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Improved method of ccsk signal based on dynamic multi-peak combination

A signal and dynamic technology, applied in multiplexing communication, code division multiplexing systems, electrical components, etc., can solve problems such as increasing channel utilization, and achieve the effect of improving information transmission rate

Active Publication Date: 2019-06-07
DALIAN UNIV OF TECH
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Problems solved by technology

There is still room for further increase in its channel utilization

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  • Improved method of ccsk signal based on dynamic multi-peak combination
  • Improved method of ccsk signal based on dynamic multi-peak combination

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with specific examples.

[0031] A CCSK signal of multimodal combination in a CCSK signal improvement method based on dynamic multimodal combination:

[0032] The multi-peak combined CCSK signal is the same as the traditional CCSK signal: both contain a pilot channel and a data channel: the pilot channel uses a traditional CDMA signal for synchronization; the data channel is used for cyclic shifting of the spreading code Carry more information. The difference between the multi-peak combined CCSK signal and the traditional CCSK signal is that when the signal is transmitted, the transmitter uses m groups of spreading sequences C (i) (n) superimposed together and modulated onto the data channel, i=1~m, n=1~N. For a given system, the value of m is uncertain and can be used to transmit information, but the maximum value of m is certain, which is denoted as M here. These spread spectrum sequences are all ...

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Abstract

The invention discloses a CCSK signal improvement method based on dynamic multi-peak combination, which belongs to the technical field of communication engineering. The method comprises steps: in thecase of signal transmission, the transmitting end adjusts the properties of positive and negative of a to-be-transmitted PN code C(0), the offset s of the to-be-transmitted PN code is adjusted throughcyclic displacement, in a mode of stacking at most M groups of PN codes, the possible states of each group of spread spectrum codes can be enhanced to 2*C<N><M>2*sigma<m=1><M>C<N><m>; and signals arefinally transmitted under assistance of a synchronization strategy. When a receiver receives the signals, under help of the synchronization strategy, the original spread spectrum sequence C(0) is used, the received signals are subjected to correlation operation, and the receiver obtains the original information based on the combination condition of m peaks obtained from the correlation function and the positive and negative condition. The traditional CCSK information transfer mode is not influenced, the information amount is extraly loaded on the basis, the states contained in each spread spectrum code cycle is improved to 2*sigma<m=1><M>C<N><m> from 2*N, and the information transmission rate is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of communication engineering, relates to the field of spread spectrum communication, in particular to a method for improving CCSK signals based on dynamic multi-peak combination. Background technique [0002] The current CCSK signal is based on the traditional CDMA signal, with the help of additional synchronization means, by changing the phase of the spreading code to carry information, so as to increase the CDMA signal without affecting the spreading gain and multiple access capability channel utilization. [0003] But in the CCSK signal, a pseudo-random sequence (PN code) with a code length of N can only represent a symbol containing N states. Although it has increased compared with the traditional CDMA signal, the increase is not very large. There is room for further increase in its channel utilization. Contents of the invention [0004] Aiming at the problems existing in the prior art, the present i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/00
CPCH04J13/0003H04J13/0022H04J2013/0096
Inventor 邹德岳赵楠金明录
Owner DALIAN UNIV OF TECH
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