Methods and systems are described for sequentially obtaining a plurality of data streams, the plurality of data streams comprising a data stream in a current condition, a data stream in a skewed-forward condition, and a data stream in a skewed-backward condition, calculating, for each data stream in the plurality of data streams, a corresponding set of cost-function values by obtaining a corresponding set of eye measurements, the eye measurements obtained by adjusting a sampling threshold of a sampler generating a plurality of samples of the data stream, the plurality of samples comprising edge samples and data samples, wherein the data stream is sampled at a rate equal to twice a rate of the data stream and calculating the corresponding set of cost-function values based on the corresponding set of eye measurements, and generating a skew control signal based on a comparison of the sets of calculated cost-function values.

An integrated circuit may include: a first transmission line; a second transmission line; a first compensator circuit suitable for generating a first compensation signal by delaying and differentiating a signal transferred through the second transmission line; a second compensator circuit suitable for generating a second compensation signal by delaying and differentiating a signal transferred through the first transmission line; a first receiver circuit suitable for receiving the signal transferred through the first transmission line, and compensating for the signal transferred through the first transmission line using the first compensation signal; and a second receiver circuit suitable for receiving the signal transferred through the second transmission line, and compensating for the signal transferred through the second transmission line using the second compensation signal.

An integrated circuit may include: a first transmission line; a second transmission line; a first compensator circuit suitable for generating a first compensation signal by delaying and differentiating a signal transferred through the second transmission line; a second compensator circuit suitable for generating a second compensation signal by delaying and differentiating a signal transferred through the first transmission line; a first receiver circuit suitable for receiving the signal transferred through the first transmission line, and compensating for the signal transferred through the first transmission line using the first compensation signal; and a second receiver circuit suitable for receiving the signal transferred through the second transmission line, and compensating for the signal transferred through the second transmission line using the second compensation signal.

The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The disclosure is A first apparatus for estimating a delay time in a synchronization system is provided. The first apparatus includes a detector configured to detect a request signal generated by a second apparatus, and a generator configured to generate a response signal corresponding to the request signal and output the response signal. The request signal is received through a cable from the second apparatus and the response signal is transmitted to the second apparatus through the cable.

Devices and methods are provided for performing a high-frequency jitter self stress check on a receiver to assist with optimization. High-frequency jitter is injected into a clock signal recovered from a received data signal and used to sample the data signal. The injected jitter increases the bit error rate (BER), making BER a more useful and quicker optimization metric in applications using low-noise communication links. Error correction is used to maintain acceptable output BER while the self stress check is in progress.

A method and system for tracking a course of a cable using electromagnetic waves. A first distance between a first transceiver and a second transceiver is determined by determining a total transmission time for a first wireless signal traveling in a linear line from the first transceiver to the second transceiver and back to the first transceiver in the linear line, wherein the first transceiver and the second transceiver each include a receiver and a transmitter. A second distance between the first transceiver and the second transceiver is determined by comparing a phase difference between the first signal received by the second transmitter and a second signal received by the second transmitter, wherein the second signal was transmitted from the first transceiver into the cable and received by the second transceiver wirelessly from the cable, and wherein the first signal and the second signal are phase aligned.

A method and system for tracking a course of a cable using electromagnetic waves. A first distance between a first transceiver and a second transceiver is determined by determining a total transmission time for a first wireless signal traveling in a linear line from the first transceiver to the second transceiver and back to the first transceiver in the linear line, wherein the first transceiver and the second transceiver each include a receiver and a transmitter. A second distance between the first transceiver and the second transceiver is determined by comparing a phase difference between the first signal received by the second transmitter and a second signal received by the second transmitter, wherein the second signal was transmitted from the first transceiver into the cable and received by the second transceiver wirelessly from the cable, and wherein the first signal and the second signal are phase aligned.

Methods and systems are described for sequentially obtaining a plurality of data streams, the plurality of data streams comprising a data stream in a current condition, a data stream in a skewed-forward condition, and a data stream in a skewed-backward condition, calculating, for each data stream in the plurality of data streams, a corresponding set of cost-function values by obtaining a corresponding set of eye measurements, the eye measurements obtained by adjusting a sampling threshold of a sampler generating a plurality of samples of the data stream, the plurality of samples comprising edge samples and data samples, wherein the data stream is sampled at a rate equal to twice a rate of the data stream and calculating the corresponding set of cost-function values based on the corresponding set of eye measurements, and generating a skew control signal based on a comparison of the sets of calculated cost-function values.

Methods and systems are described for sequentially obtaining a plurality of data streams, the plurality of data streams comprising a data stream in a current condition, a data stream in a skewed-forward condition, and a data stream in a skewed-backward condition, calculating, for each data stream in the plurality of data streams, a corresponding set of cost-function values by obtaining a corresponding set of eye measurements, the eye measurements obtained by adjusting a sampling threshold of a sampler generating a plurality of samples of the data stream, the plurality of samples comprising edge samples and data samples, wherein the data stream is sampled at a rate equal to twice a rate of the data stream and calculating the corresponding set of cost-function values based on the corresponding set of eye measurements, and generating a skew control signal based on a comparison of the sets of calculated cost-function values.

Apparatuses (and methods of manufacturing same), systems, and methods concerning polyphase digital filters are described. In one aspect, an apparatus is provided, including at least one pair of subfilters, each having symmetric coefficients, and a lattice comprising two adders and feedlines corresponding to each of the at least one pair of subfilters, each having symmetric coefficients. In one aspect, the apparatus is a polyphase finite impulse response (FIR) digital filter, including an interpolator and a decimator, where each of the interpolator and the decimator have at least one pair of subfilters, each having symmetric coefficients, and a lattice comprising two adders and feedlines corresponding to each of the at least one pair of subfilters, each having symmetric coefficients.