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Adaptive modulation can be used to significantly enhance the spectrum utilization for both civilian applications, e.g., cognitive radio, and military ones. It requires a receiver to follow the modulation variation of a transmitter dynamically and automatically. Binary automatic modulation detection technology has been applied to detect the modulation scheme for adaptive modulation. Modulation classification...
ZigBee is a wireless technology developed as an open global standard to address the unique needs of low-cost, low-power wireless sensor networks. This standard takes full advantages of the IEEE 802.15.4 physical radio specification and operates in unlicensed bands (e.g., 2.4 GHz) worldwide at different frequencies. As more and more companies make products that use the 2.4 GHz portion of the radio...
Automatic modulation classification (AMC) has been intensively studied to enhance the successful classification rate, particularly for overcoming the physical limit that deals with weak signals received in a noncooperative communication environment. A wireless sensor network (WSN) has multiple geometrically distributed sensors to work cooperatively. The distributed signal sensing and classification...
In wireless sensor networks (WSN), location information acquisition is critical to guarantee their performance. This paper presents a new positioning method in WSN with high precision at reasonable implementation cost for 3D case. Reference nodes with known locations transmit linear frequency modulation continuous wave (FMCW), while other sensor nodes estimate the range difference to them based on...
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