Multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) cognitive radio communication method

A technology of MIMO-OFDM and cognitive communication, which is applied in the field of cognitive radio communication, can solve problems such as not explaining cognitive radio communication technology, and failing to quickly detect frequency band utilization
CN102075950BInactive Publication Date: 2013-07-31HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN ENG UNIV
Publication Date
2013-07-31
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) cognitive radio communication method. A radio-frequency module outputs intermediate-frequency data which is used for spectrum detection to determine whether a spectrum is an idle spectrum or not, if so, optimum spectrum analysis and channel estimation are conducted to determine the characteristic of the spectrum, then optimum spectrum allocation is conducted to determine routing lines for information transmission, and when a master user requires to use the current frequency band, other routing lines are selected and used for data transmission; a cognitive module transmits a control signal to the radio-frequency module, wherein the control signal is used for setting the parameters of the secondary frequency variation of the radio-frequency module and setting the communication frequency band of a data transmission module; and each cognitive user has two transmitting and receiving antennas which are used for transmitting and receiving data, and signaling information is transmitted between the cognitive module and the data transmission module and is used for selecting transmission lines and proper transmission power. The method has the advantages that the spectrum utilization ratio is improved, the channel switching times are reduced, the data transmission quality is improved and the goal of stably transmitting cognitive data to the cognitive users is achieved.
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Description

technical field

[0001] The present invention relates to a cognitive radio communication method, in particular to a MIMO-OFDM cognitive radio communication method. Background technique

[0002] With the rapid development of wireless communication technology and communication services, wireless networks are facing a contradiction between limited spectrum resources and increasing demand for spectrum resources by various services. Cognitive radio, as an intelligent wireless communication system, can perceive the surrounding wireless environment, and through the analysis of the wireless environment, change some working parameters accordingly to adapt to the environment in real time, so as to improve spectrum utilization and alleviate spectrum resource shortage The purpose is to open up a new way to effectively solve the contradiction between the shortage of spectrum resources and the low utilization rate of spectrum. MIMO-OFDM technology is currently recognized as a transmission...

Claims

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