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| Number | Title | Issue Date |
| 8054916 | Method for using a base station to selectively utilize B and D channels to support a plurality of communications A method for using a wireless digital base station to receive, process and transmit a plurality of communications having independent data rates establishing a first communication channel having a first data communication rate to support a first communication; determ... | 11/08/2011 |
| 7809089 | Decorrelating discrimination system of code division multiple access signals A de-correlating discriminating system of code division multiple access signals including a system structure composed of a plurality of cells, each of the plurality of cells including a base-station and a plurality of user-stations, each of the user-stations includi... | 10/05/2010 |
| 7643582 | Method and system for determining symbol boundary timing in a multicarrier data transmission system Improved techniques for acquiring symbol boundary timing at a receiver of a multicarrier data transmission system during a training sequence are disclosed. One aspect is symbol boundary determination at a receiver wherein minimal interference is used as a criterion ... | 01/05/2010 |
| 7609785 | Mitigation of interference in cell search by wireless transmit and receive units A wireless transmit receive unit (WTRU) provides facilitation of cell search. In one embodiment, received samples are split into a plurality of sample sets for processing. Each of the sets is processed and an accumulated result is divided by an estimated noise value... | 10/27/2009 |
| 7400904 | Dual mode AM-FM receiver with I-Q decoding, such as for utility data collection Methods and apparatus demodulate and decode a plurality of AM and FM arriving signals, which permit, for example, a utility data-collecting unit to concurrently receive and decode transmitted signals of legacy transmitters as well as more recent FM based transmitter... | 07/15/2008 |
| 7305220 | Radio receiver with diversity receiving function A radio receiver includes a first sampling section and a second sampling section for sampling, in the predetermined sampling interval, a first receiving symbol and a second receiving symbol transmitted to the radio receiver via a first transmission route and a secon... | 12/04/2007 |
| 7280509 | CDMA 3X base transceiver station in mobile communication system A base transceiver station in a mobile communication system, includes a GPS time frequency unit for outputting a synchronized time which is received from at least one GPS satellite and frequency information; a BTS main processing unit for generating a control comman... | 10/09/2007 |
| 7257408 | Radio communication system and transmission mode selecting method A radio communication system for quickly selecting an optimum transmission mode in accordance with the quality and situation of a propagation path is provided. The system comprises first and second radio communication apparatuses capable of radio-communicating with ... | 08/14/2007 |
| 7237177 | Method of calculating internal signals for use in a map algorithm A method of calculating internal signals for use in a MAP algorithm is disclosed, comprising the steps of: obtaining first decoding signals by processing received systematic and received encoded symbols of each symbol sequence of a... | 06/26/2007 |
| 7231003 | System and method for aligning data between local and remote sources thereof The communication system includes two communication channels for communication of protection and control information between two protective relays on a power line portion of an electric power system. A switch provided at the receiving relay connects one communicatio... | 06/12/2007 |
| 7184493 | Pulse sorting apparatus for frequency histogramming in a radar receiver system Disclosed is a real-time pulse sorting apparatus of a preprocessor in a pulsed radiation detection system. The apparatus, responsive to digital signals generated by a system receiver, uses the instantaneous frequency as the address input to store discrete data group... | 02/27/2007 |
| 7162000 | Delay locked loop synthesizer with multiple outputs and digital modulation A delay locked loop circuit (200) in which multiple outputs are produced. A single delay line (24) is shared among multiple tap selection circuits (256A, 265B, 265C). Fixed phase shifts (412) can be introduced between multip... | 01/09/2007 |
| 7158723 | Channel identification in communications networks Channels in an optical WDM network are each identified by at least two dither tones with which the channel is modulated, the dither tones alternating with a predetermined periodicity so that at any instant each channel is modulated by only one dither tone. The dithe... | 01/02/2007 |
| 7158588 | System and method for obtaining accurate symbol rate and carrier phase, frequency, and timing acquisition for minimum shift keyed waveform The present invention relates generally to communication systems, both wired and wireless, employing a continuous phase modulation (“CPM”) waveform with a minimum shift keying (“MSK”) preamble. The present inventive system and method uses information from co... | 01/02/2007 |
| 7155122 | Channel identification in communications networks Channels in an optical WDM network are each identified by at least two dither tones with which the channel is modulated, the dither tones alternating with a predetermined periodicity so that at any instant each channel is modulated by only one dither tone. The dithe... | 12/26/2006 |
| 7154978 | Cascaded delay locked loop circuit A delay locked loop frequency synthesizer in several embodiments uses a primary delay line element (24) and one or more secondary delay elements (162 . . . 164, 270, 310). In one embodiment, a main delay line (24) is used to coarsely select a fr... | 12/26/2006 |
| 7127391 | Method and apparatus for slice point determination A method and apparatus is disclosed for reducing the error rate in a received signal by determining and establishing an optimal slice point for a decision device, or optimal operational parameters. In one embodiment, a processor monitors a received signal to determi... | 10/24/2006 |
| 7106804 | Method of and system for modulating and demodulating a communication signal using differential quadrature phase shift keying (DQPSK) A system for and method of modulating and demodulating a communication signal using differential quadrature phase shift keying (DQPSK) can include, upon receiving an inbound communication signal, demodulating the inbound communication signal by obtaining Pi/4 differ... | 09/12/2006 |
| 7092731 | Method for improving capacity of a reverse link channel in a wireless network The capacity of a reverse link is improved by realizing a scheme to effect sharp changes in pilot channel transmit power (PCTP) and data channel to pilot power ratio (DCPR), coordinated with the start of the data channel transmission. The change in pilot power and d... | 08/15/2006 |
