Multi-cell channel estimation method based on elimination of serial interference

Abstract

This invention relates to one multiple area signal estimation method based on series interference elimination, which adopts series interference method to remove interference, which comprises steps of interference reconstruction, signal correlating, effect path testing, signal reconstruction and interference removing. This invention method can effectively overcome receive environment interference to improve signal channel decline of accuracy to improve system property.

Description

technical field [0001] The invention relates to a multi-cell channel estimation method based on serial interference elimination in a Time Division Synchronous Code Division Multiple Access Communication (TD-SCDMA) system. Specifically, it relates to a multi-cell channel estimation method based on serial interference cancellation in the same-frequency receiving environment. Background technique [0002] In the receiving device of Time Division Synchronous Code Division Multiple Access (TD-SCDMA), in order to obtain good receiving effect, it is necessary to obtain accurate channel estimation of the training sequence. Since the receiving device is in the process of continuous movement, the wireless channel conditions are constantly changing, and it is necessary for the channel estimation to accurately reflect the signal changes. Both the receiving system and the timing tracking system need a high-performance channel estimation method to accurately detect channel changes to mee...

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Problems solved by technology

[0003] In the same-frequency environment, since there is fixed same-frequency signal interference in different code channels of the training sequence, the interference of this fixed mode will be related to the time delay of the cell and the synchronization codeword used. If the signal channel of the cell is estimated Unable to accurately identify this co-channel interference will cause serious interference to the channel estimation of the system leading to the synchronous system, and even cause communication failure

[0004] Therefore, in the same frequency environment, since the receiving system is often in relatively serious fixed interference, in the wireless environment, especially in the fading environment, the receiver timing will face serious problems, so it is necessary to control the receiving timing system reasonably. To prevent the timing system from malfunctioning or even connection failure caused by serious signal fading

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