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| Number | Title | Issue Date |
| 8170504 | Modified preamble for programmable transmitter A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may comprise transmitting the communication link over one or more antennas. Ge... | 05/01/2012 |
| 7974591 | Modified preamble for programmable transmitter A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may comprise transmitting the communication link over one or more antennas. Ge... | 07/05/2011 |
| 7957705 | System and method for reducing radio frequency interference caused by a carrier A base station (BS) and method to reduce RF interference by a carrier. The BS includes a first power amplifier (PA) that emits a first carrier, a second PA that emits a second carrier, a processor, and data storage containing program instructions. The BS is operable... | 06/07/2011 |
| 7558537 | Modified preamble for programmable transmitter A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may comprise transmitting the communication link over one or more antennas. Ge... | 07/07/2009 |
| 7480493 | Bit detection using code spectrum transform techniques for interference cancellation Spreading code detection methods applying autoregressive spectrum estimation (ARSE) techniques to code division multiple access (CDMA) wireless communication systems allowing the subscriber device to estimate the other users' codes. According to one aspect, ARSE tec... | 01/20/2009 |
| 7394754 | System and method for transmitting data in a multiple-branch transmitter-diversity orthogonal frequency-division multiplexing (OFDM) system A system and method for transmitting data in multiple-branch transmitter-diversity OFDM systems is presented. In one embodiment, an approach is taken where an inverse Fourier transform (IFT) is performed on data prior to encoding the data for transmission in the mul... | 07/01/2008 |
| 7366480 | Radio communication device In the radio communication device of the present invention, a first carrier transmission modulation wave outputted from a first signal generator 101 is amplified by a first power amplifier 103 and transmitted from a first antenna element 107 thr... | 04/29/2008 |
| 7315975 | Transmission power control apparatus in wireless communication system and method therefor The present invention provides an apparatus and method for controlling transmission powers of R-CQICH (reverse-channel quality indicator channel) and R-ACKCH (reverse-acknowledgment channel) independently. The present invention includes the steps of receiving a firs... | 01/01/2008 |
| 7274914 | Output power error absorbing circuit and multi-carrier transmitter having the same A power correction value generating unit determines a power correction value for minimizing an error, from a reference output power value of a carrier multiplexed signal, generating due to peak power suppression under a carrier setting based on the carrier setting r... | 09/25/2007 |
| 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 |
| 7181233 | Multi-user non-blocking duplex wireless voice communication system and method An economical, reliable, robust and easy to use multi-user voice communication system and method suitable for use in rapidly evolving tactical or hazardous situations continuously permits each user to hear every voice communication occurring among the other users, n... | 02/20/2007 |
| 7177609 | Chopper-direct-conversion (CDC) radio architecture A chopper-direct-conversion (CDC) radio receiver includes a phase-alternating mixer receiving an antenna input signal and at least one local oscillator signal and generating a double sideband signal in a single mixing step. The phase-alternating mixer may be impleme... | 02/13/2007 |
| 7171168 | Ramp signal with boost portion preceding a time slot A transmitter includes a power amplifier which is capable of both linear and non-linear operation, controlled by first and second control loops. A power controller includes a capacitive component, and controls the gain of the power amplifier. A ramp generation circu... | 01/30/2007 |
| 7162211 | Methods and apparatus for transmitting information between a basestation and multiple mobile stations Methods and apparatus for scheduling mobile stations (MSs) to download data and/or to control the rate of downloading to an MS from a base station (BS) as a function of downlink channel condition information are described. Artificial channel variations, which can be... | 01/09/2007 |
| 7113757 | Method and its apparatus for increasing output power of the carriers of wide-band multi-carrier base station A method and apparatus of increasing output power of a plurality of carriers of a wide-band multi-carrier base station system utilizes gain adjusting coefficients to adjust output amplitude of the carriers to satisfy the requirement of the wide-band base station sys... | 09/26/2006 |
| 7027776 | Transverter control mechanism for a wireless modem in a broadband access system A system and method for controlling a transverter from a wireless modem unit (WMU). A WMU delivers a control signal to a transceiver. This signal is outside the IF signal data range (preferably below 11 MHz). The signal is carried on the cable between the transceive... | 04/11/2006 |
| 7013165 | Antenna array apparatus and beamforming method using GPS signal for base station in mobile telecommunication system There is provided an antenna array apparatus using a GPS signal in a base station and a beamforming method thereof. In the antenna array apparatus, a GPS signal processor receives GPS position information from a mobile station and calculates the position information... | 03/14/2006 |
