Cyclic Delay Diversity is a spatial diversity scheme used in wireless communications, particularly OFDM systems. It transmits the same signal from multiple antennas but applies a different cyclic shift or delay to each. This artificially creates frequency selectivity in the channel, helping the receiver combine the multipath signals to improve link reliability without requiring complex space-time coding.
Heard on the job
We need to enable CDD on the access point to improve the throughput at the cell edge.
Insider tip
Engineers often pair CDD with spatial multiplexing to maximize throughput in high-interference environments.