Electronics and Telecommunications Research Institute

University-industry Cooperation Group of Kyung Hee University

Heung Yong Kang

Yong-Seok Choi

Chung Sup Kim

Ki Cheol Tae

Kanghee Kim

Young Soo Kim

Sang-Won Kim

Yong Seok Choi

Jae Ick Choi

Sang Won Kim

Haeng Sook Ro

Gwangmoon Park

Mi-Kyung Suk

Soo-Ho Sohn

Kang Hee Kim

Seong Yun Lee

Sang Tae Kim

Seung Min Shin

An apparatus for calculating a reception time of a wireless communication signal is disclosed. The apparatus includes a downconverted signal generator configured to generate a downconverted signal, a baseband signal, by downconverting a frequency of a signal received from a transmission source, a modulated signal generator configured to generate a modulated signal by multiplying the downconverted signal by a randomly generated reference signal, a time difference calculator configured to calculate a time difference between the modulated signal and the reference signal by cross-correlating the modulated signal and the reference signal, and a reception time calculator configured to calculate a reception time of the signal received from the transmission source using a point in time at which the reference signal is generated and the time difference between the modulated signal and the reference signal.

Apparatus and method for calculating reception time of wireless communication signal

Provided herein is a method and apparatus for realizing a frequency-spatial filter with variable bandwidth, the method including generating M number of FFT channel blocks having N number of channels by performing an N point FFT (Fast Fourier Transform) processing using M number of array antenna inputs; combining some of the N number of channels of each FFT channel block according to a frequency bandwidth variable parameter value; combining some of spatial response vector channels in a combined channel of each FFT channel block according to a spatial bandwidth variable parameter value; and combining all the channels and outputting the same.

Method and apparatus for designing frequency-spatial filter with variable bandwidth

An apparatus is used for modulation classification of unknown input signal in a wireless communication system. The apparatus includes a signal classification unit configured to classify the input signal into a PSK signal and an FSK signal and a modulation index decision unit configured to decide a modulation index for the PSK signal and the FSK signal classified by the signal classification unit.

Apparatus and method for modulation classification in wireless communication system

Provided is a method of selecting a white Gaussian noise sub-band using singular value decomposition (SVD). The method includes selecting a first frequency band, verifying whether a signal is included in the selected first frequency band, determining the first frequency band as a target measurement frequency when the signal is not included in the selected first frequency band, and measuring a background radio noise in the determined target measurement frequency.

System and method of selecting white gaussian noise sub-band using singular value decomposition

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Daejeon, South Korea

Heung Yong Kang