Abstract: The use of the STTD is enabled in a network so that the common channels (CPICH etc.) do not need to be transmitted using transmit diversity, but the STTD can be enabled only for channels having dedicated pilots and which are intended for the UEs supporting this functionality. Other UEs not supporting transmit diversity can use the common channels as usual. In normal transmit diversity operation the UE will use the CPICH transmitted from both antennas as a phase reference. In the proposed method some of the common channels including CPICH are transmitted without transmit diversity even though the STTD is used on channels having dedicated pilots and which are intended for the UEs supporting this functionality.

Abstract: An apparatus for removing a DC offset during frequency direct conversion in a reception device of a wireless communication system. In the apparatus, an adder receives a digital baseband signal comprising a DC component, receives an estimated DC offset value, and calculates a difference between the digital baseband signal with the DC component and the estimated DC offset value. A DC offset calculator receives gain mode information of an analog element of the reception device, and calculates the estimated DC offset value according to the gain mode.

Abstract: A method and system are provided in which a user is enabled to create a preferred playlist of the user's favorite songs. An input device allows the user to add and/or delete songs from this preferred playlist. In an exemplary embodiment, songs playing on several radio stations are monitored and when a song from the user's favorites list begins to play on a station other than the station to which the user is currently tuned, an audio and/or visual signal is provided to alert the user, and the user may change stations manually or tune to the new station automatically.

Abstract: In RF transceivers, a method and system for using phase shift key (PSK) sync word for fine tuning frequency adjustment are provided. One aspect of the invention provides for adjusting a local oscillator frequency in a radio frequency (RF) receiver when a residual DC offset remains after a coarse frequency offset adjustment if performed. The fine adjustment may be necessary because of the synchronization required with a PSK-based modulated portion of a Bluetooth packet. A residual phase shift detected in a sync sequence portion of the Bluetooth packet may be utilized to determine a residual or fine frequency adjustment. This approach may allow an RF receiver to operate, in some instances, without the need for an equalizer. In this regard, the power consumed by the RF receiver may be minimized and/or the overall cost of the RF receiver may be reduced.

Abstract: Methods and apparatus are provided for gain and phase compensation in a radio frequency (RF) transmitter (108). The RF transmitter (108) has at least one power amplifier (PA) (205) for providing a transmitted signal having a signal power therefrom. An RF power detector (208) is coupled to the at least one PA (205) for detecting the signal power of the transmitted signal and an analog to digital (A/D) converter (210) is coupled to the RF power detector (208). A hysteresis unit (214) is coupled to the A/D converter (210) for generating a pulse (222) in response to a power threshold being crossed and a load switch control unit (218, 232) is coupled to the hysteresis unit and the at least one power amplifier for providing gain and phase compensation in response to the pulse.

Abstract: The present invention provides a modular headset operable to support both voice communications and voice activated commands. This may involve the use of multiple voice CODECs to process voice communications and voice activated commands. The modular headset includes both a microphone and wireless earpiece. The earpiece may further include an interface, a processing circuit, a speaker, a user interface, a pairing circuit, and a registration circuit. The interface allows the earpiece to communicate with the base unit that couples the modular headset to a servicing network. This coupling to the servicing network and base unit only occurs when the headset is successfully registered to the base unit. The pairing circuit and registration circuit allow the exchange of pairing or registration information between various components. The pairing circuit allows the wireless earpiece and microphone to exchange pairing information which is then compared to determine whether or not a successful pairing can be achieved.

Abstract: A wireless communication device for minimizing electromagnetic interference with hearing aid devices. The wireless communication device comprises a lower housing (112, 312, 412, 512, 612) and an upper housing (114, 314, 414, 514, 514) adjacent to the lower housing. The lower housing (112, 312, 412, 512, 612) supports a wireless transceiver (108, 202) capable of producing an electromagnetic field, and the upper housing includes an ear piece (104, 504, 604). For one embodiment the upper housing (114, 314, 514, 614) and all components supported by the upper housing consist of non-electromagnetic conductive material. For other embodiments, all electromagnetic conductive components of the upper housing (414, 514, 614) are restricted to an area adjacent to an ear piece (104, 504, 604) of the upper housing.

