Patent ID: 7590200

Claim:
A receiver in a radio communication system transmitting MIMO channel signals, comprising: a plurality of received signal replica generators configured to generate received signal replicas based on previously obtained provisional channel estimation values and transmission signal estimation values; a single canceller configured to remove, from a received signal, the received signal replicas of at least a part of streams which streams are not channel estimation target streams; a single first selector connected to the canceller and configured to receive a selection control signal; and a plurality of channel estimation value generators configured to generate channel estimation values by a filter using outputs from the canceller and the transmission signal estimation values, each of the plurality of channel estimation value generators internally including an adder connected to the canceller, and a second selector connected to a corresponding received signal replica generator and the adder, each of the second selectors configured to receive the selection control signal, wherein the received signal replica generators, the first selector and the canceller are external to each of the plurality of channel estimation value generators.