Abstract: A self-calibrated buffered-voltage DAC includes a DAC configured to receive an input digital signal and output a first analog voltage signal, a buffer amplifier configured to receive the first voltage signal from the DAC and provide a buffered second analog voltage signal, a voltage to frequency converter configured to selectively receive the first and second voltage signals and provide first and second output signals at respective first and second frequencies, a counter configured to receive the output signals from the voltage to frequency converter and provide respective first and second digital output signals corresponding to the respective first and second frequencies, a comparator configured to receive the first and second digital output signals and provide a digital calibration offset, and a DAC error code module configured to receive a digital input code and the digital calibration offset and to provide an offset corrected input digital signal to the DAC.

Abstract: The disclosure relates to a 5G or 6G communication system for supporting higher data rates. The disclosure provides a method performed by a base station of an NTN. The method includes: transmitting, to a terminal, a first PDSCH in first slots, wherein the first slots include at least one slot where the first PDSCH is scheduled without HARQ feedback; receiving, from the terminal, channel quality information and feedback information, wherein the feedback information includes HARQ feedback information and RLC status information associated with a transmission of the first PDSCH in the at least one slot; predicting a MCS and a repetition number for a second PDSCH, based on the information associated with the channel quality information and the feedback information; transmitting, to the terminal, information on the MCS and information on the repetition number; and transmitting, to the terminal, the second PDSCH in second slots.

Abstract: The disclosure relates to a self-calibrated buffered-voltage DAC, comprising: a DAC (101) configured to receive an input digital signal (Din) and output a first analog voltage signal (V1); a buffer amplifier (102) configured to receive the first voltage signal (V1) from the DAC (101) and provide a buffered second analog voltage signal (V2); a voltage to frequency converter (201) configured to selectively receive the first and second voltage signals (V1, V2) and provide first and second output signals at respective first and second frequencies (fLx); a counter (202) configured to receive the output signals from the voltage to frequency converter (201) and provide respective first and second digital output signals (D1, D2) corresponding to the respective first and second frequencies (fLx); a comparator (203) configured to receive the first and second digital output signals (D1, D2) and provide a digital calibration offset (?Din); and a DAC error code module (311) configured to receive a digital input code (Din)

Abstract: A waveform matching based optical digital signal receiving device sequentially comprises an optical arbitrary waveform generator unit, an electro-optic modulator unit, an opto-electric converter unit, an electric filter unit, a sampling and judging module, a digital signal processing unit and a bit-timing extracting module. Accordingly, signal matched filtering, sampling and judgment can be effectively carried out in the optical domain, and the influence of noises on signal reception can be eliminated to the maximum extent, thereby achieving accurate detection and reception of signals. Meanwhile, compared with a conventional electric receiving device, the digital signal receiving device provided by the present invention breaks the limitation of “electronic bottleneck,” and greatly improves the bandwidth of signal reception, which allows digital signal reception at a higher speed.

Abstract: A waveform matching based optical digital signal receiving device sequentially comprises an optical arbitrary waveform generator unit, an electro-optic modulator unit, an opto-electric converter unit, an electric filter unit, a sampling and judging module, a digital signal processing unit and a bit-timing extracting module. Accordingly, signal matched filtering, sampling and judgment can be effectively carried out in the optical domain, and the influence of noises on signal reception can be eliminated to the maximum extent, thereby achieving accurate detection and reception of signals. Meanwhile, compared with a conventional electric receiving device, the digital signal receiving device provided by the present invention breaks the limitation of “electronic bottleneck,” and greatly improves the bandwidth of signal reception, which allows digital signal reception at a higher speed.