APPARATUS AND METHOD FOR ESTIMATING DOPPLER SPREAD IN WIRELESS COMMUNICATION SYSTEM

An apparatus and a method for estimating Doppler spread in a wireless communication system are provided to improve performance of a system and to estimate the Doppler spread using a power spectrum of the channel in an OFDM based wireless mobile communication system. An impulse response of a channel...

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Bibliographic Details
Main Authors YEO, SOO BOK, KIM, IN HYOUNG, KIL, KI HO, SHIN, YONG WON
Format Patent
LanguageEnglish
Published 03.08.2009
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:An apparatus and a method for estimating Doppler spread in a wireless communication system are provided to improve performance of a system and to estimate the Doppler spread using a power spectrum of the channel in an OFDM based wireless mobile communication system. An impulse response of a channel is obtained by an IFFT(Inverse Fast Fourier Transform) of a channel value of a frequency domain(903). An effective channel value is sampled by searching for the multi paths from the impulse response(907). A power spectrum of the channel is calculated by an FFT(Fast Fourier Transform) of the effective channel value about the predetermined number of the frame(911). A frequency index with the maximum value is detected from the calculated power spectrum of the channel(913). The maximum Doppler frequency is calculated by obtaining the frequency bin in a position with the maximum value from the calculated power spectrum(923).
Bibliography:Application Number: KR20080008907