Sequence allocation and processing method and device for communication system

Abstract

The embodiment of the invention provides a sequence distribution and processing method in a communication system and a corresponding device thereof. Sequences in each sequence group are divided into a plurality of subgroups; the sequences in each subgroup are obtained by selecting from a candidate sequence set corresponding to the subgroup according to a certain rule; definite sequences are distributed to a subarea by the system. As for the subgroup i, a function fi (question mark) corresponding to the subgroup is determined and a domain of definition of the function is the candidate sequenceset corresponding to the subgroup; the sequences in the subgroup i of the sequence group k are determined by selecting n sequences in the candidate sequence set while the sequences cause values of a function d (fi (question mark), Gk) to be smaller, wherein, k is a group number of the sequence group, i is a sequence number of the subgroup, n is a natural number, d(a, b) is a binary function and Gk is a value determined by the group number k. The occurrence of the sequence highly correlative to a certain length of the sequence can be avoided in other sequence groups, thus reducing strong interference. No substantial tables of the sequence group are required to be stored so as to reduce the complexity of the system.

Description

technical field

[0001] The invention relates to the communication field, in particular to a sequence allocation technology in a communication system. Background technique

[0002] In communication systems, a class of sequences with constant amplitude zero autocorrelation (CAZAC, constant amplitude zero auto-correlation) is a very important communication resource. Its characteristics are specifically:

[0003] ■ The modulus of the amplitude is a constant value, for example, it can be normalized to 1.

[0004] ■Zero-period autocorrelation, except for the maximum correlation with itself, other cyclic shift autocorrelations of the sequence itself are zero.

[0005] Since the CAZAC sequence has the above properties, the sequence in the frequency domain is also a CAZAC sequence after Fourier transform. The sequence with this characteristic is suitable as a reference signal in communication, for channel estimation and so on.

[0006] For example, in a single carrier frequency d...

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