Class 455/105 - Common frequency

Subclass of Class 455 - Telecommunications
Definition: Subject matter where the plural transmitters broadcast on
No. of patents: 35
Last issue date: 02/22/2011

Number	Title	Issue Date
7894781	High-speed two-way point-to-point transmission Multiple-input/multiple-output (MIMO) antenna technology is used in a point-to-point radio link to provide higher data rates than would otherwise be achievable in a similar system that did not use MIMO antenna technology. Particular embodiments of the invention impl...	02/22/2011
7620375	High-speed two-way point-to-point transmission Multiple-input/multiple-output (MIMO) antenna technology is used in a point-to-point radio link to provide higher data rates than would otherwise be achievable in a similar system that did not use MIMO antenna technology. Particular embodiments of the invention impl...	11/17/2009
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
7242964	Shaping of EM field for transmission to multiple terminals A method and apparatus for directing energy in a plurality of azimuth directions. The amount of energy directed in the azimuth direction of a mobile terminal is a function of the location and acceptable receive strength of at least two mobile terminals. The function...	07/10/2007
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
7110739	Multi-transmitter communication system employing anti-phase pilot signals Base station transmitter signals are combined more effectively through the use of anti-phase pilots between pairs of transmission paths. At the combiner, the pilots will cancel when the amplitude, phase, and delay of the two transmission paths entering the combiner ...	09/19/2006
7006804	High-speed two-way point-to-point transmission Multiple-input/multiple-output (MIMO) antenna technology is used in a point-to-point radio link to provide higher data rates than would otherwise be achievable in a similar system that did not use MIMO antenna technology. Particular embodiments of the invention impl...	02/28/2006
6993299	Efficiency of power amplifiers in devices using transmit beamforming Systems and methods for optimizing the efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for transmission by a corresponding one of a plurality of antennas. Using transmit beamforming, th...	01/31/2006
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
6871081	Broadband wireless access system Typically it is expensive to add cable within an existing multiple dwelling units (MDUs) such as blocks of flats to provide additional services such as broadband internet access, video on demand and video telephony. The present invention provides a broadband wireles...	03/22/2005
6871049	Improving the efficiency of power amplifiers in devices using transmit beamforming Systems and methods for optimizing the efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for transmission by a corresponding one of a plurality of antennas. Using transmit beamforming, th...	03/22/2005
6480703	Common carrier, multiple output RF upconverter The invention provides a mechanism for implementing a common carrier, multiple output RF upconverter. The preferred embodiment of the invention comprises a method and apparatus for distributing the LO signals for both the first and second LO functions to ...	11/12/2002
6356207	DSRC car-mounted equipment A DSRC car-mounted equipment which self-diagnoses its communication function and informs the driver of the result, comprising a first local oscillator 30 for generating a car-mounted equipment frequency fosc, a demodulator 16 for detecting the electric fi...	03/12/2002
6256491	Voice security between a composite channel telephone communications link and a telephone An apparatus and method for security of individual communications over a composite communications channel such as T1 or E1. The composite channel is digitized. Individual channels are separated, but identifying information of each channel is retained. A level ...	07/03/2001
5995810	Method and apparatus for controlling transmission band In a method for controlling transmission band, minimum intervals are provided for a plurality of signal sources, respectively, so that each of the signal sources turns into a condition where a signal can be transmitted therefrom when the minimum interval ...	11/30/1999
5943345	AM multiplexing broadcast apparatus An AM multiplexing broadcast apparatus multiplexes a digital modulated signal independent of an AM modulated signal, in the same frequency band as the AM modulated signal. A sum signal is amplified by a first amplifier. An inverse of the sum signal is obt...	08/24/1999
5940429	Cross-term compensation power adjustment of embedded auxiliary data in a primary data signal An auxiliary data signal is transported with a primary data signal by hiding the auxiliary data signal in the form of colored noise. The colored noise has a spectrum that simulates the spectrum of the primary data signal. By adjusting the gain of individu...	08/17/1999
5926111	Pulsed width modulated remote signalling and location identification system for summoning a service industry worker A system for summoning a service industry worker using pulsed width modulation for remote signalling having a number of signalling switches, each connected to a transmitter. When a switch is activated, the corresponding transmitter transmits an RF carrier...	07/20/1999
5854571	Method and apparatus for controlling a peak envelope power of a power amplifier An apparatus and method of reducing a peak envelope power of a linear power amplifier (10) amplifying a plurality of channels is provided. The method includes the steps of measuring (104) the peak envelope power of the linear power amplifier, measuring a ...	12/29/1998
