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Generation method of LTE (Long Term Evolution) system upstream reference signal q-step ZC (Zadoff-Chu) sequence system thereof

A reference signal and sequence technology, applied in transmission systems, multi-frequency code systems, baseband system components, etc., can solve problems such as slow calculation of trigonometric functions and large errors in fixed-point calculations

Inactive Publication Date: 2010-12-15
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for generating a q-order ZC sequence of an LTE system uplink reference signal and its system, which are used to solve the problems in the prior art that the calculation speed of the trigonometric function is relatively slow, and the fixed-point calculation error is relatively large.

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  • Generation method of LTE (Long Term Evolution) system upstream reference signal q-step ZC (Zadoff-Chu) sequence system thereof
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  • Generation method of LTE (Long Term Evolution) system upstream reference signal q-step ZC (Zadoff-Chu) sequence system thereof

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[0078] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0079] Such as figure 1 Shown is a flowchart of the q-order ZC sequence generation method of the present invention. This process describes a method for generating an uplink reference sequence in an LTE system.

[0080] In this process, the reference signal base sequence is generated using the recursive method. According to the provisions of the protocol 211, the generation formula of the q-order ZC sequence is:

[0081] x q ( m ) = e - j πqm ( m + 1 ) N ...

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Abstract

The invention relates to a generation method of an LTE (Long Term Evolution) system upstream reference signal q-step ZC (Zadoff-Chu) sequence and a system thereof. The method comprises the steps of: firstly, acquiring the length of a ZC sequence according to the number of resource blocks; secondly, calculating a q value according to the length of the ZC sequence, a sequence number and a group number; and thirdly, generating the q-step ZC sequence by a recurrence method. In the invention, the problem of longer calculation time for calculating the maximum prime number is avoided by generating a ZC sequence length lookup table; since the ZC sequence is generated through recursion by skillfully using phase characteristics, the multiplication and division with large amplitude and poor precision during direct calculation of phases are avoided, and the invention has important meaning in practical realization of fixed points; the ZC sequence is generated by the recursion algorithm, and the problem of long calculation time caused by calculating trigonometric function many times during generating the ZC sequence directly by a formula is avoided.

Description

technical field [0001] The present invention relates to the field of wireless communication, and the present invention relates to a method for generating a q-order Zadoff-Chu (ZC) sequence of an LTE (Long Term Evolution, long-term evolution) system uplink reference signal and a system thereof. Background technique [0002] LTE is a quasi-4G technology developed by 3GPP on the basis of more than ten years of B3G research technology reserves in order to counter the market challenges of mobile broadband wireless access technologies such as WiMAX under the trend of "mobile communication broadband". LTE mainly adopts OFDM and MIMO technology, which greatly improves the throughput rate of the system. [0003] The reference signal plays an important role in LTE, and is mainly used for information extraction, channel estimation and equalization at the receiving end. The q-order ZC sequence is a widely used sequence. Because of its good PAPR characteristics, it is used as a referenc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L25/03H04L27/26H04B1/707
Inventor 崔瑱周恩王秋菊王剑石晶林
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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