This paper presents an ultra-low power super-regenerative receiver (SRR) suitable for OOK modulation. The receiver is fabricated in 40 nm CMOS technology and operates in the ISM band of 902–928 MHz. It exploits a SAR architecture to calibrate the internally generated quench signal. Employing an on-chip inductor and a single to differential architecture for the input amplifier has made the receiver fully integrable, eliminating the need for external components. A power consumption of 320 µW from a 0.65 V supply results in an excellent energy efficiency of 80 pJ/b at 4 Mb/s data rate, while the best sensitivity is −87 dBm at 1 Mb/s data rate.

Although sophisticated wireless radio technologies make it possible for unlicensed wireless devices to take advantage of un-used broadcast TV spectra, those looking to advance the field have lacked a book that covers cognitive radio in TV white spaces (TVWS). Filling this need, TV White Space Spectrum Technologies: Regulations, Standards and Applications explains how white space technology can be used to enable the additional spectrum access that is so badly needed. Providing a comprehensive overview and analysis of the topics related to TVWS, this forward-looking reference contains contributions from key industry players, standards developers, and researchers from around the world in TV white space, dynamic spectrum access, and cognitive radio fields. It supplies an extensive survey of new technologies, applications, regulations, and open research areas in TVWS. The book is organized in four parts: Regulations and ProfilesCovers regulations, spectrum policies, channelization, and system requirements StandardsExamines TVWS standards efforts in different standard-developing organizations, with emphasis on the IEEE 802.22 wireless network standard CoexistencePresents coexistence techniques between all potential TVWS standards, technologies, devices, and service providers, with emphasis on the Federal Communications Commissions (FCC) recent regulations and policies, and IEEE 802.19 coexistence study group efforts Important AspectsConsiders spectrum allocation, use cases, and security issues in the TVWS network This complete reference includes coverage of system requirements, collaborative sensing, spectrum sharing, privacy, and interoperability. Suggesting a number of applications that can be deployed to provide new services to users, including broadband Internet applications, the book highlights potential business opportunities and addresses the deployment challenges that are likely to arise.

This chapter provides an overview of the IEEE Standard 802.22-2011 Wi-FAR™ standard . This standard provides rural area broadband access and fulfils the dire need for cost-effective backhaul and middle-mile solution in developing countries. We discuss how those needs tie to the requirements definition and the operation of the IEEE 802.22 Wi-FAR systems. This chapter provides a special emphasis on the several cognitive radio (CR) features and techniques incorporated or referred to in the standard. These features include geo-location and access to an incumbent database, spectrum sensing, regulatory dependent policies, channel set management, spectrum etiquette, and self-coexistence mechanisms. On the basis of the regulatory rules applicable locally, the different CR features can be turned on or off. This chapter describes the ongoing white spaces implementations, trials, and deployments all over the world. Finally, this chapter provides an overview of the future enhancements to the IEEE 802.22 Standard and other activities of the Working Group to provide spectrum sharing solutions such as advanced beaconing for radar and communications coexistence and new activity on spectrum characterization and occupancy sensing.