Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 7656932 | Digital receiver device A digital processing device for a modulated signal, arranged at the input of a radio frequency receiver chain, suited in particular to a transmission system a direct sequence spread spectrum operation, comprising an analog-to-digital converter performing undersampli... | 02/02/2010 |
| 7489721 | Simplified block linear equalizer with block space time transmit diversity The present invention is a method and system for receiving data transmitted using block space time transmit diversity (BSTTD) in a code division multiple access (CDMA) communication system. The system comprises a transmitter, for transmitting a first data field usin... | 02/10/2009 |
| 7424050 | Matched filter circuit and correlation calculation method There are provided input route selecting means 711-713 and 723-725 for selecting, in accordance with the oversampling phase, input routes along which reception data and codes are to be input to individual shift register means, a plurality... | 09/09/2008 |
| 7418065 | Multicarrier receivers and methods for detecting cyclic prefixes having unknown lengths A multicarrier receiver sequentially correlates two training symbols to determine a length of a cyclic prefix associated with each of the training symbols. ... | 08/26/2008 |
| 7412018 | Rapid acquisition synchronization sequences for direct sequence spread spectrum systems using code time offsets In a wireless communication system which includes a synchronization signal generator which generates a synchronization sequence, an RF transmitter which transmits the synchronization signal, and one or more receiver that receives the signal, where the synchronizatio... | 08/12/2008 |
| 7412014 | Timing-adjusting method and apparatus, and diversity receiving method and apparatus An A-D conversion unit performs analog-to-digital conversions on baseband signals. A correlation processing unit carries out a correlation processing. A power computing unit computes the power of correlation values. An inter-signal condition determining unit compare... | 08/12/2008 |
| 7406113 | Integrated circuit for code acquisition A semiconductor integrated circuit for processing a plurality of received broadcast signals, such as GPS signals, is operable in two modes: acquisition and tracking. In an acquisition mode, sample reducer combines samples of a received signal for correlation with a ... | 07/29/2008 |
| 7403558 | Integrated circuit for code acquisition A semiconductor integrated circuit for processing a plurality of received broadcast signals, such as GPS signals, is operable in two modes: acquisition and tracking. In an acquisition mode, a memory arrangement comprising two circulating shift registers circulates s... | 07/22/2008 |
| 7397842 | Method and apparatus for combining weight computation in a DS-CDMA RAKE receiver A RAKE receiver circuit generates combining weights based on channel estimates and combining statistics that comprise channel coefficient statistics, noise statistics, and channel estimation error statistics. Together, these statistics incorporate the relationships ... | 07/08/2008 |
| 7394873 | Adaptive channel estimation for orthogonal frequency division multiplexing systems or the like Briefly, in accordance with one embodiment of the invention, a channel estimator may be adapted to provide a channel estimate based at least in part on an estimated delay spread. The channel estimator may be adapted to provide a more accurate channel estimation in t... | 07/01/2008 |
| 7388899 | Spreading code structure for ultra wide band communications The ultra wide band communication system of the present invention includes a transmitter (station) and a receiver (station). The transmitter and the receiver employ spreading code comprised of code groups, which respectively comprise varied, auto-correlated codes. C... | 06/17/2008 |
| 7386035 | Method of compensating for energy loss and eliminating inter-symbol interference and inter-chip interference and rake receiver for WLAN adopting the same Provided is a method of compensating for energy loss and eliminating inter-symbol interference (ISI) and inter-chip interference (ISI) in wireless signals, and a rake receiver for wireless LANs adopting the same. The rake receiver compensates for energy loss of a CC... | 06/10/2008 |
| 7372825 | Wireless communications system with cycling of unique cell bit sequences in station communications A wireless communication system (10). The system comprises transmitter circuitry (BST1) comprising circuitry for transmitting a plurality of frames to a receiver in a first cell (Cell 1). Each of the plurality of frames comprises a bit group ( | 05/13/2008 |
