Patent ID: 8737246
Filing Date: 2014-05-27
Classification: H04B,H04L,H04W

Abstract:
1. A radio transmission apparatus for transmitting a plurality of spatial multiplexing streams to a radio reception apparatus, the radio transmission apparatus comprising: a determining section configured to determine the number of spatial multiplexing streams based on a desired number of multiple paths and the number of receiving antenna ports of the radio reception apparatus, the number of spatial multiplexing streams being a product of the desired number of multiple paths and the number of receiving antenna ports, the desired number of multiple paths being a number of multiple paths by which a received power of each of the plurality of streams satisfies a desired error rate of the plurality of streams in a fixed modulation scheme; a dividing section configured to divide transmission data into the determined number of spatial multiplexing streams; a calculating section configured to calculate transmission weights based on the desired number of multiple paths, the determined number of spatial multiplexing streams and a channel estimation value; and a precoding section configured to perform a precoding on the determined number of streams using the calculated transmission weights.