Signal processing method and apparatus suitable for high-speed moving environment

Abstract

The invention provides a signal processing method which can be applied in a high speed mobile environment; the method is provided with a high speed threshold and comprises the following steps: A. the doppler shift of a mobile terminal in time slots is obtained and whether the doppler shift which is equal to or more than the high speed threshold exists is judged, and if the doppler shift which is equal to or more than the high speed threshold exists, the step B is implemented, and if the doppler shift which is equal to or more than the high speed threshold does not exist, the present treatmentprocess is ended; B. received signals in the time slots are corrected. Besides, the invention also provides a signal processing device which can be applied to the high speed mobile environment. The application of the method and the device provided by the invention can reduce or eliminate the influences on the performance of channel links by the high speed movement, which further achieves the purpose that a TD-SCDMA system can normally provide the mobile service for the mobile terminal in the high speed mobile wireless environment, therefore, a TD-SCDMA system can be applied to the high speed mobile wireless environments such as the magnetic suspension or high speed railways, etc.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a signal processing method and device suitable for high-speed mobile wireless environment. Background technique [0002] The existing Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system can provide reliable mobile services to mobile users at conventional speeds. But when the speed is high, such as maglev or high-speed railway, the uplink channel changes very quickly due to the high-speed movement of the mobile terminal, so the channel estimate obtained according to the midamble code in a time slot is two times the same as the time slot. In some extreme cases, the two are almost irrelevant. In the prior art, the base station usually performs the demodulation operation of the uplink signal according to the estimated channel value obtained by midamble estimation. Therefore, since the channel estimation value cannot reflect the real channels at both ends of t...

AI Technical Summary

Problems solved by technology

Therefore, since the channel estimation value cannot reflect the real channels at both ends of the time slot, the uplink time slot cannot be demodulated correctly, for example, the call quality will be degraded or even dropped.

Therefore, the mobile communication system cannot provide mobile services to mobile users in a high-speed environment

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