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Characterization of Wireless Feedback Interference Channels of a Wireless Repeater Using Sounding Measurements  

Moon, Woo-Sik (School of Electronic Engineering, Soongsil University)
Im, Sung-Bin (School of Electronic Engineering, Soongsil University)
Kim, Hyun-Chae (SOLiD TECHNOLOGIES, INC.)
Kwon, Nag-Won (SOLiD TECHNOLOGIES, INC.)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.46, no.1, 2009 , pp. 40-47 More about this Journal
Abstract
This paper presents the method of measuring the feedback interference channel, which is developed between the transmit and receive antennas of a wireless repeater by receiving the transmit signal at the receive antenna of the identical repeater, and experiment results obtained by analyzing the measurements. This experiment uses 2 GHz WCDMA signal and is carried out near a highway. The high-speed mobiles on highways cause reflected signals with high Doppler frequencies and large energy. In order to characterize the feedback channel, the power delay profile and the scattering function are estimated by identifying the delay spread, the Doppler spread, the number of fingers, and the attenuation with delay. Since the feedback interference channel is constructed between the fixed TX and RX antennas, which is dependent upon the multipaths developed by moving or fixed objects around the antennas, the channel shows different properties comparing to the conventional channels between the base station and the mobile station. Therefore, the results presented in the paper are expected to provide guidelines for designing and evaluating wireless repeater systems.
Keywords
채널특성;전력지연프로파일;산란함수;지연확산;도플러확산;
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