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Generation method of random access leader sequence of LTE system and device thereof

A random access preamble and generation device technology, applied in the field of communication, can solve the problems of ZC sequence generation method, such as large amount of calculation, to improve efficiency, overcome computational complexity, and improve calculation speed

Active Publication Date: 2011-06-22
SANECHIPS TECH CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0025] The present invention aims to provide a method and device for generating a random access preamble sequence of an LTE system, so as to solve the problem that the ZC sequence generation method in the prior art has a large amount of computation;

Method used

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  • Generation method of random access leader sequence of LTE system and device thereof
  • Generation method of random access leader sequence of LTE system and device thereof
  • Generation method of random access leader sequence of LTE system and device thereof

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Embodiment Construction

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments;

[0042] figure 1 A flow chart showing a method for generating a ZC sequence according to an embodiment of the present invention includes the following steps:

[0043] Step S10, setting the random access preamble of the LTE system to be x u，v (n)=x u ((n+C v ) mod N ZC ),in, x u ( n ) = e - j πun ( n + 1 ) N ZC It is a ZC sequence, 0≤n≤N zc -1, N zc is the length of the ZC sequence, u is the root sequence index that has a one-to-one correspondence with the ...

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Abstract

The invention provides a generation method of a random access leader sequence of a Long Term Evolution (LTE) system and a device thereof, and the generation method comprises the following steps: setting the random access leader sequence of the LTE system to x[u, v] (n) = xu ((n+Cv) mod NZC); generating a sequence {e<-j(2pii) / (NZC)>} with a length of Nzc as an indexed table to be stored in a memory; mapping the ZC sequence xu(n) to the sequence {e<-j(2pii) / (NZC)>}, searching the indexed table in the memory according to the mapping relationship to obtain xu(n) and then obtaining random access leader sequence x[u, v] (n). The invention reduces the occupation of the memory space and increases the calculating speed of the ZC sequence.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for generating a random access preamble of an LTE (Long-Term Evolution, long-term evolution) system. Background technique [0002] Compared with the current communication technology, the LTE system based on Orthogonal Frequency Division Multiplexing (OFDM) can provide higher data transmission rate, obtain higher spectrum utilization, user throughput, more optimized signaling process, and shorter time delay, a simpler network structure based on IP bearer, and a more complete QoS management mechanism, etc. [0003] Random access is an access mode for a user to communicate with an eNodeB (evolved base station, hereinafter referred to as a base station). The user sends some control information to the base station in a competitive manner to request communication with the base station at a specified time and on a specified channel. According to whether the user ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04B7/26
Inventor 韩山秀
Owner SANECHIPS TECH CO LTD
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