A communication system transmits an input block of bits over a communication channel using a prefix tree that maps a dyadic distribution of compositions of output symbols to prefixes of variable lengths. A path to each leaf of the prefix tree is defined by a prefix formed by a unique sequence of binary values of a length equal to a depth of the leaf. Each leaf is associated with a composition that has at least a number of unique permutations equals to two in a power of a length of a suffix of the block of input bits. The system selects a composition identified in the prefix tree by a prefix in the input block of bits, permutes the selected composition according to a suffix in the input block of bits, and transmits the permuted composition over a communication channel.

Aspects of the subject disclosure may include, a first waveguide system for obtaining instructions that reconfigures operations thereof, receiving first electromagnetic waves propagating along a transmission medium without requiring an electrical return path, where the first electromagnetic waves convey first data. The first waveguide system can further facilitate processing the first electromagnetic waves, according to the instructions, to selectively generate repeated electromagnetic waves for delivery to a second waveguide system, regenerated electromagnetic waves for delivery to the second waveguide system, first signals for delivery to a routing device, or any combinations thereof. Other embodiments are disclosed.

Aspects of the subject disclosure may include, a system for receiving second signals from a switch responsive to the switch receiving first signals a first waveguide system, wherein the first waveguide system facilitates generating the first signals responsive to receiving first electromagnetic waves that propagate along a transmission medium. The system further facilitates selecting a communication device according to the second signals, and transmitting a first wireless signal directed to the communication device, wherein the first wireless signal conveys first data supplied by the second signals. Other embodiments are disclosed.

Systems and methods may receive data from a data interface of a base platform, convert the data into an analog signal and modulate the analog signal onto a direct current (DC) power line coupled to a connector of the base platform. Additionally, the modulated analog signal may be received from a DC power line coupled to a connector of a tablet platform, wherein the modulated analog signal is converted to a digital signal and demodulated to recover the data. In one example, the data includes user input data associated with an input device including one or more of a mouse, a keyboard, a keypad or a touchpad.

An FDM communication system in which encoding/decoding settings for different sets of tones are specified using index values assigned to different sets of tones by selecting suitable respective values from a fixed set of index values. Each of the specified index values causes the corresponding digital signal processor to use a respective predefined pair of encoding or decoding settings that includes a respective predefined constellation and a respective predefined shaping code. In some embodiments, the used shaping codes are configured to operate as block codes, with the block sizes being selected such that a multi-code frame generated using multiple shaping codes can be matched to exactly one DMT symbol or to a desired number of whole DMT symbols.

An integrated signal booster system provides cellular and wireless local area network (WLAN) access within a single device. The integrated signal booster system includes at least one antenna integrated configured to receive a cellular uplink signal from user equipment (UE) of a cellular network and to transmit a boosted cellular downlink signal to the UE, signal booster circuitry configured to receive a cellular downlink signal from a cable and to send a boosted cellular uplink signal over the cable, and WLAN access point (AP) circuitry configured to control wireless communications with one or more wireless clients of a WLAN network. The signal booster circuitry is configured to generate the boosted cellular downlink signal based at least in part on amplifying the cellular downlink signal, and to generate the boosted cellular uplink signal based at least in part on amplifying the cellular uplink signal.

An antenna system is provided. In one example implementation, the antenna system may include a modal antenna that is operable in a plurality of different modes, and each mode may be associated with a different radiation pattern. The antenna system may include a tuning circuit configured to operate the modal antenna in the plurality of different modes. A transmission line may couple a radio frequency circuit to the modal antenna. The radio frequency circuit may be configured to modulate a control signal onto an RF signal using amplitude-shift keying modulation to generate a transmit signal for communication over the transmission line to the tuning circuit. The tuning circuit may be configured to demodulate the control signal such that the radio frequency circuit can adjust a mode of the modal antenna via the control signal. In some embodiments, the amplitude-shift keying modulation may include on-off keying modulation.

Systems and methods are disclosed for an integrated circuit (IC) comprising an oscillator, an on-off-keying modulator configured to modulate input data coupled to the oscillator, a serial communications transmitter coupled to the on-off-keying modulator, a serial communications receiver coupled to the serial communications transmitter by a set of cables, and an envelope detector coupled to the serial communications receiver. In the IC, power and data are simultaneously delivered across the same set of cables from the serial communications transmitter to the serial communications receiver.

The present technology relates to a transmitter, a transmission method, a receiver, and a reception method that can keep upsizing and cost increase to a minimum. The transmitter and the receiver have a detection mode and a communication mode as operation modes. The detection mode detects contact between a first waveguide on the side of the transmitter and a second waveguide on the side of the receiver. The communication mode sends or receives a modulated signal, acquired through frequency conversion of a baseband signal, via the first and second waveguides. The transmitter sends a given signal to the first waveguide in the detection mode. The transmitter and the receiver go from the detection mode to the communication mode in response to a given signal received by the receiver via the second waveguide and send and receive the modulated signal via the first and second waveguides in the communication mode.

A signal transmission system for transmitting a main process variable and further data between a field device and a superordinate unit, includes a first conversion arrangement, a second conversion arrangement and an optocoupler arrangement. The optocoupler arrangement is connected between the first conversion arrangement and the second conversion arrangement. The first conversion arrangement is configured to convert at least the further data exchanged between the field device and the superordinate unit into a data signal transmittable via the optocoupler arrangement. The optocoupler arrangement transmits the data signal between the first conversion arrangement and the second conversion arrangement. The second conversion arrangement converts the data signal to the further data and transmits it to the field device. A method transmits a main process variable and further data between a field device and a superordinate unit. In the method, at least the further data is transmitted via an optocoupler arrangement.