Detection method and system of straight receiver

A detection method and detection system technology, which is applied in the field of spectrum detection, can solve the problems of no mature feasible solution, can not guarantee the effective protection of the main user system, interference, etc., and achieve the effect of solving the problem of hidden stations

CN101998587BInactive Publication Date: 2014-12-31BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-12-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a detection method of a straight receiver, comprising the steps of: after a communication link is established between a main receiver and a main transmitter, transmitting signals to a peripheral subordinate user by the main receiver through a signal transmitter arranged on the main receiver per se so as to inform the main receiver of a used authorization receiving frequency; and determining a frequency spectrum cavity by a slave transmitter receiving the signal according to the signal. The invention also relates to a detection system of the straight receiver, comprising the main receiver provided with the signal transmitter, and the slave transmitter. In the invention, an information interaction mode between a main user and a subordinate user is adopted and the main receiver is used for informing the subordinate user of the authorization receiving frequency information so that the subordinate user can determine the frequency spectrum cavity depending on the main receiver, and the method can effectively solve the hidden station problems and other problems of interference on the main receiver due to inaccurate subordinate user frequency spectrum detection.
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Description

technical field

[0001] The invention relates to spectrum detection technology in cognitive radio, in particular to a direct receiver detection method and system. Background technique

[0002] At present, the interference in cognitive radio can be divided into two types, one is the direct interference caused by using the licensed frequency band of the primary user (Primary User) from the secondary user (Secondary User); the other is due to the interference detected from the user spectrum Inaccurate, causing secondary users to use frequency bands that should not be used, thereby causing interference to primary users. A typical scenario of such interference is the hidden station problem (Hidden Terminal Problem). A brief introduction to the hidden station problem is given below.

[0003] figure 1 Shown is a typical covert station problem scenario, which is also a class of intractable interference problems in cognitive radio systems. Only relying on the traditional transmitte...

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Embodiment Construction

[0079] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0080] Aiming at the problems of existing transmitter detection and receiver detection, the present invention proposes a direct receiver detection scheme. The so-called "direct" means that the master receiver notifies the slave user of its authorized frequency. The invention adopts the method that the master receiver transmits signals to the slave users to realize the direct receiver detection. The master receiver and the slave user can notify the slave user of the authorized receiving frequency used by the master receiver through various forms of information interaction. However, the present invention does not specify the form in which the master receiver notifies the slave users of the authorized reception frequency. In the following several embodiments, the master receiver can transmit the information representing ...