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| Number | Title | Issue Date |
| 8150324 | Method and system for clipping a baseband input signal A method for clipping a baseband input signal filters the complex baseband input signal with a function H1 for forming a filtered first signal. To form a clipped signal in the baseband the filtered first signal is multiplied by a scaling factor. By a sign... | 04/03/2012 |
| 7551897 | Method and apparatus for performing transmit pre-emphasis A pre-emphasis circuit and methods are provided. The circuit includes a first amplifier and a second amplifier. The first amplifier contains M first driver cells and is operable to amplify a signal. The second amplifier contains P second driver cells and is operable... | 06/23/2009 |
| 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 |
| 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 |
| 7321785 | Eyeglasses with wireless audio capability A cellular telephone is used as a remote control device to control operations on the users nonportable computer which is remote location to the cellular telephone. The user can carry out various operations on the cellular telephone which cause the remote computer to... | 01/22/2008 |
| 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 |
| 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 |
| 7225135 | Signal-predictive audio transmission system Various methods and systems disclosed compand audio signals using signal prediction, followed by expansion and reconstruction. The methods and systems compress and expand an error signal that represents deviations between samples of the original signal and predicted... | 05/29/2007 |
| 7224739 | Controlled frequency signals In some embodiments, a transmitter includes first encoding controlled frequency output circuitry to creates a magnitude encoded controlled frequency signal (CFS) and second encoding controlled frequency output circuitry to create a complementary a magnitude encoded ... | 05/29/2007 |
| 7206337 | Bit stream conditioning circuit having output pre-emphasis A high-speed bit stream interface module interfaces a high-speed communication media to a communication Application Specific Integrated Circuit (ASIC) via a Printed Circuit Board (PCB). The high-speed bit stream interface includes a line side interface, a board side... | 04/17/2007 |
| 7155164 | Method and apparatus for performing transmit pre-emphasis A pre-emphasis circuit and methods are provided. The circuit includes a first amplifier and a second amplifier. The first amplifier is operable to amplify a signal using a first amplifier current, and the second amplifier is operable to amplify a delayed version of ... | 12/26/2006 |
| 7144290 | Discharge lamp with stabilized discharge vessel plate The invention relates to a new design of discharge vessel for a discharge lamp, in which dielectrically impeded discharges are to be generated. In this case, a discharge vessel plate 1, 9 is, as it were, of two-fold design, specifically as a first discharge v... | 12/05/2006 |
| 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 |
| 7085327 | Phasor fragmentation circuitry and method for processing modulated signals having non-constant envelopes An improvement for a phasor fragmentation engine and method, whereby a phasor flipping algorithm is applied when determining fragment phasors for a non-constant envelope modulation signal (e.g. OFDM). The phasor flipping algorithm avoids sharp phase transitions for ... | 08/01/2006 |
| 7068984 | Systems and methods for amplification of a communication signal Bandwidth reduction of amplitude and/or phase components of relatively wide bandwidth composite signal. In an exemplary embodiment, an EER amplifier system for CDMA signal amplification includes an amplitude bandwidth reduction module included in an amplitude signal... | 06/27/2006 |
| 7023897 | Transmission circuit A transmission circuit includes a baseband circuit, spreading section, multiplier, digital modulator, quadrature modulator, and antenna. The baseband circuit generates and outputs at least one transmission data constituted by first and second channel data. The sprea... | 04/04/2006 |
| 7010050 | Signaling over noisy channels The present invention relates to a system and method for signaling among a plurality of devices via a communication carrier over a noisy medium such as a power line and particularly relates to an innovative method and system for high speed signaling using an innovat... | 03/07/2006 |
| 6980593 | Wireless transmission-reception system The wireless transmission-reception system of the subject invention includes a transmitter and a receiver. The transmitter includes a compressor for compressing a signal to be transmitted and a pre-emphasis circuit for emphasizing an output signal of the compressor.... | 12/27/2005 |
| 6975517 | Embedded preemphasis and deemphasis circuits Exemplary techniques for providing an embedded preemphasis circuit and/or a deemphasis circuit in a printed circuit board (PCB) or other circuit device are disclosed. In particular, a technique for preemphasizing and/or deemphasizing transmitted signals in a PCB-bas... | 12/13/2005 |
| 6954119 | Cascaded arrangement of lower order filters and method of designing the same A passive filter arrangement and a method of providing such a filter is described. The frequency response of the filter arrangement is substantially the same as the frequency response of a first filter of an order having a first value, the frequency response of the ... | 10/11/2005 |
| 6937912 | Anti-aliased clipping by band-limited modulation with step functions A method for computing the “clippings” of an audio signal in the digital domain to prevent aliasing is disclosed. An offset signal is found by subtracting a threshold from samples of the audio signal. These are multiplied by a pulse after the pulse is lined up i... | 08/30/2005 |
| 6928170 | Wireless microphone having a split-band audio frequency companding system that provides improved noise reduction and sound quality A wireless microphone having a split-band audio frequency companding system is disclosed. The companding system includes a compression circuit in which one amplification element is utilized in connection with a number of frequency bands. Each frequency band has a re... | 08/09/2005 |
