MIMO TRANSMISSION WITH EXPLICIT AND IMPLICIT CYCLIC DELAYS

摘要

Techniques for transmitting data using a combination of explicit cyclic d elay and implicit cyclic delay are described. A transmitter may perform fir& lt;=t processing for cyclic delay diversity (or explicit cyclic delay proces sing) based on a first set of cyclic delay values known to a receiver. The t ransmitter may perform precoding based on a precoding matrix either before o r after the explicit cyclic delay processing. The transmitter may perform se cond processing for cyclic delay diversity (or implicit cyclic delay process ing) based on a.second set of cyclic delay values unknown to the receiver. T he transmitter may perform both explicit and implicit cyclic delay processin g for data and may perform only implicit cyclic delay processing for pilot. One entity may. select the first set of cyclic delay values and inform the o ther entity. The transmitter may autonomously (e.g. pseudo-randomly) select the second set of cyclic delay, values without informing the receiver.