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Multicarrier complementary code single-code cyclic shift multiple access method

An access method and complementary code technology, which are applied in the field of multi-carrier complementary code single code cyclic shift multiple access, and can solve problems such as the inability to meet the needs of massive user connections and the limited number of address codes.

Active Publication Date: 2021-01-19
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] In view of the limited number of address codes in the process of multiple access access, which cannot meet the needs of a large number of user connections, the present invention proposes a multi-carrier complementary code single code cyclic shift multiple access (Complementary coded identical codecyclic shift multiple access, CC-ICCSMA ) access method

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  • Multicarrier complementary code single-code cyclic shift multiple access method
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  • Multicarrier complementary code single-code cyclic shift multiple access method

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[0084] specific implementation plan

[0085] Now combined with the manual Figure 1~3 The specific implementation of the method of the present invention will be described in detail.

[0086] The method of the present invention comprises the following steps:

[0087] Step 1, constructing a multi-carrier CC-ICCS address code by cyclically shifting the original complementary code C (1, M, N);

[0088] Step 2, building a downlink multi-carrier CC-ICCSMA sending end and processing the signals sent by the CC-ICCSMA system;

[0089] Step 3, building a downlink multi-carrier CC-ICCSMA receiving end to process the received signal of the CC-ICCSMA system.

[0090] Further, the original complementary code C (1, M, N) described in step 1 constructs a multi-carrier CC-ICCS address code by cyclic shift, including the following steps:

[0091] Step 1.1, select the original complementary code C (1, M, N), wherein, M and N respectively represent the number of complementary code subsequence...

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Abstract

The invention provides a multicarrier complementary code single-code cyclic shift multiple access method, which comprises the following steps of: 1, constructing a multicarrier CCICCS address code bycyclically shifting an original complementary code C (1, M, N); 2, constructing a downlink multi-carrier CCICCSMA sending end, and processing signals sent by a CCICCSMA system; 3, constructing a downlink multi-carrier CCICCSMA receiving end, and processing a received signal of the CCICCSMA system. The method is applied to an overload communication system based on CCICCSMA, codeword extension is obtained through cyclic shift CC address codes, the number of users supported by a single code can be extended to N times of the original number, and the overload rate of the system is N / M; when the ICCS is used for a group of CC sequences, the user capacity is expanded exponentially; the non-orthogonal multiple access method provided by the invention significantly reduces the decoding complexity ofthe system, and has a wide use value.

Description

technical field [0001] The present invention relates to the communication field, in particular to a multi-carrier complementary code single code cyclic shift multiple access method. [0002] technical background [0003] In order to support the needs of future exponentially growing wireless access networks, non-orthogonal multiple access (NOMA) has received extensive attention. Under limited spectrum resources, NOMA is more efficient than orthogonal multiple access (OMA) It can support more user communications, and can significantly improve spectrum efficiency. However, existing NOMA technologies all have defects at the level of "interference control". For example, power domain NOMA technology requires multi-user signals to have differences in power, which imposes a serious burden on signal processing technology and networking technology; another example is the design of user signature codes in code domain NOMA (CD-NOMA) technology And decoding problems, in order to suppres...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B1/7103
CPCH04B1/7103H04L27/2607H04L27/261
Inventor 刘喜庆彭木根王志峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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