Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7324606 | Computationally efficient system and method for channel estimation A system and method is provided for determining a channel estimate utilizing partial channel estimates to provide an aggregated channel estimate. A partial channel estimate is determined upon receipt of a data burst, such that a different subset of the channel estim... | 01/29/2008 |
| 7292670 | System and method for automatically correcting duty cycle distortion In accordance with the teachings described herein, systems and methods are provided for automatically correcting duty cycle distortion. A slicer may be used to receive a data input signal and compare the data input signal with a slicer offset voltage to generate a s... | 11/06/2007 |
| 7289570 | Wireless communications A wireless system (e.g., Bluetooth, WCDMA, etc.) with multiple antenna communication channel eigenvector weighted transmissions including possibly differing order symbol constellations for differing eigenvectors. Comparison of maximizations of minimum received symbo... | 10/30/2007 |
| 7283586 | Adaptive equalizer matched filter error metric concept and apparatus A correlative error detection system (60) for a signal equalizer (10) that corrects a distorted communications signal. The detection system (60) correlates a sequence of bits in a signal from an FFE and/or a DFE processor (12, 14) with a ... | 10/16/2007 |
| 7277471 | Time-tracking for clustered demodulation elements in a spread spectrum system An apparatus, such as a subscriber unit or a base station within a spread spectrum communication system, provides advanced control over the time-tracking of demodulation elements when unresolvable multipath situations arise. The apparatus provides merge protection t... | 10/02/2007 |
| 7277490 | Apparatus for converting PCM signal An apparatus for converting pulse code modulation (PCM) signals in a telecommunication system between two different modulation standards. In the apparatus, a channel selector generates a channel select signal for identifying at least one channel of the multiple chan... | 10/02/2007 |
| 7274731 | Non-chronological system statistics A communications device apparatus and method is detailed that allows for improved system statistics gathering of network communication links, dataports, and system status. The improved communications device apparatus and method utilizes a relative time reference or ... | 09/25/2007 |
| 7272192 | Time-reversal block transmit diversity system for channels with intersymbol interference and method A method for diversity transmission and reception for channels with intersymbol interference is created. With this method one can transmit from two or more antennas in such a way that a receiver with one or more antennas can benefit from the diversity offered by the... | 09/18/2007 |
| 7272170 | Single oscillator transceiver A frequency plan is provided for particular use in a transceiver. Advantageously, a single oscillator may be used to generate desired frequency signal. One or more power splitters receive the signal and equally divide the signal into first and second signals having ... | 09/18/2007 |
| 7254165 | Re-configurable decoding in modem receivers Methods and systems provide for operating a modem receiver such as an ADSL modem receiver. As incoming data signals are received, a decoding scheme is selected from a plurality of decoding schemes based on a predetermined downstream data rate. In one approach a soft... | 08/07/2007 |
| 7254201 | Clock and data recovery circuit and method In a clock and data recovery circuit and method, the clock and data recovery circuit comprises a clock signal generator for generating N clock signals, each clock signal having phase difference of 360/N×K from each other, wherein the N denotes an integer and the K ... | 08/07/2007 |
| 7248627 | Method and apparatus for estimating the link quality of a communication channel A link quality estimating method and apparatus adopts a fading value to modify an estimated link quality of a channel thereby obtaining a measure being very close to the real link quality. The method is implemented by utilizing two sequentially received long trainin... | 07/24/2007 |
| 7245681 | Receiving terminal, receiver and receiving method for CDMA system A receiving terminal for CDMA system for receiving received signals from a plurality of signal propagation channels is disclosed. The electric field level of the received signal from each signal propagation channel is judged, and the operation control clock supply t... | 07/17/2007 |
| 7245666 | Soft symbol decoding for MIMO communication systems with reduced search complexity Soft symbol decoder algorithms for multiple input, multiple output (MIMO) receivers reduce the search complexity by searching over fewer than all possible combinations of transmitted symbols to compute log metrics for each transmitted bit from each transmit antenna.... | 07/17/2007 |
| 7245649 | Methods and apparatus for adapting a hop sequence when establishing a communication connection Methods and apparatus are provided for establishing a connection between a scanner device and a pager device over a sequence of hop channels. The scanner device is repetitively activated and a hop channel is selected from the sequence of hop channels as a function o... | 07/17/2007 |
| 7242726 | Parallel concatenated code with soft-in soft-out interactive turbo decoder A method for parallel concatenated (Turbo) encoding and decoding. Turbo encoders receive a sequence of input data tuples and encode them. The input sequence may correspond to a sequence of an original data source, or to an already coded data sequence such as provide... | 07/10/2007 |
| 7242735 | Data recovery system and the method thereof A data recovery system and method is disclosed, which comprises an oversampler, a phase detection circuit, a data pick circuit, a data overlap/skip detection circuit and a data correction circuit. The oversampler oversamples an input signal and thus generates oversa... | 07/10/2007 |
| 7242725 | Adaptive broadband post-distortion receiver for digital radio communication system An adaptive broadband post-distortion receiver for wireless digital communications improves performance of a wireless digital communications system. The improved performance of the system includes improved linear AM-AM and AM-PM responses approaching saturation. Ind... | 07/10/2007 |
| 7236511 | Structured adaptive frequency hopping The invention generally provides a method of intelligent frequency hopping such as in Bluetooth and Home RF networks. The method (100) includes the acts of sampling a plurality of channels in a frequency band and identifying each channel as a good channels or... | 06/26/2007 |
| 7236547 | Start-up automatic frequency control (AFC) method and apparatus Method and apparatus for adjusting the frequency of a voltage controlled oscillator (VCO) at a receiver to synchronize the receiver with the transmitter by correlating a synchronization code channel with training sequences to estimate positive and negative offsets w... | 06/26/2007 |
