Estimation of Rayleigh fading channels using time multiplexed pilot symbols in W CDMA (FDD) is considered. Method of interpolation on a second order curve using the instantaneous channel estimation of two contiguous...Estimation of Rayleigh fading channels using time multiplexed pilot symbols in W CDMA (FDD) is considered. Method of interpolation on a second order curve using the instantaneous channel estimation of two contiguous slots based on least square method (SOLSM) is presented. It is demonstrated by computer simulations that the channel distortion on data symbols in a slot can be estimated effectively compared to the method using simple linear interpolation, and the performance of the Rake combiner is improved effectively especially in fast moving cases.展开更多
Turbo code has drawn more and more attractions for high data rate transmission these years especially in W CDMA and CDMA2000 of the third generation mobile communications systems. In this paper, the simulation perfor...Turbo code has drawn more and more attractions for high data rate transmission these years especially in W CDMA and CDMA2000 of the third generation mobile communications systems. In this paper, the simulation performance of turbo code under Rayleigh fading channel and additive white Gaussian channels are depicted. Comparison with the performance of convolutional code are made respect to different parameters, such as pilot length, interleaver size, frame length, mobile velocity and data rate, etc. Faithful results are drawn out.展开更多
文摘Estimation of Rayleigh fading channels using time multiplexed pilot symbols in W CDMA (FDD) is considered. Method of interpolation on a second order curve using the instantaneous channel estimation of two contiguous slots based on least square method (SOLSM) is presented. It is demonstrated by computer simulations that the channel distortion on data symbols in a slot can be estimated effectively compared to the method using simple linear interpolation, and the performance of the Rake combiner is improved effectively especially in fast moving cases.
文摘Turbo code has drawn more and more attractions for high data rate transmission these years especially in W CDMA and CDMA2000 of the third generation mobile communications systems. In this paper, the simulation performance of turbo code under Rayleigh fading channel and additive white Gaussian channels are depicted. Comparison with the performance of convolutional code are made respect to different parameters, such as pilot length, interleaver size, frame length, mobile velocity and data rate, etc. Faithful results are drawn out.
