12 results about "Qpsk modulation" patented technology

The embodiment of the invention discloses a data transmission method, a data transmission device and a data transmission system, which can be compatible with the existing 400ZR +, 800ZR and 800ZR + DSP (Digital Signal Processor) framing scheme, are more beneficial to hardware implementation, and can also be suitable for scenes adopting multi-wave or multi-subcarrier transmission in the future, such as 800Gbps multi-subcarrier transmission adopting QPSK (Quadrature Phase Shift Keying) modulation, 1.2 Tbps multi-subcarrier transmission adopting 16QAM (Quadrature Amplitude Modulation) modulation and 1.6 Tbps multi-subcarrier transmission adopting 16QAM modulation. And even transmission scenes with higher speed such as 2.4 T / 3.2 T and the like can be realized. The method comprises the steps that W data frames are sent, in one polarization direction, the number of symbols included in any data frame is 87552, each data frame comprises 12 subframes, the number of symbols included in each subframe is 7296, and W is an even number.

Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to communicate using π / 2 binary phase shift keying (BPSK) modulation according to extended coding rates. In some cases, the UE may receive configuration information that supports modulation orders for π / 2 BPSK modulation extended to include modulation orders otherwise only configured for quadrature phase shift keying (QPSK) modulation. Further, the UE may support dynamic switching between π / 2 BPSK and QPSK modulation. For example, the UE may transmit or receive control signaling indicating a modulation order for an uplink transmission, where the UE or a network entity may determine which modulation scheme and order to use according to communication parameters associated with the uplink transmission, the UE, or both.

Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to communicate usingπ2binary phase shift keying (BPSK) modulation according to extended coding rates. In some cases, the UE may receive configuration information that supports modulation orders forπ2 ⁢BPSKmodulation extended to include modulation orders otherwise only configured for quadrature phase shift keying (QPSK) modulation. Further, the UE may support dynamic switching betweenπ2 ⁢BPSKand QPSK modulation. For example, the UE may transmit or receive control signaling indicating a modulation order for an uplink transmission, where the UE or a network entity may determine which modulation scheme and order to use according to communication parameters associated with the uplink transmission, the UE, or both.

The embodiments of the present application disclose a data transmission method, and an apparatus and a system thereof, which are compatible with the existing DSP framing schemes 400ZR+, 800ZR, and 800ZR+, are more conducive to hardware implementation, and can further be applied to future transmission scenarios using multi-wave or multi-subcarrier transmission, for example, 800 Gbps multi-subcarrier transmission using QPSK modulation, 1.2 Tbps multi-subcarrier transmission using 16-QAM modulation, 1.6 Tbps multi-subcarrier transmission using 16-QAM modulation, or even higher rate transmission scenarios such as 2.4 T / 3.2 T. The method comprises: sending W data frames, the number of symbols comprised in any one data frame in a polarization direction being 87552, each data frame comprising 12 subframes, and the number of symbols comprised in each subframe being 7296, where W is an even number.

The invention discloses a data encryption method based on a multi-stage dynamic iteration mechanism, and solves the problem that hidden dangers are brought to system security due to the fact that secret key information is repeatedly transmitted in pseudo noise information in the existing chaotic encryption technology. According to the method, encryption information in a 16 QAM modulation format and a key sequence in a QPSK modulation format are superposed into 64QAM signals for transmission by adopting different powers, encryption dimensions and a chaos model are embedded into small-power QPSK signals at the same time, and a multi-stage dynamic iteration mechanism is combined, so that more dynamic and flexible key information updating is realized, the safety performance of a system is improved, and the method is suitable for large-scale popularization and application. And potential safety hazards caused by a fixed encryption mode and encrypted information are avoided.

Disclosed in the embodiments of the present application are a data transmission method, apparatus and system, which can be compatible with existing DSP framing schemes of 400ZR+, 800ZR and 800ZR+, are more conducive to hardware implementation, and can also be applied to scenarios in which multi-wave or multi-subcarrier transmission is used in the future, such as 800 Gbps multi-subcarrier transmission using QPSK modulation, 1.2 Tbps multi-subcarrier transmission using 16QAM modulation, 1.6 Tbps multi-subcarrier transmission using 16QAM modulation, and even scenarios of transmission at higher rates such as 2.4 T / 3.2 T. The method comprises: sending W data frames, wherein in one polarization direction, the number of symbols comprised in any data frame is 43776, each data frame comprises six subframes, the number of symbols comprised in each subframe is 7296, and W is an even number.

