摘要:
Methods and systems for mitigating a voltage standing wave ratio in a transmitter are disclosed and may comprise calibrating an output power of a power amplifier integrated within a chip using a resistor that models an impedance of an antenna that is externally coupled to the amplifier while the antenna is decoupled. The gain and output power of the amplifier may be determined utilizing the known resistance and a voltage that is measured at an input of the power amplifier, or at a number of points prior to the power amplifier. When the antenna may be coupled to the transmitter, the transmitter output power may then be controlled utilizing the voltage measurements prior to the power amplifier to avoid measuring reflected waves in instances when the antenna impedance may vary. The power amplifier may be of a design that comprises reverse isolation to reduce reflected waves from the antenna.
摘要:
Certain aspects of a method and system for mitigating effects of pulling in multiple phase locked loops in multi-standard systems may include selecting an input frequency range of operation at a voltage controlled oscillator based on a particular wireless band of operation in a system that handles a first wireless communication protocol and a second wireless communication protocol. An image rejection mixer may be enabled to generate an output signal for the particular wireless band of operation based on mixing a plurality of received signals within a selected frequency range. An in-phase (I) component and a quadrature (Q) component of the generated output signal may be generated by utilizing a RC-CR quadrature network.
摘要:
Aspects of a method and system for processing signals in a high performance receive chain may include amplifying radio frequency signals in amplifier chains in a multistandard radio frequency front-end, comprising one or more shared processing stages, and combining, with substantially equal gain, a number of phase-shifted radio frequency signals of the radio frequency signals into substantially equal-gain-combined radio frequency signals. The substantially equal-gain-combined radio frequency signals may be demodulated to obtain inphase channels and quadrature channels. A number of inphase channels and quadrature channels may be processed in I-channel processing blocks and Q-channel processing blocks to generate an output analog baseband signal. The multistandard radio frequency front-end may be capable of processing Bluetooth® signals and Wireless Local Area Network (WLAN) signals. The amplifier chains may comprise a first amplifier and a second amplifier, where the first amplifier may be shared between Bluetooth® signal processing paths and WLAN signal processing paths.
摘要:
Aspects of a method and system for enhancing efficiency by modulating power amplifier (PA) gain are presented. Aspects of the system may comprise a PA gain modulator that enables modification of an amplitude of a digital baseband signal. A baseband processor may enable computation of a first gain value based on the modification. The baseband processor may enable computation of a second gain value based on the first gain value. A PA may enable generation of an RF output signal based on the modified digital baseband signal and the second gain value.
摘要:
A mobile communication device with a low power receiver for signal detection and a method for utilizing a low power receiver for signal detection in a mobile communication device. Various aspects of the present invention comprise a first receiver module adapted to operate in a sleep mode. The first receiver module may also be adapted to receive a communication signal utilizing a first amount of power, where the communication signal is characterized by a first set of signal characteristics. A second receiver module may be adapted to receive a communication signal characterized by the first set of signal characteristics. The second receiver module may be adapted to receive a communication signal utilizing a second amount of power that is less than the first amount of power. A communication signal received by the second receiver module may be analyzed to determine a mode in which to operate the first receiver module.
摘要:
An offset cancellation scheme in which offset cancellation current is sourced into one differential branch of a driver circuit and sinked from the opposite differential branch. The source/sink arrangement allows for offset cancellation current to be introduced into the circuit, but the overall total average current remains substantially unchanged. When used in an I and Q mixer circuits, the offsets may be canceled without generating an I/Q imbalance in the I and Q mixers.
摘要:
Aspects of a method and system for a highly efficient power amplifier (PA) utilizing dynamic biasing and predistortion are presented. Aspects of the system may include a processor that enables computation of a value of a variable bias component of a bias current based on a bias slope value and an amplitude of an envelope input signal. The processor may enable computation of a value of the bias current based on the selected constant bias current component value and the variable bias current component value. A PA may enable generation of an output signal in response to a generated baseband signal by utilizing the bias current to amplify an amplifier input signal. The bias current may be generated based on the envelope input signal. A feedback signal may be generated based on the output signal, which may be used to predistort a subsequent baseband signal.
摘要:
A Wireless mobile communication (WMC) device may be utilized to tag data generated and/or maintained in the WMC device with positional information. Positional information may comprise location and/or directional attributes. Positional attributes may be derived from operations, application, and/or accessory devices. Positional information of tagged data may be utilized to subsequently control the WMC device wherein operations may be performed and/or predicted in said WMC device based on match between current positional information of the WMC device and positional information of tagged data. User preference information and/or biometric data may be utilizing in tagging data with positional information and/or in utilizing positional data for controlling the WMC device. A remote device may be utilized for performing tagging operations, and/or storage of user preference information.
摘要:
A system and method is provided for a wireless mobile communication device (WMCD) to communicate a signal that may include user preference data to execute a function and/or receive a service in one or more identified remote transmitting/receiving (TX/RX) devices. The signal may be encrypted, and may be used to poll the availability and identity of the one or more remote TX/RX devices. The user preference data may be formatted in a standardized universal language with commands understandable by most remote TX/RX devices for rendering functions or services. If the one or more remote TX/RX devices receive competing and/or conflicting user preference data from a plurality of WMCDs, each of the remote TX/RX devices may arbitrate which function or service to perform according to privileges of each of the user preference data of the respective WMCDs or based on an arbitration decision in the one or more remote TX/RX devices.
摘要:
Methods and systems for a handheld portable communication device for configuring connection to and use of local and remote resources are disclosed and may include discovering available networks and resources, establishing a route between the handheld wireless communication device and a selected one or more of the available resources via a selected one or more of the available networks based on user preference criteria stored in the handheld wireless communication device, and communicating multimedia data between the handheld wireless communication device and the selected one or more of the available resources via the established route. The established route may be dynamically adjusted, based on network availability and bandwidth. The handheld wireless communication device may communicate utilizing a plurality of wireless protocols. The preference criteria stored in the handheld wireless communication device may be dynamically adjusted. The resources may be local or remote to the handheld wireless communication device.