Coordinated Multi-Point Transmission

In a multiple-input multiple-output (MIMO) wireless system supporting Coordinated Multi-Point (CoMP) transmission and having a first base station, a second base station, a first user equipment, and a second user equipment, a communications method implemented in the first user equipment, the communications method comprising:

• exchanging, with the second user equipment through local information exchange, first information about a first channel between the first base station and the first user equipment and second information about a second channel between the second base station and the first user equipment;
• and
• computing at least one of a precoding matrix, a receiver filter, and a projection matrix,
• wherein the first user equipment estimates the first information and the second information, and shares the first information and the second information with the first base station and the second base station.

A multiple-input multiple-output (MIMO) wireless system supporting Coordinated Multi-Point (CoMP) transmission, the MIMO wireless system comprising:

• a first base station;
• a second base station;
• and
• a user equipment,
• wherein the first base station exchanges, with the second base station through local information exchange, first information about a first channel between the first base station and the user equipment and second information about a second channel between the second base station and the user equipment,
• wherein the first base station computes at least one of a precoding matrix, a receiver filter, and a projection matrix, and
• wherein the user equipment estimates the first information and the second information, and shares the first information and the second information with the first base station.

A multiple-input multiple-output (MIMO) wireless system supporting Coordinated Multi-Point (CoMP) transmission, the MIMO wireless system comprising:

• a first base station;
• a second base station;
• a first user equipment;
• and
• a second user equipment,
• wherein the first user equipment exchanges, with the second user equipment through local information exchange, first information about a first channel between the first base station and the first user equipment and second information about a second channel between the second base station and the first user equipment,
• wherein the first user equipment computes at least one of a precoding matrix, a receiver filter, and a projection matrix, and
• wherein the first user equipment estimates the first information and the second information, and shares the first information and the second information with the first base station and the second base station.