A compressed over pulse-code modulation (PCM) (CoP) format (e.g., for data transfer between a Bluetooth component and an audio digital signal processor (ADSP) component) may be modified to transport additional metadata (e.g., sideband data). Sideband data may be transported to convey parameter control information (e.g., control information for codec parameter control interfaces, such as information for quality mode changes), in band data (e.g., data specific parameters, such as timestamps for playback timing control and synchronization purposes), etc. Sideband data may be transported (e.g., communicated) over an interface between a Bluetooth component and an ADSP component while an applications processor is operating in a low power state or sleep mode. According to some aspects, the modified CoP format (e.g., a sideband packet) may include a sideband identification (ID) field and a sideband data payload (e.g., where the sideband ID field indicates the structure of a corresponding sideband data payload).

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.

Provided is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals to be transmitted over the same frequency bandwidth at the same time, including the steps of selecting a matrix F[i] from among N matrices, which define precoding performed on the plurality of baseband signals, while switching between the N matrices, i being an integer from 0 to N1, and N being an integer at least two, generating a first precoded signal z1 and a second precoded signal z2, generating a first encoded block and a second encoded block using a predetermined error correction block encoding method, generating a baseband signal with M symbols from the first encoded block and a baseband signal with M symbols the second encoded block, and precoding a combination of the generated baseband signals to generate a precoded signal having M slots.

Accordingly, there are disclosed herein architectures and communication methods that enable mass-manufactured cables to perform robustly at per-lane PAM4 symbol rates up to 56 GBd and beyond. One illustrative cable embodiment includes conductor pairs connected between a first connector and a second connector. The first and second connectors are each adapted to fit into an Ethernet port of a corresponding host device to receive from that host device an electrical input signal conveying an inbound data stream to the cable, and to provide to that host device an electrical output signal conveying an outbound data stream from the cable. The first and second connectors each include a respective transceiver that performs clock and data recovery on the electrical input signal to extract and re-modulate the inbound data stream for transit via the conductor pairs as a respective electrical transit signal conveying a transit data stream.

A transmission device of the disclosure includes: a plurality of delay sections having changeable delay amounts; a driver section that includes a plurality of drivers and transmits a data signal indicating a sequence of symbols using the plurality of drivers, the plurality of drivers being provided to correspond to the plurality of delay sections and setting a voltage at a corresponding output terminal to a mutually different voltage on the basis of a signal delayed by a corresponding delay section of the plurality of delay sections; and a controller that sets the respective delay amounts of the plurality of delay sections on the basis of a transition of a symbol in the sequence of symbols.

A transmission device of the disclosure includes: a plurality of delay sections having changeable delay amounts; a driver section that includes a plurality of drivers and transmits a data signal indicating a sequence of symbols using the plurality of drivers, the plurality of drivers being provided to correspond to the plurality of delay sections and setting a voltage at a corresponding output terminal to a mutually different voltage on the basis of a signal delayed by a corresponding delay section of the plurality of delay sections; and a controller that sets the respective delay amounts of the plurality of delay sections on the basis of a transition of a symbol in the sequence of symbols.

A system and method for waveform modulation includes encoding input digital data at selected phase angles of an unmodulated sinusoidal waveform. The encoding includes selectively reducing a power of the unmodulated sinusoidal waveform at the selected phase angles in accordance with bit values of the input digital data so as to respectively define first, second, third and fourth data notches in the modulated sinusoidal waveform. An encoded analog waveform is then generated from a digital representation of the modulated sinusoidal waveform. The encoding is performed so that energies associated with the first and third data notches are balanced and energies associated with second and fourth data notches are also balanced. Each of the energies corresponds to a cumulative power difference between a power of the unmodulated sinusoidal waveform and a power of the modulated sinusoidal waveform over a phase angle range subtended by one of the data notches.

A baseband processing unit includes a baseband processor configured to receive a plurality of component carriers of a radio access technology wireless service, and a delta-sigma digitization interface configured to digitize at least one carrier signal of the plurality of component carriers into a digitized bit stream, for transport over a transport medium, by (i) oversampling the at least one carrier signal, (ii) quantizing the oversampled carrier signal into the digitized bit stream using two or fewer quantization bits.

A system and method for efficiently transporting data in a computing system are contemplated. In various embodiments, a computing system includes a source, a destination and multiple lanes between them for transporting data. Multiple receivers in the destination has a respective termination resistor connected to a single integrating capacitor, which provides a reference voltage to the multiple receivers. The receivers reconstruct the received data by comparing the corresponding input signals to the reference voltage. The source includes a table storing code words. The source maps a generated data word to a code word, which is sent to the destination. The destination maps the received code word to the data word. The values of the code words are selected to maintain a nearly same number of Boolean ones on the multiple lanes over time as a number of Boolean zeroes.

A system and method for calibrating a pulse width modulation (PWM) signal that extends the on time by a higher resolution increment. The system comprises a PWM generator that receives a VDDIO rail to generate first and second PWM signals, the second PWM signal having an on time extended by the higher resolution increment having a commanded length. The system further comprises a VDDIO circuit that receives the VDDIO rail and outputs a VDDIO signal. First and second analog-to-digital converters are configured to generate a first and second sets of PWM samples and first and second sets of VDDIO samples. A microcontroller is configured to calculate an actual increment length based on the samples, and to compensate for a difference between the commanded length and the actual increment length.