method and device for estimating the optimum weight of a transmit diversity with closed loop circuit in a mobile application

摘要

An optimum weight estimating apparatus and method of a mobile station is provided for a mobile communication system in which a base station uses closed transmit diversity technology. Conventionally, all weight vectors stored in a lookup table should be applied to an optimum weight estimator to calculate receiving power, so that the amount of calculation considerably increases when there are many antennas. To overcome this problem, the weights of the lookup table are appropriately adjusted so that the variation of the differences between two adjacent vectors can be minimized. An optimum weight is obtained using the difference vector between weight vectors, thereby simplifying the calculation of receiving power. Therefore, the power loss of the mobile station can be minimized. IMAGE