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The spectrum sensing is a vital stage in cognitive radio networks. The performance of energy-based spectrum sensing scheme degrades under noise uncertainty, which can be improved by covariance-based ...

This $200 touchscreen car stereo with backup camera is on sale for just $40 at Walmart, and shoppers say it “works great.” ...

Mama Duke always believed that "if I kept showing up as me, the right doors were bound to appear in front of me." White House responds to Zohran Mamdani's election win The top US general says it ...