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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 8170081 | System and method for adjusting DIDO interference cancellation based on signal strength measurements A machine-implemented system and method are described for removing interference between adjacent distributed-input-distributed-output (DIDO) clusters comprising. For example, a method according to one embodiment comprises: detecting signal strength at a first client... | 05/01/2012 |
| 8160121 | System and method for distributed input-distributed output wireless communications A system and method are described for dynamically adapting the communication characteristics of a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”). For example, a method according to one embodiment of the invention comprises: transmitt... | 04/17/2012 |
| 8126030 | Multi-mode wireless communication device and method A multimode wireless communication device capable of communicating pursuant to first and second communication protocols, including a method wherein a determination is made (530) as to whether a harmonic generated during transmission in one protocol interferes... | 02/28/2012 |
| 8121174 | Signal quality measurement system This disclosure relates to method, device and system for measuring signal quality in a communication system. An access point receives an uplink signal from a transmitter. The uplink signal contains a data portion and a result of a hash function. The uplink signal is... | 02/21/2012 |
| 8116351 | Downlink power control with limit to dynamic range using detection of downlink transmit power An apparatus and method is provided for dynamic range power control of a wireless downlink communication signal, such that target signal quality adjustments are held temporarily when it is apparent that transmit power control commands will not produce the desired re... | 02/14/2012 |
| 8090004 | Spectrum spread communication method and system using very weak power, and high frequency radio apparatus Provided is a high frequency radio apparatus for correcting a frequency of a carrier of the own apparatus in accordance with a frequency of a reception carrier when performing spread spectrum communication using very weak power. A carrier demodulating part demodulat... | 01/03/2012 |
| 8085832 | Segment-wise channel equalization based data estimation Data is estimated of a plurality of received spread spectrum signals by a wireless communication apparatus. The plurality of received communications are received in a shared spectrum. The received communications are sampled to produce a received vector of sequential... | 12/27/2011 |
| 8073037 | Base station apparatus and response signal receiving method A wireless communication apparatus capable of minimizing the degradation of the separation characteristic of response signals to be code-multiplexed. In the apparatus, a control part (209) controls both a ZC sequence to be used for the primary spread in a spr... | 12/06/2011 |
| 8059695 | Spread carrier self correcting codes A transmitter, receiver and communication technique. The transmitter is adapted to interleave a first pseudo-noise sequence with a second pseudo-noise sequence to provide a third pseudo-noise sequence. The third sequence is transmitted and then received by the inven... | 11/15/2011 |
| 8054866 | MC-CDMA system, transmitter and receiver A MC-CDMA transmitter and an MC-CDMA receiver are provided, which use a novel orthogonal spreading code that allows an effect by a delay wave to appear in only a specific user. An MC-CDMA system includes: a transmitter which multiplies a transmitting signal by a sin... | 11/08/2011 |
| 8045596 | Apparatus and method for transmitting/receiving a signal in a communication system An apparatus for transmitting/receiving a signal in a communication system is provided. A Mobile Station (MS) spreads a transmission signal to generate a spreading signal, receives, from a Base Station (BS), information on a second spreading signal transmission regi... | 10/25/2011 |
| 8014437 | Low-rate long-range mode for OFDM wireless LAN A system for implementing an orthogonal frequency division multiplexing scheme and providing an improved range extension. The system includes a transmitter for transmitting data to a receiver. The transmitter includes a symbol mapper for generating a symbol for each... | 09/06/2011 |
| 8014436 | Multi-dimensional signal of reduced peak-to-RMS ratio A transmitter and a method are described herein that can generate a radio signal with a reduced ratio of peak amplitude to root-mean-square amplitude which helps to improve the transmit efficiency of the transmitter's power amplifier. In addition, a receiver is also... | 09/06/2011 |
| 8005127 | Retransmission in a cellular communication system An apparatus comprises a detection processor (203) for detecting retransmission feedback messages in response to a detection threshold. A threshold processor (207) determines the detection threshold in response to a noise estimate generated by a noise ... | 08/23/2011 |
| 7974330 | Multi-carrier code dividing multiplex transfer system and method, and receiving device The multi-carrier code dividing multiplex transfer system of the present invention includes a direct demodulator that discriminates transmitted signals according to a receiving signal point composed of a combination of receiving values in a spread state of sub-carri... | 07/05/2011 |
| 7940831 | Direct sequence spread spectrum system and method thereof A method for a direct sequence spread spectrum communication system comprises encoding a first signal of data in a communication channel, embedding a second signal of data as notches in the communication channel, transmitting the first signal of data and the second ... | 05/10/2011 |
| 7924905 | Wireless communication apparatus and method thereof A wireless communication apparatus in a closed loop communication wherein a channel resource can be shared among users and hence the capacity of the communication system can be increased. In this apparatus, calculating parts (6031 and 6032) calculate a... | 04/12/2011 |
| RE42219 | Multiple-input multiple-output (MIMO) spread spectrum system and method A system and method for transmitting a plurality of spread-spectrum signals over a communications channel having fading. The plurality of spread-spectrum signals are radiated by a plurality of antennas, with each antenna preferably spaced by one-quarter wavelength. ... | 03/15/2011 |
| 7899107 | Preamble detection using low-complexity cross-correlation A system includes a differential demodulation module that differentially demodulates modulated signals. A cross-correlation module generates cross-correlation values by cross-correlating states of X symbols in the differentially demodulated signals with correspondin... | 03/01/2011 |
| 7894505 | Apparatus and method for selecting effective channel in a multi-user MIMO system An apparatus and method for selecting an effective channel in a multi-user MIMO system are provided, in which a receiver receives pilot signals from a transmitter, determines channel information indicating an antenna offering the best quality among a plurality of an... | 02/22/2011 |
