| 摘要 |
In a beamforming system and method, a technique to remove the group delay effects described above by processing the transmit weights to compensate for any group delay caused by receive synchronization in the receive device. At a first communication device on the link, transmit weights are computed from signals transmitted by a second communication device and received at a plurality of antennas of the first communication device. The transmit weights are processed to compensate for group delay that may be introduced by receive synchronization performed by the first communication device. The transmit weights are then applied to a transmit signal to produce a plurality of transmit signals to be simultaneously transmitted from corresponding ones of the plurality of antennas of the first communication device to the second communication device. The further processing of the transmit weights to compensate for group delay involves normalizing the transmit weight vector with respect to an element of the transmit weight vector associated with one of the plurality of antennas. A similar technique is employed at the second communication device when it receives signals from the first communication device. These group delay compensation techniques may be extended to a vector beamforming system in which a plurality of eigenmodes are simultaneously transmitted between the two devices.
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