Abstract: The present invention discloses a dual-band active filter having filtering response and positive pass-band gain. The dual-band active filter includes an input match unit for gain match of the dual-band active filter and for having a band-pass filtering response; a first gain stage electrically connected to the first input match unit for providing the flat gain of the dual-band active filter; an inter-stage unit electrically connected to the first gain stage for matching gain and for having a band-stop filter response; a second gain stage electrically connected to the inter stage unit for providing the flat gain of the dual-band active filter; and an output unit electrically connected to the second gain stage for matching the dual-band active filter and for having a low-pass filtering response.

Abstract: A method for implementing a wireless radio frequency (RF) module on a motherboard is described. First, the whole wireless RF module is formed on a daughter board, and at least one through hole is formed at or near the edge of the daughter board. Finally, the daughter board is mounted in the motherboard by a method such as surface mount design (SMD), and the through hole is filled with a conductive material to connect circuits on the daughter board and the motherboard to each other.

Abstract: A device reduces the dynamic range of a signal at a first point along a signal processing direction in a transmitter of a communication system. The device includes an input to which an input signal is applied, a correction prediction device, a delay device, an addition device, and an output. The correction prediction device generates a predictive signal based on the input signal which represents the prediction of the signal at the first point, and generates a correction signal from the predictive signal. The delay device generates an input signal delayed by a delay from the input signal, the delay taking into consideration the processing time in the correction prediction device. The addition device subtracts the correction signal from the delayed input signal in order to generate a corrected signal. The output provides the corrected signal at a second point in front of the first point.

Abstract: A phase locked loop includes a detection module, a control conversion module, a controlled oscillation module, a divider module, and a power distribution module. The detection module is operably coupled to produce a difference signal based on a difference between a reference oscillation and a feedback oscillation. The control conversion module is operably coupled to convert the difference signal into a control signal. The controlled oscillation module is operably coupled to produce an output oscillation based on the control signal. The divider module is operably coupled to produce the feedback oscillation based on the output oscillation. The power distribution module is operably coupled to receive a supply voltage and to provide an individual supply voltage to at least one of the detection module, the control conversion module, the controlled oscillation module, and the divider module to optimize at least one of performance and power consumption of the phase locked loop.

Abstract: A radio frequency (RF) phase shifter having an RC-CR circuit that includes a first capacitor having a first capacitor node and a second capacitor node and a first resistor coupled between the first capacitor node and a ground. The RC-CR circuit also includes a second resistor having a first resistor node and a second resistor node and a second capacitor coupled between the first resistor node and the ground. The RF phase shifter generates arbitrary phase shift by using a scheme of adding two perpendicular vectors with variable gains (or amplitudes).

Abstract: A system is provided for correcting an output power of a power amplifier in a transmit chain of a mobile terminal. In one embodiment, the system includes output power correction circuitry that corrects the output power of the power amplifier during ramp-up for a transmit burst. The output power of the power amplifier is controlled based on a power control signal, which is provided by combining an amplitude component of a modulated signal and a corrected ramping signal provided by the output power correction circuitry. In general, a power amplifier ramp generator provides a ramping signal. The ramping signal is converted to a desired output power signal, which is subtracted from a detected output power signal to provide an error signal. The error signal is integrated to provide an adjustment signal, which is combined with an ideal ramping signal to provide the corrected ramping signal.

Abstract: Techniques for facilitating and reducing the costs associated with the installation of a wireless broadband communications system. In one mode of operation, the system employs a first transceiver to identify n channels having the n lowest levels of noise and interference associated therewith by a spectrum management technique. Next, the first transceiver transmits a predetermined code over the n channels to a second transceiver, which attempts to identify the predetermined code within a captured transmission. In the event the code is correctly identified, the second transceiver measures a noise and/or interference level associated with the corresponding channels. The channel having the lowest measured noise and interference level is then selected for use in system installation.

