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| Number | Title | Issue Date |
| 7570919 | Transmitter, receiver, and radio communications system and method Transmitter and receiver for wireless communications with improved accuracy and stability in radio frequency control. A transmitter mixes an information-carrying signal (first signal) and a non-modulated wave signal (second signal) with a carrier signal, thereby pro... | 08/04/2009 |
| 7463862 | Methods and apparatus to integrate image rejection into quadrature mixers Methods and apparatus to integrate image rejection into quadrature mixers are disclosed. A disclosed image-rejection quadrature mixer comprises a quadrature mixer, and a cross-coupled differential pair of transistors to provide a complex filter response, wherein the... | 12/09/2008 |
| 7398056 | Channel estimation applique for multiple antenna wireless communications Multiple antenna wireless communication systems require accurate knowledge of the transfer function between all paths. This invention discloses a system wherein a test signal generator at a transmitter station and a facsimile generator at a receiver station go throu... | 07/08/2008 |
| 7392018 | Channel estimation applique for wireless communications A test signal generator at a transmitter station and a facsimile generator at a receiver station go through an acquisition and tracking process which aligns the two signals, removing errors in the time base of generation, the frequency offset of generation and the t... | 06/24/2008 |
| 7376173 | Unambiguously encoding and decoding signals for wireless channels A method encodes a sequence of blocks of input bits to be transmitted over a wireless channel. Each block of input bits is converted to a codeword, and each codeword is mapped to multiple sub-blocks of complex numbers. Each sub-block is multiplied by a disambiguatin... | 05/20/2008 |
| 7366485 | Multimode wireless transmitter and a portable wireless device using the same The circuits of a multimode wireless transmitter are complex and large, and thus difficult to incorporate in a portable wireless device. This problem is solved for a multimode wireless transmitter by enabling the first frequency mode circuit and the second frequency... | 04/29/2008 |
| 7359671 | Multiple channel wireless communication system A wireless audio distribution system may have a wireless transmitter, responsive to a plurality of audio input channels, for transmitting signals carrying the audio, a receiver, responsive to the transmitted signals for selecting one or more of the audio input chann... | 04/15/2008 |
| 7356343 | Emergency location transceivers (ELT) Emergency Location Transceivers (ELT) and communication transceivers (transmitters and receivers) for reception and demodulation of location finder signals, Global Positioning System (GPS) satellite signals and non GPS satellite location finder and other location fi... | 04/08/2008 |
| 7343015 | Method and apparatus for high fidelity wireless stereophonic transmission utilizing dual frequency carriers A method and system is disclosed for transmitting two related channels of signals through the air. A first channel of signals is modulated with a first carrier frequency, and a second channel of signals is modulated with a second carrier frequency. The modulated fir... | 03/11/2008 |
| 7338328 | Cigarette lighter adapter device that interfaces with an external device via a port interface A CLA device comprises a CLA plug that is insertable into an external CLA socket, for example, a DC CLA socket inside a vehicle. The CLA device has a housing coupled to the CLA plug, for example, by integration or via a tethered wire, with the housing having a suppo... | 03/04/2008 |
| 7330451 | Code division multiple access communication system and method Disclosed is a CDMA communication system and method that make it possible to accommodate a greater number of user terminals that can be connected per facilities investment. Ternary phase-shift keying (TPSK) modulation is applied as primary modulation in a CDMA commu... | 02/12/2008 |
| 7327777 | Method and apparatus for distributed polyphase spread spectrum communications Methods and apparatus are provided for distributed polyphase spread spectrum communication and non-contiguous spectrum underlay. The method includes polyphase channelizing a direct sequence spread spectrum (DSSS) signal, determining available spectrum in an observed... | 02/05/2008 |
| 7324833 | System and method for connecting a portable audio player to an automobile sound system An audio system and method are disclosed. A system incorporating teachings of the present disclosure may include, for example, an electronic device having a display, a memory, an audio file player, and a housing component at least partially defining a cavity in whic... | 01/29/2008 |
