Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Application No. | Application Title | Issue Date |
| 20110287736 | METHODS FOR IN-BAND SIGNALING THROUGH ENHANCED VARIABLE-RATE CODECS Improvements are disclosed for in-band signaling, i.e., transmission of data in a voice channel of a digital wireless network during a voice call session. A family of narrow-band signaling methods, some employing tapered waveforms, is disclosed to successfully pass data... | 11/24/2011 |
| 20110129034 | FSK SIGNAL MODULATOR FOR PRODUCING A BINARY FSK SIGNAL An FSK signal modulator is provided in a transmitter which receives desired information to be transmitted on its input and which modulates the information to be transmitted to transmit a binary FSK signal. A counter counts a value of addition with the value of addition ... | 06/02/2011 |
| 20100246719 | APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL AND METHOD OF TRANSMITTING AND RECEIVING A SIGNAL A method for transmitting and receiving a signal and an apparatus for transmitting and receiving a signal are disclosed. The method for receiving the signal includes receiving (S210) the signal in a first frequency band, identifying (S220) a first pilot si... | 09/30/2010 |
| 20100246718 | STTC Encoder for Single Antenna WAVE Transceivers An encoder in a transmitter uses space-time trellis coding. An input bitstream is multiplexed to produce in parallel a set of output bitstreams. A multiplier applies a code generating weight to each output bitstream, which are combined, mapped and transmitted by a singl... | 09/30/2010 |
| 20100052869 | COMBINATION FULL-DUPLEX AND HALF-DUPLEX ELECTRONIC IDENTIFICATION TAG Transponders are disclosed that are configurable to operate in an HDX mode and/or an FDX-B mode and that use a switchable load impedance across the transponders' resonant antenna circuit to induce amplitude and/or frequency modulation. An RF level detection circuit dete... | 03/04/2010 |
| 20090268847 | PHASE LOCKED LOOP MODULATOR CALIBRATION TECHNIQUES A method for calibrating a phase locked loop begins by determining a gain offset of a voltage controlled oscillator of the phase locked loop. The processing then continues by adjusting current of a charge pump of the phase locked loop based on the gain offset.... | 10/29/2009 |
| 20090193309 | DEVICE AND METHOD FOR CORRECTING A DATA ERROR IN COMMUNICATION PATH There are provided a transmission and reception device having a function for correcting a data error in a communication path. In the transmission device, a redundant bit addition unit adds a redundant bit to each data bit which has been divided by one bit by a division ... | 07/30/2009 |
| 20090168857 | MICRO-CONTROLLER WITH FSK MODEM A micro-controller to perform the FSK (HART) modem functions as well as communications and control functions in an isolated channel implementation is described. In one embodiment, the micro-controller comprises: a processor, an analog-to-digital converter configured to ... | 07/02/2009 |
| 20090154597 | Linear and Non-Linear Dual Mode Transmitter A transmitter includes a dual mode modulator and an amplifier coupled to the dual mode modulator. The dual mode modulator implements a linear modulation scheme during a first mode of the modulator to produce a variable envelope modulated signal. The dual mode modulator ... | 06/18/2009 |
| 20080253480 | Continuously Variable Phase Frequency Shift Keying Method for modulating an RF signal includes the steps of modulating an RF signal using frequency shift keying (FSK) modulation to define a plurality of symbols (2030, 2031). The FSK modulation includes transitioning the modulated sign... | 10/16/2008 |
| 20080175336 | Communication system, transmitter, communication method, and transmitter detection method Disclosed is a communication system, having: a transmitter including: a first frequency converter converting a frequency of a provided signal to a first frequency band to generate a first signal and converting the frequency of the provided signal to a second frequency b... | 07/24/2008 |
| 20080152038 | System and method for data communication A data communication system includes a terminal identification information adding unit generating a unit carrier wave including a predetermined plurality of periods of carrier waves and arranging the unit carrier wave in arrangement patterns differing at every transmiss... | 06/26/2008 |
| 20070211825 | GFSK/FSK Modulation Circuit and Related Method Implemented in A Digital Manner A Gaussian Frequency Shift Keying/Frequency Shift Keying (GFSK/FSK) modulation circuit implemented in a digital manner comprises a frequency divider for dividing frequency of an inputted clock signal to get a sampling signal, a buffer coupled to the frequency divider fo... | 09/13/2007 |
| 20070147544 | FSK signal modulator for producing a binary FSK signal An FSK signal modulator is provided in a transmitter which receives desired information to be transmitted on its input and which modulates the information to be transmitted to transmit a binary FSK signal. A counter counts a value of addition with the value of addition ... | 06/28/2007 |
