Armando Juan Vigil, Age 621963 S Prairie Dunes Ct, Oviedo, FL 32765

7006581, Feb 28, 2006

May 25, 2001

09/866539

Armando J. Vigil - Altamonte Springs FL, US

H03K 9/00
H04B 1/69
H03H 7/30

375316, 375148, 375232, 375147

A method for demodulating a received digitally modulated signal subjected to multipath propagation impairment includes estimating the multipath propagation impairment of the received digitally modulated signal using a channel estimator, and estimating at least one symbol of the received digitally modulated signal using a symbol estimator. The at least one estimated symbol is adjusted based upon the estimated multipath propagation impairment to generate an estimate of the at least one symbol as impaired by the multipath propagation. At least one error signal is generated by comparing the estimate of the at least one symbol as impaired by the multipath propagation to the received digitally modulated signal. The at least one error signal is used for estimating remaining symbols to be demodulated and for refining the estimated multipath propagation impairment.

7187726, Mar 6, 2007

Oct 19, 2005

11/253304

Armando J. Vigil - Altamonte Springs FL, US

H03K 9/00
H03H 7/30
H03B 1/00

375316, 375231, 375147

A method for demodulating a received digitally modulated signal subjected to multipath propagation impairment includes estimating the multipath propagation impairment of the received digitally modulated signal using a channel estimator, and estimating at least one symbol of the received digitally modulated signal using a symbol estimator. The at least one estimated symbol is adjusted based upon the estimated multipath propagation impairment to generate an estimate of the at least one symbol as impaired by the multipath propagation. At least one error signal is generated by comparing the estimate of the at least one symbol as impaired by the multipath propagation to the received digitally modulated signal. The at least one error signal is used for estimating remaining symbols to be demodulated and for refining the estimated multipath propagation impairment.

7215719, May 8, 2007

Oct 19, 2005

11/254107

Armando J. Vigil - Altamonte Springs FL, US

H03K 9/60
H03H 7/30
H04B 1/00
H04B 7/10
H03D 1/04

375316, 375231, 375147, 375346, 375347

A method for demodulating a received digitally modulated signal subjected to multipath propagation impairment includes estimating the multipath propagation impairment of the received digitally modulated signal using a channel estimator, and estimating at least one symbol of the received digitally modulated signal using a symbol estimator. The at least one estimated symbol is adjusted based upon the estimated multipath propagation impairment to generate an estimate of the at least one symbol as impaired by the multipath propagation. At least one error signal is generated by comparing the estimate of the at least one symbol as impaired by the multipath propagation to the received digitally modulated signal. The at least one error signal is used for estimating remaining symbols to be demodulated and for refining the estimated multipath propagation impairment.

7477705, Jan 13, 2009

Oct 19, 2005

11/253910

Armando J. Vigil - Altamonte Springs FL, US

H03K 9/60
H03H 7/30

375316, 375231

A method for demodulating a received digitally modulated signal subjected to multipath propagation impairment includes estimating the multipath propagation impairment of the received digitally modulated signal using a channel estimator, and estimating at least one symbol of the received digitally modulated signal using a symbol estimator. The at least one estimated symbol is adjusted based upon the estimated multipath propagation impairment to generate an estimate of the at least one symbol as impaired by the multipath propagation. At least one error signal is generated by comparing the estimate of the at least one symbol as impaired by the multipath propagation to the received digitally modulated signal. The at least one error signal is used for estimating remaining symbols to be demodulated and for refining the estimated multipath propagation impairment.

2003002, Jan 30, 2003

Apr 23, 2001

09/840481

Armando Vigil - Altamonte Springs FL, US
Madjid Belkerdid - Casselberry FL, US

H04N007/12

375/240010, 375/240260

This invention enables improved reception of ATSC terrestrial broadcast digital television signals. ATSC DTV is a standard of the Advanced Television Systems Committee (ATSC) for the terrestrial broadcast of digital television. ATSC DTV broadcast signals are subject to impairment due to multipath. Improved radio reception in multipath is possible when substantial reference components are transmitted as a component of the transmitted radio. However, the introduction of new signal components to the ATSC DTV broadcast signal represents a modification to the standard which weaken the benefits of standardization. This invention resolves this dilemma by carefully introducing data components into the data multiplex in a form compatible with the ATSC DTV standard. Data components are chosen so as to induce a substantial repeating reference component into the ATSC DTV modulation waveform. The induced reference waveform enables clear reception in multipath while the integrity of the standard is preserved.