A NOMA-based security rate and maximization method in MISO network

Abstract

The invention discloses a NOMA-based MISO network safety rate and maximization method, comprises the following steps: obtaining the base station transmitting power (img file = '577910DEST_PATH_IMAGE001. TIF' wi= '28' he= '31' / ) and the channel state information of the communication channel in the current network; setting the energy allocation coefficient for the legitimate user (img file= '716767DEST_PATH_IMAGE002. TIF' wi= '51' he= '47' / ) and the minimum secure information rate requirement (img file= '972299DES T_PATH_IMAGE003. TIF 'wi=' 46 'he=' 39 ' / ), converting the problem to an expression (img file= '487594DEST_PATH_IMAGE004. TIF' wi= '38' he= '31' / ); by removing the outage probability constraints from the problem (img file= '662748DEST_PATH_IMAGE004. TIF' wi= '38' he= '31' / ), converting the problem to an expression (img file= '972507DEST_PATH_IMAGE005. TIF' wi= '43' he= '31' / ).By combining the equations with one-dimensional linear search, the sum of the maximum safety rate of the system is obtained (img file = '715335DEST_PATH_IMAGE005. TIF' wi= '43' he= '31' / ). Compared with the traditional research, the invention proposes NOMA-based security rate and maximization method inMISO network, and the method of equations combined with one-dimensional linear search to replace the two-dimensional linear search scheme with large computational load, accords with the development trend of future mobile communications, and has the advantages of wide application and strong practicability.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a security rate and maximization method under a NOMA-based MISO network. Background technique [0002] With the rapid development of the Internet of Things, large-scale access scenarios are one of the scenarios that will inevitably exist in the future. While meeting the needs of different users, improving the utilization of spectrum is the core issue of communication development. Traditional CDMA, TDMA, OFDMA and other technologies are used for access. On the one hand, the base station needs to allocate resources for each user, which cannot meet the future connections that support millions of different users at the same time; on the other hand, the traditional multi-access system does not Considering the needs of different users (video, audio, pictures, text), resulting in problems such as high signaling overhead, low efficiency, and excessive complexity. Therefo...

AI Technical Summary

Problems solved by technology

[0003] While using NOMA technology to achieve higher spectrum utilization, the security of information transmission under this network model has also attracted widespread attention. In the existing physical layer security research, there is no security rate and security under the MISO-NOMA network structure. In order to achieve the maximum security rate for multiple legitimate users, most of the traditional research programs use multi-dimensional linear search strategies, which not only increases the computational burden of the system, but also affects users due to its high time consumption. poor experience

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