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The optimal spectrum sensing algorithm at the secondary user (SU) that could discriminate the PU  s  transmitting power is proposed and the related performance is analyzed. We also discuss over the cooperative sensing to combat the fading and the noise effect. It is seen that quite many important topics in the new CR scenario are different from the traditional cases, and thus deserve re-investigation. We hope our new work could open a possibly new direction for CR. bJTN{N ؚޘޘ nNS'Yf[ꁨRS|Oo`Ytxvz@b oRYec ZSXu[^0 2002 t^N[N'Yf[_f[Xf[MO 2004 t^NRb'YKQleyr'Yf[_UxXf[MO 2007 t^NeRaWVz'Yf[_ZSXf[MO0 2008 t^(WeRaWybxvz@\DOxvzbNxvzXT 2009 t^ 2010 t^(W NhVE'Yf[NRtYec0 2010 t^ 12 gwReQnNS'Yf[ꁨRS|Oo`Ytxvz@b0NvNNOSYtNe~OvtN^(uxvz]\O ]Shf[/ge 149 {+TU_(u vQ-N IEEE VEg Re 57 { IEEE VEOe 72 {0e] SCI 6eU_ 66 { VQYf[_(u 2100 YO!k7Lkf[/gd"} SCI N_ 403 !k US{ SCI gؚN_ 65 !k0]3uV[SfN)R 7 yTVESfN)R 3 y0 2014 t^V[6qWё:NOyRt^Wё 2013 t^ IEEE OOSON*Y0W:SpgQRt^f[N*Y0W:SqQ 5 NVY -NVN$NN 0_ 2012 t^ SCOPUS -NVRt^yf[KNfySe~ONOSYtW/UNVY 0xvzbgS0RVQYf[/gLuv͑ƉNS IEEE VEf[/g~~vؚ^ċN v^_ 2014 t^ ICT VEOvgsOeVY 2010 t^ WCSP VEOvgsOeVY0vMR:N IEEE Senior Member bN-NV5uP[f[OOo`ROYXT -NVOf[ORt^]\OYXTOOS\OYXT IEEE OSYtOSOOOSYtRO (SPCOM-TC) YXTv^bN IEEE Transactions on Wireless Communications IEEE Wireless Communications Letters NS China Communications YbN IEEE GLOBECOM 2014, IEEE ICC 2015, IEEE VTC 2014 Fall I{e~OWVEe0OvROqQ;N-^ NS 20 Y!k IEEE VE'YOvb/gYXTOYXT0     0000000000161>1B1T1V1f1j1r1t11111111*2,2.2̽xgXxhr+haB*KHaJph!h ghaB*KHQJaJph!hr+haB*KHQJaJph hr+haB*KHaJo(ph hw5B*KHQJ\o(ph#hr+hw5B*KHQJ\phhQM5B*KHQJ\phhQMheCJKHPJ^Jo(!h[Fh[FB*KHQJaJph$h[Fh[FB*KHQJaJo(ph.202224282B2F2H2P2R2d2f2r2x22222222222222222222222*3,3.3D3F3߿α߱߿߿߿ߥ߱zkhr+hwB*KHaJph(haB*OJQJfHphq +haB*OJQJfHo(phq haB*KHaJphhaB*KHaJo(phhr+haB*KHaJph!h54haB*KHQJaJph!hr+haB*KHQJaJphhaB*KHQJaJo(ph(.3H3J38 8? ?"?&?(?,?.?2?4?6?8?gdcgd $1$9Da$gdw1$9Dgd g $1$9Da$gdaF3H3J3T3888 8,888:8@8v8888888пziUB1B1B1B!hJ>@>J>>>>>????jh]|>U hwo($hJUh]|> 0182P. 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