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US 2004/0171398 A1Published application
Channel estimation method for a mobile communication system
AssigneeHitachi, Ltd.
InventorsSeishi Hanaoka, Takashi Yano
Life of this patent
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AssigneeHitachi, Ltd.
InventorsSeishi Hanaoka, Takashi Yano
Estimating the term…
Under present circumstances, where an increasing number of wireless communication systems employ the QAM method as a modulation method for frequency use efficiency enhancement as the speed of information transmission in the wireless communication systems increases, it is an object of the present invention to provide a channel estimation method for estimating a channel efficiently and accurately and establishing communication at high quality, that is, providing communication with excellent error rate characteristics. To achieve the above object, the present invention improves characteristics by calculating the channel estimation results variously for all data signal symbols and using them for demodulation. To accomplish the object, the present invention also pays attention to the frequency characteristics of fading in a radio propagation path and enhances the accuracy in channel estimation result calculation by using a band pass filter for eliminating the thermal noise that would increase the estimation error.
A channel estimation method which a receiving apparatus in a mobile communication system uses to obtain a channel estimation result for use in the detection of a data signal received from a transmitting apparatus, wherein said receiving apparatus receives a data signal containing a plurality of data symbols from said transmitting apparatus, estimates a data signal channel condition for each data symbol of said received data signal, and detects said received data signal for each of said data symbol in accordance with the estimation result.
A receiving apparatus in a mobile communication system, comprising:
Dependencies are inferred from the claim text.