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Is it possible to transmit a digital signal coded as square wave as used inside a computer using radio transmission without loss?
Wiki User
∙ 9y ago
Digital signals are regularly transmitted by radio systems. The traditional way of doing it was by frequency-shift keying (FSK) where the frequency was changed slightly between two states which represented logical 0 and 1. Another method uses phase-shift keying (PSK) which uses two phase states of the carrier wave to represent 0 and 1.
The main issue in transmitting data by radio is the bandwidth, and with 2-state modulation like FSK or PSK the bandwidth must exceed the bit rate. Another important issue is signal-to-noise ratio because radio signals can become very weak over long distances.
Alternative systems are now available in which the modulation can have more than 2 states. For example four alternative phase states instead of two can be used for each symbol, which allows 4 bits to be transmitted per symbol instead of two, so the data rate is doubled for the same bandwidth.
General quadature-amplitude modulation (QAM) keying employs M amplitude states and N phase states to transmit MN bits in each symbol. This might seem a good idea but the disadvantage with using high values of M and/or N is that it requires a very high signal-to-noise ratio.
A popular choice of modulation for data transmission using radio links in which the bandwidth and the signal strength are limited is quadrature phase-shift keying (QPSK) which provides a good compromise between data rate, bandwidth and signal-to-noise ratio.
Wiki User
∙ 9y ago
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How radio repeaters work?
A radio repeater works by having the transmitter and receiver on separate frequencies. This allows the transmitter to re-transmit the received audio or data. To prevent the transmitter from opening due to noise on the receiver most systems will only re-transmit if they receive a keying tone at the start of the transmission, a sub audible tone which is transmitted with the normal modulation or a digital code. Some repeaters use a separate antenna for transmit and receive although most use a single antenna and a filtering arrangement to split the transmit and receive frequencies. This filter is called a duplexer as it permits duplex operation.
Is radio a digital computer?
-- The principles of radio were developed by Maxwell in the 1870s and Hertz in the 1880s,followed by Marconi and DeForest in the 1890s and 1900s.-- The first full-time radio station, KDKA in Pittsburgh, began broadcasting in 1920.-- The principles of digital computing were developed by Turing in the late 1930s.-- DAB radio (Digital Audio Broadcasting) was developed in the 1980's as European project. The first regular digital transmission was made in 1995 in Norway. The BBC radio is in digital format since 2001.So in answer to your question. All radios are notdigital computers. But if you have a DAB radio or a Satellite radio, they will have digital computers inside them, to decode the digital signal.
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Is it possible to transmit a digital signal coded as square wave as used inside a computer using radio transmission without any loss?
I submit there are always losses except on a perpetual moving machine which does not exists
Is it possible to transmit digital signal in the air?
yes it is possible
Is It possible to transmit a digital signal eg coded as square wave as used Inside a computer using radio transmission without any loss?
I submit there are always losses except on a perpetual moving machine which does not exists
Is it possible to transmit the digital signal using radio transmission without any loss?
The lossless of an analogous signal is not possible. The two things that will be present all of the time is dispersion, and attenuation.
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modem means modulator demodulator. it converts digital signal to analog signal. it is use to transmit computer signal (digital signal) over the telephone line to communicate to other computers. modem converts the computer digital signal into frequency (analog signal) so that it can transmit over the telephone line and at the receiving end the modem converts the analog signal back to digital for the receiving computer to understand it.
What method of signal transmission uses radio waves to carry signals?
The analog method of signal transmission uses radio waves to carry signals. Digital transmission involves the use of satellites to transmit signals.
What is digital transmission of analog data?
it means that you digitize analog data for transmission . Like 2 computer that chatting .
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ANALOG:continuous,rate of transmission is slow,less reliable 2 transmit,more noise,interference is more DIGITAL:non continuous,rate of transmission is fast,more reliable 2 transmit,less noise,interference is less
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A computer that receives requests from another computer to transmit the stored digital files of a website is a?
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What types of signals are used to transmit data on a wireless network?
none no1 lks u
