Time diversity is used in digital communication systems to combat that the transmissions channel may suffer from

error burst In telecommunication, a burst error or error burst is a contiguous sequence of symbols, received over a communication channel, such that the first and last symbols are in error and there exists no contiguous subsequence of ''m'' correctly receive ...

s due to time-varying channel conditions. The error bursts may be caused by

fading In wireless communications, fading is variation of the attenuation of a signal with various variables. These variables include time, geographical position, and radio frequency. Fading is often modeled as a random process. A fading channel is ...

in combination with a moving receiver, transmitter or obstacle, or by intermittent electromagnetic interference, for example from

crosstalk In electronics, crosstalk is any phenomenon by which a signal transmitted on one circuit or channel of a transmission system creates an undesired effect in another circuit or channel. Crosstalk is usually caused by undesired capacitive, i ...

in a cable, or

co-channel interference Co-channel interference or CCI is crosstalk from two different radio transmitters using the same channel. Co-channel interference can be caused by many factors from weather conditions to administrative and design issues. Co-channel interferen ...

from radio transmitters. Time diversity implies that the same data is transmitted multiple times, or a redundant

error correcting code In computing, telecommunication, information theory, and coding theory, an error correction code, sometimes error correcting code, (ECC) is used for controlling errors in data over unreliable or noisy communication channels. The central idea is ...

is added. By means of bit-interleaving, the error bursts may be spread in time.

See also