| 7372908 | Radio communication method, radio transmitting apparatus, and radio receiving apparatus A duplicating section 11 duplicates a bit sequence to be input, and a 16QAM section 121 modulates a bit sequence of a duplicating source to form a symbol, a 16QAM section 122 modulates the duplicated bit sequence to form a symbol, an S/P section... | 05/13/2008 |
| 7369635 | Rapid discrimination preambles and methods for using the same A system, method and program are disclosed for achieving rapid bit synchronization in low power medical device systems. Messages are transmitted via telemetry between a medical device and a communication device. The synchronization scheme uses a portion of a unique ... | 05/06/2008 |
| 7366243 | Methods and apparatus for transmitting non-contiguous spread spectrum signals for communications and navigation A technique for transmitting a spread spectrum signal using plural non-contiguous frequency bands separated by segments of frequency spectrum excluded from use involves: generating a digital time-domain spread spectrum signal; converting the time-domain signal to a ... | 04/29/2008 |
| 7359428 | VDSL transmission employing multi-code multi carrier CDMA modulation An improved transmission method for high-rate digital communication on unshielded twisted copper pairs for Very-High Speed Digital Subscriber Loop (VDSL) modems. The new modulation scheme is a Multi Code Multi Carrier Code Division Multiple Access, hereafter named M... | 04/15/2008 |
| 7359425 | Ultra-wideband transmitter and receiver, and ultra-wideband wireless communication method An ultra-wideband transmitter and receiver, and a ultra-wideband wireless communication method, which perform ultra-wideband wireless communication by a low-speed digital circuit having a low power consumption and controlling the effect of a multi-pass. In ultra-wid... | 04/15/2008 |
| 7359706 | Data transmission for mobile wireless communication devices A method and apparatus to transmit data between a communication network and a mobile station just before prior to the mobile station switching from a fast data rate mode, such as digital mode, to a slow data rate mode, such as analog mode. The mobile station request... | 04/15/2008 |
| 7356074 | Estimation of multipath channel with sub-chip resolution The present invention provides a method and apparatus for estimating a multipath channel with sub-chip resolution. In general, secondary signals are characterized based on correlating a received signal including multipath signals, which include a main and the second... | 04/08/2008 |
| 7356073 | Method and apparatus providing an advanced MIMO receiver that includes a signal-plus-residual-interference (SPRI) detector A method is disclosed to obtain M final symbol decisions for signals received through N receive antennas that were transmitted in M parallel data layers, using a same spreading code from M transmit antennas. The method includes space-time equalizing the N received s... | 04/08/2008 |
| 7356100 | Estimating channel impulse response and equalizer coefficients in UWB communication systems A method estimates a channel impulse response in an ultra wide bandwidth (UWB) system. Multiple training sequences modulated at a chip rate are received. Each training sequence is sampled by parallel with multiple correlators at sampling rate substantially slower th... | 04/08/2008 |
| 7356094 | Digital broadcast receiving apparatus A digital broadcast receiving apparatus for receiving a broadcast signal generated by combining sub signals modulated using a random sequence generated based on an initial value set in accordance with a frequency of a broadcast channel by a signal transmission contr... | 04/08/2008 |
| 7352830 | Sliding window In an apparatus and method for detecting a preamble in a message a shorter initial average is used to estimate the peak position peak symbol duration, and then the number of subsequent delay stages is reduced to 1 per symbol where the chosen peak position is stored ... | 04/01/2008 |
| 7352794 | Method and arrangement for use in a single user detector for a CDMA multi-path system A method and arrangement for use in a single user detector in a CDMA multi-path system, comprising providing a finite impulse response (FIR) filter; and configuring the FIR filter to derive at least a first, then a second, then a third, then a fourth of the followin... | 04/01/2008 |
| 7349375 | CDMA to packet switching interface for code division switching in a terrestrial wireless system An access radio port is provided that includes means for spreading a payload data signal, extracted from an ATM packet, with a uniquely assigned orthogonal code, means for transmitting the spread payload data signal to one of a group of mobile subscriber terminals l... | 03/25/2008 |
