Research Of The Information Hiding Technology Based On MIMO System

With the Internet, computer network and cable television network convergence speed increasingly steps, audio, video image and multimedia digital products is widely used in various aspects. So the work of copyright protection and information security issues get more and more attention, greater development of multimedia security technologies. In addition, the multimedia information security technology involving state, unit and individual interests, not entirely dependent on foreign technology, need to study has independent intellectual property rights related to information hiding technology, thus the theory and its application is necessary to study. Now it is popular with the hidden information encryption organically combine together, to transmit information encrypted information hiding in other again, can achieve hidden information and its existing information contents of dual protection, therefore has stronger information privacy and security.MIMO system refers to a transmission system which uses the multiple-antenna to send and receive information. Then, the hiding-information based on the channel is a kind of method to hide information in the channel code using the redundant of error correcting code and the channel noise. Based on the hiding information algorithm of MIMO is studied, and the independent MIMO channel, and channel capacity with linear increase the number of children, the characteristics of information hiding, can effectively improve the single channel of information hiding capacity cannot too big, or information will happen distortion.This paper studies on the following content:(1) Using LDPC code principle and MIMO systems principle, will LDPC code and MIMO organic union combine the LDPC code with MIMO, is deduced based on LDPC code of the decoding process MIMO system, deduce the decoding process multiple-input multiple-output (MIMO) system based on LDPC code and use various models, prove of its superiority performance (2) Study of information hiding based on LDPC code study information hiding based on LDPC code, and based on the algorithm of the code in the MIMO systems LDPC-MIMO is proposed, based on the information hiding algorithm based on. Based on the MIMO system of the LDPC code, propose the information hiding algorithm of the MIMO system. According to this algorithm using the way of simulation experiments using this algorithm demonstrate various attacks simulation experiments. The reliability of the algorithm is analyzed, and the effective robustness against noise characteristics of attack analyze the attribute of the algorithm, reliability, robustness and effective against noise attack , points out the existing problems and the insufficiency of the algorithm, this paper presents an improved method. This algorithm and the single channel hidden algorithm are compared, this algorithm is superiority(3) According to the error and embedded data error caused by the channel noise should not exceed overall effect of channel coding ability the effect of embedded data of error and channel noise caused by error should not exceed The correction ability of channel coding, using the characteristics of error correction model of information hiding capacity, the MIMO system based on the information hiding algorithms are primarily discussed discuss the information hiding algorithm of the MIMO system with using of the model of information hiding capacity,. MIMO is deduced based on the information h ,idling capacity, the algorithm was proposed based on the information hiding systems MIMO capacity calculation formula is verified by experiments the MIMO information hiding system capacity calculation formula is given, and the capacity of single channel than hidden information capacity under Through the experiment verify that the system capacity is greater than single channel information hiding system capacity.