12 results about "Single carrier modulation" patented technology

The invention provides a signal modulation method and a related device, and the method comprises the steps: obtaining a first symbol sequence, carrying out the single-carrier modulation of the first symbol sequence, enabling the phase difference between two adjacent symbols in the first symbol sequence to be 90 degrees, enabling the single-carrier modulation to comprise the frequency spectrum adjustment based on a first scaling factor and the frequency domain spectrum shaping FDSS, the spectrum adjustment comprises spectrum compression; and determining a signal generated after the first symbol sequence is subjected to single-carrier modulation. According to the method, the first symbol sequence with the phase difference of 90 degrees between two adjacent symbols is subjected to single-carrier modulation, a single-carrier modulation scheme for performing frequency spectrum compression in a frequency domain is provided, the frequency spectrum efficiency is improved, and a single-carrier signal with low PAPR is generated.

The invention provides a communication method and device. The method comprises the following steps: determining a first frequency domain resource position of a primary synchronization signal PSS, a second frequency domain resource position of a secondary synchronization signal SSS, and a third frequency domain resource position of a physical broadcast channel PBCH signal; performing single-carrier modulation on a symbol borne by the PBCH based on the third frequency domain resource position to obtain a PBCH signal, wherein the single-carrier modulation comprises performing the same frequency domain spectrum shaping (FDSS) processing on a common part of the first frequency domain resource position of the PSS, the second frequency domain resource position of the SSS and the third frequency domain resource position of the PBCH signal; according to the method and the device, the synchronization signal block SSB with a relatively low peak to average power ratio (PAPR) can be obtained, and the SSB comprises the PBCH signal modulated by adopting a single carrier, so that the transmitting power of the SSB is improved, and the coverage range of a cell is improved.

The application discloses a kind of adaptive QAM and OFDM bimodulus intracorporeal ultrasonic communication system and method based on channel estimation, belong to intracorporeal ultrasonic communication technical field, the transmitting end is configured with single carrier QAM modulation mode and multicarrier OFDM modulation mode, real-time evaluation intracorporeal ultrasonic channel quality in receiving end, according to the optimal modulation mode of evaluation result, according to the optimal modulation mode generation mode switching instruction, the mode switching instruction is sent to transmitting end, transmitting end according to the mode switching instruction seamlessly switches between single carrier QAM modulation mode and multicarrier OFDM modulation mode, so that transmitting end works in optimal modulation mode, the system and method can dynamically select optimal modulation mode according to intracorporeal channel real-time quality parameter, while ensuring that mode switching is reliably synchronized.

Receiver devices for single-carrier modulation are disclosed. In particular, the receiver devices of the present disclosure are able to deal with doubly selective channels (i.e., channels varying in time and frequency). The receiver devices are configured to determine channel state information (CSI) of a communication channel and a plurality of signature roots based on the CSI. Each signature root of the plurality of signature roots is a nonzero complex point, wherein the plurality of signature roots are uniformly distributed on a circumference of a circle in a complex plane. The receiver devices are further configured to construct a first Vandermonde matrix based on the plurality of signature roots, perform a demodulation of a single-carrier modulated signal, based on the first Vandermonde matrix, to obtain a demodulated signal, and obtain symbols based on performing an iterative procedure on the demodulated signal.

Disclosed in the present application are communication methods and a related device. A communication method is executed by a first communication apparatus, and the method comprises: acquiring first information or receiving the first information from a second communication apparatus, wherein the first information is used for indicating a first ratio between energy per resource element (EPRE) of a pilot signal on which a first symbol is located and EPRE of data on which the first symbol is located, or the first information is used for indicating the first ratio and a second ratio between the EPRE of the data on which the first symbol is located and EPRE of data on which a second symbol is located, and the data is subjected to single-carrier modulation; and on the basis of the first information, sending the pilot signal and the data to the second communication apparatus, so that the flexible adjustment of the PAPR of signals can be realized.

