Descrambling and despreading method for input data on terminal side and system thereof

Abstract

The invention relates to the field of communication and discloses a descrambling and despreading method for input data on the terminal side and a system of the method. When the data rate of antenna data from a cell changes, deviation corresponding to the change of the data rate is performed on a scrambling code sequence of the cell, the input data on the terminal side are descrambled according to the deviated scrambling code sequence of the cell, the descrambled input data on the terminal side are despread, and the despread data are obtained. Compared with the prior art, when multi-path drifting is generated, scrambling code sequences of all cells are independently managed, the risk that antenna data of other irrelevant cells are abandoned or repeated improperly is avoided, self-adaption rate matching is achieved, and the purpose of keeping the data sequence of the descrambled and despread data on the terminal side corresponding to the antenna data of the cells one to one is achieved.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for descrambling and despreading input data at a terminal side. Background technique [0002] For WCDMA terminals of the wideband code division multiple access mobile communication system, descrambling and despreading of L1 are generally implemented by hardware accelerators. The existing hardware accelerator requires an input chip rate of 3.84 megabytes per second. If the input rate of the terminal changes due to movement, etc., it is necessary to perform rate conversion at the front end of the accelerator. cause minor performance issues. [0003] Descrambling and despreading principle of WCDMA: [0004] WCDMA is a spread spectrum system, in which digital signals need to be spread and scrambled at the transmitting end, and descrambled and despread correspondingly at the receiving end. [0005] The principle of spread spectrum scrambling at the transmitter is as fo...

AI Technical Summary

Problems solved by technology

[0023] 1. The rate conversion process is complicated, which will affect the descrambling and despreading accelerator and multipath search module

[0024] 2. The descrambling and despreading accelerator needs to increase the multipath reconfiguration caused by rate conversion, which increases the complexity of hardware configuration

[0025] 3. During soft handover, no matter which cell is used as a reference, there is always the risk that the antenna data of other cells will be inappropriately repeated or discarded, which will bring hidden dangers to performance

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