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WO/2001/015360A1 |
The present invention provides an apparatus for and method of determining the nature of the wireless environment which is in use and dynamically selecting appropriate frequency channels for data transmissions which are more likely to acc...
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WO/2001/015481A1 |
A method and apparatus that allows a telecommunications system using cdma2000 1X to easily migrate to using cdma2000 3X. In other embodiments, the invention provides for better spectrum management, allows concurrent usage of a standard c...
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WO/2001/010159A1 |
A system and method for controlling information transmission and communication handoff between frequency division multiplexing (FDD) and time division multiplexing (TDD) communication systems using any multiple access scheme is provided....
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WO/2001/008319A1 |
A radio device is capable of compensating for nonlinear distortion of its power amplifier for transmission. The output signal from the power amplifier for transmission is fed back to a distributor. Using transmission signals and feedback...
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WO/2001/006751A1 |
A local area network using the telephone wiring within a residence or other building simultaneously with telephony signals. The local area network uses high pass filters to access the high-frequency band across the media, whereas the sta...
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WO/2001/005135A1 |
An integrated line card for providing an analog termination for both POTS and xDSL signals that represent the appropriate impedances at xDSL frequencies for the xDSL signals and appropriate impedances at POTS frequencies for POTS signals...
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WO/2001/005051A1 |
The invention concerns a method for increasing by M, M being any integer not less than 1, the number N, N being an integer not less than 2, communications set up between a central unit (15) and remote units (20¿1?-20¿N?; 21¿1?-21¿M?)...
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WO/2001/001584A2 |
In CDMA systems, a message to be transmitted is redundantly coded for transmission using a combination of error-correction coding and a spread-spectrum access code. The coded message is modulated to a first radio frequency channel, or ba...
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WO/2000/078075A1 |
A scanning operation in a mobile terminal includes storing identifiers of sub-carrier frequencies known to be in use without regard to operator identity or location of use. A first scanning of only sub-carrier frequencies identified by t...
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WO/2000/077971A1 |
The circuit has an input signal which is filtered with a first filter having a bandwidth greater than a bandwidth of the desired signal. The filtered signal is then sampled to generate discrete time samples, which is then filtered with a...
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WO/2000/074268A1 |
The invention relates to a method for carrying out simplex data transmission of a data telegram that is modulated to a carrier frequency, in particular, for carrying out the simplex radio transmission in a radio access control system. Ac...
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WO/2000/072488A1 |
A digital subscriber's line transmitting method for alternately transmitting and receiving DMT symbol strings between xDSL devices through TDD-xDSL transmission, in which on the training symbol transmission side, part of the data in a DM...
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WO/2000/070744A1 |
A method to separate data transmitted in parallel at arbitrary frequencies within a channel includes: separating a signal from one channel into a plurality of bins representing sub-channels, each bin having a bin frequency (902); generat...
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WO/2000/057660A1 |
The invention relates to clear descriptions for the transmission resources which can be used in an uplink and downlink for a radio transmission between a subscriber station and a base station, according to a hybrid multiple access method...
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WO/2000/054501A1 |
An upconverter for converting IF television signals to VHF or UHF signals prior to broadcast is configured to process either analog or digital televison signals. The upconverter identifies the type of incoming television signal and gener...
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WO/2000/051273A1 |
A system for implementing multiple communication channels on a single twisted pair transmission line (36) is disclosed. The system derives additional communication channels by way of a separate transceiver unit (54, 58) for each derived ...
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WO/2000/051350A1 |
Video programming signals from a broadband source are distributed on installed telephone wiring (62) to the individual units of a commercial structure or multiple unit dwelling. In all methods and associated devices a first transponder d...
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WO/2000/051059A2 |
A high bandwidth data network, such as for video, is provided which includes a regional ring with a plurality of local nodes (51), each local node including at least one fiber interface device (415) and at least one Local Node interface ...
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WO/2000/049749A1 |
When a primary modulation/demodulation method used by existing power line modems connected to the same power line is changed, a concept of a virtual master is adopted. Specifically, if a power line modem among multiple power line modems ...
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WO/2000/048318A1 |
Is disclosed a method and a relative circuit adapted to transfer to a microwave transmission carrier the angle modulation of an intermediate frequency signal. The conveyor of angle modulation is a PLL (100) which VCO (2) generates the mi...
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WO/2000/048331A1 |
The invention relates to a method and arrangement for reducing cyclo-stationary cross-talk noise and more particularly to mitigate the effects of cyclo-stationary cross-talk noise from narrow band time divided duplex (TDD) systems into a...
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WO/2000/042725A1 |
A method and apparatus for providing analog telephony services over a digital subscriber loop access system is presented including Asymmetric Digital Subscriber Loop (ADSL) utilizing spectrum above the POTs band for data services. An ATM...
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WO/2000/042727A1 |
A frenquency division multiplexing (FDM) node used in optical communications networks provides add-drop multiplexing (ADM) functionality between optical high-speed channels and electrical low-speed channels. The FDM node includes a high-...
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WO2000018051A9 |
A communication system and method requiring minimal adaptation of TDD equipment to support an FDD frame structure, includes a novel frame structure by which a plurality of user stations (102), each having a single frequency synthesizer, ...
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WO/2000/039920A1 |
A multi-frequency carrier transmitter (102) comprises input means for receiving a plurality of different digital signals to be transmitted. The different signals are to be transmitted on different carrier frequencies. Amplifier means (12...
