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Small cells deployed over the existing macrocell network reduce the access distance and thus offer an energy-efficient solution to provide high data rate coverage. However, dense deployment of small cells may cause energy waste under low load conditions. To cope with this issue, power saving techniques for small cell networks need to be carefully investigated. Invoking a sleep mode is one of the most...
A 3D passive localization algorithm on the low-altitude aircraft is presented, which takes use of CDMA cellular network pilot signals. The method is using the time differences of arrival (TDOA) of CDMA cellular network pilot signals to make twice weighted least squares (WLS), and then taking use of the original information of inertial navigation system (INS) to make fuzzy elimination, finally achieving...
A remote measurement and control system of large-scale greenhouse was developed based on GSM-SMS. The whole system consists of a central station and base stations. The central station is composed by a PC server along with its application software, the GSM module, and the database system. The base station consists of a microcontroller, sensors, the operation administer, and GSM module. Modularization...
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