Ultra-wideband transmitter capable of delay-based spectrum shaping and method of driving same
The delay-based spectrum-forming ultra-wideband transmitter addresses power and complexity issues by shaping the spectrum with delayed pulse signals, enabling compliance with regulations and reducing device size for versatile applications.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2025-08-07
- Publication Date
- 2026-05-15
AI Technical Summary
Existing ultra-wideband transmitters face challenges in satisfying spectrum regulations due to increased power consumption and hardware complexity from filter operations, making them unsuitable for small devices.
A delay-based spectrum-forming ultra-wideband transmitter that generates and combines pulse signals with a preset delay to shape the spectrum without separate filters, reducing power consumption and hardware complexity.
The solution enables compliance with spectrum regulations while minimizing power consumption and device size, allowing application in both large and small devices, improving usability and resource efficiency.
Smart Images
Figure KR2025011903_15052026_PF_FP_ABST
Abstract
Description
Delay-based spectrum-forming ultra-wideband transmitter and driving method thereof
[0001] The present disclosure relates to a delay-based spectrum-forming ultra-wideband transmitter and a driving method thereof.
[0002] 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.
[0003] Generally, it is defined as a short-range wireless communication technology that enables ultra-high-speed communication at speeds of over 100 Mbps in the 3.1 to 10.6 GHz frequency band with low power consumption across a very wide band compared to existing spectrums. 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 relatively lower spectral power densities compared to existing narrowband systems or broadband CDMA systems.
[0004] 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.
[0005] 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.
[0006] The frequency bandwidth for ultra-wideband transmission is configured to be implementable using pulse-based transmission technology, which offers the potential to simplify transmitter and receiver configurations. Unlike conventional wireless communication, this pulse-based transmission does not eliminate the frequency synthesis and signal mixing functions required in terms of power consumption and integrated circuit area; however, constraints on Power Spectral Density (PSD) are established to avoid interference with other communication systems. In particular, national committees regarding spectrum regulation (transmission regulation) (such as the FCC and ETSI) mandate the use of a Power Spectral Density mask for broadband impulse radio, making implementation difficult as it requires shaping the transmission pulse. For reference, these national spectrum regulations can be seen in Figure 10.
[0007] To this end, existing ultra-wideband transmitters are equipped with filters to suppress the size of the spectrum around the main lobe, thereby securing additional margin to satisfy this spectrum regulation.
[0008] However, as the number of bits in the data constituting the pulse increases, the complexity of the filter operations leads to increased power consumption or occupies a large area in the device, posing a problem that makes it difficult to apply to small devices.
[0009] For example, if an analog filter is applied between the output stage and the antenna, the complexity of the design increases when a high quality factor is required for the frequency band to be filtered.
[0010] In addition, for digital filters, using high resolution leads to increased power consumption in the filter as well as high hardware complexity.
[0011] Accordingly, the inventors of the present disclosure have invented an ultra-wideband transmitter and a driving method thereof, which can be applied to small devices and thus has improved utility.
[0012] Accordingly, the problem to be solved by the present disclosure is to provide a delay-based spectrum-forming ultra-wideband transmitter and a driving method thereof that can form a spectrum satisfying spectrum regulations of various countries by obtaining a shaping effect without providing a separate filter, and can be implemented in a smaller area, thereby enabling application to small devices as well as large devices, improving usability, and simultaneously improving resource efficiency by reducing power consumption.
[0013] The problems that this disclosure aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description below.
[0014] To solve the problem described above, a delay-based spectrum-forming ultra-wideband transmitter according to an example of the present disclosure is provided. This ultra-wideband transmitter may include: a clock generator that generates and outputs at least one clock signal having a fixed period; a pulse generator that receives the clock signal generated from the clock generator and generates a first pulse signal and at least one second pulse signal having a preset frequency band; a pulse shaping unit that shapes the first pulse signal and the at least one second pulse signal to correspond to a transmission method; a multiplexer that selects one of the at least one clock signal based on phase data and outputs a carrier wave; a power amplifier that amplifies each pulse signal shaped by the pulse shaping unit or a combined pulse signal resulting from the combination of each shaped pulse signal; and a combining unit disposed before or after the power amplifier that combines and outputs each pulse signal shaped by the pulse shaping unit or each pulse signal amplified by the power amplifier.
