A data transmission method and device based on sm-mimo
A data transmission method and technology for transmitting signals, applied in the field of wireless communication systems, can solve the problems of complex receiver receivers, lack of practicability, restricting the use of transmission precoding strategies, etc., and achieve the effect of improving security rate and ensuring security.
Active Publication Date: 2019-10-15
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
However, it is not practical to know the CSI from the sender to the eavesdropper in advance, which limits the use of transmission precoding strategies.
In addition, the random precoding strategy does not need to know the CSI from the sender to the eavesdropper in advance. However, because the random encoder needs to rely on the actual signal to be transmitted, for example, the signal to be transmitted can be binary data, so this strategy makes the receiver receive machine becomes very complex
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[0034] In order to effectively improve the security rate of the receiving end and ensure the security of the data transmitted to the receiving end, the embodiments of the present invention provide an SM-MIMO-based data transmission method and device.
[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0036] SM is a new type of MIMO communication technology. Its core idea is that only one antenna at the sending end is activated to send data at any time, and the rest of the antennas are silent. The active antenna ca...
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The invention discloses a data transmission method and a data transmission device based on SM-MIMO. The data transmission method comprises steps that a null space matrix is determined by singular value decomposition of an MIMO channel matrix on a receiving end; an interference signal is determined according to the null space matrix, a corresponding weight vector, and a random signal; and by adopting the SM technology, the interference signal and a to-be-transmitted signal are transmitted. The interference signal is added to the to-be-transmitted signal, and the interference signal is determined according to the MIMO channel matrix singular value decomposition from a transmitting end to the receiving end, and therefore no interference on the receiving end is caused by the interference signal, and an eavesdropper is affected by the interference signal, and the safety speed of the receiving end is improved, and in addition, the safety of the data transmitted to the receiving end is guaranteed.
Description
technical field [0001] The present invention relates to a wireless communication system, in particular to a data transmission method and device based on Spatial Modulation (Spatial Modulation, SM)-Multiple-Input-Multiple-Output (MIMO). Background technique [0002] With the development of wireless communication technology, people's requirements on the service level of wireless communication are constantly increasing, and limited spectrum resources can no longer meet the ever-increasing demand for system capacity. The MIMO wireless communication system can combine transmit diversity technology and receive diversity technology at the same time, greatly improving the anti-fading performance of the communication system. Due to the reduction of bit error rate, the data transmission of MIMO wireless communication system will be more reliable; at the same time, MIMO can significantly improve the capacity level in fading channels without increasing the power of the transmitter of th...
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IPC IPC(8): H04B7/0413H04B7/06
Inventor 王莉宋梅满毅韦雅曼李若光刘洋魏翼飞滕颖蕾
Owner BEIJING UNIV OF POSTS & TELECOMM