There are fixed thresholds in the conventional double threshold sensing techniques. There is no sensing or confusion region when the test statistic lies between high and low thresholds leading to meager detection probability and lengthier sensing time for the upcoming fifth-generation networks. Hence, there occur problems of low SNR and threshold discrepancies in conventional detectors. So, a novel composite two-tier threshold (CTTT) cooperative spectrum sensing algorithm has been proposed that utilizes the confusion region, and the energy vectors, RSSI vectors, and distance vectors are exploited by the secondary users in a two-tier process to sense the spectrum. Relay centers (RCs) are introduced that can combine the decisions of the secondary users according to different decision strategies and decide about final spectrum availability. The proposed model operates at 2.4 GHz in the sub-6 GHz band of fifth-generation communication. The proposed scheme's performance is assessed on false alarm rate, detection probability, miss detection rate, sensing time, and bit error rate vs. SNR graphs with the conventional methods. The simulated results depict that the proposed scheme outperforms the existing techniques with sensing time as low as 1.09 s, a very low miss detection probability of 0.0002100, and a significantly less BER of 0.0001, giving robust spectrum predictions for the 5G environments.

传统的双阈值传感技术有固定的阈值。当测试统计量介于高阈值和低阈值之间时，不存在感测或混淆区域，导致即将到来的第五代网络的检测概率较低且感测时间较长。因此，传统检测器存在低信噪比和阈值差异的问题。因此，提出了一种新的复合两层阈值（CTTT）协作频谱感知算法，该算法利用混淆区域，二级用户利用能量向量、RSSI向量和距离向量在两层过程中进行感知。频谱。引入了中继中心（RC），它可以根据不同的决策策略组合次用户的决策，并决定最终的频谱可用性。所提出的模型在第五代通信的 6 GHz 以下频段中以 2.4 GHz 的频率运行。所提出的方案的性能是通过传统方法在误报率、检测概率、漏检率、感测时间和误码率与 SNR 图上进行评估的。模拟结果表明，所提出的方案优于现有技术，感知时间低至 1.09 秒，漏检概率非常低，为 0.0002100，BER 显着降低，为 0.0001，为 5G 环境提供了可靠的频谱预测。