| 7088790 | Circuit for detecting a center level of a FSK demodulated signal to correct same In demodulation of a FSK signal, a circuit for detecting a center level of said signal and correcting an error thereof is provided. Said circuit can accomplish the detection of the center level correctly always even if there exist cords with various lengths in a len... | 08/08/2006 |
| 7072414 | Gaussian minimum shift keying (GMSK) precoding communication method A premodulation precoding method precodes a data sequence in a Gaussian minimum shift keying (GMSK) modulator to improve the bit error rate performance of a coherent Viterbi receivers generating estimates of the communicated data sequence without the use of differen... | 07/04/2006 |
| 7068169 | Use of a subcarrier in an organic semiconductor radio frequency identification system A radio frequency identification system comprising a radio reader circuit operable to emit a radio frequency carrier signal modulated with a subcarrier, which has a subcarrier modulation rate. The radio frequency identification tag circuit is operable to extract the... | 06/27/2006 |
| 7054556 | Channel identification in communications networks Channels in an optical WDM network are each identified by at least two dither tones with which the channel is modulated, the dither tones alternating with a predetermined periodicity so that at any instant each channel is modulated by only one dither tone. The dithe... | 05/30/2006 |
| 7035312 | Pilot signal cycling technique for a control system that reduces distortion produced by electrical circuits A control system comprising an electrical circuit that produces distortion where the electrical circuit has a frequency band of operation. A pilot modulated carrier signal is frequency hopped about the frequency band of operation. The hopping pilot modulated carrier... | 04/25/2006 |
| 7006582 | Receiving circuit Disclosed herein is a receiving circuit comprising demodulator 101 which pulls in the phase of each of burst signals respectively having preambles 701 and 711 each storing phase information or data therein, synchronous pattern parts 702 a... | 02/28/2006 |
| 7003047 | Tri-state integer cycle modulation The invention disclosed in this application uses a method of modulation named Tri-State Integer Cycle Modulation (TICM) wherein a carrier signal, comprised of a continuum of sine waves is modulated such that spectrum utilization is minimal. A modulation event is imp... | 02/21/2006 |
| 6933776 | Signal demodulating method of a two-phase frequency shift keying (FSK) digital demodulator There is provided a signal demodulating method of a two-phase frequency shift keying (FSK) digital demodulator. The method utilizes at least a detect circuit respectively detecting and collecting a positive edge signal and a negative edge signal of an intermediate f... | 08/23/2005 |
| 6928065 | Methods of addressing and signaling a plurality of subscriber units in a single slot In a system having at least a first slot (104) and a first header (106), at least one field is provided in the first header (106). The first slot (104) is configured into at least a first segment and a second segment or into at least a si... | 08/09/2005 |
| 6912611 | Split transactional unidirectional bus architecture and method of operation There is disclosed a bus interface unit for transferring data between a plurality of bus devices. The bus interface unit comprises: 1) a first bus device interface comprising: a) a first incoming request bus for receiving request packets from a first one of the plur... | 06/28/2005 |
| 6907096 | Data recovery method and apparatus In order to recover phase information, data transmitted at a first frequency is over-sampled using a clock at a second frequency, n times per bit time to obtain n samples. The n samples are used to detect the transitions between two logic levels in said transmitted ... | 06/14/2005 |
| 6904104 | Technique for demodulating a linear modulated data signal in a communications system A receiver section recovers the in-phase and quadrature components of a linear modulated data signal. The in-phase signal is sampled and quantized producing an in-phase sample stream, and the quadrature phase signal is sampled and quantized producing a quadrature sa... | 06/07/2005 |
| 6836648 | Receiving apparatus for electromagnetic signals The invention provides an apparatus for receiving electromagnetic signals with an improved capability to trace free or occupied channels. The invention comprises an assembly having a first frequency filter for filtering frequencies in a reception channel, when the a... | 12/28/2004 |
| 6813324 | Synchronized communication system A synchronized communication system for communicating signals into and from a medium is disclosed. The communication system utilizes a transmitter located at a central station external to the medium, which transmits a low frequency synchronization signal into the me... | 11/02/2004 |
| 6738430 | Apparatus and method for digital wireless communications In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is p... | 05/18/2004 |
| 6704351 | Method and system for training a modem A method for training a modem includes selecting a transmission rate from one of a plurality of bauds, each baud identifying at least one transmission rate. The method also includes attempting to train the modem at the transmission rate and measuring the ... | 03/09/2004 |
| 6671332 | Zero IF receiver with reduced AM detector A circuit for providing phase shifted I and Q output signals from a received FSK modulated signal and the method of its operation. The circuit includes apparatus for receiving an FSK modulated signal, first, second and third mixers, to which the received ... | 12/30/2003 |
| 6665350 | Method and system for improved analog signal detection A method and system for improved detection of analog signals, where the analog signals may be composed of one or more analog frequencies. In the method and system, an analog signal is received. A stream of data samples is created from the analog signal. B... | 12/16/2003 |
| 6618449 | Receiver for a frequency-shift-keying, continuous-wave radar A receiver of a frequency-shift-keying, continuous-wave radar comprises at least sampling means taking real samples of the signals in each reception channel and extrapolation means, the extrapolation means producing fictitious samples synchronous with the... | 09/09/2003 |
| 6608868 | Apparatus and method for digital wireless communications In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this w... | 08/19/2003 |
| 6556630 | Dual band telemetry system A dual band telemetry system useful for monitoring patients in a care unit of a health care facility. The system includes an antenna system with a first antenna tuned to receive a signal in a first frequency band, a second antenna tuned to receive a signa... | 04/29/2003 |