| 7324798 | 2-order sub-harmonic frequency modulator having high carrier suppression ratio and direct conversion transmitter using the same Disclosed herein is a 2N-order sub-harmonic frequency modulator and direct conversion transmitter using the same. The direct conversion transmitter includes a digital modulation unit, a D/A conversion unit, a DC correction and low pass filter unit, a loca... | 01/29/2008 |
| 7321578 | Multiprotocol WLAN access point devices The embodiment of the present invention comprises a device-internal data flow organization coupled with a wireless communications medium access control protocol for a set of WLAN “Multiprotocol Devices”, each containing a 2.4 and 5 GHz frequency band-agile CCK a... | 01/22/2008 |
| 7315729 | Wireless transmitter for use in a vehicle A connecting device comprises a first power plug for connecting to a power output port of a vehicle, a second power plug for connecting to a power input port on an electronic device, at least one signal plug for connecting to at least one signal output port of the e... | 01/01/2008 |
| 7308104 | Forward multiple scrambling code generating method and apparatus Disclosed are a forward multiple scrambling code generating method and apparatus in a communication system. Each base station uses primary scrambling codes and an associated one of secondary scrambling code sets, each consisting of a plurality of secondary scramblin... | 12/11/2007 |
| 7305257 | Portable alerter for wireless device The present invention is a remove-able portable alerter for a portable wireless communication host device. The alerter provides a method to receive un-obtrusive alerts from the host device informing the user of incoming notifications. Users are informed of alerts wi... | 12/04/2007 |
| 7295809 | Portable audio playback device with bass enhancement Wirelessly linking a portable audio device to an external audio system permits the external audio system to generate audible signals that enhance local playback of audio by the portable device. For example, the portable device wirelessly transmits lower frequency co... | 11/13/2007 |
| 7293276 | Interactive television program guide for recording enhanced video content Interactive television systems and methods are provided for enhancing program guide content using recording and alert features for video related to promotions, advertisements, and other selectable displays presented in an interactive television application such as a... | 11/06/2007 |
| 7280802 | FM transmitter and power supply/charging assembly for MP3 player An FM transmitter and power supply/charging assembly electrically coupleable with an MP3 player. The assembly includes a modular docking unit having a main body portion with a docking cavity therein, wherein the main body portion contains the FM transmitter and powe... | 10/09/2007 |
| 7272358 | Channelization scheme for wireless local area networks A four channel wireless network channelization scheme is described that is particularly usable in the ISM frequency band between 2400 MHz and 2483.5 MHz. The preferred channelization scheme permits access points to be set at one of four frequencies in the ISM band, ... | 09/18/2007 |
| 7263713 | Television signal distributor apparatus, receiver apparatus, television signal transmission system and method In a television signal transmission system, CS broadcasting signals received via a master antenna are converted into intermediate frequency signals in an LNB (Low Noise Block Down Converter). The CS intermediate frequency signals then undergo conversion of the modul... | 08/28/2007 |
| 7260361 | Locating interfering devices in wireless networks using channel adaptation metrics A method, apparatus and system relate to detecting an interfering device in a wireless network such as a wireless local area network (WLAN). In wireless networks using orthogonal frequency division multiplexing (OFDM) and adaptive bit loading (ABL), adaptive modulat... | 08/21/2007 |
| 7257050 | Through tubing real time downhole wireless gauge A telemetry system having: a pipe; a SCADA box acoustically coupled to the pipe; and a gauge inserted in the pipe, the gauge comprising: an acoustic wave generator; a coupler mechanically connected to the acoustic wave generator, wherein the coupler is engageable an... | 08/14/2007 |
| 7251459 | Dual frequency band wireless LAN A dual band radio is constructed using a primary and secondary transceiver. The primary transceiver is a complete radio that is operational in a stand alone configuration. The secondary transceiver is a not a complete radio and is configured to re-use components suc... | 07/31/2007 |
