Abstract: A method for radio source scheduling implemented in a communication network, the method comprising steps of establishing a connection between a baseband unit (BBU) and at least one transceiving device; transmitting, by the BBU, a plurality of downlink packets according to a downlink scheduling of the BBU; arranging each of the downlink packets to a plurality of transceiving devices; receiving, by the transceiving devices, the downlink packets and transmitting, by the transceiving devices, a plurality of uplink packets; and receiving the uplink packets, by the BBU, according to the downlink scheduling of the BBU.

Abstract: A tunable filter element comprises a resonator unit that defines a longitudinal axis, the resonator unit includes an inner conducting portion defining an inner shorting end along the longitudinal axis and an inner capacitive end opposing the inner shorting end, an outer conducting portion arranged around the inner conductor defining an outer shorting end along the longitudinal axis and an outer capacitive end opposite to the outer shorting end. The inner and the outer conductors maintain an annular gap there-between, and are coupled to form a shorting end at one end and a capacitive end at the other. The filter element further comprises a ferrite insert disposed between the inner and the outer conducting portions and substantially filling the annular gap, the ferrite insert being configured to receive a bias magnetic field in a direction substantially parallel to the longitudinal axis.

Abstract: A method of multipath compensation for digital pre-distortion (DPD) linearization suppresses linear distortion caused by reflected signals and distortion in transmitting and receiving paths. Reflection suppression suppresses effects of the linear distortion on the transmitting and receiving paths.

Abstract: A method of crest factor reduction using amplitude compression for multi carrier signals. Major elements of the inter-modulation distortion caused by amplitude suppression are removed to be outside of the desired signal band, and the peak amplitude is compressed, thus producing a signal with lower peak to average ratio for a required maximum error vector magnitude.

Abstract: A radio frequency transceiver includes a mixer circuit configured to convert an intermediate frequency signal into a radio frequency signal, a driver amplifier circuit configured to amplify the radio frequency signal from the mixer circuit, a temperature sensing circuit configured for sensing ambient temperature, and an attenuation circuit connected with the temperature sensing circuit, configured to decreasingly attenuate the radio frequency signal from the driver amplifier circuit as the ambient temperature increases.

Abstract: An angle adjustment apparatus for a dish antenna comprises a base, a first rotating frame, a second rotating frame, and a second rotation angle adjustment mechanism. The first rotating frame is fixed to the base, and can relatively rotate around the base with a first rotating angle. The second rotating frame is fixed to the first rotating frame, and can relatively rotate around the first rotating frame with a second rotating angle. The second rotation angle adjustment mechanism comprises a first screw rod, a screw nut post, and a second screw rod. One end of the first screw rod is fixed to the first rotating frame, and the other end is equipped with first threads and engaged with the screw nut post. One end of the second screw rod pivots on the second rotating frame, and the other end is equipped with second threads and engaged with the screw nut post. The first threads and second threads have different screw directions, or have the same screw direction but with different thread pitches.

Abstract: A dish antenna adjustment method is performed as follows. A dish antenna angle adjustment apparatus is provided; the dish antenna angle adjustment apparatus having a base member, a first rotation member and a second rotation member. The first rotation member is pivotally connected to the second rotation member, and rotates by a first rotation angle relative to the second rotation member. The second rotation member is pivotally connected to the base member, and rotates by a second rotation angle relative to the base member. A first rotating angle adjustment mechanism is connected to the angle adjustment apparatus of the dish antenna, e.g., the first rotating angle adjustment mechanism connects the first rotation member and the second rotation member. The first rotating angle adjustment mechanism adjusts the first rotation angle between the first and second rotation members.

Abstract: A low-noise block converter comprises a low-noise amplifier, a local oscillator, a mixer, an IF-amplifier and a regulator. The low-noise amplifier amplifies a high-band received signal. The local oscillator generates a local-frequency signal. The mixer transforms the high-band received signal into an intermediate-frequency signal by mixing the high-band received signal with the generated local-frequency signal. The IF-amplifier amplifies the intermediate-frequency signal. The regulator is connected to the IF-amplifier to provide a steady current (or voltage) to the local oscillator, the mixer and the low-noise amplifier.

Abstract: A band-pass filter comprises a first resonator, a second resonator and a third resonator. The second resonator is magnetically coupled to the first resonator. The third resonator is magnetically coupled to the second resonator and is electrically coupled to the first resonator. In addition, the first resonator is a quarter wavelength resonator, the second resonator is a half wavelength resonator, and the third resonator is a quarter wavelength resonator.

Abstract: A radio frequency transceiver includes a mixer circuit configured to convert an intermediate frequency signal into a radio frequency signal, a driver amplifier circuit configured to amplify the radio frequency signal from the mixer circuit, a temperature sensing circuit configured for sensing ambient temperature, and an attenuation circuit connected with the temperature sensing circuit, configured to decreasingly attenuate the radio frequency signal from the driver amplifier circuit as the ambient temperature increases.

