Abstract: Embodiments of the invention include a system for reducing tropospheric ducting and tropospheric refraction in a wireless telecommunication network. A base station or network component receives weather information and determines if conditions are right for tropospheric ducting or tropospheric refraction. A simultaneous rise in UL interference, call failure rates, and call drop rates in adjacent markets can indicate tropospheric ducting. A rise in UL interference, call failure rates, and call drop rates by devices in one market can indicate tropospheric refraction. Where these UL interferences, call failure rates, and call drop rates occur daily for a similar duration each day, they are treated as being caused by tropospheric propagation and a mitigation routine is implemented through antenna down-tilt.

Abstract: Embodiments of the invention include a system for reducing tropospheric ducting and tropospheric refraction in a wireless telecommunication network. A base station or network component receives weather information and determines if conditions are right for tropospheric ducting or tropospheric refraction. A simultaneous rise in UL interference, call failure rates, and call drop rates in adjacent markets can indicate tropospheric ducting. A rise in UL interference, call failure rates, and call drop rates by devices in one market can indicate tropospheric refraction. Where these UL interferences, call failure rates, and call drop rates occur daily for a similar duration each day, they are treated as being caused by tropospheric propagation and a mitigation routine is implemented through antenna down-tilt.

Abstract: A system, media, and method, for aperiodic antenna calibration triggering in a wireless network is provided. Following a calibration of an antenna, a recalibration of the antenna is triggered upon determining that a recalibration criterion is met. The determination is made based on monitoring a reported power level of a transmitted signal as measured by a stationary and/or mobile client device couple to the wireless network.

Abstract: Systems for synchronizing transmission through the introduction of a specific additional delay in a wireless telecommunications network are provided. RF transmission delays are adjusted for a distributed antenna system (DAS) that must maintain synchronization with RF transmissions in a macro cellular network. Delays are introduced at each DAS node using a delay panel or a measurement procedure to synchronize the transmission of the DAS with the macro cellular network.

Abstract: An interface circuit charges a rechargeable battery from a power source. A normally-closed relay with normally-closed switch contacts and a coil having a first end and a second end has its normally-closed switch contacts and the coil coupled in series between first and second input terminals. An EMF conduction diode is coupled between a fourth output terminal and a junction between the normally-closed switch contacts and the first end of the coil. The second end of the coil is coupled to a third output terminal. Current supplied from the power source energizes the coil and causes the normally-closed switch contacts to oscillate between an open condition and a closed condition. Energy transferred from the power source to an electromagnetic field of the coil when the normally-closed switch contacts are in the closed condition is transferred by discharging the electromagnetic field in response to current through the EMF conduction diode when the normally-closed switch contacts are in the open condition.

Abstract: A hydraulic displacement machine including two external gears located in the machine housing and meshing with each other, with the teeth of the two gears sealingly engaging the inner surface of the housing, and with meshing teeth of the two gears sealing the two port regions from each other, and an arrangement for communicating pressure prevailing in the port region of the housing having a higher pressure to the port region of the housing having a lower pressure over a circumference of each of the two gears.