5584057	Use of diversity transmission to relax adjacent channel requirements in mobile telephone systems The present invention includes a system and method for reducing adjacent channel interference, particularly in CDMA radiotelephone systems. Diversity transmissions are provided for weaker signals to be transmitted by coupling delayed or advanced versions ...	12/10/1996
5448767	Transmitter network with a single transmitter frequency Improved transmitter network with a single transmitter frequency. A transmitter network comprising a plurality of transmitters having a like transmitter frequency may cause disturbance to occur in an adjacent similar transmitter network. This disturbance is no...	09/05/1995
5345599	Increasing capacity in wireless broadcast systems using distributed transmission/directional reception (DTDR) A method and apparatus for increasing the capacity of wireless broadcast communications system from a central studio to a plurality of users in a service area is disclosed. Given a source signal whose high information rate exceeds the practical informatio...	09/06/1994
5054113	Communication system with bit sampling method in portable receiver for simulcast communication Receivers synchronize to signals sequentially transmitted from several transmitters prior to receiving signals simulcast by the transmitters. The relative delay differential of the received sequential signals is measured and used to determine the optimal ...	10/01/1991
4896371	Synchronous AM transmission system having reduced self interference effects A synchronous transmission system that improves reception in areas where the main and the satellite signal create significant self interference. At least one of the synchronous transmitters is phase modulated in accordance with a selected modulation funct...	01/23/1990
4718111	Arrangement for combining the output signals from a plurality of transmitters tuned to the same frequency An arrangement for combining the output signals from a plurality of transmission units (2, 3) tuned to the same frequency and included in the arrangement, while each arrangement is by itself capable of functioning as a transmission unit (2) whose output s...	01/05/1988
4614945	Automatic/remote RF instrument reading method and apparatus An automatic/remote instrument monitoring system and method are disclosed. RF transponder units are operatively connected to and monitor one or more parameters of a remotely located instrument. The transponders include RF receivers that sample received RF...	09/30/1986
4570265	Random frequency offsetting apparatus for multi-transmitter simulcast radio communications systems Apparatus for randomly offsetting the frequencies of each transmitter in a simulcast radio communications system is described. The random frequency offsetting apparatus includes a random noise source for generating a noise signal which is amplified and lo...	02/11/1986
4415771	Public alert and advisory systems Public alert and advisory systems for the communication of emergency and/or other information from one or more central locations to a plurality of remote locations, such as, by way of example, information regarding a nuclear accident and evacuation proced...	11/15/1983
4344169	Method of connecting two short-wave transmitters in parallel The specification discloses a method for connecting first and second transmitters, each containing its own oscillator, in parallel and to first and second aerial halves, respectively. A phase difference signal representative of the phase difference betwee...	08/10/1982
4320503	Synchronizing transmissions from two earth stations to satellite A method of synchronizing the transmissions of alternate video fields or frames from two earth stations over a common uplink channel to a satellite so that the fields or frames arrive in interleaved time periods. A synchronizing pulse is transmitted over ...	03/16/1982
4232392	Radio transmission systems A radio transmission system is disclosed having a base station with a plurality of spaced radio transmitters in which an information signal is simultaneously transmitted on the same carrier frequency channel from all the transmitters. Each information sig...	11/04/1980
4223405	Multitransmitter digital signaling system In a multitransmitter digital signaling system for mobile communications consisting of a plurality of base stations, different waves are superposed on the digital information signals in adjacent base stations and carrier waves of the same frequency are an...	09/16/1980
4199821	Data transmission The invention is concerned with circuit arrangements which minimize, or at least reduce, the tendency for a frequency modulated signal in one transmission channel carrying digital data to interfere in an adjacent channel. There is disclosed a system for t...	04/22/1980
4110709	Apparatus for coupling microwave energy from two oscillators to a common transmission line A microwave system provides signals of two separate microwave frequencies, designated F.sub.(1) and F.sub.(2), alternately or simultaneously to a common coaxial transmission line by combining the outputs of two microwave frequency oscillators of frequenci...	08/29/1978
4051438	Co-channel multiple signal broadcasting system Interference in the overlapping of at least two transmission transmitters areas of a co-channel multiple signal broadcasting system is suppressed by an asymmetrical radio frequency carrier deviation in one given direction of one of the two transmitters an...	09/27/1977

PatentStorm

Bizarre Patents

PatentStorm News

Class 455/105 - Common frequency