6 results about "Feedforward filter" patented technology

The invention provides a sequence detection device which comprises a feed-forward filter and a sequence detection circuit. The feed-forward filter is used for processing a received signal to generate an equalized signal. The sequence detection circuit is used for carrying out sequence detection on the equalization signal to generate and output a symbol sequence. The sequence detection circuit comprises a region estimation circuit and a grid selection circuit. The region estimation circuit is configured to classify each of a plurality of samples included in the equalized signal into one of a plurality of regions. The grid selection circuit is used for selecting one of a plurality of grid schemes to perform branch metric calculation according to the area estimation results of two of the plurality of samples output by the area estimation circuit.

A sequence detection device includes a feed-forward filter, a feedback filter, a combining circuit, a decision circuit, and a sequence detection circuit. The feed-forward filter processes a received signal to generate a first equalized signal. The feedback filter processes a symbol decision signal to generate a second equalized signal. The combining circuit combines the first and second equalized signals to generate a sample signal. The decision circuit performs hard decision upon the sample signal to generate the symbol decision signal. The sequence detection circuit performs sequence detection upon the first equalized signal, and includes a region estimation circuit and a trellis selection circuit. The region estimation circuit is independent of the decision circuit, and categorizes each sample of the sample signal into one region. The trellis selection circuit selects one trellis scheme for branch metric calculation according to region estimation results output from the region estimation circuit.

The invention provides a sequence detection device and a sequence detection method. The sequence detection device comprises a feed-forward filter, a feedback filter, a combining circuit, a decision circuit and a sequence detection circuit. The feed-forward filter processes a received signal to generate a first equalized signal. The feedback filter processes the symbol decision signal to generate a second equalized signal. The combining circuit combines the first and second equalized signals to generate a sample signal. The decision circuit performs a hard decision on the sample signal to generate the symbol decision signal. The sequence detection circuit performs sequence detection on the first equalization signal and comprises a region estimation circuit and a grid selection circuit. The region estimation circuit classifies each sample in the sample signal into a region. The grid selection circuit selects a grid scheme for branch metric calculation according to the area estimation result output by the area estimation circuit.

A sequence detection device includes a feed-forward filter and a sequence detection circuit. The feed-forward filter processes a received signal to generate an equalized signal. The sequence detection circuit performs sequence detection upon the equalized signal to generate and output a symbol sequence. The sequence detection circuit includes a region estimation circuit and a trellis selection circuit. The region estimation circuit categorizes each of samples included in the equalized signal into one of regions. The trellis selection circuit selects one of trellis schemes for branch metric calculation according to region estimation results of two of the samples output from the region estimation circuit.

A sequence detection device includes a feed-forward filter and a sequence detection circuit. The feed-forward filter processes a received signal to generate an equalized signal. The sequence detection circuit performs sequence detection upon the equalized signal to generate and output a symbol sequence. The sequence detection circuit includes a region estimation circuit and a trellis selection circuit. The region estimation circuit categorizes each of samples included in the equalized signal into one of regions. The trellis selection circuit selects one of trellis schemes for branch metric calculation according to region estimation results of two of the samples output from the region estimation circuit.

This utility model discloses a dual-feed over-ear noise-canceling headphone, relating to the field of over-ear noise-canceling headphone technology. It includes an earphone shell, with a speaker mounting shell internally connected to it. A speaker is mounted on the right side of the speaker mounting shell, and a silicone pad is attached to the outer side of the speaker mounting shell. A bracket is rotatably connected to the outside of the earphone shell, and an extension bracket is slidably connected to the inner side of the bracket. A noise-canceling component is mounted on the other side of the speaker mounting shell. This dual-feed over-ear noise-canceling headphone uses a feedforward microphone and a feedback microphone to collect external ambient noise and residual noise within the earcups, respectively. The earphone shell also houses a speaker for playing audio signals and processed noise-canceling signals. The headphone includes a noise-canceling control circuit, including a feedforward filter and a feedback filter, which process the noise signals collected by the feedforward and feedback microphones, respectively.