A synchronizer can include a symbol estimator, an inner-pattern de-mapper, a timing tracker, and a correlator. The symbol estimator can be configured to estimate one or more symbols of a received signal based on a phase signal. The inner-pattern de-mapper can be configured to de-map the one or more symbols to generate an inner-pattern de-mapped symbol estimation. The timing tracker can be configured to accumulate the inner-pattern de-mapped symbol estimation and to determine a peak position based on the accumulated inner-pattern de-mapped symbol estimation. The correlator can be configured to correlate the accumulated inner-pattern de-mapped symbol estimation based on a reference signal. The correlation of the accumulated inner-pattern de-mapped symbol estimation can be independent of a signal over sampling rate (OSR). The synchronizer can be adapted in a long range Bluetooth low energy (BLE) receiver.

A single channel receiver includes an input terminal that receives an analog input signal, a mixer that down-mixes the analog input signal by use of a phase- and/or frequency-corrected oscillator frequency signal and shifts complex-valued information contained in the analog input signal to the real part (or alternatively to the imaginary part) to obtain an intermediate real-valued analog signal, an analog-to-digital-converter that converts the intermediate analog signal into an intermediate digital signal, a demodulator that demodulates the intermediate digital signal into a digital output signal, a phase tracking loop that detects zero-crossings in the intermediate digital signal to obtain phase error information representing a phase error in the intermediate digital signal, and an oscillator that generates the phase- and/or frequency-corrected oscillator frequency signal by compensating the phase and/or frequency error in the intermediate digital signal by correcting the phase of the oscillator frequency signal with the phase error information.

Apparatuses and methods related to digital mobile radio (DMR) with enhanced transceiver are disclosed herein. The transceiver detects waveforms of signals received by a digital mobile station radio (MS). By detecting whether the waveforms of the signals, the transceiver allows a digital baseband processor of the MS to remain in a sleep state while the signals are being detected by the DMR, thereby reducing an amount of power used while the signals are being detected.

A method for transmitting a demodulation reference signal and a network device are provided. The method includes: determining whether to configure a corresponding demodulation reference signal (DMRS) for a shared channel, according to a mapping type of the shared channel, the number of symbols transmitted on the shared channel, and the number of DMRS symbols; configuring a target number of DMRSs for the shared channel, when determining to configure the corresponding DMRS for the shared channel; and mapping the target number of DMRSs onto a target transmission resource for transmission.

A method for transmitting a demodulation reference signal and a network device are provided. The method includes: determining whether to configure a corresponding demodulation reference signal (DMRS) for a shared channel, according to a mapping type of the shared channel, the number of symbols transmitted on the shared channel, and the number of DMRS symbols; configuring a target number of DMRSs for the shared channel, when determining to configure the corresponding DMRS for the shared channel; and mapping the target number of DMRSs onto a target transmission resource for transmission.

Methods, systems and device for achieving synchronization in an orthogonal time frequency space (OTFS) signal receiver are described. An exemplary signal reception technique includes receiving an OTFS modulated wireless signal comprising pilot signal transmissions interspersed with data transmissions, calculating autocorrelation of the wireless signal using the wireless signal and a delayed version of the wireless signal that is delayed by a pre-determined delay, thereby generating an autocorrelation output, processing the autocorrelation filter through a moving average filter to produce a fine timing signal. Another exemplary signal reception technique includes receiving an OTFS modulated wireless signal comprising pilot signal transmissions interspersed with data transmissions, performing an initial automatic gain correction of the received OTFS wireless signal by peak detection and using clipping information, performing coarse automatic gain correction on results of a received and initial automatic gain control (AGC)-corrected signal.

A method, system and computer readable medium for transmitting data and feedback over a noisy feedforward channel and a noisy feedback channel.

A wireless communication apparatus performs communication for which a receiving timing and a transmitting timing are defined by using time slots. The wireless communication apparatus includes a control circuitry configured to control the wireless communication apparatus. The control circuitry includes a decoding circuitry configured to start a decoding process, on data received in a first time slot, immediately after a start of a second time slot subsequent to the first time slot. When a result of the decoding process is information requesting the wireless communication apparatus to perform transmission, the control circuitry is configured to perform a transmission preparation process from an end of the decoding process to a start of a third time slot subsequent to the second time slot, within a period of the second time slot for enabling the wireless communication apparatus to perform transmission.

A wireless communication apparatus performs communication for which a receiving timing and a transmitting timing are defined by using time slots. The wireless communication apparatus includes a control circuitry configured to control the wireless communication apparatus. The control circuitry includes a decoding circuitry configured to start a decoding process, on data received in a first time slot, immediately after a start of a second time slot subsequent to the first time slot. When a result of the decoding process is information requesting the wireless communication apparatus to perform transmission, the control circuitry is configured to perform a transmission preparation process from an end of the decoding process to a start of a third time slot subsequent to the second time slot, within a period of the second time slot for enabling the wireless communication apparatus to perform transmission.

A frequency shift keying (FSK) demodulator for demodulating symbols includes correlation circuits configured to output correlation metrics based on a buffered portion of an input signal as the input signal is continuously received by the FSK demodulator. The FSK demodulator also includes a result combining stage configured to output a set of first correlation results based on correlation metrics generated for a first portion of the input signal encoding a current symbol and at least one past symbol, and a set of second correlation results based on correlation metrics generated for a second portion of the input signal encoding the current symbol and at least one next symbol; and a time combining stage configured to combine a set of delayed first correlation results with the set of second correlation results to produce a demodulation decision that returns a most likely symbol value for the current symbol.