106 results about "Transceiver architecture" patented technology

A network for wireless transmission of data includes a source access point, a destination device and a plurality of wireless repeaters that provide a transmission link between the source access point and the destination device. The plurality of access points each includes a single transceiver with separate transmitter and receiver sections operable to simultaneously transmit and receive data on different frequency channels. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Exemplary embodiments of system and method are provided for measuring signal amplitude, phase and / or delay offsets between multiple transmit signals fed through the transmit signal processing chains and wirelessly transmitted over the transceive antennas of separate transceiver modules, wherein transmit signal coupling between the transmit antennas of said transceiver modules' transmit signal processing chains may be used for synchronizing the transmit signals and calibrating their amplitude, phase and / or delay parameters. The exemplary embodiments further provide a front end arrangement of a wireless transceiver device which can comprise at least two independently controllable transceiver modules, each connected to an associated spatial diversity transceive antenna and comprising at least one associated transmit signal processing chain and at least one associated receive signal processing chain coupled to a common baseband processing unit. The exemplary transceiver architecture can be executed on an antenna loop between the transmit signal processing chain of a first transceiver module and the transmit signal processing chain of a second transceiver over the air interface and relies on an adaptive antenna concept which facilitates a wireless transmission of data via a plurality of wireless communication channels utilizing an array of transceive antennas, receiving feedback information via at least one of said communication channels using such antenna loop and modifying a transmission mode based on the received feedback information.

A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.

A system for wireless communications includes a tower structure supporting at least one transmit antenna at an elevated position on the tower structure and base electronics positioned proximate a base of the tower structure. The base electronics are coupled with the transmit antenna and include an initial stage amplifier for amplifying an input signal to provide a low power transmission signal that is provided to the transmit antenna at the elevated position.A final stage amplifier is positioned proximate the transmit antenna. The final stage amplifier is a high efficiency amplifier for efficiently amplifying the low power transmission signal from the base electronics to provide a high power transmission signal to be transmitted from the transmit antenna.

A free-space communication transceiver includes a telescope for transmitting and receiving laser beams, a tunable laser transmitter for generating a transmit laser beam modulated with data, a tunable optical receiver for processing a receive laser beam received from the telescope to recover data, and a tunable beamsplitter that directs the transmit laser beam to the telescope and directs the receive laser beam from the telescope to the optical receiver. Between the telescope and beamsplitter, the transmit and receive laser beams travel along a common optical axis as collinear collimated free-space beams. The transmit and receive laser beams operate at different wavelengths that can be interchanged, thereby support full-duplex operation. The beamsplitter employs a tunable etalon filter whose wavelength-dependent transmission characteristics are adjusted according to the transmit and receive wavelengths. Optionally, RF signals can additionally be couple to the common optical axis and transmitted and received by the telescope.

A network for wireless transmission of data includes a source access point, a destination device and a plurality of wireless repeaters that provide a transmission link between the source access point and the destination device. The plurality of access points each includes a single transceiver with separate transmitter and receiver sections operable to simultaneously transmit and receive data on different frequency channels. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Embodiments of cognitive radio technology can recover and utilize under-utilized portions of statically-allocated radio-frequency spectrum. A plurality of sensing methods can be employed. Transmission power control can be responsive to adjacent channel measurements. Digital pre-distortion techniques can enhance performance. Embodiments of a high DNR transceiver architecture can be employed.

In communication device comprising a plurality of distributed transceivers and one or more corresponding antenna arrays, a first distributed transceiver is configured to receive signals comprising one or more first data streams and a second distributed transceiver is configured to receive signals comprising one or more second data streams. One or more components within a transmit processing chain of the first distributed transceiver and / or one or more components within a transmit processing chain of the second distributed transceiver are adjusted to maximize beamforming gain for the one or more first data streams and / or second data streams. A phase of the one or more first data streams and / or the one or more second data streams may be adjusted by the one or more components within a transmit processing chain of the first distributed transceiver and / or the one or more components within a transmit processing chain of the second distributed transceiver.

A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.

Methods, systems, and devices are described for transceiver architecture for millimeter wave wireless communications. A device may include two transceiver chip modules configured to communicate in different frequency ranges. The first transceiver chip module may include a baseband sub-module, a first radio frequency front end (RFFE) component and associated antenna array. The second transceiver chip module may include a second RFFE component and associated antenna array. The second transceiver chip module may be separate from the first transceiver chip module. The second transceiver chip module may be electrically coupled to the baseband sub-module of the first transceiver chip module.

