Frequency point selection method and device of cognitive radio system
A cognitive radio and frequency point technology, applied in the field of communication, can solve problems such as system communication quality degradation, adjacent frequency leakage, and dynamic spectrum allocation cannot be achieved, and achieve the effect of increasing convenience, improving accuracy, and reducing equipment investment costs
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Embodiment 1
[0137] In this embodiment, it is assumed that the working scenario is that TD-LTE with the cognitive radio function uses a TV idle frequency band, wherein the TD-LTE bandwidth is 20 MHz, and the TV bandwidth is 8 MHz.
[0138] Further, it is assumed that spectrum sensing performs interference measurement of idle spectrum with a frequency bandwidth of 8 MHz (that is, the aforementioned interference measurement bandwidth), and the measurement is completed by the base station.
[0139] For the convenience of description, in this embodiment, the base station is divided into functional modules. According to the prior art, the TD-LTE base station has a spectrum sensing module and a dynamic spectrum management module. In this embodiment, an interference measurement module and a spectrum quality evaluation module are further added module.
[0140] It should be noted that, for the convenience of description, such functional module division instructions can be set according to actual ne...
Embodiment 2
[0168] In this embodiment, it is assumed that the uplink and downlink spectrum requirements of the FDD CR system are each 10 MHz.
[0169] It is further assumed that the CR base station of FDD can measure a frequency band with a bandwidth of 10 MHz when performing an interference measurement, that is, the aforementioned interference measurement capability of the base station itself, thus, it can be determined that the interference measurement bandwidth of the base station is also 10 MHz.
[0170] Such as Figure 7 As shown, it is a schematic diagram of a specific spectrum environment proposed by Embodiment 2 of the present invention. In such a spectrum environment, the frequency bandwidth available for the FDD CR system to work is 100 MHz, of which 70 MHz is in an idle state.
[0171] According to such a spectrum environment, the specific processing procedure is described as follows:
[0172] (1) The FDD CR base station discovers 70MHz idle spectrum resources through spectrum...
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