| 摘要 |
A method and apparatus for estimating channel conditions in a code-division multiple access (CDMA) communication system having a pilot signal and a traffic signal. The apparatus includes a pilot filter for generating channel estimates from the pilot signal and a circuit for reconstructing the traffic information bits after they have been decoded. A predictive channel estimation circuit generates predictive channel estimates from the original traffic signal demodulated by the reconstructed traffic information bits. A demodulator demodulates the traffic signal using the predictive channel estimates and the pilot signal channel estimates. By using the predictive channel estimates that contain signal energy from the traffic signal as a coherent reference, the channel conditions may be estimated more accurately than by using the pilot signal alone.
|
