A device includes a first interface to receive a signal from a first communication link, wherein the receive signal includes out-of-band (OOB) information. A detector coupled to the first interface detects the OOB information. An encoder coupled to the detector encodes the OOB information into one or more symbols (e.g., control characters). A second interface is coupled to the encoder and a second communication link (e.g., a serial transport path). The second interface transmits the symbols on the second communication link. The device also includes mechanisms for preventing false presence detection of terminating devices.

In a method for establishing a communication link between a first network interface device and a second network interface device comprises, the second network interface device receives a training signal transmitted by the first network interface device. The training signal is for timing synchronization between the second network interface device and the first network interface device. The second network interface device determines, based on at least one physical characteristic of the training signal, a physical layer (PHY) parameter of the first network interface device. A controller of the second network interface device configures one or more components of the second network interface device to operate in a mode that corresponds to the determined PHY operating parameter of the first network interface device.

The disclosed apparatus, structures, and methods are directed to a wireless receiver. The configurations presented herein employ a structure operative to receive a plurality of analog signals, a signal encoder configured to encode the plurality of received analog signals into a single encoded analog composite signal based on a coding scheme operating under a first code rate, a signal reconstruction module configured to segregate and reconstruct the single encoded digital composite signal into a re-encoded digital composite signal in accordance with the coding scheme operating under a second code rate. In addition, a signal decoder configured to decode the digital composite signals based on the coding scheme operating under the second code rate, and to output digital signals, in which each digital signal in the plurality of digital signals corresponds to a respective analog signal of the plurality of received analog signals.

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.

A method and apparatus for synchronizing a wireless communication receiver such as a Bluetooth receiver, including estimating the condition of the communication channel and operating the receiver either in frequency domain mode or in time domain mode based on the channel condition estimation. A soft threshold is used to estimate the symbols of the access address code. Oversampled data rate received data is processed at symbol rate of the data. Receiver functions are terminated upon determining that no signal that the receiver can decode is being received. Synchronization includes a correlator that processes an entire address code or a correlator that processes the address code in segments.

Disclosed is a method for variably changing a communication speed by a first device when a high-speed communication request within a range supported by the first device is input from a second device during low-speed communication of the first device with a third device in the UART communication and performing data communication with the second device at the varied high speed. A method for switching, by a device, a communication speed in an universal asynchronous receiver-transmitter (UART)-based data communication includes: measuring, by an interrupt detection module of the device, a pulse width of a start bit using an interrupt signal; calculating, by a communication speed calculation module of the device, a communication speed using a time duration for which the measured pulse width is maintained; and switching, by a communication speed switching module of the device, a current communication speed of the device to the calculated communication speed.

A device includes a first interface to receive a signal from a first communication link, wherein the receive signal includes out-of-band (OOB) information. A detector coupled to the first interface detects the OOB information. An encoder coupled to the detector encodes the OOB information into one or more symbols (e.g., control characters). A second interface is coupled to the encoder and a second communication link (e.g., a serial transport path). The second interface transmits the symbols on the second communication link. The device also includes mechanisms for preventing false presence detection of terminating devices.

A bandwidth detection device comprises a receiving circuit, for receiving a first plurality of frequency-domain signals on a first subchannel; a filter circuit, coupled to the receiving circuit, for transferring the first plurality of frequency-domain signals to a first plurality of filtered frequency-domain signals according to a filter function; and a processing circuit, coupled to the filter circuit, for comparing the first plurality of frequency-domain signals with the first plurality of filtered frequency-domain signals, to determine whether the first subchannel comprises first transmitted data.

A Controller Area Network, CAN, device, (400) is described that includes: a CAN transmitter (430) connected to two CAN bus terminals (401, 402) of the CAN device (400); a receiver circuit (450) operably coupled to the two CAN bus terminals (401, 402) of the CAN device (400); and a controller (432) connected to the CAN transmitter (430). The controller (432) is configured to: determine whether the CAN device (400) is operating as a transmitter node or a receiver node; detect a transition of the CAN device (400) from a dominant state to a recessive state; and in response to detecting both a transition of the CAN device (400) from the dominant state to the recessive state, and the determination of whether the CAN device (400) is operating as a transmitter node or a receiver node, control an output impedance of the CAN transmitter (430) to be within an impedance value range whilst a differential driver voltage on a CAN bus (104, 304, 404) connected to the CAN device (400) decreases to a predefined voltage.

Techniques that provide link auto-negotiation between a radio equipment controller (REC) and a radio equipment (RE) are described herein. In one embodiment, a method includes performing, by a proxy master, a Common Public Radio Interface (CPRI) Layer 1 (L1) link auto-negotiation with a RE to achieve a L1 synchronization between the proxy master and the RE at a link bit rate; communicating the link bit rate from the proxy master to a proxy slave; performing, by the proxy slave, a CPRI L1 link auto-negotiation with a REC to determine whether a L1 synchronization between the proxy slave and the REC is achieved, wherein if the L1 synchronization is achieved, the link bit rate is a common matching link bit rate achieved; and upon the common matching link bit rate being achieved, establishing a CPRI link between the REC and the RE using the common matching link bit rate.