Exemplary embodiments of system and method are provided for measuring signal amplitude, phase and / or delay offsets between multiple transmit signals fed through the transmit signal processing chains and wirelessly transmitted over the transceive antennas of separate transceiver modules, wherein transmit signal coupling between the transmit antennas of said transceiver modules' transmit signal processing chains may be used for synchronizing the transmit signals and calibrating their amplitude, phase and / or delay parameters. The exemplary embodiments further provide a front end arrangement of a wireless transceiver device which can comprise at least two independently controllable transceiver modules, each connected to an associated spatial diversity transceive antenna and comprising at least one associated transmit signal processing chain and at least one associated receive signal processing chain coupled to a common baseband processing unit. The exemplary transceiver architecture can be executed on an antenna loop between the transmit signal processing chain of a first transceiver module and the transmit signal processing chain of a second transceiver over the air interface and relies on an adaptive antenna concept which facilitates a wireless transmission of data via a plurality of wireless communication channels utilizing an array of transceive antennas, receiving feedback information via at least one of said communication channels using such antenna loop and modifying a transmission mode based on the received feedback information.

In communication device comprising a plurality of distributed transceivers and one or more corresponding antenna arrays, a first distributed transceiver is configured to receive signals comprising one or more first data streams and a second distributed transceiver is configured to receive signals comprising one or more second data streams. One or more components within a transmit processing chain of the first distributed transceiver and / or one or more components within a transmit processing chain of the second distributed transceiver are adjusted to maximize beamforming gain for the one or more first data streams and / or second data streams. A phase of the one or more first data streams and / or the one or more second data streams may be adjusted by the one or more components within a transmit processing chain of the first distributed transceiver and / or the one or more components within a transmit processing chain of the second distributed transceiver.

The present invention relates to a radio front end transceiver and methods of operating the transceiver. A transceiver is employed consisting of a first and second receive path and a first and second transmit path. Each first path and second path can handle signals of a first and a second modulation format and a first and a second radio frequency band respectively. The transceiver comprises circuitry for conversion between the respective radio frequency bands and an intermediate frequency. The transceiver is arranged with intermediate frequency circuitry for conversion between the respective intermediate frequencies and basebands. At least some of the intermediate frequency circuitry is common to both receive paths and at least some of the intermediate frequency circuitry is common to both transmit paths. A frequency synthesizer is arranged to derive overlapping local oscillator frequencies suitable for use by the intermediate frequency circuitry on each of the paths.

A free-space communication transceiver includes a telescope for transmitting and receiving laser beams, a tunable laser transmitter for generating a transmit laser beam modulated with data, a tunable optical receiver for processing a receive laser beam received from the telescope to recover data, and a tunable beamsplitter that directs the transmit laser beam to the telescope and directs the receive laser beam from the telescope to the optical receiver. Between the telescope and beamsplitter, the transmit and receive laser beams travel along a common optical axis as collinear collimated free-space beams. The transmit and receive laser beams operate at different wavelengths that can be interchanged, thereby support full-duplex operation. The beamsplitter employs a tunable etalon filter whose wavelength-dependent transmission characteristics are adjusted according to the transmit and receive wavelengths. Optionally, RF signals can additionally be couple to the common optical axis and transmitted and received by the telescope.

The present invention provides cost-effective synthesizer and transceiver architecture having an instant channel switching for multiple wireless / wire network communication standards such as IEEE802.11 ab / g, Bluetooth, WCDMA, GSM QuadBand, CDMA dualband, GPS. This invention also enables multiple communication standards or multiple channels in one standard share the same fundamental frequency generators. This allows for a method of operating the transceiver and synthesizer, methods and apparatus of establishing or reestablishing a instant or simultaneously channel switching lock condition in a communication standard or among different communication standards.

A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.

The present invention relates to a dual band transceiver architecture for wireless communication. A high frequency integrated circuit is used for converting down the received multi-mode frequency signal, and then a decoding circuit for base frequency will perform the processes of up-sampling and emitting a signal so as to transmit / receive the dual band signal by using a single frequency synthesizer.

Two multi-rate transmission schemes, multi-code (MC) and variable-spreading-length (VSL) code, for realizing multimedia communications on three types of OFDM-CDMA systems are proposed. These systems can be integrated into a programmable structure such that the operation can be controlled and adjusted by system parameters and thus the transceiver can be used in different systems without changing the fundamental hardware and software architecture, which serves the trend of software-radio for future application. A transceiver architecture of multi-rate OFDM-CDMA systems is illustrated and showed its programmability such that the general system can operate under different scenarios with a common hardware structure and reconfigure by software implementation.

A network for wireless transmission of data includes a source access point, a destination device and a plurality of wireless repeaters that provide a transmission link between the source access point and the destination device. The plurality of access points each includes a single transceiver with separate transmitter and receiver sections operable to simultaneously transmit and receive data on different frequency channels. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

A communication system includes a conversion module configured to convert a signal between a radio frequency baseband (RF-BB) and an intermediate frequency (IF). At least one RF front-end module converts the signal between the IF and a radio frequency (RF). The RF front-end module is configured as an RF phased array and includes a coaxial interconnect configured to connect the conversion module with the RF front-end module. The signal is transmitted between the conversion module and the RF-front end module via the coaxial interconnect. At least one RF front-end module includes an active front-end (AFE) configured to allow the signal to be transmitted via the coaxial interconnect while minimizing any deterioration of the signal.