[0015] According to the features of the present disclosure, the at least one second pulse signal may be a pulse signal having the same shape as the first pulse signal and time-shifting the first pulse signal by a preset delay time.
[0016] According to the features of the present disclosure, the delay time may be a constant multiple of the clock period, or a synchronous delay or an asynchronous delay.
[0017] According to the features of the present disclosure, the pulse generation unit may include a shift register composed of a D flip-flop as a delay circuit.
[0018] According to the features of the present disclosure, the pulse shaping unit can shape the first pulse signal and the at least one second pulse signal to satisfy a pre-stored spectrum mask.
[0019] According to the features of the present disclosure, the power amplifier is composed of at least one and can amplify each formed pulse signal or the combined pulse signal according to a preset amplification rate based on size data that is a single bit.
[0020] According to the features of the present disclosure, when the coupling unit is positioned prior to the power amplifier, each formed pulse signal output from the pulse shaping unit is coupled in the digital domain, and the coupled pulse signal output from the coupling unit can be up-converted by the carrier wave through the power amplifier and output.
[0021] According to the features of the present disclosure, when the coupling unit is positioned after the power amplifier, each amplified pulse signal output from the power amplifier is coupled in the RF domain, and when each shaped pulse signal output from the pulse shaping unit is input to each power amplifier and multiplied by the carrier wave to be output, each waveform can be coupled and output by the coupling unit.
[0022] To solve the problem described above, a driving method in a delay-based spectrum-forming ultra-wideband transmitter according to an example of the present disclosure is provided. The driving method may include: a step in which a clock generator generates and outputs at least one clock signal having a constant period; a step in which a pulse generator receives the clock signal generated from the clock generator and generates a first pulse signal and at least one second pulse signal having a preset frequency band; a step in which a pulse shaping unit shapes the first pulse signal and the at least one second pulse signal to correspond to a transmission method; a step in which a coupling unit combines and outputs each pulse signal output from the pulse shaping unit; and a step in which a power amplifier amplifies the pulse signal combined by the coupling unit.
[0023] According to the features of the present disclosure, the at least one second pulse signal may be a pulse signal having the same shape as the first pulse signal and time-shifting the first pulse signal by a preset delay time.
[0024] According to the features of the present disclosure, the delay time may be a constant multiple of the clock period, or a synchronous delay or an asynchronous delay.
[0025] According to the features of the present disclosure, the step of shaping the first pulse signal and the at least one second pulse signal to correspond to a transmission method may be to shape the first pulse signal and the at least one second pulse signal to satisfy a pre-stored spectrum mask.
[0026] According to the features of the present disclosure, the step of amplifying the pulse signal combined by the coupling member may be to amplify the combined pulse signal according to a preset amplification rate based on size data that is a single bit.
[0027] According to the features of the present disclosure, the step of amplifying the combined pulse signal may be that the power amplifier up-converts the combined pulse signal by the carrier wave and outputs it.
[0028] To solve the problem described above, a driving method in a delay-based spectrum-forming ultra-wideband transmitter according to another example of the present disclosure is provided. The driving method may include the steps of: a clock generator generating and outputting at least one clock signal having a constant period; a pulse generator receiving the clock signal generated from the clock generator and generating a first pulse signal and at least one second pulse signal having a preset frequency band; a pulse shaping unit shaping the first pulse signal and the at least one second pulse signal to correspond to a transmission method; a power amplifier amplifying each pulse signal shaped by the pulse shaping unit; and a combining unit combining and outputting each amplified pulse signal output from the power amplifier.
[0029] According to the features of the present disclosure, the at least one second pulse signal may be a pulse signal having the same shape as the first pulse signal and time-shifting the first pulse signal by a preset delay time.
[0030] According to the features of the present disclosure, the delay time may be a constant multiple of the clock period, or a synchronous delay or an asynchronous delay.
[0031] According to the features of the present disclosure, the step of shaping the first pulse signal and the at least one second pulse signal to correspond to a transmission method may be to shape the first pulse signal and the at least one second pulse signal to satisfy a pre-stored spectrum mask.
[0032] According to the features of the present disclosure, the step of amplifying each formed pulse signal may be to amplify each formed pulse signal according to a preset amplification rate based on size data which is a single bit.
[0033] According to the features of the present disclosure, the step of combining each amplified pulse signal is such that when each formed pulse signal output from the pulse forming unit is input to each power amplifier and multiplied by the carrier wave to be output, each waveform can be combined and output by the combining unit.
