Title :
Combined decoding and channel estimation of OFDM systems in mobile radio networks
Author_Institution :
Inst. of Network & Signal Technol., Darmstadt Univ. of Technol., Germany
Abstract :
An improved method to estimate the channel transfer function of a multi-carrier system (OFDM) is presented. The basic idea is to utilize the (soft) results of a decoding process to estimate and predict the channel coefficients of a frequency selective fading channel. The symbolwise soft-output of the decoder is treated as a reliability of the decoder decision. Using this reliability as a measure it is possible to update the channel estimation by the most reliable decoder decisions
Keywords :
decoding; fading; frequency division multiplexing; land mobile radio; parameter estimation; radio networks; time-varying channels; transfer functions; OFDM systems; channel coefficients; channel estimation; channel transfer function; decoder decision reliability; decoding; frequency selective fading channel; mobile radio networks; multicarrier system; reliability measure; symbolwise soft-output; time variant frequency selective channel; Channel estimation; Convolutional codes; Decoding; Discrete Fourier transforms; Frequency estimation; Intelligent networks; Intersymbol interference; Land mobile radio; OFDM; Telephony;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.605828
