Signals of different frequencies cannot interfere with each other. For example can audio waves (speech) interfere with AM or FM signals?? So when we perform modulation we just transfer the message to another amplitude/frequency/phase. Hence they will never interfere with signals which are not in the same range as them.
Regards
Arvind
The degree of modulation refers to the extent to which a carrier signal is modified by an information signal in amplitude modulation (AM) or frequency modulation (FM). It is typically expressed as a percentage, indicating the ratio of the amplitude of the modulating signal to the amplitude of the carrier signal. A higher degree of modulation results in a stronger signal with better fidelity, but excessive modulation can lead to distortion and signal clipping. In AM, for example, a degree of modulation exceeding 100% can cause overmodulation, distorting the transmitted signal.
Need for modulation 1) to reduce the antenna height 2) to multiplex the more number of signals 3) to reduce the noise & distortions 4) to narrow banding the signal 5) to reduce equipment
AM imply amplitude modulation of a carrier signal
modulating signal is the message to be carried by the carrier signal.
To overcome the limitations of delta modulation, such as slope overload and granular noise, one can implement adaptive delta modulation (ADM), which adjusts the step size based on the signal's characteristics. Additionally, using predictive coding techniques can enhance performance by anticipating changes in the signal and optimizing the modulation process. Employing filters to smooth the output can also help reduce noise and improve the overall quality of the signal reconstruction.
Need for modulation 1) to reduce the antenna height 2) to multiplex the more number of signals 3) to reduce the noise & distortions 4) to narrow banding the signal 5) to reduce equipment
AM imply amplitude modulation of a carrier signal
The difference between frequency modulation and phase modulation is that with frequency modulation the angular frequency of the signal is modified while with the phase modulation, the phase angle of the signal is modified.
The basic difference is that in analog modulation the modulating signal is analog signal and in digital modulation it is in digital form.
Amplitude of the (high frequency) Carrier signal is varied with respect to low frequency of message signal is called amplitude modulation. Frequency of the carrier signal is varied with respect to low frequency of message signal is called frequency modulation.
amplitude modulation is where we modulate our signal with a carrier signal amplitude changes but frequency remains constant in amplitude modulation
modulating signal is the message to be carried by the carrier signal.
Data modulation is a method of Electronic packing of data. In Data communication data is transmitted through a process which is called "Data Modulation".
Modulation is the addition of information to an electronic or optical signal carrier. The modulation can be applied by turning the signal on and off.
Frequency modulation differs from amplitude modulation. FM coverage distance is less with more clarity due to non interference with carrier waves.
To overcome the limitations of delta modulation, such as slope overload and granular noise, one can implement adaptive delta modulation (ADM), which adjusts the step size based on the signal's characteristics. Additionally, using predictive coding techniques can enhance performance by anticipating changes in the signal and optimizing the modulation process. Employing filters to smooth the output can also help reduce noise and improve the overall quality of the signal reconstruction.
The depth of modulation index refers to the extent to which a carrier signal is varied by a modulating signal in amplitude modulation (AM). It is typically expressed as a percentage and indicates how much the amplitude of the carrier wave changes in response to the modulating signal. A modulation index of 100% means full modulation, where the carrier's amplitude varies completely with the modulating signal. Values above 100% can lead to distortion and over-modulation, impacting the quality of the transmitted signal.