-Carrier not available in receiver
-Envelope detection not possible
The disadvantages of delta modulation are slope overload distortion and granular noise.
The feature of the multiplier module's output that suggests it is essentially a Double Sideband Suppressed Carrier (DSBSC) signal is the absence of a carrier frequency component in the output spectrum. In DSBSC modulation, the carrier wave is suppressed, and the output consists of two sidebands that carry the modulating information. This characteristic can be identified by analyzing the frequency domain representation, where only the upper and lower sidebands are present without the carrier frequency peak.
BW=2 fm
The delta modulation transmits only one bit for one sample. Thus the signaling rate and transmission channel bandwidth is quite small for delta modulation. The transmitter and receiver implementation is very much simple for delta modulation. There is no analog to digital converter involved in delta modulation. The disadvantages of delta modulation are slope overload distortion and granular noise. These are the two drawbacks of delta modulation.
ADVANTAGES OF IDS
Advantages: it improves frequency stability. phase modulation n demodulation is easy as compared to frequency modulation.
There are two major disadvantages of delta modulation: 1. Slope overload distortion: occurs when modulating signal varies faster than counter recovered signal. 2. Granular noise: occurs when variation in modulating signal is smaller than step size.
Draw thewaveform of AM signal and DSBSV
AM - Amplitude Modulation FM - Frequency Modulation
modulation
Frequency Modulation and Phase Modulation
frequency modulation..