Summary
International Symposium on Antennas and Propagation
2012
Session Number:2B2
Session:
Number:2B2-5
A New Eigenvector Beam-forming Method without First Eigenvector for Reducing Interference inside Relay Station
Takaaki Shirai, Kentaro Nishimori, Kota Shishido, Naoki Honma, Hideo Makino,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
In recent wireless communications, communication with wider service area and high data rate is required by the spread of mobile phones and wireless LAN systems. From the viewpoint of decreasing the transmission power and expanding the service area, relay stations are investigated regardless of mobile and fixed wireless communications. Decode-and-Forward (DF) scheme, which uses two time slots for one transmission, is generally adopted when considering the relay station. However, frequency/time resource becomes half when DF is used. Therefore, simultaneous transmission and reception at the relay station is ideal. However, interference with a extremely higher power than a desired signal arrives at the receiver at the relay station when the simultaneous transmission and reception is employed inside the relay station. As a basic study in this paper, we propose and evaluate the interference cancellation method inside relay station by a signal processing technique. A new eigenvector beam-forming method without first eigenvector for efficiently reducing interference is proposed. In the proposed method, propagation characteristics of Short-Range MIMO are utilized. In this paper, a basic idea of the proposed method is described and the effectiveness of the proposed method is shown by numerical calculations.