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| Number | Title | Issue Date |
| 6697423 | Precursor decision feedback equalizer (PDFE) A decision feedback equalizer is provided which is capable of canceling precursor Inter-Symbol Interference (ISI) even when knowledge of future data is unavailable. A novel DFE algorithm is utilized whereby the detection signal-to-noise ratio (SNR) is inc... | 02/24/2004 |
| 6661895 | Zero-delay structure for sub-band echo cancellation A zero-delay structure to be used in sub-band echo cancellation systems. In telecommunications, a delay is usually introduced in sub-band decomposition and/or sub-band reconstruction. This invention will help remove this. This structure not only removes t... | 12/09/2003 |
| 6608897 | Double-talk insensitive NLMS algorithm A method of canceling echo signals in a telephone network operating in a double talk mode has been developed. A system for implementing the method is also presented. In the invention the conventional normalized least mean square (NLMS) algorithm for echo ... | 08/19/2003 |
| 6282286 | Nonlinear processor for acoustic echo canceller with background noise preservation and long echo tail suppression A nonlinear processor (NLP) for selectively removing or reducing residual echo signals from an acoustic echo canceller associated with a telephony terminal is provided. Low level background noise and near end speech signals pass through the NLP structure ... | 08/28/2001 |
| 6138244 | Timing recovery with minimum jitter movement A symbol synchronization and timing recovery method for stabilizing jitter in a data receiver is provided. A one tap LMS algorithm is used for a pre-cursor estimate. A dead zone is set around the desired timing location and the local clock in the receiver... | 10/24/2000 |
| 6122652 | Tone and periodical signal detection Algorithms for quickly and efficiently detecting a periodic signal such as a DTMF signal in a telephone system are described. The algorithms, implemented in a tone detector, detect the periodicity of the input data and do not require an estimation of the ... | 09/19/2000 |
