0
SINGLE POLARITY:
In single polarity PAM the height of the pulse is made larger than the maximum negetive value of the signla so that it remains positive even when the input is negetive
DOUBLE POLATRITY:
In double polarity PAM the pulse height is made proportional to the amplitude of the signal at the instant of the sampling
P.Nagarjuna
B-tech 3rd year, ECE,
Sri Indu college of engineering and technology
What else can I help you with?
Which modulation scheme requires the least minimum bandwidth?
Suppressed carrier single sideband amplitude modulation - SCSSBAM.
In order to send more than one bit at a time during a single phase on a carrier modulation is used?
amplitude modulation is used
What are the different forms of amplitude modulation?
There are many types of modulation. A few examples...AmplitudeFrequencyPhase ShiftModified Frequency (MFM)Non Return to Zero Inverted (NRZI)Frequency Shift Keying (FSK)Other contributors - Please add to this list
What is meant by single side band modulation?
Single side band suppressed carrier modulation is like amplitude modulation except that one of the sidebands is suppressed or filtered out. Each sideband carries the same though opposite, information, so suppressing the one sideband allows more power to be placed into the one remaining sideband. The downside, of course, is that the demodulation process is more complex.
What is the difference between pulse code and pulse amplitude in brief and concise terms?
In pulse amplitude modulation (PAM), you send a single pulse of a certain height (amplitude) that represents the value of the sampled signal at that time. With pulse code modulation (PCM), you take the same sampled value, but now represent that value by N bits, where N is the number of quantized regions. Why send a whole bunch of bits instead of just a single pulse? Because PCM performs better in situations of higher noise (AWGN).
Which modulation scheme requires the least minimum bandwidth?
Suppressed carrier single sideband amplitude modulation - SCSSBAM.
What is analog modulation?
Analog modulationIn analog modulation, the modulation is applied continuously in response to the analog information signal.Common analog modulation techniques are:Amplitude modulation (AM) (here the amplitude of the modulated signal is varied) Double-sideband modulation (DSB) Double-sideband modulation with unsuppressed carrier (DSB-WC) (used on the AM radio broadcasting band)Double-sideband suppressed-carrier transmission (DSB-SC)Double-sideband reduced carrier transmission (DSB-RC)Single-sideband modulation (SSB, or SSB-AM), SSB with carrier (SSB-WC)SSB suppressed carrier modulation (SSB-SC)Vestigial sideband modulation (VSB, or VSB-AM)Quadrature amplitude modulation (QAM)Angle modulation Frequency modulation (FM) (here the frequency of the modulated signal is varied)Phase modulation (PM) (here the phase shift of the modulated signal is varied)
How does amplitude modulation transmit ones to zeros?
Amplitude modulations can be used to transmit binary data. Remember AM modulation is done using a single carrier frequency, and increasing or decreasing the amplitude. A high amplitude would be considered a '1', and a low amplitude would be considered a '0' (typically).
In order to send more than one bit at a time during a single phase on a carrier modulation is used?
amplitude modulation is used
What are the different forms of amplitude modulation?
There are many types of modulation. A few examples...AmplitudeFrequencyPhase ShiftModified Frequency (MFM)Non Return to Zero Inverted (NRZI)Frequency Shift Keying (FSK)Other contributors - Please add to this list
What is advantage of single side band?
An advantage of a single side band (SSB) is that it only needs half the bandwidth of AM. AM stands for amplitude modulation.
What has the author Edward Bedrosian written?
Edward Bedrosian has written: 'Applications of Volterra-system analysis' -- subject(s): Volterra equations, System analysis 'Transionospheric propagation of FM signals' -- subject(s): Signal theory (Telecommunication) 'Mutual interference in fast-frequency-hopped, multiple-frequency-shift-keyed, spread-spectrum communication satellite systems' -- subject(s): Computer simulation, Communication systems, Artificial satellites in telecommunication, Military telecommunication, Interference, Radio, Spread spectrum communications, Armed Forces 'Amplitude and phase demodulation of filtered AM/PM signals' -- subject(s): Pulse modulation (Electronics), Amplitude modulation 'A comparison of single-sideband, suppressed-carrier and double-sideband, full-carrier amplitude modulation' -- subject(s): Amplitude modulation
What is meant by single side band modulation?
Single side band suppressed carrier modulation is like amplitude modulation except that one of the sidebands is suppressed or filtered out. Each sideband carries the same though opposite, information, so suppressing the one sideband allows more power to be placed into the one remaining sideband. The downside, of course, is that the demodulation process is more complex.
AM wave frequencies are?
AM stands for Amplitude Modulation. Whatever radio frequency you use, a single frequency would just produce silence at the receiver. You need to superimpose sound frequencies onto the carrier wave. Amplitude modulation does this by varying the Amplitude (strength, power) of the radio carrier wave in time with audio frequency. AM is therefore the kind of 'coding' used and has nothing to do with frequency. By convention, amplitude modulation is mostly used in the medium and long, radio waves. From 150 to 1600 Khz. AM is also used for air band communications at 121Mhz, whereas FM is used at marine frequencies of 156Mhz.
What is the difference between pulse code and pulse amplitude in brief and concise terms?
In pulse amplitude modulation (PAM), you send a single pulse of a certain height (amplitude) that represents the value of the sampled signal at that time. With pulse code modulation (PCM), you take the same sampled value, but now represent that value by N bits, where N is the number of quantized regions. Why send a whole bunch of bits instead of just a single pulse? Because PCM performs better in situations of higher noise (AWGN).
Is single transistor radio am or FM?
A single transistor radio can be designed to receive either AM (Amplitude Modulation) or FM (Frequency Modulation) signals, depending on its circuitry. The basic principle of operation is similar for both types, but the design specifics, such as the type of detector and tuning circuit used, differ. Generally, simpler designs are often associated with AM radios, while FM radios may require more complex circuitry to handle the modulation. Therefore, the type of modulation depends on the intended design of the radio.
How does a qam conserves bandwidth?
Quadrature Amplitude Modulation (QAM) conserves bandwidth by combining both amplitude and phase modulation to transmit multiple bits of data per symbol. By varying the amplitude of two carrier waves that are out of phase with each other, QAM can represent multiple symbols in a single transmission, effectively increasing the data rate without requiring additional bandwidth. This allows for more efficient use of available spectrum, accommodating higher data rates in limited frequency channels.
