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    • 40. 发明申请
    • MULTIPLE STAGE HYBRID SPECTRUM SENSING METHODS AND SYSTEMS FOR COGNITIVE RADIO
    • 多级混合光谱感知方法和系统的认知无线电
    • US20120238267A1
    • 2012-09-20
    • US13408175
    • 2012-02-29
    • Kyungtae KimYan XinSampath Rangarajan
    • Kyungtae KimYan XinSampath Rangarajan
    • H04W72/04H04W4/00
    • H04W16/14H04L27/0006H04W72/1226
    • Systems and methods for detecting unused channels in a cognitive radio system are described. In one method, data is communicated on a particular channel for a secondary receiver. In addition, a set of channels is iteratively scanned by collecting samples for each channel and for each iteration of the scanning. Here, iterations of the scanning progressively removes channels from the set of channels based on the collected samples and updates states of the channels in the set based on the collected samples to obtain a set of candidate channels. In response to detecting a pre-determined condition, communications on the particular channel are precluded and at least one of the candidate channels is evaluated by collecting additional samples on each of the channels. Further, at least one of the candidate channels is selected based on the evaluation for utilization by the one or more secondary receivers for data communication.
    • 描述了用于在认知无线电系统中检测未使用信道的系统和方法。 在一种方法中,数据在用于辅助接收机的特定信道上传送。 此外,通过收集每个通道的样本和扫描的每次迭代,迭代地扫描一组通道。 这里,扫描的迭代基于收集的采样逐渐地从信道集合中去除信道,并且基于收集的样本更新集合中的信道的状态以获得一组候选信道。 响应于检测到预定条件,排除特定信道上的通信,并且通过在每个信道上收集附加样本来评估候选信道中的至少一个。 此外,基于用于数据通信的一个或多个次要接收机的利用的评估来选择至少一个候选信道。