Gain adjustment apparatus, method, and tangible machine-readable medium thereof for a multiple input multiple output wireless communication system

A gain adjustment apparatus for an MIMO wireless communication system, the MIMO wireless communication system comprising a plurality of source antennas, a plurality of destination antennas, a first RS and a relay transmission power limit value, the first RS having a first gain value, the gain adjustment apparatus comprising:

• at least one antenna being configured to receive 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;
• a processing module being configured to select 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, and to replace the first gain value of the first RS with the first predetermined value;
• a calculation module being configured to calculate 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;
• a gain generating module being configured to set a second gain value according to the first system capacity;
• and
• an adjustment module being configured to replace the first gain value of the first RS with the second gain value.

A tangible machine-readable medium storing a program of a gain adjustment method for an MIMO wireless communication system, the MIMO wireless communication system comprising a plurality of source antennas, a plurality of destination antennas, a first RS and a relay transmission power limit value, the first RS having a first gain value, the program comprising:

• a code A for at least one antenna to receive 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;
• a code B for a processing module to select 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;
• a code C for replacing the first gain value of the first RS with the first predetermined value;
• a code D for a calculation module to calculate 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;
• a code E for a gain generating module to set a second gain value according to the first system capacity;
• and
• a code F for an adjustment module to replace the first gain value of the first RS with the second gain value.