40results about How to "Realize high-speed communication" patented technology

The invention discloses a circuit and a method for generating USB (universal serial bus) peripheral clock. The circuit comprises an internal oscillator, a controllable frequency divider, a frequency multiplier, a receiving timer and a frequency division controller, wherein the internal oscillator generates clock with fixed frequency, the controllable frequency divider carries out frequency division on the clock generated by the internal oscillator, the frequency multiplier carries out frequency multiplying on the clocked subjected to frequency division, in addition, the clock subjected to the frequency multiplying is transmitted to a USB main body structure, the receiving timer receives SOF (start-of-frame) data packets sent by a host machine according to the clock output by the frequency multiplier, in addition, the time intervals for receiving the SOF data packets are counted, the frequency division controller compares differences of the counting results of the receiving timer and the standard time intervals, and the frequency division perimeters of the controllable frequency divider are controlled and regulated according to comparison results. Through the technical scheme disclosed by the invention, under the condition without occupying lead pins of the USB main body structure, high-precision and accurate main clock is provided for the USB main body structure, and the high-speed communication of the USB main body structure is ensured.

There is provided a secret data transmission method where a first device generates plural pieces of distributed data including data of a master key and transmits these by wireless communication to a second device and where the second device receives the plural pieces of distributed data and reconstructs the master key, wherein the first device arranges data obtained by performing an EXOR operation in sequence on plural pieces of random number data and the master key to generate secret data, generates a last piece of distributed data by performing an EXOR operation in sequence on the plural pieces of distributed data and the secret data, and transmits the plural pieces of distributed data to the second device, and the second device performs an EXOR operation in sequence on the plural pieces of distributed data to reconstruct the secret data, divides the reconstructed secret data, and performs an EXOR operation on the divided pieces of data to reconstruct the master key.

The invention discloses a communication negotiation method of a mobile terminal and a smart card and a mobile terminal, wherein the method comprises: the mobile terminal selects a supply voltage of the smart card, allocates parameters for the communication of the mobile terminal and the smart card by activating the smart card and communicates with the smart card. The invention avoids the low communication speed problem between the mobile terminal and the smart card in relative technologies, effectively improves the mobile terminal performance, the processing speed and the user experience by defining a voltage selection and interface activation.

The invention discloses a Chirp signal generator, a Chirp communication system and a method for generating a Chirp signal. The Chirp signal generator includes a voltage-controlled oscillator, a phase detector, a loop filter and an adder. The voltage-controlled oscillator is used to output the Chirp signal, and the oscillation frequency of the voltage-controlled oscillator can be adjusted to control the phase or frequency of the output signal. The phase detector receives the first input signal and compares the phases of the first input signal with the voltage-controlled oscillator output signal to generate the first signal. The loop filter filters out the high-frequency signal and the noise signal on the first signal to generate the second signal. The adder receives the second input signal and superimposes the second signal and the second input signal to generate a third signal, and the third signal controls the voltage-controlled oscillator to adjust the oscillation frequency. The second input signal is a triangular wave signal, including a plurality of triangular wave symbols with the same frequency waveform, and the starting and ending frequencies of the symbols are the same. The transition time for generating the Chirp signal in the present invention is shorter, and can be applied to high-speed communication.

The invention discloses a data exchange system of a high-speed storage interface IP (Internet Protocol) core based on an MPMC (Multi-Port Memory Controller), which relates to a data exchange system and is used for solving the problems of low IP core resource utilization ratio and data throughput during realization of an off-chip storage by using the data exchange system. A user logic module control bus is communicated with an interface IP core through a customized UBus bus; the interface IP core is communicated with the MPMC IP core through an NPI (Numbering Plan Identifier) bus; the MPMC IP core is communicated with the off-chip storage; the interface IP core comprises a reading control module, a selection module and a writing control module; a first control bus of the reading control module and a first control bus of the writing control module are connected with the customized UBus bus respectively; a second control bus of the reading control module is connected with a first control bus of the selection module; a second control bus of the writing control module is connected with a second control bus of the selection module; and a third control bus of the reading control module and a third control bus of the writing control module are connected with the NPI bus respectively. The data exchange system is used for exchanging data with the off-chip storage.

The invention discloses a tunable multi-band terahertz pulse wireless communication transmitting device, comprising: an optical frequency comb generating module, for generating an optical frequency comb; a programmable optical processor, connected with the optical frequency comb generating module and used for performing frequency filtering on the generated optical frequency comb to generate multiple paths of output, each of which includes a single wavelength optical local oscillator and a multi-wavelength optical carrier signal; a modulator, disposed on each output optical path to modulate thebaseband signal to the multi-wavelength optical carrier signal; and a photodetector, connected to each modulator and used for acting on the signal output by the modulator to generate a multi-band terahertz pulse, wherein the center frequency of the terahertz pulse is decided by a center wavelength difference of the each path of output single-wavelength local oscillator and the multi-wavelength baseband optical carrier, the period of the terahertz pulse is controlled by a baseband modulation implemented by the modulator, and the width and time interval of the terahertz pulse are controlled bythe number and interval of wavelengths of the multi-wavelength baseband optical carrier.

The invention discloses a programmable NoC 10 Gigabit Ethernet resource network interface system. The programmable NoC 10 Gigabit Ethernet resource network interface system includes a network interface module, a data processing module, a receiving module, an error management module and a protocol support module. The advantages of strong compatibility and long transmission distance of 10 Gigabit Ethernet enable efficient communication between routing nodes and high-performance processors on the network-on-chip. Configure the source address and destination address of each layer of the network and configure the error management function by configuring the port, and provide support for the UDP / IP protocol, and design a more efficient resource network interface structure with protocol support to achieve routing The efficient interconnection of nodes and high-speed data transmission interfaces achieves the purpose of data exchange between the on-chip network and higher-performance processors.

The invention provides a composite semiconductor layer which comprises a silicon-on-insulator (SOI) substrate and a filed effect transistor. The SOI substrate is deposited on a bulk silicon material, and a silicon film is deposited on the SOI substrate. The field effect transistor is arranged on the silicon film, a source electrode of the field effect transistor is connected onto a second auxiliary input / output signal line through a first via hole, the second auxiliary input / output signal line is connected onto a first auxiliary input / output signal line through a third via hole, a drain electrode is connected onto a first metal electrode through a second via hole, the first metal electrode is connected onto a second metal electrode through a fourth via hole, one end of the second metal electrode is connected onto a second input / output signal line through a first through hole, and a ferroelectric layer, an antiferromagnetic layer, a lower ferromagnetic layer, a tunnel insulating barrier layer, an upper ferromagnetic layer and a top cover layer are sequentially deposited at the other end of the second metal electrode. The antiferromagnetic layer is connected onto a third input / output signal line through a second through hole, and the top cover layer is connected onto the first input / output signal line through a fifth via hole.

The purpose of the present invention is to provide a high-speed communication method and a high-speed communication system, capable of resolving problems in the prior art, achieving good operability with a simple configuration and at a low cost without requiring major modification or replacement of existing communication-related equipment, and being able to be implemented in a short period of time. In the high-speed communication method and the high-speed communication system (100), a waveform in a unit period time of an analog waveform signal for a carrier wave or a fundamental frequency wave(400) is transformed in response to a digital signal (300) for information BD to be transmitted.