Partial reconfiguration based broadband spectrum perception method

A broadband spectrum, fully reconstructed technology, applied in network planning, sustainable buildings, transmission systems, etc., can solve the problems of sparsity effect and large amount of calculation, and achieve the goal of improving real-time performance, ensuring detection accuracy, and reducing computing time. Effect

Inactive Publication Date: 2014-08-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] In order to solve the problem that the calculation amount is huge and the compression ratio is affected by the sparsity of the original signal in the existing wideband spectrum sensing technology, the present invention provides a wideband spectrum sensing method based o

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  • Partial reconfiguration based broadband spectrum perception method

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[0036] The present invention will be further described below in conjunction with accompanying drawing.

[0037] The core idea of ​​the present invention is to combine the compressed sampling technology with the perception of wideband spectrum in cognitive radio. Based on the minimum l 1 The interior point method for norm solution is improved. Let the number of iterations change with the energy of the reconstructed sub-channel. The present invention can not only be applied in the broadband spectrum environment with constant sparsity, but also can achieve good detection effect in the case of time-varying sparsity. On the premise of ensuring the precision, the invention can reduce the operation time and improve the real-time performance of detection.

[0038] In cognitive wireless networks, the task of spectrum sensing is to realize dynamic spectrum access under the premise of protecting the primary user. Cognitive users need to detect in each sampling period to determine whe...

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Abstract

The invention provides a partial reconfiguration based broadband spectrum perception method, aiming to apply the idea of partial reconfiguration to a minimum norm solution based interior point method. Different from a traditional reconfiguration method without adjustment, the broadband spectrum perception method is characterized in that gradual adjustment is performed according to sampling values and through multiple iterative calculations. The number of iterations is regular but changes with the energy of reconfigured sub-channels. If the energy is large, the number of the iterations is reduced, and if the energy is small, the number of the iterations is increased. The partial reconfiguration based broadband spectrum perception method can be used in the situation that the sparseness is unknown or even in the broadband spectrum scenario with the changed sparseness, calculation time is reduced under the condition that detection precision is guaranteed, and timeliness of detection is improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a wideband spectrum sensing method based on partial reconstruction. Background technique [0002] In cognitive radio (CR, Cognitive Radio), the two goals of providing reliable communication and efficient use of radio spectrum determine the importance of fast and accurate spectrum sensing. However, when sensing wideband spectrum, the required high sampling rate and massive sampling data processing capability pose severe challenges to the spectrum sensing hardware. In reality, the number of sub-bands occupied by primary users on the broadband spectrum is far less than the total number, which satisfies sparsity. So people naturally think of Compressed Sampling (CS, Compressed Sampling, also known as Compressed Sensing, Compressive Sensing). It shows that as long as the signal is compressible or sparse in a certain transformation domain, an observation matrix unrelated to the ...

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Application Information

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IPC IPC(8): H04W24/00H04B17/00H04W16/14
CPCY02B60/50Y02D30/70
Inventor 涂思怡宋晓勤朱勇刚张恒龙彭亚
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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