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Multiple access method and device, and communication system

A multi-domain, dual-domain technology, applied in the field of devices and communication systems, a method of multiple access, can solve the problem of the number of users who cannot use 5G Internet of Things, and achieve the improvement of overall performance, expansion of dimensions, and reduction of collision probability. Effect

Pending Publication Date: 2018-07-20
ZTE CORP
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  • Abstract
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Problems solved by technology

[0008] In order to solve the requirement that the channel coding of the existing non-orthogonal multiple access method cannot use the number of users of the 5G Internet of Things, the present invention provides a multiple access method, device and communication system

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  • Multiple access method and device, and communication system
  • Multiple access method and device, and communication system
  • Multiple access method and device, and communication system

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Embodiment 1

[0119] Figure 6 It is a functional block diagram of the multiple access process according to the multiple access method of the embodiment of the present invention. User data is channel coded in the binary domain or the multiple domain, and then spread in the binary domain or the multiple domain. Each user's spreading sequence is different, and these spreading sequences need to be different to the greatest extent. That is, the cross-correlation of the spread spectrum sequence is the smallest or the number of different elements in the same position of the pairwise sequence is the least. Multivariate domain channel coding can be carried out on the multivariate domain (can be Galois domain in this embodiment), such as GF (16), and the multivariate domain spread spectrum sequence also needs to be generated on the same domain or its subfield, such as GF (16 ) or GF(4) or GF(2). Modulation can use QPSK, 16QAM or other constellations. When both multi-domain channel coding and mult...

Embodiment 2

[0121] Figure 7 It is a functional block diagram of the multiple access process according to the multiple access method of the embodiment of the present invention. User data is channel coded in the binary domain or the multiple domain, and after the binary domain or the multiple domain is spread, the binary domain is used. or multi-domain scrambling code for scrambling. The scrambling codes of different users may be the same or different. Each user's spreading sequence is different, and these spreading sequences need to be different to the greatest extent. That is, the cross-correlation of the spread spectrum sequence is the smallest or the number of different elements in the same position of the pairwise sequence is the smallest. When different users have different scrambling codes, the scrambling code design principle can be the same as or different from the spreading sequence. Users can be distinguished by multiple spreading sequences, and / or multiple domain scrambling ...

Embodiment 3

[0123] Figure 8 It is a functional block diagram of the multiple access process according to the multiple access method of the embodiment of the present invention. After user data is channel coded in the binary domain or the multiple domain, and spread by the binary domain or the multiple domain, the interleaver is used to The spread signal is interleaved. Different user interleavers may or may not be the same. Each user's spreading sequence is different, and these spreading sequences need to be different to the greatest extent. That is, the cross-correlation of the spread spectrum sequence is the smallest or the number of different elements in the same position of the two sequences is the least. When different users use different interleavers, the design principle of the interleaver is that the overlap of the same signal at the same position is the least after interleaving. User discrimination can be done by multi-domain spreading sequences, and / or an interleaver. Channe...

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Abstract

The invention provides a multiple access method, a multiple access device and a multiple access communication system. The method comprises the steps of performing binary field or multi-field channel coding on multiple pieces of received user data, and thus acquiring multiple pieces of binary field or multi-field coded data; performing binary field or multi-field spectrum spreading on each piece ofbinary field or multi-field coded data, and thus acquiring multiple pieces of binary field or multi-field spectrum spread data; and mapping the binary field or multi-field spectrum spread data to a modulated signal for sending. In order to enhance flexibility and reinforcement performance, an interleaver and a scrambled code can be further used for distinguishing users and randomizing multi-userinterference. According to the method, device and system provided by the invention, the binary field / multi-field sequence spectrum spreading is used instead of the repeated spectrum spreading, the channel coding adopts the binary field / multi-field channel coding, the multi-field spectrum spreading and multi-field channel coding have the advantages that additional modulated diversity gains can be acquired, the acquired performance is better than that based on binary spectrum spreading and the binary channel coding, and thus the whole performance of nonorthogonal multiple access is greatly enhanced.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a multiple access method, device and communication system. Background technique [0002] Multiple access technology is one of the key technologies of wireless communication. In the 5G (5th-Generation, fifth-generation mobile communication technology) era, the Internet of Things will have great development, and there will be 10 billion things in the future. In order to support such a large number of object links, a new multi-access scheme is required. After research, the industry has reached a consensus that non-orthogonal multiple access will be used to increase the number of users that can be accessed at the same time. [0003] At present, the non-orthogonal multiple access technologies proposed by domestic companies are mainly MUSA (Multi-user shared access, multi-user shared multiple access) access method, SCMA (Sparse code multiple access, sparse code...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L1/0033H04L1/0045H04L1/0071H04B1/69H04L1/00H04L27/00
Inventor 严春林袁志锋袁弋非李卫敏
Owner ZTE CORP
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