Advantages disadvantages applications of various modulation schemes 1 DSB SC 2 SSB SC 3 VSB SC 4 items 1 3 with carrier 5 8 16 level VSB SC 6 FM 7 PM 8 PSK 9 ASK 10 M ary PSK Advantages Lower power consumption The modulation system is simple Better management of the frequency spectrum Low power consumption It is a compromise between DSB and SSB Therefore it is easier to generate than SSB SC Envelope detection is possible Increased immunity to noise Increased immunity to noise Power efficiency System is the simplest Bandwidth efficiency Require more bandwidth 11 QAM An attractive alternative to SSB SC Sharp cutoff band pass filters are not required 12 SHD AM FM RECEIVERS Increased selectivity against adjacent channels Power efficiency Error detection and correction capability Zero PSD at f 0 Transmits more bits in a symbol time 13 LINE CODES 14 M ary PAM Disadvantages Complex detection Applications Analog TV systems to transmit color information The generation of exact SSB is rather difficult Complex detection Demodulation system is still complex Its bandwidth is about 25 greater than SSB SC Low power efficiency Two way radio Frequency division multiplexing Require a larger bandwidth more complex receiving hardware Low bandwidth efficiency Analog TV broadcast systems Wireless broadcasting systems ATSC digital television standard Radio broadcasting direct satellite broadcasting data communications systems Low speed communication Low power efficiency Transmitted power is lower V 32 Telephone data fax modems Satellite transmission of DTVB programs Used in cable communication for Compared with SSB QAM is more exacting in terms of the the transmission of DTV and carrier frequency and phase or internet traffic between cable modem and modem termination the requirement for a systems distortion less transmission medium Radio broadcasting Interference from signal frequencies close to the intermediate frequency Transmit only one bit of Optical communications information over the interval of Tb second Require more power M2 less system complexity High rate data links M S Richer et al The ATSC digital television system proc IEEE vol 94 pp 37 43 Jan 2006 www atsc org AM ASK ATSC DSB DTV FM PAM PM PSK QAM SC SHD SSB VSB Amplitude modulation Amplitude shift keying Advanced Television Systems Committee Double sideband Digital television Frequency modulation Pulse amplitude modulation Phase modulation Phase shift keying Quadrature amplitude modulation Suppressed carrier Superheterodyne Single sideband Vestigial sideband