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US 8,620,221 B2Granted
Base station device, terminal device, and wireless communication system
AssigneePanasonic Corporation
InventorsTakaaki Kishigami, Shozo Okasaka
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AssigneePanasonic Corporation
InventorsTakaaki Kishigami, Shozo Okasaka
Estimating the term…
A base station device (10) communicates between a first terminal device and a second terminal device over the same channel by spatial multiplexing. The base station device (10) comprises an interference cancellation coefficient extractor (30) that extracts an interference cancellation coefficient from a signal received from the first terminal device to cancel interference on a propagation channel with the first terminal device in advance, and transmits a pilot signal that contains information related to the interference cancellation coefficient to the second terminal device. In addition, the base station device (10) also comprises an interference canceller (16) that uses the interference cancellation coefficient to cancel an interference component from transmission data to be transmitted over the same channel, and transmits the transmission data from which the interference component has been canceled by the interference canceller (16) to the first terminal device and the second terminal device over the same channel. A wireless communication system is provided which, in a multi-user MIMO, suppresses superimposed interference components resulting from channel fluctuations and channel estimation errors when interference cancellation is performed in advance in a base station unit on a modulated signal to be transmitted.
A base station device that communicates with a first terminal device and a second terminal device over the same channel by spatial multiplexing, the base station device comprising:
A terminal device that communicates with a base station device that performs spatial multiplexing with a plurality of terminal devices, the terminal device comprising:
A wireless communication system comprising a plurality of terminal devices and a base station device that communicates with a first terminal device and a second terminal device among the plurality of terminal devices over the same channel by spatial multiplexing, wherein
A wireless communication method used by a base station device that communicates with a first terminal device and a second terminal device over the same channel by spatial multiplexing, the wireless communication method comprising the steps of:
A base station device that transmits a unicast signal to be transmitted to a first terminal device and a multicast or broadcast signal to be transmitted to a plurality of groups of terminal devices by spatial multiplexing over a same channel, the base station device comprising:
A wireless communication system comprising a plurality of terminal devices and a base station device that transmits a unicast signal to be transmitted to a first terminal device among the plurality of terminal devices and a multicast or broadcast signal to be transmitted to a plurality of groups of terminal devices by spatial multiplexing over a same channel, wherein
A wireless communication method used by a base station device that transmits a unicast signal to be transmitted to a first terminal device and a multicast or broadcast signal to be transmitted to a plurality of groups of terminal devices by spatial multiplexing over a same channel, the wireless communication method comprising the steps of:
Dependencies are inferred from the claim text.