Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 8115679 | Side lobe suppression Embodiments include a method to suppress side lobes of a main antenna by creating cancellation directions using a Side Lobe Canceller (SLC). Various embodiments also provide the Side Lobe Canceller. ... | 02/14/2012 |
| 7936304 | Method and system for isolating and reducing grating lobe interference This invention relates to the use of a sufficiently-sampled auxiliary array in combination with one or more under-sampled sub-arrays. The sufficiently-sampled auxiliary array is used to create a signal-free reference (SFR) beam that contains grating lobe interferenc... | 05/03/2011 |
| 7372891 | Signal generator and decoder A signal generator and decoder are used for a single sideband spread spectrum signal. A single sideband spread spectrum signal generator and decoder in which single sideband modulation using a complex spreading code is achieved with improved correlation properties, ... | 05/13/2008 |
| 7336601 | Adaptive time diversity and spatial diversity for OFDM An adaptable orthogonal frequency-division multiplexing system (OFDM) that uses a multiple input multiple output (MIMO) to having OFDM signals transmitted either in accordance with time diversity to reducing signal fading or in accordance with spatial diversity to i... | 02/26/2008 |
| 7333560 | Method and apparatus for transmitting data in a time division duplexed (TDD) communication system Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a ... | 02/19/2008 |
| 7330068 | Adjusting coefficients of a filter Demodulation apparatus includes a transversal filter characterized by coefficients adjusted by a coefficient determiner responsive to a constant modulus error signal and variable mode error signal related to the output of a spectral mean frequency detector having it... | 02/12/2008 |
| 7324584 | Low complexity interference cancellation The present invention relates to a new parallel interference cancellation (PIC) configuration where the PIC is implemented after the rake reception and multipath combining. In the invention disclosed, the regenerated interference contributions (functions of signatur... | 01/29/2008 |
| 7321332 | Device for measuring angle positions In a device for measuring angular positions by using radar pulses and mutually overlapping beam characteristics of at least two antenna elements, a switchable phase shifter is provided in the signal path of at least one antenna element which is switchable in the tim... | 01/22/2008 |
| 7319427 | Frequency diverse array with independent modulation of frequency, amplitude, and phase Method and apparatus for a frequency diverse array. Radio frequency signals are generated and applied to a power divider network. A progressive frequency shift is applied to all radio frequency signals across all spatial channels. Amplitude weighting signals are app... | 01/15/2008 |
| 7312751 | Phased array antenna system to achieve suppression of undesired signal components Various techniques are disclosed to suppress undesired signal components introduced by non-linear amplifiers of phased array antenna systems to accommodate bandwidths greater than one octave. For example, in accordance with one embodiment, a phased array antenna sys... | 12/25/2007 |
| 7277043 | Tactical aircraft check algorithm, system and method A method of generating aircraft tactical alerts includes receiving track positions for two aircraft; receiving trajectories and static conformance bounds for the two aircraft; receiving current position for the two aircraft; generating tactical check segments and va... | 10/02/2007 |
| 7276990 | Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same A switch arrangement comprises a plurality of MEMS switches arranged on a substrate about, and close to, a central point, each MEMS switch being disposed on a common imaginary circle centered on the central point. Additionally, and each MEMS switch is preferably spa... | 10/02/2007 |
| 7274752 | Maximum ratio transmission An arrangement where a transmitter has a plurality of transmitting antennas that concurrently transmit the same symbol, and where the signal delivered to each transmitting antenna is weighted by a factor that is related to the channel transmission coefficients found... | 09/25/2007 |
| 7272359 | Communicating signals according to a quality indicator using multiple antenna elements One or more quality indicators are established at a first communication device having antenna elements. The quality indicators indicate a quality of one or more communication links between the first communication device and one or more second communication devices. ... | 09/18/2007 |
| 7266355 | Low complexity equalizer for radio receiver A diversity receiver (60) has two diverse channels fed by the antennas, an adaptive equalizer (20,30) for each channel and a coefficient adapter (40) for adapting two sets of coefficients in a time shared manner for the equalizers. A combiner co... | 09/04/2007 |
| 7263143 | System and method for statistically directing automatic gain control The present invention is directed to a system and method which statistically determines when regularly occurring interference events of a predictable duration will occur, for example radar pulses and dynamically adjusts an automatic gain control (AGC) for RF data tr... | 08/28/2007 |
| 7257418 | Rapid user acquisition by a ground-based beamformer A method for rapid acquisition of a specific subscriber by a ground-based beamformer includes the steps of defining a coverage area as an arrangement of a plurality of cells wherein one of the plurality of cells includes a specific subscriber; defining a partition o... | 08/14/2007 |
| 7236127 | Control of radiation pattern in wireless telecommunications system The invention relates to controlling of characteristics of radiation patterns in wireless telecommunications system, where radiation patterns are provided by antenna arrays, each antenna array comprising at least two independent antenna units, each antenna unit bein... | 06/26/2007 |
| 7230911 | Sparse channel estimation for orthogonal frequency division multiplexed signals A computationally efficient channel estimation technique for use within an orthogonal frequency division multiplexing (OFDM) communication system determines coefficients of a channel transfer function by calculating the dot products of a pilot vector and a plurality... | 06/12/2007 |
| 7215954 | Resource allocation method for multi-platform communication system A mobile wireless communications system including a plurality of individual transponding nodes of various types, all in communication with a central processing hub. A local user signal is processed by the central processing hub and radiated through multiple paths to... | 05/08/2007 |
