Channel sounding and channel estimation strategies in MIMO systems

摘要

A first communication device comprising a first plurality of radio frequency (RF) chains coupled to the first plurality of antennas; and a second comprising a second plurality of RF chains coupled to the second plurality of antennas. In a system having two communication devices, the second communication device is a plurality of consecutive training packets transmitted by the first communication device and applying power level rules to the first plurality of RF chains To receive a plurality of consecutive training packets generated at the first communication device. The second communication device determines each channel measurement corresponding to a plurality of consecutive training packets based on the power level rule and selects a transmission parameter based on each channel measurement. The transmission parameter is used by the first communication device when transmitting to the second communication device. The second communication device transmits an indication of the selected transmission parameter to the first communication device.