Adaptive channel estimation with velocity estimator for W-CDMA receiver

Adaptive channel estimation with velocity estimator is proposed for the 3rd generation cellular system called IMT-2000. By using the proposed velocity estimator, we can select the best channel estimation mode depend based on the estimated vehicular speed. The comparison of several channel estimation schemes is studied analytically. Then each channel estimation's capability depend on vehicular speed is cleared. We studied the velocity estimator for channel estimation control. We evaluated the velocity estimator and adaptive channel estimation with velocity estimator under a multi-speed environment. The proposed adaptive channel estimator can accomplish conflicting features, a wide vehicular speed range, low speed to 300 km/h, good SNR performance, and low power consumption for the user equipment.