| 6934514 | System for transmitting digital signals with FM signals A system for transmitting digital signals in the same band and on the same channel with FM signals is disclosed. The design of the system according to the present invention includes a coupler, which may be a +3 dB hybrid quadrature coupler, and circularly polarized ... | 08/23/2005 |
| 6934519 | Radio transmission apparatus A radio transmission apparatus for performing radio transmission by use of a plurality of carrier frequencies, including signal processing systems for respective channels. Each signal processing system includes a transmission signal generator that modulates transmis... | 08/23/2005 |
| 6690945 | Method for suppressing transients using a pulse shaping look-up table The pulse-shaping look-up table with transient suppression (530) avoids hard turn-on and turn-off transients by modifying word segments of initial and final digital words during transmission of a digital data sequence. A controller (570) sends a mode sign... | 02/10/2004 |
| 6625427 | Radio transmission apparatus A radio transmission apparatus for performing radio transmission by use of a plurality of carrier frequencies including signal processing systems for respective channels. Each signal processing system includes a transmission signal generator that modulate... | 09/23/2003 |
| 6507622 | Communication systems, sender and receiver To use high noise transmission lines, such as an electric wire, as the lines to transmit signals, it is imperative to reduce the level of signals. The present invention is provided with a sending signal generating means 10, which outputs converted data af... | 01/14/2003 |
| 6393258 | PROCESS AND SYSTEM FOR ADJUSTING THE LEVEL OF THE SPURIOUS LINES OF THE OUTPUT FREQUENCY SPECTRUM OF A SINGLE-SIDEBAND FREQUENCY TRANSPOSITION DEVICE, IN PARTICULAR INCORPORATED INTO A MOBILE TELEPHONE A process for adjusting a level of spurious signal spectral lines in an output frequency spectrum provided by a single-sideband frequency mixer includes the step of generating two mutually phase-shifted test signals defined by a plurality of parameters, a... | 05/21/2002 |
| 6349216 | Load envelope following amplifier system A load envelope following (LEF) amplifier system to increase the efficiency of amplification systems that employ linear modulation schemes. The LEF system has a signal amplifier for receiving an input signal that has an amplitude modulation (AM) envelope.... | 02/19/2002 |
| 6137826 | Dual-mode modulation systems and methods including oversampling of narrow bandwidth signals A narrow bandwidth signal, such as a narrowband FM signal, is modulated in a modulator that modulates a wide bandwidth signal, such as a CDMA signal, by oversampling the narrow bandwidth signal and applying the oversampled narrow bandwidth signal to the m... | 10/24/2000 |
| 6100771 | Multi-signal generator It is to provide a multi-signal generator which is able to lower the cost thereof by performing modulation in a low frequency range and using an output of a frequency synthesizer commonly to all channels. The multi-signal generator for generating a multi-... | 08/08/2000 |
| 6061405 | Time domain source matched multicarrier quadrature amplitude modulation (QAM) method and apparatus A multicarrier transmission system (100) routes data symbols from a data source (142) to a multicarrier modulator (145). Each modulator (201, 202, 203) within the multicarrier modulator (145) is coupled to a corresponding gain adjuster (211, 212, 213) tha... | 05/09/2000 |
| 5924024 | Method and circuit for achieving frequency conversion A frequency conversion method and a frequency conversion circuit which enlarge the frequency difference between the upper and lower sidebands of the output signal so as to enable the undesired sideband to be easily eliminated by a filter even in a case wh... | 07/13/1999 |
| 5822685 | Modulating reflector circuit A modulating reflector circuit arrangement comprising a transistor configured by means of a feedback arrangement upon operation within a linear region of the transistor's current/voltage characteristic to reflect an incoming amplitude modulated signal wit... | 10/13/1998 |
| 4955072 | Method of generating an amplitude-modulated ISB transmission signal and apparatus for carrying out the method In the case of a method for the generation of an amplitude-modulated ISB transmission signal from different AF signal (NF1,2), the signal vectors are split into signal components (x1,y1 and x2,y2, respectively), components sums (X,Y) are formed from the s... | 09/04/1990 |
| 4761821 | Radio frequency signal transmission system with carrier frequencies at opposite edges of the channel A radio frequency transmitter simultaneously transmits both a local oscillator frequency and that frequency modulated by an information content signal. A receiver receives a carrier wave that is at the opposite edge of a channel from that of the local osc... | 08/02/1988 |
| 4584692 | Data transmitting-receiving system A data transmitting-receiving system including both a transmitter part and a receiver part. The transmitter part transmits a modulation signal on one of the vertically and horizontally polarized waves and, at the same time, transmits a carrier on the othe... | 04/22/1986 |
| 4432079 | Synchronous/asynchronous independent single sideband acoustic telemetry An undersea communications system provides for improved data transmission pabilities. Two separate sources of information respectively modulate the upper and the lower sidebands of an acoustic carrier. The discretely modulated sidebands are simultaneously... | 02/14/1984 |
