To provide a communication system which can efficiently improve the throughput of a mobile station apparatus existing in a base station apparatus (especially a mobile station apparatus existing at a cell end) and a communication method, a base station apparatus, and a mobile station apparatus.
A high order layer 101 controls transmission power on the basis of propagation path information and determines whether its transmitted data has interferences suppressed by mutual cooperation between each base station apparatus. A weighting coefficient control unit 105 uses the propagation path information obtained from the high order layer 101 to calculate a transmission weighting coefficient Vj by which signals transmitted by a master base station apparatus and a slave base station apparatus are to be multiplied and a reception weighting coefficient Uk by which reception signals received by mobile station apparatuses connected to each base station apparatus are to be multiplied. In other words, the weighting coefficient control unit 105 uses the propagation path information of the entire system to calculate transmission and reception weighting coefficients. A precoding unit 104 multiplies the modulation symbol output by a modulation unit 103 by a transmission weighting coefficient V1.
YAMADA RYOTA
HIRATA KOZUE
KATO KATSUYA
Masayoshi Kanda
Akio Miyao
Nobuyuki Baba