| 7881361 | Spectrally shaped generalized multitone direct sequence spread spectrum modulation A system (10) for communicating a direct sequence spread spectrum signal, a related transmitter (12), a related receiver (14), and methods associated therewith are provided in various embodiments. A data rate vector, a processing gain vector, a ... | 02/01/2011 |
| 7817708 | Orthogonal code division multiplex CCK (OCDM-CCK) method and apparatus for high data rate wireless LAN Orthogonal Code Division Multiplexing (OCDM) transceiver system with Complementary Code Keying (CCK) and method for baseband OCDM-CCK encoding and decoding are provided. The OCDM-CCK method comprises a serial-to-parallel data converter converting a stream of M*n-bit... | 10/19/2010 |
| 7809044 | Method and apparatus for forward link power control A forward link power control mechanism measures the reverse link power control bits which are transmitted on the forward traffic channel. At the remote station, the reverse link power control bits from multiples base stations or multiple signal paths are measured, c... | 10/05/2010 |
| 7796676 | Signalling system A signalling system is provided which can be used to update the prices of goods which are electronically displayed on supermarket shelves. The signaling system may include a first signalling device having an input terminal for receiving electrical message data recei... | 09/14/2010 |
| 7787517 | Method for transmitting multiple streams in wireless broadcast networks Accordingly, a method and apparatus are provided to convert received content into a first stream and a second stream, to transmit said first stream using a first tone and to transmit said second stream using an orthogonal scheme. A layering scheme is used to transmi... | 08/31/2010 |
| 7738531 | Method and apparatus for reducing code phase search space A GPS communication system including a server and a client, each including a GPS receiver, for reducing the code phase search space of the GPS receiver of the client. The communication system includes a transmitter for transmitting timing information from the server... | 06/15/2010 |
| 7733939 | Low-rate long-range mode for OFDM wireless LAN A system for implementing an orthogonal frequency division multiplexing scheme and providing an improved range extension. The system includes a transmitter for transmitting data to a receiver. The transmitter includes a symbol mapper for generating a symbol for each... | 06/08/2010 |
| 7720130 | Efficient receiver architecture for transmit diversity techniques Transmit diversity (TD) has become a common technique used in modern wireless communications systems to improve performance. TD uses multiple antennas (e.g., 110 and 111) at a transmitter (e.g., 105) to transmit multiple encoded datastreams and ... | 05/18/2010 |
| 7711030 | System and method for spatial-multiplexed tropospheric scatter communications A method is described comprising: transmitting a training signal from each antenna of a base station to each of a plurality of client devices utilizing tropospheric scatter, each of the client devices analyzing each training signal to generate channel characterizati... | 05/04/2010 |
| 7701998 | Radio signal positioning Positioning of a mobile signal transmitter. A respective distance between the transmitter and each of a plurality of sensors is determined based on a direct sequence spread spectrum signal. A transmission delay of the signal is estimated with high accuracy by, in ea... | 04/20/2010 |
| 7680174 | Method and apparatus for forward link power control A forward link power control mechanism measures the reverse link power control bits which are transmitted on the forward traffic channel. At the remote station, the reverse link power control bits from multiples base stations or multiple signal paths are measured, c... | 03/16/2010 |
| 7672357 | Base station apparatus of mobile communication system A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes ba... | 03/02/2010 |
| 7668225 | Multi-MOK modulation/demodulation transmission process, corresponding transmitter and receiver At transmission, the data to be transmitted is divided into N data blocks, these N blocks are processed in parallel in N M-ary orthogonal keying (MOK) modulation channels, each modulation using a group of spread codes, each channel emitting a signal. All of these si... | 02/23/2010 |
| 7664162 | High-frequency wireless peripheral device with auto-connection and auto-synchronization Automatic establishment of a connection between a human interface device and a host transceiver unit. A marriage ID is exchanged in a synchronization step. The marriage ID being used by both the host transceiver and the human interface device to calculate a spread s... | 02/16/2010 |
| 7653120 | Channel-adaptive waveform modulation A method for transmitting a sequence of data blocks of equal length includes obtaining part of a matrix for the impulse response function of a communication channel between a transmitter and a receiver. The part relating to channel-induced interference between sampl... | 01/26/2010 |
| 7636381 | System and method for distributed input-distributed output wireless communications A system for dynamically adapting the communication characteristics of a multiple antenna system (MAS) with multi-user (MU) transmissions (defined with the acronym MU-MAS), such as a distributed-input distributed-output (DIDO) communication system. For example, a sy... | 12/22/2009 |
| 7633994 | System and method for distributed input-distributed output wireless communications A system for compensating for in-phase and quadrature (I/Q) imbalances for multiple antenna systems (MAS) with multi-user (MU) transmissions (defined with the acronym MU-MAS), such as distributed-input distributed-output (DIDO) communication systems, comprising mult... | 12/15/2009 |
| 7620095 | RF modem utilizing saw device with pulse shaping and programmable frequency synthesizer A bidirectional direct sequence spread spectrum half-duplex RF modem. that can be applied to transmit and receive numerous types of analog and digital pulse modulation. The modem incorporates a SAW based correlator for performing the spreading and de-spreading funct... | 11/17/2009 |
| 7616677 | Downlink power control with limit to dynamic range using detection of downlink transmit power An apparatus and method is provided for dynamic range power control of a wireless downlink communication signal, such that target signal quality adjustments are held temporarily when it is apparent that transmit power control commands will not produce the desired re... | 11/10/2009 |
| 7613226 | Method and apparatus for transferring signals in a wireless communication system Data is transferred in a wireless communication system, such as a wireless spread spectrum communication system. A plurality of transmitting antennas are provided. Data is encoded to produce a plurality of data streams for each of the plurality of codes. The plurali... | 11/03/2009 |
