A device generates a symbol sequence by performing adaptive equalization by an estimation inverse transfer function of a transmission line on a reception signal sequence extracted from the transmission line, and performing provisional determination on the symbol sequence generated; generates a plurality of the symbol sequences indicating transmission line states in a range of a provisional determination symbol provisionally determined and nearby symbols of the provisional determination symbol; generates, based on the plurality of the symbol sequences indicating the transmission line states generated and an estimation transfer function of the transmission line, an estimation reception symbol sequence for each of the transmission line states; calculates a metric between the symbol sequence obtained from the reception signal sequence and each of a plurality of the estimation reception symbol sequences; selects a most likelihood estimation reception symbol sequence of the plurality of the estimation reception symbol sequences, based on the calculated metric, the provisional determination symbol, and the nearby symbols of the provisional determination symbol; and determines a transmission symbol sequence.

An apparatus including a receiver coupled to receive an input signal from a communication link and operable to employ decision feedback equalization to the input signal of the communication link and generate an edge sample signal. The apparatus also includes a timing recovery module coupled to the receiver and operable to receive the edge sample signal and use the edge sample signal to generate a data sampling phase signal, wherein the edge sample signal influences a settling point of the data sampling phase signal.

A multiple-input multiple-output (MIMO) receiver comprises a MIMO frequency-domain equalizer, which comprises a MMSE filter for mitigating inter-symbol interference and an adder for mitigating inter-antenna interference, a MIMO detector and a MIMO decoder for processing a received MIMO signal and for estimating transmit bits. The receiver comprises a feedback path from the decoder to the detector for providing soft-information on the transmit bits to the detector and an additional feedback path from the decoder to the MIMO frequency-domain equalizer for providing soft-information to the MMSE filter and to the adder of the equalizer.

A receiver for data recovery from a channel signal of a communications channel. The receiver includes a quantization circuit to generate a quantized code corresponding to the channel signal. A first decision circuit recovers, in a first signal processing mode, digital data for the channel signal based on the quantized representation of the channel signal. A second decision circuit recovers, in a second signal processing mode, the digital data for the channel signal based on the quantized representation of the channel signal. A controller selects between the first signal processing mode and the second signal processing mode based on a parameter indicative of a signal quality of the channel signal.

A device generates a symbol sequence by performing adaptive equalization by an estimation inverse transfer function of a transmission line on a reception signal sequence extracted from the transmission line, and performing provisional determination on the symbol sequence generated; generates a plurality of the symbol sequences indicating transmission line states in a range of a provisional determination symbol provisionally determined and nearby symbols of the provisional determination symbol; generates, based on the plurality of the symbol sequences indicating the transmission line states generated and an estimation transfer function of the transmission line, an estimation reception symbol sequence for each of the transmission line states; calculates a metric between the symbol sequence obtained from the reception signal sequence and each of a plurality of the estimation reception symbol sequences; selects a most likelihood estimation reception symbol sequence of the plurality of the estimation reception symbol sequences, based on the calculated metric, the provisional determination symbol, and the nearby symbols of the provisional determination symbol; and determines a transmission symbol sequence.

A receiver for data recovery from a channel signal of a communications channel. The receiver includes a quantization circuit to generate a quantized code corresponding to the channel signal. A first decision circuit recovers, in a first signal processing mode, digital data for the channel signal based on the quantized representation of the channel signal. A second decision circuit recovers, in a second signal processing mode, the digital data for the channel signal based on the quantized representation of the channel signal. A controller selects between the first signal processing mode and the second signal processing mode based on a parameter indicative of a signal quality of the channel signal.

A receiver for data recovery from a channel signal of a communications channel. The receiver includes a quantization circuit to generate a quantized code corresponding to the channel signal. A first decision circuit recovers, in a first signal processing mode, digital data for the channel signal based on the quantized representation of the channel signal. A second decision circuit recovers, in a second signal processing mode, the digital data for the channel signal based on the quantized representation of the channel signal. A controller selects between the first signal processing mode and the second signal processing mode based on a parameter indicative of a signal quality of the channel signal.

A maximum likelihood sequence estimation circuit includes: a signal extraction unit that estimates a reception sample signal including a preceding wave component and a reception sample signal including a delayed wave component from a plurality of reception sample signals sampled from a reception signal at sample intervals shorter than symbol intervals, and extracts, based on an estimation result, both first reception sample signals and second reception sample signals from the plurality of reception sample signals at the symbol intervals; and a maximum likelihood sequence estimation unit that estimates a maximum likelihood sequence using the first reception sample signals extracted and the second reception sample signals extracted.

A maximum likelihood sequence estimation circuit includes: a signal extraction unit that estimates a reception sample signal including a preceding wave component and a reception sample signal including a delayed wave component from a plurality of reception sample signals sampled from a reception signal at sample intervals shorter than symbol intervals, and extracts, based on an estimation result, both first reception sample signals and second reception sample signals from the plurality of reception sample signals at the symbol intervals; and a maximum likelihood sequence estimation unit that estimates a maximum likelihood sequence using the first reception sample signals extracted and the second reception sample signals extracted.

A receiver for data recovery from a channel signal of a communications channel. The receiver includes a quantization circuit to generate a quantized code corresponding to the channel signal. A first decision circuit recovers, in a first signal processing mode, digital data for the channel signal based on the quantized representation of the channel signal. A second decision circuit recovers, in a second signal processing mode, the digital data for the channel signal based on the quantized representation of the channel signal. A controller selects between the first signal processing mode and the second signal processing mode based on a parameter indicative of a signal quality of the channel signal.