Method and device for determining window channel impulse response in td-scdma system same-frequency multi-cell

Abstract

The invention discloses a method and device for determining the channel impulse response of a window in multiple cells of the same frequency in a TD-SCDMA system. The method includes: obtaining the channel impulse response of each cell of the same frequency; intercepting the local sequence of each window, and Sliding correlation is performed on the received signal, and according to the relative positional relationship between the position of the maximum correlation value corresponding to each window and the training sequence of the received signal, in the channel impulse response of the corresponding cell, search for the same relative positional relationship with the respective reference points of the corresponding window If the found tap is valid, in the channel impulse response of the cell where each window is located, determine the effective bit of the channel impulse response of the corresponding window, and set the other bits in the effective bit of the channel impulse response of the corresponding window The effective taps of the window are set to zero, and the channel impulse response of the corresponding window is obtained. By adopting the method or device of the embodiment of the present invention, the channel impulse response of the window can be accurately determined even when the window goes out.

Description

technical field [0001] The invention relates to the technical field of mobile communication system detection, in particular to a method and a device for determining window channel impulse response in multiple cells of the same frequency in a TD-SCDMA system. Background technique [0002] For the TD-SCDMA system, according to the definition of the training sequence in the 3GPP standard, different training sequences are used between different cells, and different cyclic shifts of the same base sequence are used between multiple users in the same cell. The receiver implements the same-frequency multi-cell channel estimation algorithm, and can obtain the channel impulse response of multiple cells, and the different windows of the channel impulse response of each cell represent different users in the cell. [0003] Channel estimation includes initial channel estimation and post-processing of channel estimation. The initial channel estimation obtains the initial value of the chan...

AI Technical Summary

Problems solved by technology

This method can only distinguish the time delay relationship between cells, but does not distinguish the time asynchrony between users, so it is only applicable to downlink, not uplink

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