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KR-20260067827-A - DITHER-SYNCHRONOUS ULTRA WIDEBAND TRANSMITTER AND ITS DRIVING METHOD

KR20260067827AKR 20260067827 AKR20260067827 AKR 20260067827AKR-20260067827-A

Abstract

A dithering synchronous ultra-wideband transmitter and a driving method thereof are provided according to an example of the present disclosure. In particular, the ultra-wideband transmitter may include: a clock generation unit that generates and outputs at least one random phase clock signal in which the phase of the clock is changed based on random data; a pulse shaping unit that receives the at least one random phase clock signal generated from the clock generation unit and generates a pulse signal having a preset frequency band to shape it to correspond to a transmission method; a multiplexer that selects one of the at least one multiple clock phase signals based on phase data and outputs a carrier wave; a power amplifier that outputs each pulse signal shaped by the pulse shaping unit by multiplying the carrier wave; and an antenna unit that transmits each quantized pulse signal.

Inventors

  • 송민영
  • 김찬영
  • 박민수

Assignees

  • 재단법인대구경북과학기술원

Dates

Publication Date
20260513
Application Date
20241106

Claims (20)

  1. A clock generation unit that generates and outputs at least one random phase clock signal in which the phase of the clock changes based on random data; A pulse shaping unit that receives at least one random phase clock signal generated from the clock generation unit, generates a pulse signal having a preset frequency band, and shapes it to correspond to a transmission method; A multiplexer that selects one of the at least one multi-clock phase signal based on phase data and outputs a carrier wave; A power amplifier that outputs each pulse signal quantized at a time interval with dithering applied by multiplying each pulse signal formed by the pulse shaping unit by the carrier wave; and Includes an antenna unit that transmits the above-mentioned quantized pulse signal, Ultra-wideband transmitter.
  2. In paragraph 1, The above clock generation unit is, A multi-phase generator that generates at least one multi-phase clock signal for dithering; A random signal generation unit that generates the above random data; and A phase selection logic comprising receiving as input the at least one multi-phase clock signal generated by the multi-phase generator and the random data generated by the random signal generator, and randomly selecting and outputting one of the at least one multi-phase clock signals. Ultra-wideband transmitter.
  3. In paragraph 2, The above phase selection logic is, When the random data generated by the random signal generator is input, the current phase and the next phase are distinguished using a flip-flop and the order is compared to determine whether a defect has occurred, and if it is determined that a defect is likely to occur, the output value is fixed to Low or High at the corresponding timing to eliminate the defect. Ultra-wideband transmitter.
  4. In paragraph 2, The above multi-phase generator is, Generating at least one multi-phase clock signal by equalizing the input clock signal to N based on a delay-locked loop (DLL), Ultra-wideband transmitter.
  5. In paragraph 2, The above delay-locked loop is, Input phase in a negative feedback loop ( ) output phase( Forcing alignment with ), Ultra-wideband transmitter.
  6. In paragraph 2, The above multiplexer is, Selecting a clock signal having a preset phase among the at least one multi-phase clock signal as the carrier signal. Ultra-wideband transmitter.
  7. In paragraph 6, The phase corresponding to the above preset threshold is 0° or 180°, Ultra-wideband transmitter.
  8. In paragraph 2, The above random signal generation unit is, Generating the above random data based on PRBS (Pseudo Random Binary Sequence), Ultra-wideband transmitter.
  9. In paragraph 2, The above random data is, Used as a control signal to control the multiplexer within the above phase selection logic, and changing at preset periods, Ultra-wideband transmitter.
  10. In paragraph 1, The above pulse forming unit is, A device that receives size data and at least one random phase clock signal, synchronizes the random phase clock signal to generate at least one pulse signal that forms the shape of a specific pulse, Ultra-wideband transmitter.
  11. In a driving method for an ultra-wideband transmitter, A step in which a clock generation unit generates and outputs at least one random phase clock signal in which the phase of the clock changes based on random data; A step in which a pulse shaping unit receives at least one random phase clock signal generated from the clock generation unit, generates a pulse signal having a preset frequency band, and shapes it to correspond to a transmission method; A step in which a multiplexer selects one of the at least one multiple clock phase signal based on phase data and outputs a carrier wave; A step in which a power amplifier multiplies each pulse signal formed by the pulse shaping unit by the carrier wave to output each pulse signal quantized at a time interval with dithering applied; and The antenna unit includes the step of transmitting the quantized each pulse signal. Driving method of an ultra-wideband transmitter.
  12. In Paragraph 11, The step of generating and outputting at least one random phase clock signal is, A multi-phase generation unit generates at least one multi-phase clock signal for dithering; A random signal generator generates the random data; and The phase selection logic receives as input the at least one multi-phase clock signal generated by the multi-phase generator and the random data generated by the random signal generator, and includes the step of randomly selecting and outputting one of the at least one multi-phase clock signals. Driving method of an ultra-wideband transmitter.
  13. In Paragraph 12, When the random data generated by the random signal generator is input, a step of determining whether a defect has occurred by distinguishing the current phase and the next phase using a flip-flop and comparing the order; and If it is determined that a defect is likely to occur, the method further includes a step of fixing the output value to Low or High at the corresponding timing to eliminate the defect. Driving method of an ultra-wideband transmitter.
  14. In Paragraph 12, The step of generating at least one multi-phase clock signal is, Generating at least one multi-phase clock signal by equalizing the input clock signal to N based on a delay-locked loop (DLL), Driving method of an ultra-wideband transmitter.
  15. In Paragraph 12, The above delay-locked loop is, Input phase in a negative feedback loop ( ) output phase( Forcing alignment with ), Driving method of an ultra-wideband transmitter.
  16. In Paragraph 12, The step of selecting one of the above at least one multiple clock phase signal to output a carrier wave is: Selecting a clock signal having a preset phase among the at least one multi-phase clock signal as the carrier signal. Driving method of an ultra-wideband transmitter.
  17. In Paragraph 16, The above preset phase is 0° or 180°, Driving method of an ultra-wideband transmitter.
  18. In Paragraph 12, The above random signal generation unit further includes the step of generating the random data based on PRBS (Pseudo Random Binary Sequence), Driving method of an ultra-wideband transmitter.
  19. In Paragraph 12, The above random data is, Used as a control signal to control the multiplexer within the above phase selection logic, and changing at preset periods, Driving method of an ultra-wideband transmitter.
  20. In Paragraph 11, The step of generating the above pulse signal and shaping it to correspond to the transmission method is, The method of receiving size data and at least one random phase clock signal as input, synchronizing the random phase clock signal to generate at least one pulse signal that constitutes the shape of a specific pulse, Driving method of an ultra-wideband transmitter.