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WO/2000/038349A1 |
A method and a telecommunications system supporting compressed mode operation is described in which this type of operation is used more frequently than previously known. To compensate for the reduction in reception quality caused by the ...
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WO/2000/036776A1 |
Out of devices connected to the same power line (7), a device which has judged based on the results of noise measurement that it is difficult to continue communication in the case of the current tone-set/tone position comes to serve as a...
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WO/2000/024125A1 |
The present invention relates generally to the problem of filtering, decimation or interpolation and frequency conversion in the digital domain, and more particularly to the use of the stand-alone or improved modified fast convolution al...
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WO/2000/018002A1 |
A multi-carrier transmitting apparatus and method is described, wherein a plurality of carrier signals are combined in the digital domain and supplied to a D/A converting means (3) for converting the combined digital carrier signals into...
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WO/2000/018142A2 |
A PN sequence phase searching apparatus in a multi-carrier CDMA mobile communication system. At least two PN sequence phase searchers search for the PN sequence phase of one of at least two different band input signals on different assig...
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WO/2000/011823A1 |
A 'stacked-carrier' spread spectrum communication system (10) based on frequency domain spreading that multiplies a time-domain representation of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In ...
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WO/2000/011898A1 |
A method of the present invention is used for simultaneous transmission and/or reception of multiple different communication resources, with frequency allocations (FA1...FA8) and (FAA...FAH). A radio frequency device (901) of the present...
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WO/2000/010261A2 |
The invention relates to a method for changing only one radio channel of an existing duplex radio link, whereby the changed radio channel or the radio channel to be changed is the faulty radio channel (D¿a?). The new radio channel (D¿n...
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WO/2000/008864A2 |
A transmitter for a multiple frequency radio communication system provides a capability for filtering spread spectrum signals of a multiple frequency system by using one lowpass filter (219), and variably controlling the sampling speed w...
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WO/2000/007399A1 |
In a telecommunications system (300), such as the Universal Mobile Telecommunications System (UMTS), a first duplexing technique (100) and a second duplexing technique (102) are employed. Bands of frequencies (108, 110, 118) are allocate...
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WO/2000/003509A1 |
The present invention provides for an improved transceiver architecture using fewer frequency synthesizers. The number of frequency synthesizers is reduced by utilizing an existing frequency source having a frequency slightly offset from...
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WO1999055027A9 |
An optimized integrated high capacity digital satellite trunking network, otherwise known as the Multipurpose Wideband Communications System (MPWCS) and method to link multiple earth stations in the same or different satellite antenna tr...
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WO/1999/065172A1 |
The present invention relates generally to the problem of filtering, decimation or interpolation and frequency conversion in the digital domain, and more particularly to its use in wideband multichannel receiver, channelisation, and tran...
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WO/1999/063692A1 |
A device and method for generating and distributing convolutional codes such that performance degradation due to a bad link environment may be minimized during channel decoding in a CDMA communication system. The convolutional encoder en...
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WO/1999/056424A1 |
An OFDM receiver system for performing precise OFDM demodulation is provided. The OFDM receiver system performs demodulation by sharing memories and operators in a time-divisional manner. FFT-processed data is separated into specific pil...
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WO/1999/056425A1 |
Quadrature modulation is carried out using a plurality of carrier frequencies, the signals are summed, and the peak signal power is detected. A coefficient for suppressing the amplitude of the transmission baseband signal is calculated o...
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WO/1999/053665A1 |
A method for generating a signal having a frame structure, each frame of the frame structure comprising at least one useful symbol (12), a guard interval (14) associated to the at least one useful symbol (12) and a reference symbol (16),...
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WO/1999/053664A1 |
A method of mapping information onto at least two simultaneous carriers (202, 206, 208) having different frequencies in a multi-carrier modulation system involves the step of controlling respective parameters of the at least two carriers...
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WO/1999/053666A1 |
For performing a coarse frequency synchronization compensating for a carrier frequency deviation from an oscillator frequency in a demodulation system (130) capable of demodulating a signal having a frame structure, the frame structure c...
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WO/1999/053679A1 |
A subscriber line digital transmission method for high-speed transmission by making use of an existing subscriber line called a telephone line while coexisting with a telephone system. A transmission method for subscriber line for high-s...
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WO/1999/053667A1 |
A method and an apparatus relate to a fine frequency synchronization compensating for a carrier frequency deviation from an oscillator frequency in a multi-carrier demodulation system (130) of the type capable of carrying out a different...
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WO/1999/050967A1 |
Apparatus and method for establishing a communication link. A negotiation data transmitting section (54) transmits carriers to a responding communication device (4). A negotiation data receiving section (54) receives carriers from the re...
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WO/1999/050984A1 |
In a system, device, and method for selecting a channel from among a plurality of channels, a number of available channels are selected for testing. A channel quality measurement is made for each of the number of channels. The channel ha...
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WO/1999/050987A1 |
For multicode transmission, to reduce the peak power, the amplitude is converted on the transmission side, and an estimator for compensating for the distortion due to the conversion is provided on the receiving side. In one method for th...
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WO/1999/049687A2 |
In a multiple access communication network a primary station (2) is coupled via a transmission medium to a plurality of secondary stations (4......18). The primary station is arranged for determining a free channel list comprising the ch...
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