Channel division method in cognitive radio

A cognitive radio and channel division technology, applied in the field of channel division combining time domain and frequency domain, can solve the problems of increasing the complexity and cost of system implementation, increasing the complexity and cost of cognitive radio system, and improving the overall usage Efficiency, Effects of Increased Complexity and Cost

Inactive Publication Date: 2012-04-04
陈喆
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

If spread spectrum communication is used for the control channel and OFDM is used for data transmission, it will undoubtedly increase the complexity and cost of cognitive radio system implementation

Method used

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  • Channel division method in cognitive radio
  • Channel division method in cognitive radio
  • Channel division method in cognitive radio

Examples

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[0019] Now refer to the attached figure 1 , Which shows a diagram 100 of a method for dividing a control channel and a traffic channel of a cognitive radio system according to an embodiment of the present invention. The division method of the present invention considers both the time domain and the frequency domain. Divided from the frequency domain, the available radio spectrum is divided into N connected frequency bands of equal width, denoted as frequency band 1 (102), frequency band 2 (104), ..., frequency band N (106). Each frequency band is composed of up to M connected sub-bands of equal width, denoted as sub-band 1 (108), sub-band 2 (110), ..., sub-band m (112), ..., sub-band M( 114). Divided from the time domain, the time axis is divided into several periods of equal length, such as period 1 (116), period 2 (118), and period 3 (120). Each time period is composed of two connected sub-periods, for example, the first sub-period 124 and the second sub-period 126. 128 sho...

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Abstract

The invention belongs to the technical field of radio communication and relates to a channel division method which combines a time domain and a frequency domain. According to one embodiment of the invention, the division method for control channels and traffic channels in cognitive radio comprises the following steps: from the frequency domain, an available radio spectrum is divided into at least one frequency band, the frequency bands are mutually connected and have the same width, and each frequency band consists of at least one sub frequency band, the sub frequency bands are mutually connected and have the same width; from the time domain, a time axis is divided into at least one time period with equal length, and each time period consists of two connected sub time periods; the interval between every two adjacent time periods is equal, and the interval is used for spectrum detection; the starting moment of a time period of each frequency band is fixed; in each frequency band, at least one sub frequency band with a fixed position can be used for the control channels; and during each time period, at most one sub frequency band which can be used for the control channels is used for the control channels.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a channel division method in cognitive radio (Cognitive Radio), more specifically, to a channel division method combining time domain and frequency domain. Background technique [0002] Cognitive radio technology is an emerging wireless communication technology. The purpose of its development is to make more effective use of scarce radio spectrum resources. It introduces "intelligence" on the basis of software radio technology. In cognitive radio, a cognitive radio user, also known as a secondary user (SU for short), temporarily Borrow the radio frequency band of the primary user for communication. Generally, in cognitive radio, secondary users do not have dedicated radio frequency band resources. The existence of secondary users of cognitive radio will increase the overall utilization of the radio spectrum. [0003] In the current field of cognitive radio researc...

Claims

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Application Information

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IPC IPC(8): H04W16/10H04W16/14
Inventor 陈喆
Owner 陈喆
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