| 7349498 | Method and system for data and edge detection with correlation tables A system and method is disclosed for evaluating a data group of oversampled bits to detect edge transitions and for improving use of information available from a sampled data while maintaining acceptable noise rejection. An edge detection system for receiving a seri... | 03/25/2008 |
| 7342898 | System and method for determining transmission power in a packet data transmission system Disclosed is a system and method for determining a transmission power in a radio packet data transmission system on the basis of the transmission power at the previous packet transmission. A preferred method includes: a step for calculating the transmission power; a... | 03/11/2008 |
| 7342481 | Method and circuit arrangement for wireless data transmission A method and circuit for wireless data transmission between a base station and one or more transponders is provided in which the base station modulates a carrier signal with a modulation signal and transmits it, in which symbols that are to be transmitted are coded ... | 03/11/2008 |
| 7339955 | TDMA communication method and apparatus using cyclic spreading codes Systems and methods of ultra-wideband communication are provided. In one embodiment, an ultra-wideband communication system divides a stream of data conveying symbols into a plurality of unspread substreams. A common spreading code is generated at the ultra-wideband... | 03/04/2008 |
| 7340016 | Equalizers for multi-branch receiver A multi-branch receiver comprises a plurality of signal branches including branch filters to filter respective branch input signals and to produce corresponding branch output signals, a combiner to combine the branch output signals to produce a combined baseband sig... | 03/04/2008 |
| 7327780 | Wireless communications systems and methods for multiple operating system multiple user detection The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One aspect of the invention provides a multiprocessor, multiuser detection ... | 02/05/2008 |
| 7324475 | Radio communication apparatus and method In a radio communication apparatus having a plurality of transmitting and receiving functions that enable simultaneous signal transmission and reception, an arbitrary number of transmitting and receiving functions are assigned to another radio communication apparatu... | 01/29/2008 |
| 7324585 | System and method for performing symbol boundary-aligned search of direct sequence spread spectrum signals System and method for performing symbol boundary aligned searches of signals. A preferred embodiment comprises a search control unit (such as search control unit 725) that can determine a start and stop condition for a correlation based on a hypothesis, a sea... | 01/29/2008 |
| 7319725 | Maximum likelihood detection method using a sequence estimation receiver The invention relates to a detection method using a receiver of a digital communication system for the detection of a symbol from a received signal, which signal is transmitted by a transmitter of the digital communication system, wherein the symbol is a selected sy... | 01/15/2008 |
| 7317753 | Dynamic matched filter bank and its application in multi-channel spread spectrum communication systems A dynamic matched filter bank consists of a plurality of matched filters with either the reference signal for each matched filter changes with the time or the input signal to a matched filter is the received signal modified by a different way for a different matched... | 01/08/2008 |
| 7315567 | Method and apparatus for partial interference cancellation in a communication system A method of partial interference cancellation of a received signal that includes a first data component and a second data component is disclosed. The method includes the steps of determining a characteristic of the communication channel, estimating a factor based up... | 01/01/2008 |
| 7313122 | Multi-user carrier frequency offset correction for CDMA systems “Multiple approaches are presented herein to perform CFO correction within CDMA systems having multiple users. Any communication receiver may be adapted to perform the CFO correction in this manner CDM. One approach assumes a diagonal CFO matrix to decouple the di... | 12/25/2007 |
| 7310382 | Linearized switch-based power amplifier A power amplifier comprises a level-discretization modulator (210) and a mixing and amplifying stage (225), in combination with a properly designed negative feedback path. The feedback path forms an error compensation loop together with a properly sele... | 12/18/2007 |
| 7301993 | Channel estimation in a spread spectrum receiver A method and apparatus for channel estimation in a spread spectrum receiver include processing that begins by despreading a received spread spectrum complex baseband sample utilizing a pseudorandom spreading sequence to produce a despread baseband symbol. The proces... | 11/27/2007 |
