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Pseudorandom sequence parallel generation method in LTE system

A pseudo-random sequence, middle look-up table technology, applied in the field of communication, can solve the problems of tedious, time-consuming and long vector space transformation, and high complexity of matrix-vector multiplication operations, and achieves the effect of simple table look-up operation, simple implementation, and easy implementation.

Active Publication Date: 2014-06-18
BEIJING SMART LOGIC TECH CO LTD
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Problems solved by technology

[0008] In order to overcome the time-consuming serial generation of pseudo-random sequences used for scrambling or descrambling in LTE systems and the need for frequent calculation of transformation matrix P for vector space transformation and the high complexity of matrix-vector multiplication operations, both of which are not conducive to The implementation of embedded mobile devices, especially the multiplication operation of matrix vectors, is particularly cumbersome

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  • Pseudorandom sequence parallel generation method in LTE system
  • Pseudorandom sequence parallel generation method in LTE system
  • Pseudorandom sequence parallel generation method in LTE system

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Embodiment Construction

[0051] The present invention proposes a fast and efficient method for generating a pseudo-random sequence used for scrambling or descrambling operations. The method only includes simple operations such as table lookup, shifting, and XOR, which is beneficial to the implementation of embedded mobile processors and shortens the processing time. Pseudo-random sequence generation time.

[0052] The method is mainly aimed at quickly, efficiently and parallelly generating pseudo-random sequences used for scrambling or descrambling operations in the LTE physical layer protocol, but is not limited thereto. As can be seen from the method described in the present invention, its generation method for the required pseudo-random sequence of scrambling operation in the wireless communication protocol is similar, but the initial state of the pseudo-random sequence and the calculation rules are different, and this method can be easily be realized.

[0053] In order to make the object, technic...

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Abstract

The invention provides and discloses a method for generating a pseudorandom sequence in parallel at eight bits through table look-up and simple logic operation operations. According to the method, by means of computation rules used when a look-up table is built and shifting and bitewise XOR operations of look-up table output results and input data, a series of operations of the pseudorandom sequence generation process are finished. Meanwhile, a method for generating multiple paths of the pseudorandom sequences in parallel by means of SIMD instructions is provided. The method can shorten the time used for generating the pseudorandom sequences, the data sequences can be quickly generated, design flexibility is improved, and the method can be widely used for a 4G base station and a mobile device.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for generating pseudo-random sequences in parallel in an LTE system. Background technique [0002] With the development of science and technology, wireless communication technology has been widely used, and users can obtain effective information brought by wireless communication systems at any place and any time. However, if no security protection measures are taken for the transmitted data in the wireless communication system, the third-party user can easily obtain the data information of the current user. At the same time, in actual digital communication, after the information flow is encoded, there may be continuous "0"s or continuous "1", which destroys the balance of the code and affects the establishment and maintenance of bit synchronization. [0003] In a Long Term Evolution (Long Term Evolution, LTE) system, scrambling also has a third-layer function. F...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/10
Inventor 吴军宁王晓琴郭晓龙赵旭莹林啸张森郭璟王伟康
Owner BEIJING SMART LOGIC TECH CO LTD
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