Abstract: A radio frequency coaxial adaptor includes a housing having an end portion to engage a mating connector, a contact member mounted to the housing and moveable in a reciprocating manner relative to the housing, and a conductor coaxial with the housing and having a first end portion and a second end portion. The first end portion extends within the contact member, and the second end portion extends within the end portion of the housing for electrically engaging the mating connector.

Abstract: A system of satellite signal down conversion and reception comprises a low noise block down converter and a plurality of receivers. The low noise block down converter simultaneously and periodically sends a reference timing command to the plurality of receivers. Each of the plurality of receivers calibrates its timing based on the reference timing command to generate a plurality of data frames. Each of the data frames includes a plurality of time slots, and a time slot is designated to transmit data between the receiver and the low noise block down converter. Furthermore, each of the plurality of receivers uses a different time slot.

Abstract: An adjustable assembly apparatus includes a waveguide phase shifter and a waveguide multiplexer. The waveguide phase shifter has a first flange structure and the waveguide multiplexer has a second flange structure. The second flange structure and the first flange structure are embedded, and the polarization directions of the waveguide phase shifter and the waveguide multiplexer are orthogonal. In an embodiment, the first flange structure includes a bulge, the second flange structure includes a recess, and the bulge is embedded in the recess. The polarization directions of the bulge of the waveguide phase shifter and the recess of the waveguide multiplexer differ by 90 degrees.

Abstract: A waveguide includes a first waveguide member and a second waveguide member. The second waveguide member is combined with the first waveguide member to form a through hole. The first waveguide member includes a first shell and two first wing portions connected to the first shell, and the two first wing portions form a first plane. The second waveguide member includes a second shell and two second wing portions connected to the second shell, and the two second wing portions form a second plane. Bulged strips are formed at the inner rims of the second plane neighboring the through hole and extend along a longitudinal direction of the through hole, and the bulged strips protrude the second plane.

Abstract: A band pass filter combiner carrying a broadband signal with a central frequency comprises a power divider, a high pass band filter, a low pass band filter, and a power combiner. The distance from the signal input port of the power divider to each of signal input ports of the high pass band filter and the low pass band filter is equal to a quarter of the wavelength at the central frequency. The distance from each of signal output ports of the high pass band filter and the low pass band filter to the signal output port of the power combiner is also equal to a quarter of the wavelength at the central frequency.

Abstract: An assembly comprises a clamping mechanism and an LNB (low noise block down converter). The clamping mechanism includes a first clamping part, a second clamping part, and a plurality of rectangular grooves. The LNB includes a shell, at least one flexible portion, and at least one rib portion. The first clamping part and the second clamping part clasp around the LNB, and are combined with each other by at least one fastening part. The at least one flexible portion is disposed on the shell of the LNB, and the rib portion is on the flexible portion. The plurality of rectangular grooves are closely arranged in parallel on the inner surface of the second clamping part, and the rib portion is contained in one of the rectangular grooves. By rotating the combination of the first clamping part and the second clamping part, the rib portion is forced to move between the rectangular grooves and then is positioned again. During the movement, the flexible portion is temporarily deformed.

Abstract: A low noise block converter includes a first printed circuit board, a second printed circuit board, and a housing. The first printed circuit board includes a metal layer disposed on a surface of the first printed circuit board. The second printed circuit board includes at least one chip. The housing includes a support surface configured to support the first printed circuit board, and a cavity formed on the support surface and configured to receive the second printed circuit board, wherein the first printed circuit board is placed on the support surface with the metal layer facing the cavity for shielding the electromagnetic fields radiated from the at least one chip.

Abstract: A system and method for dynamic adjustment of drain or collector voltage of a power amplifier (PA), including a PA having a voltage input, a temperature sensor measuring ambient temperature of the PA, and an adaptive PA control processor that dynamically changes the input voltage based on the ambient temperature, achieving a desired peak power when the system is subjected to high temperatures. In a further embodiment, a power sensor measures output power of the PA, and the control processor dynamically changes the voltage based on output power when the system serves a large cell in a mobile communication infrastructure employing high power. In a further embodiment, a multistage PA and method include amplifier stages having drain or collector voltage inputs, wherein a voltage applied to the inputs are set so as to be proportional to the peak power requirements of each stage, enhancing overall efficiency.

Abstract: An out-door unit with multiple ports comprises a plurality of circuit blocks, a DC-DC converter and a plurality of ports. The DC-DC converter is configured to provide current to the plurality of circuit blocks. The plurality of ports is connected to a plurality of in-door units respectively via a diode and provides current from the plurality of in-door units to the DC-DC converter via a diode respectively. At least one of the plurality of ports is connected to a first circuit block of the plurality of circuit blocks to provide current to the first circuit block.

Abstract: A waveguide, configured to attach with a printed circuit board, includes a body, a waveguide channel, at least one flange portion, and a plurality of protrusions. The waveguide channel is formed through the body. The at least one flange portion is connected with an end portion of the body. The plurality of protrusions are disposed on a surface of the at least one flange portion and a surface of the end portion and abut against the surface of the printed circuit board.