Single-user water injection power distribution method for OFDM cognitive radio system
A water injection power allocation and cognitive radio technology, applied in the field of cognitive radio and wireless resource management, can solve the problem that traditional wireless network resource allocation technology is not fully applicable
Inactive Publication Date: 2018-09-28
GANNAN NORMAL UNIV
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Problems solved by technology
However, in an OFDM-based cognitive radio system, the user's demand for bandwidth, the number and status of available channels, and interference restriction requirements are all changing at any time. The resource allocation technology in traditional wireless networks is not fully applicable.
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[0059] Below in conjunction with accompanying drawing and embodiment example, the present invention will be further described:
[0060] figure 1 The system model established in the scenario of one cognitive user and multiple primary users in a single cell of a cognitive OFDM wireless system based on mobile communication network and wireless local area network infrastructure is given. The solid line in the figure represents the data transmission between the cognitive user and the cognitive network base station, where the cognitive network base station is located in the center of the cell, and the cognitive users are randomly distributed in the cell; the dotted line represents the interference from the cognitive user to the primary user receiver Links, dotted lines represent the communication links between each primary user.
[0061] The performance of the proposed algorithm is evaluated by numerical simulation under simulation software. Assume that the total bandwidth of the ...
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The invention discloses a single-user water injection power distribution method for an OFDM cognitive radio system. The requirement of a user for the bandwidth, the number and the condition of available channels, the interference limitation requirements and the like are changed at any time in the cognitive radio system based on OFDM, and a resource distribution technology in a traditional wirelessnetwork is not completely applicable, so that the design is flexible and efficient, and the method is suitable for a resource allocation method of the cognitive radio system. According to the single-cognitive user water injection power distribution method for an uplink of the OFDM cognitive radio system, firstly, an optimal cognitive water injection power distribution theorem is provided for theuplink in the situation that only one cognitive user and a plurality of main users exist in a single cell, and the theorem is achieved by a cognitive water injection algorithm through iteration of optimal distribution results. When the method is applied to a cognitive radio system, the performance superior to that of a traditional classic water injection algorithm can be obtained, and the constraint requirement can be met only by a small number of iterations.
Description
technical field [0001] The invention belongs to the technical field of cognitive radio and wireless resource management in wireless communication, and specifically relates to the transmission power control problem of a single cognitive user in an uplink when cognitive radio technology is adopted in an OFDM system in a mobile communication network and a wireless local area network. Background technique [0002] With the rapid development of mobile communication technology and the rapid growth of user traffic, the contradiction between limited spectrum resources and the ever-increasing service quality requirements of multimedia services has become increasingly prominent. Cognitive radio technology allows unlicensed systems to opportunistically use licensed frequency bands without causing harmful interference to licensed systems. As one of the key technologies of the cognitive radio system, the resource allocation technology has also become a research hotspot. Orthogonal Frequ...
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Login to View More IPC IPC(8): H04W52/24H04W72/04
CPCH04W52/241H04W72/0473
Inventor 朱赟陈明真辛紫男
Owner GANNAN NORMAL UNIV