IDMA system communication method based on CCSK modulation

A system communication and IDMA technology, which is applied in baseband system components, transmission systems, multi-frequency code systems, etc., can solve the problems of IDMA system anti-interference performance degradation and achieve the effect of improving anti-interference ability

Pending Publication Date: 2018-01-19
成都极比特通信技术有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a spread spectrum communication system, when the number of access users exceeds the spread spectrum multiple, the anti-interference performance of the IDMA system will drop sharply

Method used

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  • IDMA system communication method based on CCSK modulation
  • IDMA system communication method based on CCSK modulation
  • IDMA system communication method based on CCSK modulation

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Embodiment Construction

[0044] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0045] The scheme of the present invention is based on the transmitter of the IDMA system of CCSK modulation, the receiver block diagram respectively as image 3 , 4 As shown, among them, the sending end and the receiving end; suppose the number of users is K, the spreading code length is S, and the sending data of the kth user is The CCSK modulation order is M_ary (generally M_ary=N*S). The basic sequence used by the sending end is denoted as m, and m is an m-sequence of length N. In the embodiment of the present invention, the purpose of anti-interference is achieved by adding a CCSK modulation module after the FEC encoding module at the sending end and adding a CCSK demodulation module between the DEC decoder module and the FEC decoding module at the receiving end.

[0046] At the sending end, it mainly includes four modules: forward error correct...

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Abstract

The invention discloses an IDMA system communication method based on CCSK modulation. The communication method comprises the following steps: on the basis of a traditional IDMA system, a transmittingend selects a basic sequence with a good correlation, performs CCSK modulation for the basic sequence, and then sends modulated data based on a traditional transmitter structure; and at a receiving end, the received data is firstly subjected to demodulation judgment according to an iterative detection algorithm of the traditional IDMA system, and then the data judged by each user is subjected to CCSK demodulation by using a cyclic correlation detection method. According to the method disclosed by the invention, the cyclic shift of the basic sequence carries data transmission through the introduction of CCSK modulation, and the anti-interference ability of the system can be effectively improved on the basis of maintaining original advantages of the system.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to an IDMA system communication method based on cyclic code shift keying (Cyclic Code Shift Keying, CCSK) modulation, and is especially suitable for multiple access systems that need to improve anti-interference ability. Background technique [0002] Multiple access technology is one of the key technologies of wireless communication. Its core content is how to effectively cut and allocate limited communication resources among multiple users so that they can share resources without interfering with each other. Code-Division Multiple Access (CDMA) is the core technology of the third-generation mobile communication, which has the advantages of large capacity, soft handover, and strong anti-interference ability. But the data rate of the traditional CDMA system is relatively low, which cannot meet the needs of high-speed data communication of the new generation mobile communication ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/00H04L25/02H04L25/06
CPCY02D30/70
Inventor 胡苏李帆罗渠
Owner 成都极比特通信技术有限公司
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