Relay node and relay method

Details Relay node and relay method Relay node and relay method

2007-08-24

2010-12-14

Ly, Anh-Vu (Department: 2472)

Multiplex communications

Communication over free space

Repeater

Reexamination Certificate

active

07852798

ABSTRACT:
To improve the channel capacity of an entire communication system in accordance with transmission quality of the channels of each node. A relay node has: a receiving section that receives a received signal from a source node; a channel estimation section that measures SNR of a backward channel between the source node and the relay node, and SNR of a forward channel between the relay node and a destination node; a relay selecting section that selects, from among a QR-P-ZF method, a QR-P-QR method and a ZF-P-QR method, a relay method of the relay node in accordance with the ratio between the SNRs of the backward and forward channels; a relay signal processing section that multiplies the received signal by a transmission weight matrix corresponding to the selected relay method, and thereby converts the received signal to a relay signal; and a transmitting section that transmits the relay signal to the destination node.

REFERENCES:
patent: 2007/0190934 (2007-08-01), Kim et al.
patent: 2009/0161605 (2009-06-01), Shen et al.
patent: 2009/0161641 (2009-06-01), Kim
patent: 2006-148867 (2006-06-01), None
patent: 2006-148868 (2006-06-01), None
Hui Shi, et al., “A Relaying Scheme using QR Decomposition with Phase Control for MIMO Wireless Networks,” Proceedings IEEE International Conference on Communications, Seoul, May 2005, pp. 2705-2711.
Hui Shi, et al., “Relay Techniques in MIMO Wireless Networks,” Proceedings IEEE Vehicular Technology Conference, Sep. 2005, pp. 2438-2443.
Tetsushi Abe, et al; “A Relaying Scheme for MIMO Wireless Networks with Multiple Source and Destination Pairs”, Asia-Pacific Conference on Communications, IEEE, Oct. 3, 2005, pp. 77-81.

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