A fast code disturbance generator and realizing method thereof

Abstract

A quick generator of scramble code consists of counter for generating low order counting value, counter for generating high order counting value and at least two sets of displacement registers for quickly converting code number of scramble code to be initial phase of scramble code and for quickly converting initial phase of scramble code to be code word of scramble code at any phase. The method ofgenerating scramble code by utilizing said generator is also disclosed.

Description

technical field [0001] The invention belongs to the technical field of scrambling code generators, in particular to a fast scrambling code generator and its realization method. technical background [0002] In WCDMA mobile communication, the scrambling code generator is one of the most basic theoretical foundations. The scrambling code generator will be used in the uplink and downlink generation and reception of WCDMA. The so-called scrambling code generator is actually a pseudo-random sequence generator implemented by a shift register. The pseudo-random sequence has a series of algorithm operations such as good autocorrelation and cross-correlation. [0003] In the prior art, the 3G TS 25.213V3.4.0 distribution and modulation (Spreading and modulation) technology proposes a generation method of downlink scrambling codes, and the existing downlink scrambling code generation methods are as follows: [0004] There are 2 downlink scrambling codes 18 -1=262,143 scrambling code...

AI Technical Summary

Problems solved by technology

[0020] Although the prior art provides a specific method for generating scrambling codes, in the implementation process, it is often encountered that it is necessary to generate codewords with any code number and any phase in a short period of time. This method is used to generate The scrambling code must be delayed for at least n+M to generate the required codeword, which may not meet the real-time requirements of the implementation process.

At the same time, if you want to generate scrambling codes in real time, you can generate scrambling codes n+M ahead of time, which certainly meets the real-time requirements, but within this n+M time, the scrambling code generator will be monopolized and cannot Used for other purposes, several sets of scrambling code generators may be required to meet the search or demodulation functions of different multipaths or channels

Third, the method of generating scrambling codes in advance increases the power consumption of the device, and generating scrambling codes in advance also increases the complexity of control

Due to these three reasons, the traditional scrambling code generation method has a large waste in control complexity, power consumption and resources

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