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Method of LTE (Long Term Evolution) downlink auxiliary synchronizing channel detection with low complexity

A synchronous channel, low-complexity technology used in communications between multiple stations, wireless communications, electrical components, etc.

Inactive Publication Date: 2010-09-15
FUDAN UNIV
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Problems solved by technology

[0005] If the signal is a sequence of length N, using the current correlation detection algorithm to detect a signal requires N×N multiplication operations, which has a certain complexity

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  • Method of LTE (Long Term Evolution) downlink auxiliary synchronizing channel detection with low complexity
  • Method of LTE (Long Term Evolution) downlink auxiliary synchronizing channel detection with low complexity
  • Method of LTE (Long Term Evolution) downlink auxiliary synchronizing channel detection with low complexity

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Embodiment Construction

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] The method of the present invention is to separate the parity and even bits of the S-SCH sequence of the received frequency domain signal to obtain the odd sequence and the first bit of the even sequence, and then perform the "rearrangement-Hadamard matrix fast transformation-rearrangement" operation respectively , to replace the traditional direct correlation operation with the local correlation matrix, thereby simplifying the algorithm complexity of S-SCH signal detection from 31×31 multiplications to 5×32 additions. The cell identity group number is composed of the secondary synchronization sequence index number pair (m 0 , m 1 ) is uniquely determined. where m 0 , m 1 It is obtained by correlation detection of odd bits ...

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Abstract

The invention relates to a method of LTE (Long Term Evolution) downlink auxiliary synchronizing signal detection with low complexity, belonging to the technical field of mobile communication. The method comprises the following steps of: separating odd bits and even bits of an auxiliary synchronizing sequence of the received frequency-region signals to acquire an odd sequence and an even sequence; respectively carrying out sequence rearrangement, fast transformation of a Hadamard matrix and sequence rearrangement again on the odd sequence and the even sequence after descrambling to realize serial correlation operation; screening the identification number m0 corresponding to the maximal correlation value from the odd sequence; reducing the serial number range of the even sequence according to the corresponding relation between m0 and m1; screening the identification number m1 corresponding to the maximal correlation value from the even sequence of which the serial number range is reduced; and acquiring the corresponding cell identification mark according to the size relation between m0 and m1, wherein the subframe is a subframe 0 or a subframe 5. The invention simplifies the algorithm complexity of S-SCH signal detection from multiplication of 31*31 times to addition of 5*32 times, thereby greatly reducing the computation complexity in the detection process.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for detecting a low-complexity LTE downlink secondary synchronization channel. Background technique [0002] A 3rd Generation Partnership Project Long Term Evolution (3rd Generation Partnership Project Long Term Evolution, 3GPP-LTE) mobile communication system is an evolution of a 3rd generation (3rd generation, 3G) mobile communication system. [0003] Downlink synchronization is an important part of cell search. The mobile station needs to obtain time and frequency synchronization and cell identity from the downlink synchronization channel sent by the cell base station. In the LTE system, the mobile station can complete downlink synchronization through a primary synchronization channel (primary synchronization channel, P-SCH) and a secondary synchronization channel (secondary synchronization channel, S-SCH). Specifically, the mobile station ...

Claims

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Application Information

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IPC IPC(8): H04W24/02H04B7/26
Inventor 刘炳红胡蝶
Owner FUDAN UNIV
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