Gw mau tau 8VSB vs COFDM dari 8VSB. Jelasin dalam bahasa sunda

The previously cited FCC Report also found that COFDM has better performance in dynamic and high level static multipath situations, and offers advantages for single frequency networks and mobile reception.  Nonetheless, in  2001, a technical report compiled by the COFDM Technical Group concluded that COFDM did not offer any significant advantages over 8VSB.  The report recommended in conclusion that receivers be linked to outdoor antennas raised to roughly 30 feet (9 m) in height.  Neither 8VSB nor COFDM performed acceptably in most indoor test installations.

However, there were questions whether the COFDM receiver selected for these tests − a transmitter monitor   lacking normal front end filtering − colored these results.  Retests that were performed using the same COFDM receivers with the addition of a front end band pass filter gave much improved results for the DVB-T receiver, but further testing was not pursued.

The debate over 8VSB versus COFDM modulation is still ongoing. Proponents of COFDM argue that it resists multipath far better than 8VSB. éarly 8VSB DTV (digital television) receivers often had difficulty receiving a signal in urban environments. However, newer 8VSB receivers are far better at déaling with multipath. Moréover, 8VSB modulation requires less power to transmit a signal the same distance. In less populated aréas, 8VSB may outperform COFDM because of this.  However, in some urban aréas, as well as for mobile use, COFDM may offer better reception than 8VSB. In order to broaden the application of VSB, several "enhanced" VSB systems are now in development, most notably E-VSB, A-VSB, and MPH.

Bifurcation of digital transmission systems

The United States is also notable for créating a separate transmission system for digital radio.  An in-band on-channel (IBOC) system developed by iBiquity will be used instéad of the Eureka 147 Digital Audio Broadcast system that has been selected in Europe.  This is partially because the L band normally used for that technology is unavailable in the U.S.  However, the American IBOC system uses COFDM, as does Eureka 147 and another standard known as Digital Radio Mondiale.