Provided in the present application are a communication method and an apparatus. The method comprises: determining a first frequency domain resource location of a primary synchronization signal (PSS), a second frequency domain resource location of a secondary synchronization signal (SSS), and a third frequency domain resource location of a physical broadcast channel (PBCH) signal; on the basis of the third frequency domain resource location, performing single carrier modulation on a symbol borne by the PBCH to obtain the PBCH signal, the single carrier modulation comprising performing same frequency domain spectrum shaping (FDSS) processing on common portions of the first frequency domain resource location of the PSS, the second frequency domain resource location of the SSS and the third frequency domain resource location of the PBCH signal; and outputting the PBCH signal. Using the present application can obtain a synchronization signal block (SSB) having a lower peak-to-average power ratio (PAPR), and the SSB comprises a PBCH signal based on single carrier modulation, thereby improving the SSB transmission power and improving the cell coverage range.

The present application relates to the field of communications, and discloses a communication method and apparatus. The method comprises: acquiring a synchronization signal block; sending the synchronization signal block, the synchronization signal block comprising at least one type of first signal, the first signal being modulated by means of a single-carrier modulation technique, and each time domain symbol among time domain symbols that carry the first signal carrying a first signal of one type. The present application can increase or enhance the coverage range of a synchronization signal block, and reduce the difference between the coverage ranges of the synchronization signal block and a data signal.

The invention discloses a communication method and device, and relates to the field of communication. The method comprises the following steps: acquiring a synchronization signal block; transmitting the synchronization signal block; the synchronization signal block comprises at least one type of first signal, the first signal is modulated by a single carrier modulation technology, and in time domain symbols bearing the first signal, each time domain symbol bears one type of first signal. According to the invention, the coverage of the synchronization signal block can be improved or enhanced, and the difference between the coverage of the synchronization signal block and the coverage of the data signal is reduced.

Methods, systems, and devices for wireless communications are described. A transmitting device may operate in a non-linear region of a power amplifier by reporting an indication of power amplifier characteristics and backoff values to a receiving device. The indication of the power amplifier characteristics and the backoff values may be based on power amplifier operation in the non-linear region of power amplifier characteristic curves. The transmitting device may transmit, to the receiving device, signaling using a single carrier waveform at a transmission power in the non-linear region of the power amplifier characteristic curves based on the indication. The receiving device may receive the signaling and use the power amplifier characteristics and the backoff values to perform debiasing and nonlinearity corrections to recover the original signaling.

The present application relates to the technical field of communications, and provides a communication method and an apparatus. A network device obtains a synchronization signal block (SSB), the SSB comprising a PBCH signal and a synchronization signal, the PBCH signal being obtained by performing single-carrier modulation on a physical broadcast channel (PBCH), and the synchronization signal being obtained by performing single-carrier modulation on a synchronization sequence; the network device sends the SSB; and a terminal receives the SSB, and the terminal demodulates the synchronization signal and the PBCH signal. Since single-carrier modulation can ensure that signals have lower peak-to-average power ratio (PAPR), both the PBCH signal and the synchronization signal in the SSB in the present application use single-carrier modulation, thereby ensuring lower PAPR for the SSB.

Provided in the present application are a signal modulation method and a related apparatus. The method comprises: acquiring a first symbol sequence, and performing single-carrier modulation on the first symbol sequence, wherein the phase difference between two adjacent symbols in the first symbol sequence is 90°, the single-carrier modulation comprises first scaling factor-based spectrum adjustment and frequency-domain spectrum shaping (FDSS), and the spectrum adjustment comprises spectrum compression; and determining a signal generated after the first symbol sequence is subjected to the single-carrier modulation. The method performs single-carrier modulation on first symbol sequences having a phase difference of 90° between two adjacent symbols, and provides a single-carrier modulation solution for frequency spectrum compression in frequency domains, thus improving the spectrum efficiency and generating single-carrier signals with low PAPR.