| Patent Number |
Title Of Patent |
Date Issued |
| 7433434 |
Communication channel tracking apparatus |
October 7, 2008 |
| Apparatus are provided for a communication signal processing apparatus having a channel estimator configured to generate a first channel estimation at a first time point, a linear predictor coupled to the channel estimator, and an adaptive filter coupled with the linear predictor. Th |
| 7356075 |
Method and apparatus for signal separation |
April 8, 2008 |
| An embodiment of a method for parameterizing an input signal includes non-linearly transforming the input signal, removing higher order terms by passing the input signal through a low pass filter to produce a linear combination of data symbols and DC components, solving for the DC co |
| 7327777 |
Method and apparatus for distributed polyphase spread spectrum communications |
February 5, 2008 |
| Methods and apparatus are provided for distributed polyphase spread spectrum communication and non-contiguous spectrum underlay. The method includes polyphase channelizing a direct sequence spread spectrum (DSSS) signal, determining available spectrum in an observed frequency range h |
| 6591084 |
Satellite based data transfer and delivery system |
July 8, 2003 |
| A high speed data transfer system includes a WAU (201) which is utilized to provide high speed data access to satellite transferred data. The system is configured such that a plurality of data utilization devices (205) may access the high speed data via wireless links to the WAU (201). |
| 6487252 |
Wireless communication system and method for synchronization |
November 26, 2002 |
| An orthogonal frequency division multiplexed wideband communication system provides improved time and frequency synchronization by inserting an unevenly spaced pilot sequence within the constellation data. A receive correlates the received data using the unevenly spaced pilot sequence. T |
| 6359901 |
Method and apparatus for asynchronous adaptive protocol layer tuning |
March 19, 2002 |
| An apparatus is disclosed for continuous load optimization of wireless communication networks by making use of statistical data about both the communication medium characteristics and the characteristics of messages that users desire to send over the network. The network comprises a |
| 6240282 |
Apparatus for performing non-linear signal classification in a communications system |
May 29, 2001 |
| A non-linear signal classifier (26) includes a polynomial expansion unit for expanding signal feature vectors determined by a feature extraction unit (25) for a received signal. The expanded signal feature vectors are each combined with a plurality of signal classification models that ar |
| 6131013 |
Method and apparatus for performing targeted interference suppression |
October 10, 2000 |
| The invention relates to a communication system (300) having a receiver (304) that is capable of performing targeted interference suppression. An interference classifier (314) within the receiver (304) analyzes a signal received from a channel (306) and identifies and classifies interfer |
| 6122309 |
Method and apparatus for performing interference suppression using modal moment estimates |
September 19, 2000 |
| The invention relates to a communication system (300) having a receiver (304) that is capable of performing targeted interference suppression. An interference classifier (314) within the receiver (304) analyzes a signal received from a channel (306) and identifies and classifies interfer |
| 6118805 |
Method and apparatus for performing frequency hopping adaptation |
September 12, 2000 |
| The invention relates to a communication system (300) having a receiver (304) that is capable of performing targeted interference suppression. An interference classifier (314) within the receiver (304) analyzes a signal received from a channel (306) and identifies and classifies interfer |
| 6084919 |
Communication unit having spectral adaptability |
July 4, 2000 |
| The present invention relates to a communications system (100) that is capable of adapting to an unknown or varying spectral environment in a channel (14) between two communications units (12, 16). The system (100) maintains a spectral profile of the channel (14) and uses the spectral |
| 5809459 |
Method and apparatus for speech excitation waveform coding using multiple error waveforms |
September 15, 1998 |
| A method and apparatus (100) for pitch-epoch-synchronous source-filter speech encoding by means of error component modeling methods (310) which capture fundamental orthogonal (uncorrelated) basis elements of an excitation source waveform. A periodic waveform model (318) along with fo |
| 5794186 |
Method and apparatus for encoding speech excitation waveforms through analysis of derivative dis |
August 11, 1998 |
| A vocoder device and corresponding method characterizes and reconstructs speech excitation. An excitation analysis portion performs a cyclic excitation transformation process on a target excitation segment by rotating a peak amplitude to a beginning buffer location. The excitation ph |
| 5794185 |
Method and apparatus for speech coding using ensemble statistics |
August 11, 1998 |
| A speech coder (100) computes scalar statistics (180), ensemble statistics (190), spectral parameters (150), and a normalized excitation waveform (270) which describe a frame of speech samples. The coder (100) encodes the statistics (220, 230), spectral parameters (155), and the normaliz |
| 5737716 |
Method and apparatus for encoding speech using neural network technology for speech classificati |
April 7, 1998 |
| A low-rate voice coding method and apparatus uses vocoder-embedded neural network techniques. A neural network controlled speech analysis processor includes a neural network which manages speech characterization, encoding , decoding, and reconstruction methodologies. The voice coding met |
| 5727125 |
Method and apparatus for synthesis of speech excitation waveforms |
March 10, 1998 |
| A speech vocoder device and corresponding method synthesizes speech excitation waveforms. The method entails reconstructing (216) an excitation target from decoded speech data, creating (220) aligned excitation segments by normalizing (296), correlating (298), and aligning (300) a so |
