TDD developers maintain that this reduces the complexity of the system. TDD requires a minimum of one channel of available spectrum. FDD systems require tracking of matched pairs and cannot offer complete coverage with a single radio. The need for radio matching decreases flexibility in large-scale efforts such as local multipoint distribution service. In addition, TDD allows the use of contiguous or noncontiguous spectral blocks-an advantage over FDD systems.
Proponents often herald the technology s ability to offer bandwidth on demand.
With TDD, there is no need to overallocate bandwidth. This allows maximum use of the frequency. Also, TDD enables symmetrical and asymmetrical communications. In a symmetrical format, uplinks and downlinks are equal, while asymmetrical transmissions have varying uplink and downlink traffic, which can be enhanced by dynamically allocated bandwidth to support needs at any given time. Wavtrace Incorporated is one company whose founding was based on the TDD technology.