Cognitive radio technology necessitates accurate and timely sensing of primary users' activity on the chosen set of channels. The simplest selection procedure is a simple random choice of channels to be sensed, but the impact of sensing errors with respect to primary user activity or inactivity differs considerably. In order to improve sensing accuracy and increase the likelihood of finding channels which are free from primary user activity, the selection procedure is modified by assigning different sensing probabilities to active and inactive channels. The paper presents a probabilistic analysis of this policy and investigates the range of values in which the modulation of sensing probability is capable of maintaining an accurate view of the status of the working channel set. We also present a modification of the probability modulation algorithm that allows for even greater reduction of sensing error in a limited range of the duty cycle of primary users' activity. Finally, we give some guidelines as to the optimum application ranges for the original and modified algorithm, respectively.

中文翻译：

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通过感知概率的调制提高认知PAN中的感知准确性。

认知无线电技术需要准确，及时地感知主要用户在所选频道集合上的活动。最简单的选择过程是要感测的信道的简单随机选择，但是感测错误对主要用户活动或不活动的影响差异很大。为了提高感测精度并增加找到没有主要用户活动的频道的可能性，通过将不同的感测概率分配给活动和不活动频道来修改选择过程。本文介绍了此策略的概率分析，并研究了感测概率的调制能够保持对工作信道集状态的准确观察的值的范围。我们还提出了概率调制算法的一种修改形式，该修改形式允许在主要用户活动的占空比的有限范围内更大程度地降低感测错误。最后，我们给出了有关原始算法和改进算法的最佳应用范围的一些准则。