The invention discloses a quantum enhancement detection method and device based on dual-class heterodyne partition displacement, and the method comprises the steps: designing a hybrid quantum receiver based on a binary phase shift keying signal under the condition that a transmitting end uses a QPSK modulation signal, and deducing the error probability of the hybrid quantum receiver. The method has good detection performance, and can be practically used in a quantum detection system under the condition of considering the influence of the detection efficiency and quantum efficiency of the photon number detector.

The invention discloses a data transmission performance optimization method based on reverse Cantor fractal coding, and solves the problem that key information is easy to expose after relatively high repetition due to a simple configuration structure in a traditional chaotic disturbance scheme based on key follow-up transmission. According to the invention, reverse Cantor fractal coding is carried out on initial key information to obtain a fractal structure key, on one hand, the fractal structure key is adopted to carry out bit encryption, subcarrier encryption and symbol encryption on service data, and on the other hand, small sending power is distributed to the fractal structure key and QPSK modulation is carried out. According to the method, a fractal structure secret key signal with small sending power is obtained, then superposition and probability shaping are carried out on the fractal structure secret key signal with small sending power and an encrypted QPSK signal with large sending power, a large amount of information redundancy is avoided, 0.7 dB to 0.9 dB of receiving sensitivity is improved, and the transmission performance of an optical communication system is improved.

Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to communicate using binary phase shift keying (BPSK) modulation according to extended coding rates. In some cases, the UE may receive configuration information that supports modulation orders for BPSK modulation extended to include modulation orders otherwise only configured for quadrature phase shift keying (QPSK) modulation. Further, the UE may support dynamic switching between BPSK and QPSK modulation. For example, the UE may transmit or receive control signaling indicating a modulation order for an uplink transmission, where the UE or a network entity may determine which modulation scheme and order to use according to communication parameters associated with the uplink transmission, the UE, or both.

The embodiment of the invention discloses a data transmission method, a data transmission device and a data transmission system, which can be compatible with the existing 400ZR +, 800ZR and 800ZR + DSP (Digital Signal Processor) framing scheme, are more beneficial to hardware implementation, and can also be suitable for scenes adopting multi-wave or multi-subcarrier transmission in the future, such as 800Gbps multi-subcarrier transmission adopting QPSK (Quadrature Phase Shift Keying) modulation, 1.2 Tbps multi-subcarrier transmission adopting 16QAM (Quadrature Amplitude Modulation) modulation and 1.6 Tbps multi-subcarrier transmission adopting 16QAM modulation. And even transmission scenes with higher speed such as 2.4 T / 3.2 T and the like can be realized. The method comprises the steps that W data frames are sent, in one polarization direction, the number of symbols included in any data frame is 43776, each data frame comprises 6 subframes, the number of symbols included in each subframe is 7296, and W is an even number.

The application discloses a radar communication integrated system and waveform design method based on QPSK modulation, and relates to the technical field of communication, and comprises the following steps: sequentially encoding and modulating a communication signal generated by a signal source to obtain a modulated communication signal; modulating a radar signal to obtain a modulated radar signal; and mixing the modulated communication signal and the modulated radar signal to form an integrated signal; wherein the integrated signal is used for communication transmission and radar detection. The application can improve the frequency spectrum utilization rate and the system comprehensive performance.

The application discloses a kind of electromagnetic wave instruction downlink method based on multiple encoding modulation, first ground sending end uses channel encoder to carry out octal LDPC code encoding to the instruction signal that has passed through signal source coding, obtains information sequence;Second modulator carries out QPSK modulation to information sequence, obtains modulated signal, and it is transmitted to downhole receiving end;Then downhole receiving end receives the modulated signal of transmission, and using demodulator carries out coherent demodulation, recovers information sequence;Finally decoder adopts FFT-BP decoding algorithm to the multiple encoding modulation of information sequence, then source decoding is carried out, obtains original electromagnetic wave instruction signal.The application carries out octal LDPC code encoding and quaternary QPSK modulation to electromagnetic wave instruction signal, utilizes the characteristics of octal LDPC code high-speed information transmission advantage and QPSK modulation good anti-interference performance, carries out multiple encoding modulation processing to electromagnetic wave signal, can improve communication rate to meet the requirement of timeliness to drilling communication.