| 6882871 | Transfer connection device for wirelessly connecting mobile phone and hand-free handset A transfer connection device for wirelessly connecting mobile phone and hand-free handset has a first connector and a second connector to respectively couple with a hand-free handset and a mobile phone to allow signal transmission between the hand-free handset and m... | 04/19/2005 |
| 6834184 | Method for supplying reference data for a frequency update in a mobile station, mobile station, module of a mobile station and radio communications system The invention relates to a method for supplying reference data that is to be used in a mobile station of a radio communications network for a frequency update of the frequency used by the mobile station, which reference data is based on bursts received by the mobile... | 12/21/2004 |
| 6771708 | Nonlinear compensator A nonlinear compensator comprising a signal processing section, a distortion detecting section, and a distortion correcting section. The signal processing section detects the time difference and phase difference between two signals by calculating correlation, synchr... | 08/03/2004 |
| 6735264 | Compensation for non-linear distortion in a modem receiver A method and modem for communicating serial input data over a transmission link are disclosed. Serial input data is partitioned into parallel data elements prior to rotation by an invertible linear mapping. Computationally efficient multi-rate wavelet filter banks a... | 05/11/2004 |
| 6567988 | Video signal transmission apparatus and video signal transmission method In transmitting the analog video signal via a coaxial cable, a transmission apparatus side is not provided with an emphasis characteristic which is the inverse to the frequency attenuation characteristic of the coaxial cable. In stead, an emphasis is appl... | 05/20/2003 |
| 6487240 | Apparatus for receiving and recovering frequency shift keyed symbols A receiver architecture includes a selectivity filter (206) for selectively passing a wanted channel and rejecting unwanted channels. The selectivity filter has a filter BT of about one-half the BT of the transmitter filter. A discriminator (208) is coupl... | 11/26/2002 |
| 6477182 | Data transmission method and apparatus A method and apparatus for modulating a plurality of information signals onto respective unique intermediate frequency (IF) carrier signals, summing the respective IF carrier signals to provide a stacked IF carrier signal and upconverting the stacked IF c... | 11/05/2002 |
| 6434241 | Controlling the peak levels of the FM composite signal by half-cosine interpolation A method for controlling the peak levels of an FM composite signal is described. First, the FM signal is clipped to obtain an error signal. This signal comprises the "clippings" resulting from the clipping operation. Next, the peaks of the error signal ar... | 08/13/2002 |
| 6195537 | Method and apparatus for strong signal suppression in multi-carrier signals A block radio design is disclosed that prevents the primary analog-to-digital converter from saturating and thus prevents the introduction of intermodulation products into the multi-carrier signal. The block radio comprises a strong signal suppressor that... | 02/27/2001 |
| 6038430 | Method and apparatus for improving transmission of data in a wireless network A method and apparatus are provided that improve data transmissions in a wireless network, optimized for the transmissions of voice signals, by companding data signals electrically about a spectral shaping module in data handling devices, preferably modem... | 03/14/2000 |
| 5913152 | FM composite signal processor A signal processor for amplitude and frequency limiting of a multiplex FM composite signal is described. To maximize the amount of available bandwidth and minimize the generated distortion, the disclosed signal processor employs multiple low-distortion am... | 06/15/1999 |
| 5907584 | System and method for transmitting and receiving a Lincompex signal having information encoded thereon through angle modulation The system and method of the present invention include a modulator which encodes data on a communication signal using angle modulation. The demodulator, receiving the angle modulated communication signal, angle demodulates the angle modulated communicatio... | 05/25/1999 |
| 5878077 | Apparatus for high-speed simultaneous voice/data communications A high speed modem for simultaneously transmitting both voice and precoded digital data signals over a single communication channel. The modem is operable to combine a voice signal with a precoded digital data signal for transmission at high speeds, high ... | 03/02/1999 |
| 5729828 | Frequency processing circuit with lower sideband suppression and emphasis A frequency processing circuit has a suppressing circuit for suppressing a lower sideband wave of an input FM signal whose frequency is modulated, a frequency conversion circuit for converting the frequency of an output of the suppressing circuit, and an ... | 03/17/1998 |
| 5666659 | Method of and structure for increasing signal power over cellular link The clipper contained in the standard cellular transceiver used in cellular telephone networks is effectively prevented from having any effect on a signal by reducing the signal amplitude so that the signal which passes through the clipper does not activa... | 09/09/1997 |
| 5659317 | Apparatus for reproducing digital audio waveform data In a waveform data reproducing apparatus for a digital audio system, deterioration of sound quality is prevented by a digital audio waveform data reproducing apparatus which includes a digital preemphasis circuit 12 for digitally preemphasis-processing di... | 08/19/1997 |
| 5515013 | Fixed compromise equalization for a dual port FM modulator A dual port frequency modulator and method for eliminating the undesired affects caused by high port/low port phase differences in a standard dual port frequency modulator. The frequency modulator includes an inverse filter stage coupled to the input of a... | 05/07/1996 |
| 5507033 | Apparatus and method for increasing data transmission rate over wireless communication systems using spectral shaping A system and method for reducing amplitude distortion in a data signal transmitted through a cellular analog communication system is embodied in several forms. Each specific embodiment of the invention eliminates distortion caused by clipping or sluggish ... | 04/09/1996 |
