Patent ID: 8126393

Claim:
A gain adjustment method for a multiple input multiple output (MIMO) wireless communication system, the MIMO wireless communication system comprising a plurality of source antennas, a plurality of destination antennas, a first relay station (RS) and a relay transmission power limit value, the first RS having a first gain value, the gain adjustment method comprising the steps of: receiving a plurality of first channel data and a plurality of second channel data, wherein the plurality of the first channel data are related to connection situations of a plurality of channels between the source antennas and the first RS, and the plurality of the second channel data are related to connection situations of a plurality of channels between the first RS and the destination antennas; selecting a first predetermined value according to the relay transmission power limit value, the plurality of the first channel data and the plurality of the second channel data; replacing the first gain value of the first RS with the first predetermined value; calculating a first system capacity of the MIMO wireless communication system according to the plurality of the first channel data, the plurality of the second channel data and the first predetermined value; setting a second gain value according to the first system capacity; and replacing the first gain value of the first RS with the second gain value.