| 7212563 | Real-time locating system and method using timing signal A location system includes a plurality of signal readers for receiving signals from a wireless transmitter to be located. The signals include a wideband, spread spectrum signal and a timing marker appended a predetermined time in front of the wideband, spread spectr... | 05/01/2007 |
| 7209707 | Radio receiving device, array parameter optimal value estimation method, and array parameter optimal value estimation program A spatial multiplex base station (1000, 2000, 3000) estimates an optimal array parameter appropriate to a propagation environment of a received signal and changes the array parameter in an adaptive manner. The optimal value is estimated by referring to a tabl... | 04/24/2007 |
| 7194020 | Method and apparatus for dynamically adjusting acquisition search window A method for detecting packet data transmission following an inactive period of a transmitter. The method includes using a dynamic acquisition search window which grows from an initial width (determined by the size of the corresponding standard search window prior t... | 03/20/2007 |
| 7190746 | Multiple lobe dot product detector for M-code GPS receivers A positioning system receiver is disclosed. The positioning system receiver includes an antenna for receiving radio frequency (RF) signals. The positioning system receiver also includes a radio frequency front end system configured to convert the received RF signals... | 03/13/2007 |
| 7187949 | Multiple basestation communication system having adaptive antennas A communication system has a first plurality of wireless basestations having adaptive antennas with a plurality of main array antenna elements for generating a plurality of communication beams. The system further includes a gateway station coupled to the first plura... | 03/06/2007 |
| 7184473 | Equalizers for layered modulated and other signals A method and apparatus for equalizing digital data signals is disclosed. The method comprises the steps of demodulating and decoding an input signal having input data to produce a data output, remodulating the data output to produce a training sequence including an ... | 02/27/2007 |
| 7184500 | Method and system for adaptively combining signals Combining signals includes receiving a plurality of groups of signals at a plurality of antennas at a mobile device, where each group of signals includes a plurality of signals, and each signal includes a time slot. The following is repeated for each group of signal... | 02/27/2007 |
| 7181162 | Communication system using multiple link terminals A communication system has a plurality of bases stations generating communication portions from a base station communication signal. The plurality of base stations are capable of using the entire allocated bandwidth to generate the base station communication portion... | 02/20/2007 |
| 7170924 | System and method for adjusting combiner weights using an adaptive algorithm in wireless communications system Method and apparatus to compute the combiner coefficients for wireless communication systems using an adaptive algorithm. One embodiment trains the weights on a signal known a priori that is time multiplexed with other signals, such as a pilot signal in a High Data ... | 01/30/2007 |
| 7167704 | Communication system using multiple link terminals for aircraft A communication system has a communication infrastructure and a gateway station communicating a communication signal to the communication infrastructure. An airplane having an antenna coupled to a processing circuit for establishing a plurality of multiple communica... | 01/23/2007 |
| 7162397 | Decoding an alternator output signal An engine diagnostic system is provided that enables a service technician to evaluate engine cylinder contribution to output power. The service technician couples one or more signal leads to the vehicle's battery, alternator, or accessory receptacle (e.g., cigarette... | 01/09/2007 |
| 7155231 | Transmit pre-correction in a wireless communication system Techniques for pre-correction of transmit signals are disclosed. In one aspect, a transmit antenna array configurable to generate multiple transmit beams is deployed. The parameters for configuring the antenna array are computed in response to channel estimates and ... | 12/26/2006 |
| 7151740 | Transmit power control for an OFDM-based wireless communication system An open loop power control system for an orthogonal frequency division modulation (OFDM)-based fixed/mobile wireless system. A preferred system and method comprise measuring signal strength of received interference-free pilot tones transmitted by a base station; det... | 12/19/2006 |
| 7142583 | Receiver with plural detecting processors A receiver for detecting and recovering data from received data bearing radio signal samples comprises first and second detecting processors. Each of the detecting processors comprises a data store operable to store a predetermined number of the signal samples, an e... | 11/28/2006 |
| 7142830 | Adaptive transceiver system A method for forming signals at a transceiver having at least two transmit and receive chains, the method comprising the steps of: (a) determining the phase difference and relative amplitude of signals from a set comprising a plurality of mobile stations as received... | 11/28/2006 |
| 7130365 | Baseband processing method based on smart antenna and interference cancellation This invention discloses a baseband processing method based on smart antenna and interference cancellation. The method includes the steps of: A. making a channel estimation to get a channel response; B. picking up useful symbolic level signals from received digital ... | 10/31/2006 |
| 7117018 | Array beamforming with wide nulls A method and implementation of wireless communication are disclosed in which wireless signals are exchanged between at least one remote client and a directional antenna array associated with a wireless network, wherein the directional antenna array includes a plural... | 10/03/2006 |
| 7116267 | Method for generating calibration signals for calibrating spatially remote signal branches of antenna systems The invention concerns a method for generating calibration signals for calibrating spatially remote signal branches of antenna systems. In accordance with the invention, a base signal is generated by mean of a timer and is fed to a distributor unit for distribution ... | 10/03/2006 |
| 7109918 | Nonlinear beam forming and beam shaping aperture system This invention exploits the synchronization properties of coupled, nonlinear oscillators arrays to perform power combining, beam steering, and beam shaping. This architecture utilizes interactions between nonlinear active elements to generate beam patterns. A nonlin... | 09/19/2006 |
| 7106689 | OFDM transmission/reception apparatus Modulation section 201 performs modulation processing on transmission data. Mapping control section 202 controls mapping of the baseband signal onto the subcarriers so that the important information conventionally transmitted by one subcarrier is trans... | 09/12/2006 |
