Dynamic Interference Optimization in Cognitive Radio Networks for Rural and Suburban Areas

Figure 5

Testbed hardware diagram including a tuning antenna receiving the on-the-air LTE-A signal, a band pass filter, a downconverter mixer, and its local oscillator, a UHF band filter, a step attenuator (Step Att), and a Digital Programmable Attenuator (DP Att), a Field Programmable Gate Array (FPGA) connected through USB to a computer (PC) running our algorithm, a Directional Combiner, a Broadcasting signal generator, a TV Receiver, and a spectrum analyzer.