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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7876852 | Modulator device for generating an optical transfer signal modulated by binary signal According to the invention, a very narrow-band transfer signal (LS) is generated by serially connecting a frequency modulator (2) and an amplitude modulator (4). The frequency modulator (2) is operated at a modulation index which at least largel... | 01/25/2011 |
| 7697627 | FM transmitter for portable electronic device having rotary encoder A rotary encoder is used to select a transmission frequency for an FM transmitter associated with a portable electronic device such as a cellular telephone, MP3 player or other portable type electronic device. The rotary encoder is turned in a clockwise or countercl... | 04/13/2010 |
| 7653144 | Gaussian FSK modulation with more than two modulation states A wireless data transmission system uses modulation onto a multi-level symbol, so that a multi-level frequency shifted signal can be generated. By using a Gaussian filter, inter-symbol interference can be introduced. The demodulation process makes use of templates c... | 01/26/2010 |
| 7643571 | Wireless communication system and method A communication system including a first device transmitting a modulated signal and a second device receiving the modulated signal. The second device can include a first demodulator and a second demodulator. The first demodulator can receive the modulated signal, pr... | 01/05/2010 |
| 7457370 | Frequency staggered frequency shift keying modulation A frequency modulation method is proposed that enables an imprinting of a digital message formed by a sequence of symbols on a set of frequency bands. Each symbol of the digital message is hereby assigned just one symbol value out of a defined set of symbol values. ... | 11/25/2008 |
| 7436263 | Apparatus and method for presenting a modulated output signal at an output locus An apparatus that presents an output signal that is modulated by input signal includes: (a) A signal source providing a signal at a reference frequency. (b) A frequency comparer coupled with the signal source and the output signal for comparing the extant output sig... | 10/14/2008 |
| 7433418 | Method and apparatus for efficient storage of training sequences for peak to average power constrained modulation formats Some embodiments store a training sequence in a communications system. The stored training sequence exhibits certain desirable characteristics when used by a peak to average power constrained modulation format. In one embodiment, a set of original ordered sequences ... | 10/07/2008 |
| 7421252 | Center frequency control of an integrated phase rotator band-pass filter using VCO coarse trim bits A phase rotator for a Cartesian feedback power amplifier in a transmitter final stage contains an integrated voltage controlled tunable resonant circuit accomplishing band-pass filtering at a center frequency selected by local oscillator (LO) coarse trim control sig... | 09/02/2008 |
| 7394869 | RF transmitter architecture for continuous switching between modulation modes The present invention provides a radio transmitter having a digital modulator that further includes logic for continuous amplitude and continuous phase modulation switching in an RF transmitter intended to support both frequency shift keying (FSK) and phase shift ke... | 07/01/2008 |
| 7394862 | Multi-mode wireless polar transmitter architecture A radio transmitter within a transceiver includes a digital processor and analog circuitry for modulating and transmitting an outgoing digital signal in multiple modes of operation. The digital processor digitally modulates the outgoing digital signal to produce one... | 07/01/2008 |
| 7372914 | Control system methods and apparatus for inductive communication across an isolation barrier Improved control apparatus and methods transfer information between devices, such as controllers and field devices, utilizing a modulator that generates a pulse width modulated (PWM) signal containing information to be transferred by a first of the devices, e.g., th... | 05/13/2008 |
| 7366151 | Hierarchical data collection network supporting packetized voice communications among wireless terminals and telephones A packet-based, hierarchical communication system, arranged in a spanning tree configuration, is described in which wired and wireless communication networks exhibiting substantially different characteristics are employed in an overall scheme to link portable or mob... | 04/29/2008 |
| RE40254 | Method and system for realising a fast control channel in a cellular radio network Signalling information is conveyed from a transmitting device (101) to a receiving device (102) in a cellular radio network where user data transmission takes place on a traffic channel in discrete transmission bursts (111-120; 211-220... | 04/22/2008 |
| 7363399 | Method, apparatus and computer program product providing storage network dynamic tuning of I/O flow with Queue Depth In accordance with a computer program product, apparatus and a method there is provided a redundant network wherein a host computer operates with a plurality of storage devices by monitoring conditions of the multipath storage network and controlling a storage multi... | 04/22/2008 |
| 7349488 | Frequency shift keying signaling for integrated circuits The present invention relates to a system for communicating between two integrated circuits (ICs) or within an IC. The ICs are either on the same circuit boards or on different circuit boards with a common backplane. A first integrated circuit has transmitter circui... | 03/25/2008 |
| 7342984 | Counting clock cycles over the duration of a first character and using a remainder value to determine when to sample a bit of a second character In an auto baud system and method, the baud rates between two communicating devices are synchronized by timing the transmission of a plurality of bits by counting the cycles of a reference clock. The number of cycles counted is then divided by the number of bits cou... | 03/11/2008 |
| 7330693 | Broadcast channels for wireless telephony A wireless system and method for providing informative broadcast services includes a plurality of base stations, each serving a plurality of wireless communications device users via a plurality of communications channels. An alert message is first transmitted to wir... | 02/12/2008 |
| 7317696 | Method for in-band signaling of data over digital wireless telecommunications networks An inband signaling modern communicates digital data over a voice channel of a wireless telecommunications networks. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The ... | 01/08/2008 |
| 7298788 | Wireless communication system and method A communication system including a first device transmitting a modulated signal and a second device receiving the modulated signal. The second device can include a first demodulator and a second demodulator. The first demodulator can receive the modulated signal, pr... | 11/20/2007 |
