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A multi-carrier complementary code single code cyclic shift multiple access method

An access method and complementary code technology, which is applied in the field of multi-carrier complementary code single code cyclic shift multiple access, can solve the problems of limited number of address codes and inability to meet the needs of massive user connections, and reduce decoding Complexity, extensive use value, and the effect of overcoming multiple access interference

Active Publication Date: 2021-11-23
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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  • A multi-carrier complementary code single code cyclic shift multiple access method
  • A multi-carrier complementary code single code cyclic shift multiple access method
  • A multi-carrier complementary code single code cyclic shift multiple access method

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Embodiment Construction

[0084] Specific implementation plan

[0085] Now in connection with the instructions Figure 1 ~ 3 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0087] Step 1, construct a multi-carrier CC-ICCS address code by circulating the original complement code C (1, M, N);

[0088] Step 2, build a downlink multi-carrier CC-ICCSMA sender and send signals to the CC-ICCSMA system;

[0089] Step 3, build a downlink multi-carrier CC-ICCSMA receiver, and receive signals for the CC-ICCSMA system.

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

[0091] Step 1.1, select the original complement C (1, M, N), where M and N represent the number of complementary codon sequences (subcode) and the code length of the sub-sequence, the mth code sequence is represented as C. m = [C m，1 , C m，2 , ..., c m，N ], Where C m...

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Abstract

The present invention provides a multi-carrier complementary code single-code cyclic shift multiple access method, which includes the following steps: Step 1, constructing a multi-carrier CC by cyclically shifting the original complementary code C (1, M, N) ‑ICCS address code; step 2, build a downlink multi-carrier CC‑ICCSMA transmitter and process the signal sent by the CC‑ICCSMA system; step 3, build a downlink multi-carrier CC‑ICCSMA receiver, and process the signal received by the CC‑ICCSMA system ; The method of the present invention is a kind of overload communication system based on CC-ICCSMA, and the code word expansion is obtained by cyclically shifting the CC address code, and its single-code support user number can be expanded to original N times, and the overload rate of the system is N / M; when ICCS is used for a family of CC sequences, the user capacity is expanded exponentially; the non-orthogonal multiple access method provided can significantly reduce the decoding complexity of the system, and has a wide range of use values.

Description

Technical field [0001] The present invention relates to the field of communications, and more particularly to a multi-carrier complementary code single code cycle shift multiple access method. [0002] technical background [0003] In order to support the demand for wireless access networks that future index multiples, non-orthogonal multi-access access (NOMA) has received extensive attention, NOMA is compared to orthogonal multicrange access (OMA) More user communication can be supported, which can significantly improve spectral efficiency. However, existing NOMA technology has a defect in the "interference control" level. For example, the power domain NOMA technology requires multiple users' signals in power, thereby causing a serious burden on signal processing technology and networking technology; and then, as design of user signature code in code domain NOMA (CD-NOMA) technology In order to inhibit the interference of multi-user, in the receiving end, the system needs to desi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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