Key issues of cognitive radio
Jin Tian, Tian Tian · Multiagent and Grid Systems · 2010
This paper discusses three the fundamental issues of Cognitive radio: Frequency, Modulation and Power. Frequency is located in 3.1 GHz ∼ 10.6 GHz so that the system can sufficiently utilize UWB spectrum resource and communications channel. OFDM UWB t