A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.

A single chip GSM / EDGE transceiver comprises a fully differential receive chain, a subharmonic mixer in the receive chain, the subharmonic mixer configured to receive a radio frequency (RF) input signal and a local oscillator (LO) signal that is phase-shifted by a nominal 45 degrees, and a synthesizer having a voltage controlled oscillator and having at least one frequency divider to generate desired transmit and receive LO signals. The transceiver also comprises a transmitter having a closed power control loop, and a harmonic rejection modulator, the use thereof made possible by a frequency plan designed to allow the synthesizer to develop the transmit and receive LO signals without a frequency multiplier.

A GaAs E-Band transceiver front-end chip set is provided comprising three MMIC devices. The first device includes a circuit for receiving data at baseband, mixing the data with an LO signal having an E-Band frequency, and transmitting a resultant data stream at an upconverted E-Band frequency; a circuit for receiving data having an E-Band frequency, mixing the received data with an LO signal having an E-Band frequency, and downconverting the resultant mixed received signal to an IF; and a circuit for dividing a received LO signal at an E-Band frequency and communicating the LO signal to the transmission and receiver circuits. The second device comprises a circuit for receiving an LO signal at a reference frequency, and multiplying the LO signal to an E-Band frequency. The third device comprises a circuit for mixing the mixed received IF signal with an LO signal, and downconverting the resultant mixed received signal to a baseband frequency, and a circuit for generating an LO signal, communicating the LO signal to the second device, coupling the LO signal, dividing the coupled LO signal, and communicating the divided LO signal to the second downconversion circuit. The first and second devices may be manufactured by a p-HEMT process and the third device is manufactured by a MESFET process. Additionally, an E-Band communications system is provided which utilizes the aforementioned chip set.

Transceiver architecture includes circuitry and a method to transmit and receive high speed WAP data over lower speed cabling such as Cat5e. The method begins by measuring quality of a wired bi-directional communications channel. The method continues by selecting a maximum possible data transmission rate over the wired bi-directional communications channel for the measured quality level and when the maximum possible data transmission rate is a reduced data transmission rate less than a maximum data transmission rate of the transceivers, proportionally adjusting clock rates of circuit elements of the first and second transceiver to transfer the data at the reduced data transmission rate. The method includes dividing data frames of the data to be transmitted N times, where N=number of layers of at least a portion of identical transceiver processing circuitry which is connected to twisted wiring pairs of the wired bi-directional communications channel.

One or more configurable transceivers can be fabricated on an integrated circuit. The transceivers contain various components having options that can be configured by turning configuration memory cells on or off. The integrated circuit may also contain programmable fabric. Other components in the transceivers can have options that are controlled by the programmable fabric. The integrated circuit may also contain one or more processor cores. The processor core and the transceivers can be connected by a plurality of signal paths that pass through the programmable fabric.

A method for a closed power control feedback loop allows a single portable transceiver architecture to be used for systems in which a transmit signal including both a phase modulated (PM) component and an amplitude modulated (AM) component are supplied to a power amplifier and in systems in which the transmit signal has only a PM component supplied to a power amplifier. By injecting the inverse of the AM portion of the desired transmit signal into the closed power control feedback loop, the feedback loop will not cancel the AM portion of the signal, thus allowing a system where both a PM component and an AM component of the transmit signal are present at the output of the power amplifier to function using a closed power control feedback loop.

A transceiver is described. The transceiver includes a first injection-locked oscillator and a second injection-locked oscillator. The transceiver also includes a first phase-locked loop coupled with the first injection-locked oscillator. The first phase-locked loop is configured to generate a first frequency reference. Further, the transceiver includes a second phase-locked loop coupled the second injection-locked oscillator. The second phase-locked loop is configured to generate a second frequency reference. The transceiver includes a mixer configured to receive the first phase-locked loop output and configured to receive said second injection-locked oscillator output. The mixer is also configured to generate a carrier frequency signal based on the first injection-locked oscillator output and the second injection-locked oscillator output. And, the transceiver includes a modulator configured to receive said carrier frequency signal.

A path sharing transceiver array architecture is disclosed. A plurality of channels are linked to antennas of an array for transmitting and receiving wireless signals that are offset in one of phase or time relative to one another. Each channel is associated with a delay element. In the receiving case, an offset signal is received at a first channel, processed, and shifted by a first delay element. The resulting signal is combined with the processed signal of a second, adjacent channel where a phase or time delayed signal is received. The combined signal is then shifted by a second delay element to produce a net signal. The first delay element is used to generate a shifted signal for both the first and second channel. The architecture can be extended to another number of channels.