Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7254171 | Equaliser for digital communications systems and method of equalisation Equalisation of a communication channel is achieved through use of a Wiener filter frequency response mechanism that operates to transform at least a portion of a data stream generated from a plurality of space time coded (STC) symbol streams received from a plurali... | 08/07/2007 |
| 7190720 | Tap weight initializer for an adaptive equalizer Initial values of the tap weights for the taps of a linear equalizer are determined based on a channel impulse response of a channel so that the values corresponding to the weights of the equalizer taps achieve optimum initialization of the equalizer. These values a... | 03/13/2007 |
| 6993544 | Limit-cycle oscillation suppression method, system, and computer program product Limit-cycle oscillations are caused by the compounding of quantization errors that occurs when previous digital filter outputs are used as inputs to the digital filter for the current operation. Where a signal in a digital waveform has become a constant common value... | 01/31/2006 |
| 6915319 | Method and apparatus for interpolating digital signal The present invention relates to an interpolation method and an interpolation apparatus for a digital audio signal or a digital image signal that has a predetermined sampling cycle and quantization bit length, and in particular, to an interpolation method and an int... | 07/05/2005 |
| 6857002 | Integrated circuit with a mode control selecting settled and unsettled output from a filter In a signal processing integrated circuit having an analog to digital converter and a digital filter having a plurality of taps separated in time, when starting a conversion after a reset or a change of input channel, the filter will have an incomplete set of input ... | 02/15/2005 |
| 6804694 | Adaptive equalizer with gain controlled initialization Initialization of an adaptive equalizer is controlled by varying a gain applied to an input signal. The input signal may be an alternate mark inversion signal. The gain is applied to the input signal to form an amplified signal. An autocorrelation value of the ampli... | 10/12/2004 |
| 6628707 | Adaptive equalizer system for short burst modems and link hopping radio networks A method for an adaptive equalization apparatus in a multiple-link hopping radio system includes hopping among a plurality of radio links to receive variable-length bursts of radio signals on the plurality of radio links and equalizing amplitude and phase... | 09/30/2003 |
| 6584150 | Dual direction channel estimator In the Global System for Mobile Communication (GSM), an improvement in estimating the channel impulse response (CIR) is obtained by starting up two channel estimators using the midamble and obtaining channel estimations with split burst. The two estimatio... | 06/24/2003 |
| 6483872 | Method and apparatus for reducing convergence time A method and apparatus for reducing convergence time in a digital filter. When the digital filter is initially run, the coefficients in the digital filter are adjusted to reduce error in the output of the digital filter. When the adjusted coefficients mee... | 11/19/2002 |
| 6445734 | System and method of validating equalizer training Equalizer training is validated by techniques to detect false training. The validation techniques involve checking the unique time domain energy shaping of a plurality of taps of a trained equalizer of a modem for good training. The energy measure for eac... | 09/03/2002 |
| 6320901 | Method for fast off-line training for discrete multitone transmissions A method of calculating TEQ and FEQ coefficients in a discrete multi-tone (DMT) system includes determining an estimated channel impulse response. A frame delay is determined based upon the estimated channel impulse response. Using these parameters and a ... | 11/20/2001 |
| 5898731 | Auto-coefficient renewal digital channel equalizer An auto-coefficient renewal digital channel equalizer is disclosed, including an auto-coefficient renewing device for automatically renewing a coefficient using received data and an error signal, an error detecting device for detecting an error signal fro... | 04/27/1999 |
| 5877971 | Digital signal processing Digital signal processing (e.g. filtering) apparatus comprises pipelined digital signal processing means for generating each output sample of an output digital signal from input samples of an input digital signal by combining the input samples with a plur... | 03/02/1999 |
| 5805696 | Echo canceller adaptation technique A device for providing conferencing communications. The device comprises: a summing circuit for forming a signal sum equal to a sum of signals received from at least three information signal sources along with an echo compensation signal, the signal recei... | 09/08/1998 |
