Uniform and precise energy detection method on general fading channels

Abstract

The invention discloses a uniform and precise energy detection method on general fading channels, and is applied to the general fading channel. Under a small sample size condition, compared with a conventional energy detection method, the method provided by the invention has better robustness and detection performance. According to the method provided by the invention, a tractable, precise and uniform energy detection probability closed expression on the general fading channel is obtained through solving related generalized Marcum Q functional integration; the problem that the detection performance of the current approximate energy detection method is not precise enough is solved; the problems that the precise closed expression of the detection probability of the current energy detection method is complex and the expression is difficult to process under real conditions are solved; the current energy detection method only researches the precise detection performance on a special fading channel; the method popularizes the precise detection performance to the general fading channels with general significances; the method is advantaged by that the method is simpler, more precise and more general and is easier in processing; and the method is the uniform energy detection method on the general fading channels.

Description

technical field [0001] The invention relates to the field of cognitive radio technology, in particular to a uniform and accurate energy detection method on a general fading channel. Background technique [0002] Cognitive Radio (CR) technology has become an effective solution to the problem of low spectrum efficiency by allowing Secondary Users (SU) to access licensed spectrum opportunistically. Recently, the Energy Detection (ED) method has gained widespread attention from researchers because it does not require prior knowledge of the Primary User (PU) signal and is simple to implement. Energy Detection is still a promising method for spectrum sensing. Technology. [0003] The detection performance of an ED detector is mainly determined by the false alarm probability (P f ) and detection probability (P d ) to decide, and P d It is a complex and intractable generalized MarcumQ function with Signal-to-NoiseRatio (SNR) as a parameter. However, on fading channels, due to t...

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Problems solved by technology

However, the CoG method is also only an approximation, not an exact method

There is also proposed a specific fading channel (Nakagami-m fading channel) The precise closed expressions, but these methods involve complex expressions such as infinite series, residues and MGF (MomentGeneratingFunction) functions, which make these methods difficult to handle in real signal detection

[0004] The above approximate detection probabilities cannot obtain simple and accurate closed-form expressions for the detection performance of ED detectors in fading channels, especially in general fading (α-μ) channels

Furthermore, even though exact closed-form expressions for the performance of energy detection methods are available in the current state of the art, these exact closed-form solutions are often intractable and complex

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