Systems and methods for transceiver communication are discussed herein. An exemplary system comprises a first transceiver unit comprising a first attenuator, a filter module, a gain module, and an antenna. The first attenuator may be configured to attenuate a transmission signal from a second transceiver module over a coaxial cable. The transmission signal may comprise a primary component and a triple transit component. The first attenuator may further be configured to attenuate and provide a reflection signal over the coaxial cable to the second transceiver module. The reflection signal may be based on a reflection of at least a portion of the transmission signal. The filter module configured to filter the transmission signal. The gain module may be configured to increase the gain of the transmission signal. The antenna may be configured to transmit the transmission signal.

Systems and methods for reduction of triple transit effects in transceiver communications

A method for calibrating an antenna array coupled to a plurality of transmitters via a plurality of couplers and a plurality of antenna element feeds is described. The method comprises, at a communication unit: selecting and coupling at least one coupler to a calibration receiver in a feedback path in the communication unit; scaling at least one first signal by at least one first beamform weight; applying the scaled at least one first signal to a first transmitter of the plurality of transmitters and routing the scaled at least one first signal via the selected at least one coupler to the calibration receiver; generating a reference signal by selecting and scaling the at least one first signal by at least one second beamform weight substantially equal to the at least one first beamform weight; comparing the at least one first signal scaled with the at least one first beamform weight with the at least one first signal reference signal scaled by the at least one second beamform weight to determine at least one first parameter result; storing the at least one first parameter result of the comparison associated with the first transmitter; repeating for subsequent transmitters the steps of selecting and coupling a further coupler, scaling, applying at least one further signal to a further transmitter of the plurality of transmitters, generating a further reference signal, comparing and storing at least one further parameter result until the plurality of couplers have been selected; and determining at least one calibration correction coefficient from a plurality of parameter results for applying to at least one second signal input to at least one transmitter of the plurality of transmitters coupled to the antenna array to substantially equalise a transfer function of a plurality of transmit paths to antenna element feeds for the at least one second signal having beamform weights applied thereto.

Communication unit and method of antenna array calibration

The object of the present invention is to provide an active antenna system which is flexibly configurable and efficient in operation. According to a first aspect of the present invention an active antenna system comprises a radio equipment having a plurality of transceiver modules, each transceiver module being connected to at least one antenna, and a radio equipment control unit having a hub being connected to the transceiver modules via an antenna interconnect. The hub is embodied for receiving base band signals via the antenna interconnect from the transceiver modules and to extract channel signals from the received base band signals. As the hub is arranged in the radio equipment control unit which is part of a base station the base band signals are transmitted to the radio equipment control unit without extracting the channel signals. This allows easily to distribute the base band signals on several data connections, particularly several antenna cables, of one antenna interconnect. This results in a reduced information loss and minimizes the requirements for the transmission capacity of a single data connection of the antenna interconnect between the radio equipment control unit and the radio equipment. The radio equipment control unit does receive all the information which is originally received by the transceiver modules.

Active antenna system

An active antenna test system is described. The active antenna test system comprises an active antenna unit comprising: a plurality of antenna elements; at least one processor; a plurality of transceiver modules operably coupled to the at least one processor and arranged to receive at least one first baseband signal for transmission via at least one of the plurality of antenna elements and arranged to pass at least one second baseband signal thereto received and down-converted from at least one of the plurality of antenna elements; and at least one switching module operably coupling the plurality of antenna modules to the plurality of transceiver modules. The active antenna test system also comprises at least one communication test equipment, such as a radio frequency, RF, test module and at least one baseband processor. The active antenna unit further comprises at least one externally connectable radio frequency, RF, test port operably coupled to the at least one switching module and arranged to externally couple the at least one communication test equipment to at least one of the plurality of transceiver modules for conductive testing.

Active antenna system and methods of testing

A wireless communication method and system utilizing optical transmission technology to transport analog signals directly to/from the antenna, without ADC/DAC, so that the optical transport facility can be utilized more efficiently and there is no need to adapt the digital data rate to the transport capacity, as the analog transmission is independent of the digits buried in the given spectrum. Complicated operation is moved into a centralized location, so that a cell site (base station) is light and flexible. In contrast, the standardized approach in the industry, which involves digitized interface between the antenna and the control processor, hits capacity limits of the current transport technology.

Method and system for wireless transmission of analog signals between antenna and baseband processor

Active antenna, base station, method for refreshing amplitude and phases and signal processing method

An active antenna, a base station, a method for refreshing the amplitude and phase, and a signal processing method are disclosed to simplify the structure of a phase shifter and guarantee the reliability of the phase shifter. The active antenna or the base station includes an antenna dipole array, a transceiver array, a digital processing unit (DPU), and a transceiving calibration unit. During signal reception, the transceiver demodulates a radio frequency (RF) signal of the antenna dipole into an IQ analog signal, and outputs the IQ analog signal to the DPU; the DPU converts the demodulated IQ analog signal into an IQ digital signal, and performs digital beam forming (DBF) on the IQ digital signal according to the transceiving calibration unit; during signal transmission, the transceiver modulates the IQ analog signal of the DPU into an RF signal, and outputs the RF signal to the antenna dipole; the DPU converts a signal of a base band unit (BBU) into an IQ digital signal in serial/parallel (S/P) mode, and performs DBF on the IQ digital signal according to the transceiving calibration unit.

Active antenna, base station, method for refreshing amplitudes and phases, and method for processing signals

Implementations of the present invention disclose an active antenna, a base station, a method for updating amplitude, phase and delay and a method for signal processing, in order to solve the problem that phase-shifting network has complex structure and is unreliable. Said active antenna or base station includes an antenna element array, a transceiver unit array, a digital processing unit and a transceiver adjusting unit. When receiving signal, the transceiver unit carries out down conversion demodulation for radio frequency signal from antenna element to produce IQ analog signal, which is outputted to said digital processing unit, and the digital processing unit converts the down conversion demodulated IQ analog signal into IQ digital signal, and carries out digital beam forming for the IQ digital signal based on transceiver adjusting unit; When transmitting signal, the transceiver unit carries out up conversion modulation for IQ analog signal from digital processing unit to produce radio frequency signal, which is outputted to antenna element, and the digital processing unit carries out serial/parallel conversion for the signal from base band unit to produce IQ digital signal, and carries out digital beam forming for the IQ digital signal based on the transceiver adjusting unit.

Active antenna, base station, method for updating amplitude and phase and method for signal processing

Method for improving insulation of antennas, system and device

An embodiment of the invention discloses an active antenna, a magnitude and phase refreshing method and a signal processing method which are used for solving the problem that a phase-shift network is complex in structure and unreliable The active antenna comprises an antenna element array, a transceiver unit array and a digital processing unit, wherein the antenna element array comprises an antenna element and is used for converting electromagnetic wave signals and radio-frequency signals, the transceiver unit array comprises a transceiver unit which is used for demodulating down-conversion of radio-frequency signals into IQ analog signals in receiving signals and outputting the IQ analog signals to the digital processing unit, and the digital processing unit is used for converting the IQ analog signals of down-conversion demodulation into IQ digital signals in receiving signals and carrying out digital beam forming on the IQ digital signals

Jianjun Chen

Papers

Active antenna, base station, method for refreshing amplitude and phases and signal processing method

Active antenna, base station, method for refreshing amplitudes and phases, and method for processing signals

Active antenna, base station, method for updating amplitude and phase and method for signal processing

Method for improving insulation of antennas, system and device

Active antenna, magnitude and phase refreshing method and signal processing method