The SSB and DSB-SC spectra look correct to me. I wasn't too familiar with VSB, but a quick google led to these lecture notes from Stanford (here). There is an image (shown below) in the notes which supports your understanding of VSB, so I think you are correct.Fatima Hasan said:
AM modulation, or amplitude modulation, is a method of transmitting information through a radio wave by varying the amplitude, or strength, of the wave. This is achieved by combining the original signal with a carrier wave at a higher frequency. The resulting wave will have a varying amplitude that corresponds to the original signal, allowing the information to be transmitted.
One of the main advantages of AM modulation is its simplicity. It is relatively easy to implement and requires less complex equipment compared to other modulation techniques. AM also has a wider range of frequencies that can be used for transmission, making it suitable for long-distance communication.
One major disadvantage of AM modulation is its susceptibility to noise and interference. Since the information is encoded in the amplitude of the wave, any changes to the amplitude can distort the signal and make it difficult to decipher. AM also has a limited bandwidth, which means it can only transmit a certain amount of information at a time.
AM modulation is used in various applications, including commercial and amateur radio, television broadcasting, and aviation communication. It is also used in many consumer devices such as AM radios and walkie-talkies.
Yes, there are several techniques that have been developed to improve upon the limitations of AM modulation. These include double-sideband suppressed carrier (DSB-SC) modulation, single-sideband (SSB) modulation, and quadrature amplitude modulation (QAM). These techniques allow for more efficient use of bandwidth and better resistance to noise and interference.