| 7292645 | Binary transmitter and method of transmitting data in binary format The present invention provides a binary transmitter. In one embodiment, the binary transmitter includes a data coder that receives and encodes binary data to be transmitted and a modulator that employs the binary data directly to modulate a carrier wave to yield a s... | 11/06/2007 |
| 7283580 | Spread spectrum meter reading system utilizing low-speed/high-power frequency hopping A spread spectrum meter reading system enables the use of high power frequency hopping spread spectrum (HPSS) transmissions at both the encoder transmitter and repeater levels of the meter reading system. A plurality of end point encoder transmitter devices are each... | 10/16/2007 |
| 7269233 | Algorithm of bit synchronization for a digital FSK correlation receiver An algorithm for bit synchronization in a frequency shift keying (FSK) receiver. In the algorithm, a training sequence is received from a transmitter. The training sequence has a plurality of bits. A starting point of a next bit received by the FSK receiver after th... | 09/11/2007 |
| 7269228 | Non-coherent frequency shift keying transmitter using a digital interpolation synthesizer A non-coherent frequency shift keying transmitter for up-converting a baseband signal to a radio frequency signal is provided. The non-coherent frequency shift keying transmitter applies the interpolation method in a digital frequency synthesizer to replace the conv... | 09/11/2007 |
| 7263137 | Multivalued FSK modulation system A multivalued FSK modulation system is provided in which when data to be transmitted is multivalued and transmitted/received, the detection level is different every symbol. When a two-valued signal is transmitted as one symbol, data (11), (01), (00) and (10) are pre... | 08/28/2007 |
| 7245930 | Acquisition mechanism for a mobile satellite system A method for enabling synchronization of a communications terminal in a wireless communication system, and a corresponding acquisition system of the communications terminal, wherein the method consists of the steps of: receiving a burst at a receiver of the communic... | 07/17/2007 |
| 7245725 | Dual processor framer A dual processor framer includes a receiver and a transmitter which share common circuitry and/or code. Separate direct memory access controllers may be used for each of the receiver and transmitter. Processing is distributed over two or more processors. One process... | 07/17/2007 |
| 7239675 | GFSK receiver A method for synchronizing a receiver to a stream of transmitted symbols that includes a known synchronization word. The method includes receiving a signal in which the symbols, including the synchronization word, are encoded by frequency shift keying. The signal is... | 07/03/2007 |
| 7236765 | Data communication over power lines A system for receiving and processing signals received from a plurality of endpoints. Each endpoint includes an endpoint transmitter in electrical communication with a power distribution line within a power distribution system. The system comprises a power line coup... | 06/26/2007 |
| 7230549 | Method and system for synchronizing bit streams for PCI express devices A PCI Express device is provided. The PCI Express device includes a symbol lock module that includes a state machine for detecting a special character in a serial bit stream received from a serial/de-serializer, wherein the state machine receives a first special cha... | 06/12/2007 |
| 7230997 | Semiconductor integrated circuit for communication, radio-communications apparatus, and transmission starting method In a polar loop based radio-communications apparatus having a phase control loop for controlling the phase of a carrier outputted from an oscillator for transmission, and an amplitude control loop for controlling the amplitude of a transmission output signal outputt... | 06/12/2007 |
| 7228154 | Method and system for processing wireless digital multimedia A transmit digital processing system for wireless transmission of HDMI and/or DVI data using an FPGA. The FPGA converts the data into two data streams and includes a front end component multiplexing video data with control data. A complementary receive FPGA is also ... | 06/05/2007 |
| 7221669 | Cellular telephone having improved in-band signaling for data communications over digital wireless telecommunications networks An inband signaling modem communicates digital data over a voice channel of a wireless telecommunications network. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The di... | 05/22/2007 |
| 7215965 | Facility and method for wireless transmission of location data in a voice channel of a digital wireless telecommunications network A wireless communication facility and method employs a mobile unit having a number of alternative modes of digital wireless communication. The unit may be a battery pack or other accessory device attachable to a wireless telephone handset. The mobile unit is operate... | 05/08/2007 |
| 7206305 | Software code for improved in-band signaling for data communications over digital wireless telecommunications networks An inband signaling modem communicates digital data over a voice channel of a wireless telecommunications network. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The di... | 04/17/2007 |
| 7203465 | Receiver/transmitter circuit A receiver/transmitter circuit includes an antenna terminal, a transmitter circuit which outputs a transmission signal in response to a transmit control signal, a receiver circuit which receives a reception signal from the antenna terminal, and a waveform control ci... | 04/10/2007 |
| 7180412 | Power line communication system having time server A system for bi-directional power distribution line communication. The system is configured for data communication with an endpoint transceiver located at a customer premise. The system comprises a time server in electrical communication with the transceiver, the ti... | 02/20/2007 |
| 7159230 | Emergency alert system A system for inputting conventional emergency alert messages into a digital subscriber television system. The method allows existing emergency alert equipment to interface with the digital system equipment in the headend of a digital subscriber television system. A ... | 01/02/2007 |
| 7145438 | Endpoint event processing system An endpoint processor includes a processor block, a timer block, a memory block, and analog-to-digital converter. The timer block is arranged to provide a time based signal to the processor block. The memory block cooperates with the processor block. The analog-to-d... | 12/05/2006 |
| 7127006 | Method for transmitting frames comprising bursts modulated with different modulation schemes on radio communication channel The invention relates notably to a method for transmitting frames on a radio communication channel (RCC), the frames comprising a succession of bursts (B1, . . . , Bn) modulated with at least two different modulation schemes (M1, M2, M3) ... | 10/24/2006 |
| 7123665 | Method and apparatus for measuring phase error of a modulated signal A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase preemphasis coefficients for compensating the frequency conversion gain of the... | 10/17/2006 |
