| 摘要 |
A method, apparatus, and computer program for cognitive radio communications are provided. A reference signal is received from a transmitter of a primary system, and the received reference signal is received with an arbitrarily selected beamforming setting. Then, a signal quality metric is calculated from the received and beamformed reference signal. If the signal quality metric indicates that a reception power of the received signal is low, transmission of a data signal to a wireless communication device of a secondary system is scheduled. In the scheduled transmission in the secondary system, the same beamforming setting as was used in the reception of the reference signal is employed. |
