A receiver receives a multicarrier signal from a wireless communication network and determines subcarrier values of the multicarrier signal. A decoder decodes the subcarrier values to produce a set of data symbols. The multicarrier signal is characterized by a set of modulated pulse waveforms, which results from a sum of the subcarriers. Each of the modulated pulse waveforms has a different time offset. The decoder employs a set of codes for decoding the baseband signal, wherein each code comprises a different linearly increasing phase. Each of the linearly increasing phases corresponds to one of the different time offsets.

A processing module for a transmitter device configured to provide for generation of a signal comprising at least one frame for transmission by the transmitter device to a receiver device, the processing module configured to provide for processing of an input pulse stream comprising a stream of pulses representative of data, to provide an output pulse stream, each pulse of the pulse streams having one of two states defining the phase with which a carrier wave is modulated; the processing module configured to; divide the input pulse stream into consecutive groups of pulses; and for each group of pulses, based on determination that the first two or more consecutive pulses of the group have the same polarity, provide for addition of at least one dummy pulse to the group directly after the first two or more consecutive pulses, with an opposite polarity.

Systems and methods are provided for jitter improvement in serializer-deserializer (SerDes) transmitters. One or more adjustments may be applied in SerDes transmitter circuitry to reduce jitter in a serial output of the SerDes transmitter circuitry, which may occur as a result of processing of input data. Applying the one or more adjustments may comprise use of dummy data. The dummy data may be configured to generate corresponding dummy current pulses which may in turn be used in controlling supply variations occurring during processing of the input data and/or generation of the serial output. The dummy data may be configured to generate the dummy current pulses such that they are applied along with current pulses corresponding to the input data. The dummy data may be adaptively set or adjusted based on the input data. The use of the dummy data may be selectively turned on or off.

Systems, devices and methods are disclosed using a transmitter architecture to keep the transmitter in a deep sleep mode before activation/enabling. The transmitter tag comprises a power-good-detector, a first regulator and a second regulator. The power-good-detector includes a power-good-latch, a ring oscillator and a ripple counter. Upon disconnecting a GPIO pin from the ground, the power-good-latch sends a Bias_EN signal to the regulator. Upon receipt of the Bias_EN signal, the first regulator transmits a wakeup signal to the ring oscillator, which then starts sending the clock signals to the ripple counter. When the counted clock signals reach a threshold value, the ripple counter sends the power-good-digital signal to the flip flops. When the tag is in the reset mode, the power-good-digital signal is also low. When the power-good-digital signal goes from low to high, the tag is out of the reset mode.

An ultra-wideband pulse generator for radio communication with phase modulation at frequencies of multiple gigahertz comprises an oscillator formed by a pair of intersecting differential branches that have two outputs connected to an LC resonant load. The transmission of a UWB pulse is caused by the application of a supply current to the differential pair over a few nanoseconds. Two current-injecting branches are respectively connected to the outputs S and S. The control of phase modulation consists in applying an injection current to a single branch to unbalance the differential pair at the start of the generation of the UWB pulse. Depending on the side from which the injection current is applied, the oscillation at the carrier frequency will initiate with one phase or an opposite phase.

Example signal transmission methods and apparatus are described. In one example method, a first initiating device sends a poll frame. The poll frame includes time-frequency location information of N first ultra-wideband (UWB) segment signals, and the poll frame further includes first delay information for each of M second responding devices to reply to the first initiating device with a response frame. The first initiating device receives a plurality of response frames based on a timestamp of the poll frame and the first delay information for each of the M second responding devices to reply to the first initiating device with the response frame.

Radiofrequency communication device comprising at least one TORP signal generation circuit, the TORP signal corresponding to oscillations trains periodically repeated at a frequency F.sub.PRP for which the oscillation frequency is F.sub.OL>F.sub.PRP and for which each oscillations train lasts for a duration of less than 1/F.sub.PRP, and at least one multiplier circuit for which an input is coupled to an output of said at least one TORP signal generation circuit such that it is capable of multiplying the TORP signal with a baseband signal comprising at least one of information intended to be transmitted by the radiofrequency communication device and a radiofrequency signal intended to be received by the radiofrequency communication device.

A photoelectric sensor uses a selective pulse detection technique and associated synchronization techniques to improve the quality of pulse detection, the operating range of the sensor, and the sensor's immunity to noise. These improvements also yield faster sensor response times and reduce the design cycle time. A modulated light beam emitted by the sensor's emitter comprises multiple pulse periods, with a pulse being transmitted within each period. The pulses are positioned within their respective periods at a defined offset time relative to the start of the periods, where the offset time can vary between periods according to a defined pattern. The receiver can selectively sample the signal based on synchronization information to determine whether the received signal contains the emitted pulse pattern. Through-beam sensor embodiments can generate the synchronization information internally based on an analysis of the analog signal corresponding to the modulated signal.

An ultra-wideband (UWB) communication system comprising a transmitter and a receiver is disclosed. In one embodiment, a symbol mapper circuit in the transmitter is adapted, in a first mode, to develop symbols having the number of pulses as currently defined in the 4z Standard; and, in a second mode, to develop symbols having fewer pulses than as currently defined in the 4z Standard. In an optional third mode, each data bit is mapped to a single pulse.

The present electronic generator of modulated subcarrier pulse signals includes a module (15) for modulating a pulse train, the position and amplitude of which are controllable, forming a switching signal (S.sub.3); a switching module (16), connected to the output of the module (15) for modulating a pulse train, including at least one transistor (22), controlled by said switching signal (S.sub.3), a voltage-controlled frequency-locking oscillator (18) having a frequency-locking band around a free oscillation frequency controlled by a control voltage, connected to the output of the switching module (16), the switching module making possible the injection of a periodic pulse signal (S.sub.4) having a frequency spectrum including at least one frequency line within said frequency locking band. Such arrangement makes it possible to obtain, at the output of the oscillator, frequency-controlled, phase-controlled and amplitude-controlled modulated subcarrier pulsed signals (S.sub.5).