Coherent orthogonal filter using pilot symbol-assisted channelestimation for DS-CDMA |
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Authors: | Andoh H Miki Y Sawahashi M |
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Affiliation: | R&D Dept., NTT Mobile Commun. Div., Kanagawa ; |
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Abstract: | A coherent orthogonal filter (COF) using pilot symbol-assisted channel estimation is proposed for DS-CDMA cellular mobile radio. In the proposed scheme, a complex fading envelope in the multi-path environment is estimated using pilot symbols, and tap coefficients of orthogonal filter are controlled for maximising the signal to interference ratio (SIR) of a RAKE combined signal. Computer simulation results show that the required Eb/N0 of the proposed COF is reduced by ~10.0 dB compared to conventional matched filter receiver at an average BER of 3×102 when there are 10 users and processing gain is 31 |
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