude modulation is done. by amplitude modulation we generate side bands which consists of the part of the message which signal which is demodulated at the receiver to get back the original message signal we are using this amplitude modulation in radio communication. It will work in the traffic also with out disturbances but frequency modulation didn't work without disturbances.
Forwarding a call on a digital phone?
What brand, model is your digital phone? We can't help you on your call forwarding question if you are not specific enough.
Why wont your 2000 TOYOTA Camry shift in to 1ST and 4TH gear?
First of all you need to check if you have enough transmission fluid in the system. If you the level is right, you have to bring the car to your mechanic. Actually even Toyota almost does not fix transmission they just replace it, if it has general mechanic failure.
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Yes, with enough money anything is possible.
Are 200 metrics transmission good behind 350 Chevy motor?
No they are not strong enough. No they are not strong enough.
Can a hemi engine and transmission out of a charger or magnum be put in a 2003 dodge ram?
The engine may work, but the transmission is not the same. With enough time and money it may work, but it won't be easy.The engine may work, but the transmission is not the same. With enough time and money it may work, but it won't be easy.
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some silly rap talk that makes no sense, suprisingly enough
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A digital camera tripod needs to be very sturdy and stable and also tall enough to accomadate you.
Why won't your 1995 sportage automatic transmission shift until it warms up?
Because you don't have enough the transmission fluid in the system.
What happens when you use too much transmission fluid?
You may damage the transmission seals. Remove enough to get it down to the proper level.
