Channel prediction to combat channel-aging with low complexity

A communication device comprising:

• a wireless transceiver configured to communicate with another communication device through a wireless channel;
• and
• at least one processor configured to execute instructions to:
• a) estimate at least two channel response matrices of the wireless channel based on a predetermined signal received from the another communication device;
• b.1) transform the at least two channel response matrices by at least one first transformation from antenna-frequency domain to beamspace-delay domain, to generate at least two intermediate channel response matrices;
• b.2) obtain at least two first intermediate eigenvectors or singular vectors of the at least two intermediate channel response matrices;
• c.1) predict at least one second intermediate eigenvectors or singular vector by the predetermined prediction method using the at least two first intermediate eigenvectors or singular vectors;
• and
• c.2) transform the at least one second intermediate eigenvectors or singular vector by at least one second transformation from the beamspace-delay domain to antenna-frequency domain, to generate the at least one second eigenvector or singular vector.

A channel prediction method by at least one processor in a communication device including a wireless transceiver, wherein the wireless transceiver is configured to communicate with another communication device through a wireless channel, the method comprising:

• a) estimating at least two channel response matrices of the wireless channel based on a predetermined signal received from the another communication device;
• b) obtaining at least two first eigenvectors or singular vectors from the at least two channel response matrices;
• and
• c) predicting at least one second eigenvector or singular vector based on the at least two first eigenvectors or singular vectors by a predetermined prediction method, wherein the at least one second eigenvector or singular vector is used to perform signal transmission to the another communication device at a time instant where no channel estimation is performed.