System Level Design for a Cognitive Radio Receiver “Application for IEEE802.22 Standard”

this project aims to design and implement a new Cognitive Radio (CR) receiver targeting the IEEE 802.22 standard as the first world-wide CR standard. In fact, this project starts with a study and a comparison of various CR receivers. This study leads to the presentation of a new approach that was adopted based on sub-band sensing technique for a CR receiver. In addition, we demonstrate a system level design that was applied to this architecture. Then, the overall radio system characteristics, fixed by the IEEE 802.22 Standard specifications, are dispatched through various receiver blocks. Besides, we exhibited the theoretical computation and different techniques of system level design. Each of Radio Frequency (RF) characteristics such as gain, noise figure (NF) and linearity (third order intercept point, (IIP3)) is simulated depending on the analog-to-digital converter (ADC) full scale power requirement. At the end, the system level simulation results justified that the new approach allows to carry out spectrum sensing and communication processing. The receiver presents 51dB as a total gain and an IIP3 of -19.8 dBm for low gain mode. Also, it performs 105dB as gain and a noise figure of 9.9 dB for high gain mode. Index terms —Cognitive Radio, IEEE 802.22, Spectrum sensing, Receiver, system level design, budget analysis, linearity, noise, gain.