H.Y. Wu, Multiuser Detection and Channel Estimation for Flat Rayleigh Fading CDMA Channels, Ph.D. Thesis, North Carolina State University, Raleigh, North Carolina, August 1996. Home/Search Document Details and Download
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Multiuser Detection and Channel Estimation for Flat Rayleigh.. - Wu, Duel-Hallen (1 citation) (Correct)
....uses the outputs of the matched filter bank to reconstruct the MAI for all users in a parallel fashion and therefore does not require ordering of users as in the DF and the SIC. With the definition R = I L (I is NxN identity matrix) the signal after MAI cancellation in the PIC is given by [26] y(k) R y(k) RW(k)b(k) n(k) 4) where R = I L , R = R R, and n(k) R n(k) The matrix filter R is the first order approximation of R 1 = I L L 2 L 3 . 7] III. Channel Estimation Several of the multiuser detectors considered in Section II require fading ....
....realistic fading channel, the spectral peak frequency used in the AR2 signal model should be compensated by a factor of 2 relative to the Doppler frequency. We justify the factor of 2 compensation by comparing the autocorrelation functions of a Rayleigh fading channel and a second order AR process [15, 26]. Let C (k) be a discrete time sequence generated by the AR2 process (19) The autocorrelation function of the AR2 process is defined by F(m) E C (k) C (k m) Since the variance of the actual channel coefficient is one, we define F(0) 1. From (19) F(1) a 1 1 a 2 , and the ....
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H.Y. Wu, Multiuser Detection and Channel Estimation for Flat Rayleigh Fading CDMA Channels, Ph.D. Thesis, North Carolina State University, Raleigh, North Carolina, August 1996.
Performance Comparison of Multiuser Detectors with Channel.. - Wu, Duel-Hallen Self-citation (Duel-hallen) (Correct)
....From (24 27) the estimation process is coupled with the decision making process, i.e. H(k) should be replaced by H(k) E b b(k) 1 0 [ T in the decision directed mode. The effect of the decision directed mode of operation on the system design and performance is discussed in [17][23]. In this paper, we study the performance of multiuser detectors using the channel estimate predicted by Kalman filters under the assumption that the decisions are correct. B. Theoretical Bounds for Channel Mismatch The exact closed form theoretical BER expression for the decorrelator with ....
....their performance whereas the decorrelator tends to the single user bound in this case. Issues regarding to the use of the Kalman filter in the decision directed mode (no assumption of correct decisions) and the evaluation of the actual performance of these multiuser detectors are addressed in [17, 23]. Future work will concentrate on performance evaluation of multiuser detectors for a more realistic fading channel model, such as the Jakes model, and for the frequency selective fading CDMA channels. Support This work was supported by the IBM Fellowship, the Center for Advanced Computing ....
H.Y. Wu, A. Duel-Hallen, "Multiuser Detection and Channel Estimation for Flat Rayleigh Fading CDMA Channels with Differentially Encoded Data," in preparation.
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