非接触式IC卡是在卡中敷设天线，利用天线的接收发射，与读写器的天线交换信号，实现一种无线通讯，非接触式IC卡又被称为射频卡（RFC——Radio Frequency Card），简称RF卡，非接触式IC卡系统被称为射频识别系统（RFID——Radio Frequency Identification）。
NeXt generation/dynamic spectrum access/cognitive radio wireless networks: A survey Ian F. Akyildiz, Won-Yeol Lee, Mehmet C. Vuran *, Shantidev Mohanty Broadband and Wireless Networking Laboratory, School of Electrical and Computer Engineering, Geor
Future Directions in Cognitive Radio Network Research NSF Workshop Report Edited by: Peter Steenkiste, Douglas Sicker, Gary Minden, Dipankar Raychaudhuri March 9-10, 2009 Executive Summary
This study has been commissioned by Ofcom to enable it to develop its strategic response to the emerging Cognitive Radio (CR) debate, both nationally and internationally. The study, therefore, builds on previous Software Defined Radio reports1,2 and
Global System for Mobile Communications (GSM) radio’s equalizer taps reflcct the channel multipath structure. A network might want to ask a handset, “How many distinguishable multipath components are you seeing?” Knowledge of thc internal states of
Cognitive radio is widely expected to be the next Big Bang in wireless communications. Spectrum sensing, that is, detecting the presence of the primary users in a licensed spectrum, is a fundamental problem for cognitive radio. As a result, spectrum