| 7242906 | FM transmitter and power supply/charging assembly for MP3 player An FM transmitter and power supply/charging assembly electrically coupleable with an MP3 player. The assembly includes a modular docking unit having a main body portion with a docking cavity therein, wherein the main body portion contains the FM transmitter and powe... | 07/10/2007 |
| 7239846 | Up-conversion modulation loop for multi-mode mobile communication The present invention relates to a signal modulation loop for the multi-mode mobile communication. The adaptive up-conversion modulation loop is applied in the multi-mode mobile communication, and is used for signal integration for the communication system comprisin... | 07/03/2007 |
| 7233769 | Multiple channel wireless communication system A wireless audio distribution system may include a wireless transmitter transmititing an encoded digital bitstream serially combining each of a plurality of audio input channels and control data, a wireless receiver receiving the transmitted bitstream, a manual sele... | 06/19/2007 |
| 7231266 | Digital control device and program A digital control device for tracking a sine wave according to the present invention has a compensator, a control object and a feedback gain. An input into the compensator is a signal obtained by subtracting a control quantity from a reference value. An input into t... | 06/12/2007 |
| 7221727 | All-digital phase modulator/demodulator using multi-phase clocks and digital PLL Multi-phase clocks are used to encode and decode signals that are phase-modulated. The input signal is phase-compared with a feedback clock. Phase differences increment or decrement an up/down counter. The count value from the up/down counter is applied to a phase r... | 05/22/2007 |
| 7221911 | Multi-band ultra-wide band communication method and system The present invention provides ultra-wide band communication systems and methods, including multi-band ultra-wide band communication systems and methods. Methods and systems are provided in which frequency sub-bands of an ultra-wide band spectrum are allocated for s... | 05/22/2007 |
| 7212787 | Wireless audio transmission system A wireless audio transmission and reception system includes a pulse width amplifier, an up-converter, a transmitter, a receiver, a down-converter, an integrator, and a power amplifier to transfer an analog signal to a transducer such as a speaker. The pulse width am... | 05/01/2007 |
| 7209746 | Apparatus and method for wireless video and audio transmission utilizing a minute-power level wave The present invention is to provide an inexpensive transmission apparatus which has the function of receiving standard television broadcasting, uses a minute-power wave, and is able to coexist with future digital television broadcasting or mobile communication equip... | 04/24/2007 |
| 7194753 | System and method for efficiently tuning to channels of a variety of different broadcast types A tuning system is described that is capable of receiving a number of different broadcast types such as analog or digital satellite, cable, Internet, and terrestrial airwave broadcasts. The tuning system stores service records, each service recording containing info... | 03/20/2007 |
| 7187716 | Vehicle mounted DSRC apparatus A vehicle mounted DSRC apparatus is capable of achieving reduction in the size and cost thereof. The vehicle mounted DSRC apparatus includes an ASK data generation part 11, an I data generation part 21, a Q data generation part 22, a first band ... | 03/06/2007 |
| 7181165 | Local wireless audio signal RF transmitter and receiver having a single downconverter without need for IF carrier A local wireless system for transmitting a modulated RF carrier audio signal from a base unit to a receiver unit is provided. The base unit has a pair of audio input connections of which are coupled to an audio source amplification device for receiving left and righ... | 02/20/2007 |
| 7171184 | Method and apparatus for a gain controlled mixer A gain controlled mixer for an integrated CMOS transceiver. Accuracy of the controlled gain may be relatively invariant over temperature, manufacturing process, and other variations attendant to circuit realizations in a CMOS transceiver, and other realizations. A p... | 01/30/2007 |
| 7170828 | Removable face plate compressed digital music player This invention comprises a two part audio system in which all of the processing power is allocated to a small, lightweight satellite part that is the face unit. Mass storage, amplification, and wired power for recharging the face unit is provided by the other part, ... | 01/30/2007 |
| 7167691 | Transmission diversity method in mobile communication system Disclosed is a transmission diversity method in a mobile communication system, by which optimal transmission diversity can be provided in case that a base station of the mobile communication system uses at least one transmitting antenna. The present invention includ... | 01/23/2007 |