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Method and device for generating basic demodulation reference signal ZC (Zadoff-Chu) sequence

A technology for demodulating reference signals and modulating reference signals, which is applied in the field of generating basic demodulation reference signal ZC sequences, can solve problems such as increasing system operating load and occupying system storage space, and achieves reducing operating load, reducing storage capacity, and reducing hardware cost effect

Inactive Publication Date: 2011-05-18
ZTE CORP
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Problems solved by technology

[0014] As can be seen from the above method, even if Equation 2 is adopted, it will save The storage space used by the value is reduced by half, but it will still occupy a large amount of storage space in the system, thereby increasing the operating load of the system

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  • Method and device for generating basic demodulation reference signal ZC (Zadoff-Chu) sequence

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Embodiment Construction

[0040] In the LTE system, when the system executes the generation operation of the ZC sequence, in order to save the required storage space and reduce the system operating load, in the embodiment of the present invention, a factorization method based on Goldbach's conjecture is proposed to generate The ZC sequence is specifically: according to the resource units occupied by the user terminal, determine the required resources for generating the ZC sequence is the largest prime number less than the number of resource units RE occupied by the user terminal, where, when generating a ZC sequence with sequence number m, based on Perform a modulo operation on m to obtain the operation result K; then perform prime number decomposition according to K to obtain at least two prime numbers; finally, obtain at least two ZC sequences corresponding to the at least two prime numbers preset according to the obtained at least two prime numbers, Then a final ZC sequence is generated accord...

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Abstract

The invention discloses a method for generating a basic demodulation reference signal ZC (Zadoff-Chu) sequence, which comprises the following steps: according to resource units occupied by the user terminal, determining a formula disclosed in the specification, which is required by the generation of the ZC sequence, wherein the formula disclosed in the specification is the maximum prime number smaller than the quantity of the resource units occupied by the user terminal, and when generating the ZC sequence of which the serial number is m, 0<=m<=formula-1, and a modulus operation is carried out on the m on the basis of the formula disclosed in the specification to obtain to obtain the operation result K; performing prime number factorization according to the K to obtain at least two prime numbers; and obtaining at least two preset ZC sequences corresponding to the prime numbers according to the obtained prime numbers, and generating the final ZC sequence according to the obtained ZC sequences. Thus, the method provided by the invention can effectively reduce the storage capacity required when the system generates a ZC sequence, so as to lower the hardware cost required by storage, thereby greatly reducing the operating load of the system and enhancing the system performance. The invention also discloses a device for generating a ZC sequence.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for generating a basic demodulation reference signal ZC sequence. Background technique [0002] In the Long Term Evolution (LTE) system, Random Access Channel (Random Access Channel, RACH), Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH), Uplink Control Channel (Physical Uplink Control Channel, PUCCH) and Sounding The demodulation reference signal (demodulation reference signal) of the channel is generated based on the basic demodulation reference signal Zadoff-Chu (ZC for short) sequence. [0003] The formula of the ZC sequence is defined as follows: [0004] x q ( m ) = e - j πqm ( m + ...

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Application Information

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IPC IPC(8): H04J13/00H04L5/00
Inventor 曹永辉段澄泓
Owner ZTE CORP
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