Devices and methods for calibrating communication lines are disclosed. A clock sets a frequency of transmission through a communication line. A delay compensator, comprising multi-tap delay lines introduces delays in a transmitted message to compensate for skew in the communication line. An error comparator, coupled to the delay compensator, identifies errors in the messages transmitted through the multi-tap delay lines above an error margin. A delay selector, coupled to the error comparator and to the delay compensator, selects taps of the multi-tap delay lines of the delay compensator. Taps of the multi-tap delay lines where no errors are identified for the selected clock frequency are stored in a memory.

Method and apparatus are disclosed for robust visual light communication for vehicle-to-vehicle communication. An example vehicle includes a visual light communication (VLC) transmitter, a VLC communication receiver, and a VLC module. The VLC module sends a first handshake message including characteristics of the VLC transmitter and the VLC receiver using a first level of error correction. The VLC module also adjusts transmission parameters based on a received second handshake message. Additionally, the VLC module transmits data using a second level of error correction.

A data processing method includes: inserting multiple alignment markers (AMs) into a first data stream, where the first data stream is a data stream that is transcoded and scrambled after being encoded at a physical layer; adaptively allocating the first data stream that includes the multiple AMs to multiple physical coding sublayer (PCS) lanes to obtain second data streams; performing forward error correction (FEC) encoding on the second data streams on the multiple PCS lanes to obtain third data streams; and delivering the third data streams to multiple physical medium attachment (PMA) sublayer lanes according to an input bit width of a serializer/deserializer (SerDes) to obtain multiple fourth data streams, each fourth data stream includes at least one complete and continuous AM, and the at least one AM is an AM in the multiple AMs.

Advanced detectors for vector signaling codes are disclosed which utilize multi-input comparators, generalized on-level slicing, reference generation based on maximum swing, and reference generation based on recent values. Vector signaling codes communicate information as groups of symbols which, when transmitted over multiple communications channels, may be received as mixed sets of symbols from different transmission groups due to propagation time variations between channels. Systems and methods are disclosed which compensate receivers and transmitters for these effects and/or utilize codes having increased immunity to such variations, and circuits are described that efficiently implement their component functions.

A method and apparatus are provided for performing consistency testing for a Bose-Chaudhuri-Hocquenghem (BCH) error corrected first sub-frame of navigation message broadcast from a satellite of a GNSS. Consistency testing is performed by comparing BCH encoded portion(s)s of data symbols with elements of look up table(s) to see if such portions are similar to element(s) of the look up table(s).

Method and apparatus are disclosed for robust visual light communication for vehicle-to-vehicle communication. An example vehicle includes a visual light communication (VLC) transmitter, a VLC communication receiver, and a VLC module. The VLC module sends a first handshake message including characteristics of the VLC transmitter and the VLC receiver using a first level of error correction. The VLC module also adjusts transmission parameters based on a received second handshake message. Additionally, the VLC module transmits data using a second level of error correction.

A primary device implementing the subject system of link establishment for single pair Ethernet may include at least one processor. The at least one processor may be configured to transmit a first synchronization sequence to a secondary device, detect a second synchronization sequence transmitted by the secondary device, the second synchronization sequence differing from the first synchronization sequence, and after detection of the second synchronization sequence, initiate a training stage, the train stage comprising exchanging training frames with the secondary device. The at least one processor may be further configured to enter a data mode for data transmissions after completion of the training stage, the data transmissions being distinct from the training frames. In the data mode, data may be forward error correction encoded and then scrambled.

The present disclosure relates to a circuit for calibrating a baud rate. The circuit includes: a first counter connected to a receiving module of a serial port chip and configured to record a first low level duration of a data frame received by the receiving module; a second counter configured to: receive a bit sampling pulse generated from sampling the data frame according to a current baud rate of the receiving module, and record a quantity of the bit sampling pulse in the first low level duration; a divider, connected to the first counter and the second counter and calculate a calibration baud rate according to the first low level duration and the quantity of the bit sampling pulse in the first low level duration; and a selector, connected to the receiving module and the divider and configured to output the calibration baud rate to the receiving module.

Systems and methods including a transmitter resource to transmit a message having one or more packets, each packet having a boundary identifier including a first placeholder generated based on or in response to data in a fixed-sized window of the message, and a second placeholder generated based on or in response to all data in a respective packet, and a receiver resource to receive the message and to detect the boundary identifiers of the respective packets.

In one embodiment, a method receives a first time from a network device. The first time is derived from a first timing source in a first domain. The method receives a second time in a second domain from a second timing source. A difference time value is calculated between the first time and the second time. The method then sends the difference time value to the network device where the network device uses the difference time value to send a delay value to other computing devices to synchronize timing of the other computing devices in the second domain. The other computing devices are configured to synchronize the respective time using the delay value with mobile network devices to allow timing synchronization between the mobile network devices.