Description

Dither-Synchronous Ultra Wideband Transmitter and Its Driving Method The present disclosure relates to a dithering synchronous ultra-wideband transmitter and a driving method thereof. Ultra-wideband (UWB) is a wireless communication technology that enables the transmission of large amounts of information with low power by using a wide spectrum of frequencies over short distances compared to the conventional spectrum, and is also known as wireless digital pulse. Generally, it is defined as a short-range wireless communication technology that realizes ultra-high-speed communication at speeds of 100 Mbps or higher in the frequency band of 3.1 to 10.6 GHz with low power consumption across a very wide band compared to the existing spectrum. The most significant feature of UWB is that it utilizes an ultra-wideband while maintaining relatively low output power. Furthermore, ultra-wideband systems are constructed based on a relatively lower spectral power density compared to existing narrowband systems or broadband CDMA systems. It is highly useful because it is significantly superior to existing wireless communication technologies in terms of speed and power consumption. In particular, it is emerging as a groundbreaking technology suitable for Personal Area Networks (PANs) that connect personal computers, peripherals, and/or home appliances located within a certain distance from offices and homes using a high-speed wireless interface. The background art is provided to facilitate understanding of the present disclosure. It should not be understood as an acknowledgment that the matters described in the background art exist as prior art. Figure 1 is a diagram schematically showing the configuration of an ultra-wideband transmitter according to a comparative example. FIG. 2 is a diagram schematically showing the configuration of an ultra-wideband transmitter according to one embodiment of the present disclosure. FIG. 3 is a diagram showing an example of a random phase clock signal generated according to one embodiment of the present disclosure. FIG. 4 is a diagram schematically showing the configuration of a clock generation unit in an ultra-wideband transmitter according to one embodiment of the present disclosure. FIG. 5 is a diagram showing an example of a multi-phase clock signal generated through a multi-phase generator provided in a clock generator according to one embodiment of the present disclosure. FIG. 6 is a diagram showing an example of random data generated through a random signal generator provided in a clock generator according to one embodiment of the present disclosure. FIGS. 7 to 12 are drawings for explaining the detailed configuration of a phase selection logic provided in a clock generation unit according to one embodiment of the present disclosure. FIG. 13 is a flowchart schematically illustrating a driving method of an ultra-wideband transmitter according to one embodiment of the present disclosure. FIG. 14 is a diagram showing an example of power spectral density before and after dithering application based on an ultra-wideband transmitter according to one embodiment of the present disclosure. The advantages and features of the present disclosure and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure is complete and to fully inform those skilled in the art of the scope of the invention, and the present disclosure is defined only by the scope of the claims. In connection with the description of the drawings, similar reference numerals may be used for similar components. In this document, expressions such as "have," "can have," "include," or "can include" refer to the existence of the relevant feature (e.g., numerical values, functions, actions, or components, etc.) and do not exclude the existence of additional features. In this document, expressions such as “A or B,” “at least one of A or/and B,” or “one or more of A or/and B” may include all possible combinations of items listed together. For example, “A or B,” “at least one of A and B,” or “at least one of A or B” may refer to cases including (1) at least one A, (2) at least one B, or (3) both at least one A and at least one B. Expressions such as "first," "second," "first," or "second" used in this document may modify various components regardless of order and/or importance, and are used merely to distinguish one component from another without limiting such components. For example, the first user device and the second user device may represent different user devices regardless of order or importance. For example, without departing from the scope of rights set forth in this document, the first component may be named the second component, and similar