| 20070098111 | Frequency offset and method of offsetting A transmitter digital signal processor (DSP) circuit has a transmit frequency represented by n-bit data output from a look up table (LUT). The n-bit data is outputted to an n-bit accumulator structured to overflow at a rate based on the output n-bit data to output a pha... | 05/03/2007 |
| 20070076817 | System and method for transmitting/receiving signal in a frequency overlay communication system A method for transmitting a signal by a transmitter in a frequency overlay communication system. The method includes generating y first signal groups by shuffling input information data with a length yN on an N-by-N grouping basis according to a first shuffling scheme; ... | 04/05/2007 |
| 20070053465 | Apparatus and method for performing ranging in a communication system A ranging apparatus in a communication system is provided. A terminal generates a ranging code for ranging with a base station, maps the ranging code to at least one sub-carrier so the ranging code is repeated in a time domain, generates a ranging signal so the mapped r... | 03/08/2007 |
| 20060176978 | FSK signal generator An FSK signal generator includes a first clock generator which generates a first clock pulse having a frequency n·f1, a second clock generator which generates a second clock pulse having a frequency n·f2, a switch which serves so as to output the first o... | 08/10/2006 |
| 20060146957 | FSK signal generator An FSK signal generator comprises a pulse generator which generates a first clock pulse of a frequency n, a second clock pulse of a frequency n/2, and a square wave pulse of a frequency n/2, a first bandpass filter which outputs a first carrier signal of a frequency n b... | 07/06/2006 |
| 20060098761 | Multi-mode transmitter A radio frequency module (500) that uses reconfigurable and reprogrammable hardware to generate and condition RF signals that have one of several selectable modulation formats. A modulation controller (316) selects a selected modulation format from a plura... | 05/11/2006 |
| 20060062325 | Digital algorithm for on-line ACPR optimization in polar RF transmitters An RF transmitter includes a digital processor that includes a time shift signal determination block that produces a time shift signal based upon a bleed over power level in an adjacent channel resulting from downstream phase and magnitude mismatch of a primary signal. ... | 03/23/2006 |
| 20050265479 | Transmitter and transmission control method A transmitter has a peak reducing part carrying out peak reduction processing; an OFDM signal generating part generating an OFDM signal from an input information signal; a cyclic shifting part generating a signal obtained from cyclically shifting the OFDM signal; and an... | 12/01/2005 |
| 20050243948 | Frequency shift keying modulator and applications thereof An FSK modulator and applications thereof are disclosed. The FSK modulator comprises a phase-locked loop, a frequency divider module, an image rejection mixer and a summing module. The phase-locked loop is operably coupled to generate a first oscillation from a referenc... | 11/03/2005 |
| 20050226348 | 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. Acco... | 10/13/2005 |
| 20050207511 | Meethod and system for communicating data over a wireless communication system voice channel utilizing frame gaps The present invention provides a method for communicating data over a voice channel of a wireless communication system. The method includes receiving a first periodic data signal and modulating the first periodic data signal to produce a second periodic data signal. Mod... | 09/22/2005 |
| 20050157816 | Circuit and method for binary modulation A binary FSK modulator circuit is composed of a signal mapping circuit, a D/A converter circuit, and a quadrature modulator circuit. The signal mapping circuit generates I data and Q data through signal mapping in response to an input bit stream, the I data being repres... | 07/21/2005 |
| 20050105643 | Gaussian fsk modulation with more than two modulation states A wireless data transmission system 1) uses modulation onto a multi-level symbol 11), so that a multi-level frequency shifted signal can be generated 14). By using a Gaussian filter 13), inter-symbol interference can be introduced. The demodu... | 05/19/2005 |
| 20050047523 | [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 conventi... | 03/03/2005 |
| 20050036567 | Voltage controlled oscillator (VCO) suitable for use in frequency shift keying (FSK) system A voltage controlled oscillator (VCO), suitable for use in a frequency shift keying (FSK) system. The VCO device comprises a switching varactor unit, having a first terminal and a second terminal, wherein the switching varactor unit produces a capacitance, according to ... | 02/17/2005 |