| 7233620 | Bandwidth-efficient wireless network modem Wireless communication network dynamically assigning communicators to allocated channels by considering the interference and noise environment to maximize the number of communicators and effective bandwidth of the channel. The present invention provides a digital wi... | 06/19/2007 |
| 7230994 | Multi-level modulation apparatus, multi-level demodulation apparatus, multi-level modulation/demodulation communication system, program and modulation/demodulation method In a QAM modulation system, (3p+1) or (3p+2) input signal strings, where p is an integer not less than 3 or 2, are converted into three (p+1) string signals which are then allocated to three phase planes. The converted three (p+1) string signals are time-division mu... | 06/12/2007 |
| 7231005 | Symbol reliability determination and symbol pre-selection based on reliability criteria A method and apparatus for processing demodulated data comprising received symbol data is disclosed. A decoder is used to compute estimated symbols and corresponding reliability metrics. The reliability metrics are transformed into reliability weights. Optionally, r... | 06/12/2007 |
| 7224759 | Methods and apparatus for delay free phase shifting in correcting PLL phase offset An apparatus eliminates a differential phase shift, Δθ(f), between a double sideband suppressed carrier modulated angular rate information signal and its sinusoidal demodulation reference signal in a gyroscope angular rate sensing circuit including a signal refere... | 05/29/2007 |
| 7224721 | System for direct acquisition of received signals Signal processing architectures for direct acquisition of spread spectrum signals using long codes. Techniques are described for achieving a high of parallelism, employing code matched filter banks and other hardware sharing. In one embodiment, upper and lower sideb... | 05/29/2007 |
| 7218671 | Equalizer for a VSB receiver enabling equalizations using segment synchronization information An equalizer for a VSB receiver, which enables equalizations using segment synchronization information, has an extraction unit extracting the segment synchronization information included in the VSB broadcast signal, a storage unit storing the extracted segment synch... | 05/15/2007 |
| 7209529 | Doppler compensated receiver A receiver includes a controller which receives A/D sampled input signals and shifts the sampled digital signal to compensate for Doppler effect in the input signal prior to demodulation. The controller compensates for a Doppler increased frequency by shifting the s... | 04/24/2007 |
| 7203248 | Impairment sensitive selection of constellation points for communication across a channel An impairment compensation sequence for use in a communications system susceptible to one or more potential impairments each periodic in an integer number of symbols includes N phases, wherein N is selected such that each potential impairment, if present, is periodi... | 04/10/2007 |
| 7200189 | Method and system for providing adaptive timing recovery for low power application A system for providing adaptive timing recovery is provided. In an exemplary embodiment, the system includes a fractional resampler, an error function module and a loop filter, arranged collectively to form a timing recovery loop. In an initial mode, the error funct... | 04/03/2007 |
| 7200194 | Receiver signal dynamic range compensation based on received signal strength indicator A method for processing a received signal at a mobile receiver of a wireless communications system is disclosed. The method comprises demodulating the received signal to obtain an analog base band signal and converting the analog base band signal into a digital base... | 04/03/2007 |
| 7200169 | DSL modem apparatus and initialization method for DSL communication An ADSL modem apparatus including an IFFT unit that performs an inverse fast Fourier transform on transmission data, an FFT unit that performs a fast Fourier transform on reception data, and a processor that performs an initialization sequence according to a protoco... | 04/03/2007 |
| 7194049 | Digital automatic level control system A digital automatic level control system employs delay elements, which enable information about a signal parameter from the past, present and future to be processed to provide an optimal gain that can be used to level rapidly varying signals, such as bursty signals.... | 03/20/2007 |
| 7187732 | Start-up automatic frequency control (AFC) method and apparatus Method and apparatus for adjusting the frequency of a voltage controlled oscillator (VCO) at a receiver to synchronize the receiver with the transmitter by correlating a synchronization code channel with training sequences to estimate positive and negative offsets w... | 03/06/2007 |
| 7187709 | High speed configurable transceiver architecture One or more configurable transceivers can be fabricated on an integrated circuit. The transceivers contain various components having options that can be configured by turning configuration memory cells on or off. The integrated circuit may also contain programmable ... | 03/06/2007 |
| 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 |
| 7177341 | Ultra wide bandwidth noise cancellation mechanism and method A mechanism and method are provided for self-canceling noise generated in a UWB receiver and for providing multi-mode operation for the receiver. Noise is canceled by generating a first set of wavelets in a same phase as an incoming signal, and a second set of wavel... | 02/13/2007 |
| 7142619 | Long subscriber loops using automatic gain control mid-span extender unit Systems and methods are described for long subscriber loops using automatic gain control. A method includes extending a digital subscriber loop including: producing an output signal in a first direction from a variable gain amplifier at a mid-span extender unit resp... | 11/28/2006 |
| 7139343 | Digital radio receiver The present invention is to provide a digital radio receiver using a carrier offset compensating circuit capable of compensating for carrier offsets even in a TDD communication system, and extending the range that can cope with offset frequencies to secure stable op... | 11/21/2006 |
| 7127016 | Nonuniform oversampled filter banks for audio signal processing A non-uniform filter bank is created by joining sections of oversampled uniform filter bands that are based on complex exponential modulation (as opposed to cosine modulation). Each filter bank handles a given, non-overlapping frequency band. The bands are not of un... | 10/24/2006 |
| 7120216 | Data/clock recovery circuit for recovering data and clock signal with high accuracy A data/clock recovery circuit can recover high-rate data using the data as a clock signal. It includes an edge detector, a clock selection signal generating circuit, a clock selection circuit and a synchronizing circuit. The edge detector generates edge position inf... | 10/10/2006 |