| 5712808 | Digital signal processing Digital signal processing (e.g. filtering) apparatus comprises pipelined digital signal processing means for generating each output sample of an output digital signal from input samples of an input digital signal by combining the input samples with a plur... | 01/27/1998 |
| 5550862 | Method and apparatus for centering equalizer taps A method and apparatus for a decision-directed timing recovery scheme to stabilize its equalizer positioning by centering equalizer taps is disclosed. First, the measure of equalizer positioning is calculated. The measure is then scaled to generate a timi... | 08/27/1996 |
| 5535367 | Demultiplexing initialization data to be transferred to memory through a plurality of registers with error detection data Initialization data is received by a memory multiplexer (MEMMUX) and stored in a plurality of registers of the MEMMUX without reading data from memory. The storage of the initialization data in the MEMMUX registers may be sequential or simultaneous. The i... | 07/09/1996 |
| 5532950 | Dynamic digital filter using neural networks The present invention provides an apparatus for decoding and classifying a digital audio input signal and for reconstructing the digital audio input signal, so that when the reconstructed signal is converted to an analog signal by a digital to analog conv... | 07/02/1996 |
| 5290965 | Asynchronous waveform generating device for use in an electronic musical instrument A waveform generating device applicable to musical tone generating circuitry employed in electronic musical instruments is disclosed. The device digitally stores sampled waveform data. The data is read out and the musical tone having a different pitch is ... | 03/01/1994 |
| 5199047 | Receiver for a digital transmission system A receiver for a digital transmission system in which transmitted data contain a training data sequence, and the receiver stores a copy of that sequence as it was transmitted. A channel impulse response is estimated based on this stored copy. The received... | 03/30/1993 |
| 4841461 | Filter adjustment apparatus and method A filter adjustment apparatus adjusts the properties of a filter by changing, for example, the circuit constants of a filter connected in series with a signal processing circuit to correspond with desired optimum properties of the filter. The state of the... | 06/20/1989 |
| 4468786 | Nonlinear equalizer for correcting intersymbol interference in a digital data transmission system A non-linear equalizer corrects for intersymbol interference in a digital data transmission system by introducing baud rate samples into an N-stage tapped delay line and provision is made for storing a sequence of M prior decisions in a prior decision reg... | 08/28/1984 |
| 4152649 | Channel equalization apparatus and method using the Fourier transform technique A method of and apparatus for determining during an initial training period the initial values of the coefficients of a transversal equalizer in a data transmission system in which the transmission channel creates frequency shift. The received periodic tr... | 05/01/1979 |
| 4089061 | Method and apparatus for determining the initial values of the coefficients of a complex transversal equalizer A method for determining the initial values of the coefficients of a complex transversal equalizer in a synchronous data transmission system employing Double Side Band-Quadrature Carrier (DSB-QC) modulation on a transmission channel having variable distor... | 05/09/1978 |
| 4058713 | Equalization by adaptive processing operating in the frequency domain Equalization apparatus for a communication system transmitting through a time or frequency spread medium. The message to be transmitted is partitioned and transmitted in burst or frame by frame form. Each frame comprises the message (unknown at the receiv... | 11/15/1977 |
| 4047013 | Method and apparatus for fast determination of initial transversal equalizer coefficient values A method for determining the initial values of the coefficients of a transversal equalizer for a synchronous data transmission system, wherein a training sequence is transmitted to allow the equalizer coefficients to be adjusted to optimum initial values.... | 09/06/1977 |
| 4027258 | Time domain automatic equalizer with frequency domain control An automatic equalizer for calculating the equalization transfer function and applying same to equalize signals received from a transmission channel. Time domain equalization is achieved using a transversal filter whose tap weights are calculated in the f... | 05/31/1977 |
| 4006352 | Equalizer comprising first and second equalizing means and trainable in two steps An equalizer comprises a tapped delay line of a transversal filter and first equalizing means responsive to a short pseudo-noise train supplied thereto for adjusting tap gains so as to make the transversal filter output signals simulate a pseudo-noise tra... | 02/01/1977 |
