IDMA interleaving method based on Logistic sequence

A technology of IDMA and sequence, which is applied in the field of IDMA interleaving based on Logistic sequence, can solve the problems of reduced calculation speed, reduced system performance, increased processing delay at the receiving and receiving ends, etc., and achieves the effect of strong autocorrelation and good bit error rate performance

Active Publication Date: 2020-08-04
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Therefore, when the number of users is large, as the number and length of interleavers increase, the calculation speed will gradually decrease, the internal storage resources occupied by the receiving end will gradually increase, and the processing delay at the receiving end will gradually increase, resulting in system performance degradation.

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  • IDMA interleaving method based on Logistic sequence
  • IDMA interleaving method based on Logistic sequence
  • IDMA interleaving method based on Logistic sequence

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Embodiment Construction

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only part of the implementation of the present invention. example, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0021] The invention utilizes the Lyapunov index to determine the minimum bit length of the Logistic sequence, calculates the cross-correlation for the bipolarized Logistic sequence satisfying the balance requirement, multiplies the Logistic sequence satisfying the cross-correlation threshold requirement with the data sequence to be interleaved, and completes the inter...

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Abstract

The invention belongs to the technical field of mobile communication, and particularly relates to an IDMA interleaving method based on a Logistic sequence, and the method comprises the steps: initializing IDMA system parameters, and calculating the Logistic sequence according to the IDMA system parameters; selecting at least two optimal Logistic sequences by adopting a threshold method; multiplying the optimal Logistic sequence by a sequence to be interleaved to finish sequence interleaving. The Logistic sequence obtained by the invention not only meets the requirements of chaos and balance degree, but also has strong autocorrelation and cross-correlation characteristics, and a better bit error rate can be obtained after the Logistic sequence is interleaved with the to-be-interleaved sequence.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to an IDMA interleaving method based on a Logistic sequence. [0002] technical background [0003] As a non-orthogonal multiple access method, interleaved multiple access (Interleave Division Multiple Access, IDMA) technology can significantly improve the throughput of the mobile communication system. The combination of Multiple Access (Code Division Multiple Access, CDMA), Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) and Multiple Input Output Antenna System (Multi Input Multi Output, MIMO) technology has attracted widespread attention. In an IDMA system, multiple user data at the transmitting end can share the same spreading sequence and time-frequency resource, and only different interleavers are used to distinguish users, and an iterative method of interleaving and deinterleaving is adopted at the receiving...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B1/69
CPCH04L1/0071H04B1/69Y02D30/70
Inventor 吴广富刘炼郑文逸李云庄宏成王茜竹
Owner CHONGQING UNIV OF POSTS & TELECOMM
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