Abstract: In one embodiment, the disclosure relates to a method and apparatus for inter-chip wireless communication system. The system includes a first microprocessor having a plurality of non-contact ports and a first RF communication circuit integrated with the first microprocessor; a second microprocessor also having a plurality of non-contact ports and a second RF communication circuit integrated therein. An RF communication protocol can be configured to receive data from each of the non-contact ports in parallel, multiplex and translate the data to a serial RF signal. Data communication can be accomplished using the wireless communication circuit on each chip. The RF communication between the first and the second integrated circuits using the communication protocol defines a non capacitive-coupling of the first and the second die.

Abstract: A wireless broadband communications system that increases data throughput and link availability through more efficient use of the electromagnetic spectrum allocated to the system. In one mode of operation, the system periodically measures a noise or interference level associated with each one of a plurality of communications channels, and generates a histogram of the measurements associated with each channel. Next, the system determines a noise/interference level estimate for each channel as a predetermined percentile of the histogram associated with the respective channel. The system then selects a respective one of the channels having the lowest noise/interference level estimate for subsequent signal transmission.

Abstract: In an RF communication system, aspects for supporting cellular or wireless network and broadcast utilizing an integrated single chip cellular and broadcast silicon solution may comprise receiving in a mobile terminal, a plurality of cellular frequency band communications services and VHF/UHF band broadcast services in a single baseband processor IC within a mobile terminal. Cellular information associated with the cellular frequency band communications service, and VHF/UHF broadcast information associated with the VHF/UHF broadcast service may be processed by a cellular processing module and a VHF/UHF broadcast processing module, respectively, integrated within a single integrated circuit within the mobile terminal. The cellular processing module and the VHF/UHF broadcast processing module within the mobile terminal may operate independently of each other to separately process the cellular information and the VHF/UHF broadcast information without exchanging related information.

Abstract: A foldable cellular phone includes a first housing, a first protruding portion, a second housing, and a second protruding portion. The first housing includes a first hinge part, the first protruding portion being disposed on the first hinge part. The second housing includes a second hinge part, the second protruding portion being disposed in the second hinge part. The first hinge part and the second hinge part couple with each other as a hinge. When the second housing rotates around the hinge relatively to the first housing, the second protruding portion corresponding to the first protruding portion is capable of acting as a stopper to stop the movement of the first protruding portion. Subsequently, the second housing is in a flip position with a predetermined maximum angle.

Abstract: Time signals for controlling a radio clock are transmitted by a transmitter and received by a receiver as amplitude modulated time signals, formed of a multitude of time frames. Each time frame has a constant duration. These time signals are first automatically amplified. A so-called telegram of at least one received time signal is stored in a memory. At least one change of an amplitude of a time signal is determined in advance or predetermined and such amplitude change has a duration that is longer than a given or determined duration (?t). When a predetermined amplitude change begins the automatic amplification is locked-in. The present circuit arrangement for operating a radio-controlled clock is equipped with components for performing the foregoing operations.

Abstract: A DC offset cancel circuit includes an analog adder 1 to whose one input a baseband analog signal output from a high-frequency reception section is input and to whose other input an analog correction signal output from a D/A converter 7 is input, and which corrects the reference voltage value of the baseband analog signal analogically to cancel a DC offset, an adder 3 which has the output of the A/D converter 2 as its one input and subtracts the lower bits of a sample value stored in a memory 6 to be described later as a DC offset value from the input value and outputs the resultant value, a control circuit 5 which outputs an output digital value of the A/D converter 2 as a sample value to the memory 6, and a D/A converter 7 which converts a digital value of the upper bits of a sample value stored in the memory 6 to an analog correction signal and outputs the analog correction signal to the analog adder 1.