In an embodiment a device includes a first circuit and a second circuit, wherein the first circuit is configured to generate a fourth signal and a fifth signal by applying the phase shift respectively to a first signal and to a second signal and deliver a sixth signal corresponding to a sampling over one bit of the fourth signal, a seventh signal corresponding to a sampling over one bit of the fifth signal, an eighth signal corresponding to a sampling over one bit of a difference between the fourth and fifth signals, and a ninth signal corresponding to a sampling over one bit of a sum between the fourth and fifth signals, wherein the second circuit is configured to receive the sixth, seventh, eighth, and ninth signals and determine, during a first phase where the first and second signals are representative of a first known symbol of a QPSK constellation, a state of a first bit from among a first state and a second state based on the eighth and ninth signals.

A device for transmitting data within a vehicle comprises a first connecting element and a cable transmission element. The first connecting element is connected to an antenna and translates a high-frequency data received by the antenna into a digital data. The cable transmission element is connected to the first connecting element and transmits the digital data.

A device for transmitting data within a vehicle comprises a first connecting element and a cable transmission element. The first connecting element is connected to an antenna and translates a high-frequency data received by the antenna into a digital data. The cable transmission element is connected to the first connecting element and transmits the digital data.

A testing device and a method for testing a device under test are provided. The testing device comprises at least two signal generators, at least two numerically controlled oscillators, at least two white gaussian noise generators, at least two digital filters, each of which comprising a respective transfer function H.sub.i, at least two adders, at least two digital-to-analog converters, and an analog processor.

A receiver apparatus comprises circuitry configured for storing a first sequence of values. At the receiver apparatus, a communications signal is received which conveys a second sequence of values, the second sequence of values being related to the first sequence of values. According to some examples, the second sequence of values is identical to the first sequence of values. At the receiver apparatus, P results are calculated from a cross-correlation of the first sequence of values with at least a portion of a representation of the communications signal, where P is a positive integer. According to some examples, P≥2. An estimate of a phase offset of a continuous clock is calculated as a function of the P results. According to some examples, the function is a non-linear function. The estimate of the clock phase offset may be used to achieve clock recovery at the receiver apparatus.

Techniques for blind distributed multi-user MIMO enable simultaneous decoding of multiple concurrent wireless transmissions without the need for coordination between wireless devices or a measurement phase. Wireless devices are permitted to transmit independently and at arbitrary times. Concurrent transmissions from wireless devices superimpose in the wireless channel and are received at various base stations. The base stations forward received data samples to a central entity (e.g., a cloud computing service), which uses known preambles to reliably estimate CFOs and channels between the transmitting devices and the receiving base stations while simultaneously recovering the data samples of the individual data streams.

A transmitter is disclosed. The transmitter includes a clock configured to generate one or more output clock signals. The transmitter further includes at least one frequency divider configured to generate a plurality of divided frequencies based on the one or more output clock signals, and a modulator. The transmitter also includes at least one antenna or transducer configured to transmit modulated data. The transmitter includes a memory configured to store instructions, and at least one processor configured to execute instructions performing operations including mapping data to a decimal code value of a plurality of decimal code values, converting the decimal code value to a shrinking base system, and selecting a set of frequencies among the plurality of divided frequencies based on the code value corresponding to the shrinking base system for the decimal code value. The modulator may be configured to modulate the decimal code value using the set of frequencies.

A transmitter is disclosed. The transmitter includes a clock configured to generate one or more output clock signals. The transmitter further includes at least one frequency divider configured to generate a plurality of divided frequencies based on the one or more output clock signals, and a modulator. The transmitter also includes at least one antenna or transducer configured to transmit modulated data. The transmitter includes a memory configured to store instructions, and at least one processor configured to execute instructions performing operations including mapping data to a decimal code value of a plurality of decimal code values, converting the decimal code value to a shrinking base system, and selecting a set of frequencies among the plurality of divided frequencies based on the code value corresponding to the shrinking base system for the decimal code value. The modulator may be configured to modulate the decimal code value using the set of frequencies.

The present invention relates to an adaptive synchronization device for demodulating a signal in linear modulation (x). The device functions from a sampled version of the signal (x). The device being characterized in that it comprises: at least one synchronization module (F) comprising: at least one first sub-module (F.sub.n) arranged to deliver a first output signal (y) from the input signal (x) received at a period (T) less than the value (I) with (B) the bandwidth of the input signal (x); this first sub-module (F.sub.n) is capable of compensating a transmission delay of the input signal (x) by estimation of the propagation delay () between a transmitter and a receiver of a transmission medium; this first sub-module adapts the rate at its output to one sample per symbol; at least one second sub-module (F.sub.u) arranged to deliver a corrective () to be applied to the current estimation of the delay (), from an error term (w) defining the decision error of the device and the influence of the processings downstream of the first sub-module (F); at least one correction module of transmission imperfections (H), disposed downstream of the synchronization module (F) and forming a correction chain of transmission imperfections of the first output signal (y) received by this module (H) at the rhythm T, and comprising: at least one first sub-module (H.sub.n) arranged to deliver a second output signal (z) at the rhythm (T) estimating a stream of emitted symbols (ai); at least one second sub-module (H.sub.p) configured to deliver the error term (w), by application of a correction to an error term (v) for estimation of symbols to consider the influence of the processings included in the first sub-module (H.sub.n). $\begin{array}{cc}\left(\frac{1}{B}\right)& \left(I\right)\end{array}$

A method improves the transmission quality between a data collector and a plurality of metering units. A first communication module is assigned to the data collector and a second communication module is assigned in each case to a metering unit. The second communication module transmits data via radio signals to the first communication module. The first communication module has a first frequency reference device and the second communication module has a second frequency reference device. The radio signals transmitted are dependent on the second frequency reference device. The measurement of a parameter of the radio signal is performed by the first communication module. An estimation of an error of the second frequency reference device on the basis of the parameter measured values is determined. An adjustment of the frequency of the first frequency reference device is performed such that the error is reduced.