Patent ID: 8229016

Claim:
A Multi-Input Multi-Output (MIMO) receiving apparatus comprising: a receiving section that receives a degree-of-multiplexing-N spatially multiplexed signal in which mutually different transmission signals are spatially multiplexed via a plurality of propagation paths, where N is a number of the mutually different transmission signals; a first signal demultiplexing section that executes linear computation on the received spatially multiplexed signal and demultiplexes the received spatially multiplexed signal into groups of spatially multiplexed signals, each group comprising a number of the transmission signals smaller than N; a second signal demultiplexing section that demultiplexes the spatially multiplexed signal of each group into each transmission signal contained in the spatially multiplexed signal; a first signal processing section that processes the demultiplexed transmission signals; a replica generation section that generates a replica of each transmission signal after processing by the first signal processing section, multiplies each replica by a propagation path estimate of the transmission signal corresponding to each replica, and generates a reception-time replica of the transmission signal; a subtraction section that subtracts the reception-time replicas corresponding to other transmission signals other than a desired transmission signal from the groups of spatially multiplexed signals demultiplexed by the first signal demultiplexing section to obtain the desired transmission signal; a combining section that performs diversity combining of the desired transmission signal obtained from the spatially multiplexed signal of each propagation path; and a second signal processing section that processes a transmission signal obtained after the diversity combining.