[0034] Specific details of other embodiments are included in the detailed description and drawings.
[0035] According to one example of the present disclosure, a shaping effect can be obtained without providing a separate filter, thereby forming a spectrum that satisfies the spectrum regulations of various countries, and by enabling implementation in a smaller area, it can be applied not only to large devices but also to small devices, thereby improving usability and reducing power consumption, which can improve resource efficiency.
[0036] The effects of the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description below.
[0037] Figure 1 is a diagram schematically showing the configuration of an ultra-wideband transmitter according to a comparative example.
[0038] Figure 2 is a diagram illustrating the characteristics of a spectrum generated by an ultra-wideband transmitter according to a comparative example.
[0039] FIG. 3 is a diagram illustrating the operation of combining a first pulse signal and a second pulse signal in an ultra-wideband transmitter according to a first embodiment of the present disclosure.
[0040] FIG. 4 is a diagram illustrating the operation of combining a first pulse signal and a second pulse signal in an ultra-wideband transmitter according to a second embodiment of the present disclosure.
[0041] FIG. 5 is a block diagram schematically showing the configuration of an ultra-wideband transmitter according to a first embodiment of the present disclosure.
[0042] FIG. 6 is a block diagram schematically showing the configuration of an ultra-wideband transmitter according to a second embodiment of the present disclosure.
[0043] FIG. 7 is a diagram illustrating a driving method of an ultra-wideband transmitter according to a first embodiment of the present disclosure.
[0044] FIG. 8 is a diagram illustrating a driving method of an ultra-wideband transmitter according to a second embodiment of the present disclosure.
[0045] FIG. 9 is a diagram showing an example of a spectrum generated as a first pulse signal and a second pulse signal are combined by an ultra-wideband transmitter according to the present disclosure.
[0046] Figure 10 is a diagram showing spectrum regulations for each country.
[0047] 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.
[0048] 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.
[0049] 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.
[0050] 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 similarly, the second component may be renamed the first component.
[0051] Where it is stated that a certain component (e.g., a first component) is "(operatively or communicatively) coupled with" or "connected to" another component (e.g., a second component), it should be understood that the said certain component may be directly connected to the said other component or connected through another component (e.g., a third component). On the other hand, where it is stated that a certain component (e.g., a first component) is "directly connected" or "directly connected" to another component (e.g., a second component), it may be understood that no other component (e.g., a third component) exists between the said certain component and the said other component.
[0052] As used in this document, the expression “configured to” may be replaced, depending on the context, with, for example, “suitable for,” “having the capacity to,” “designed to,” “adapted to,” “made to,” or “capable of.” The term “configured to” does not necessarily mean “specifically designed to” in hardware. Instead, in some situations, the expression “device configured to” may mean that the device is “capable of” in conjunction with other devices or components. For example, the phrase “processor configured to perform A, B, and C” may mean a dedicated processor for performing those operations (e.g., an embedded processor) or a generic-purpose processor (e.g., a CPU or application processor) capable of performing those operations by executing one or more software programs stored in a memory device.
[0053] The terms used in this document are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this document. Terms used in this document that are defined in general dictionaries may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this document. In some cases, even terms defined in this document may not be interpreted to exclude the embodiments of this document.
[0054] The features of each of the various embodiments of the present disclosure may be combined or combined with one another, either partially or wholly, and as will be fully understood by those skilled in the art, various technical interlocking and operation are possible, and each embodiment may be implemented independently of one another or together in an interlocking relationship.
[0055] For clarity in the interpretation of this specification, the terms used in this specification are defined below.
[0056] Hereinafter, the present disclosure will be described in detail by explaining preferred embodiments of the present disclosure with reference to the attached drawings.
[0057] Figure 1 is a diagram schematically showing the configuration of an ultra-wideband transmitter according to a comparative example.
[0058] Referring to FIG. 1, a broadband transmitter (100) according to a comparative example may include a converter (10), a filter (20), a mixer (30), a pre-amplifier (Pre-PA) (40), a power amplifier (PA) (50), and an antenna (60).
[0059] First, the conversion unit (10) is a digital-to-analog converter (DAC) that receives a digital signal and converts it into an analog signal.
[0060] The filter unit (20) is an Analog Baseband (ABB) filter that performs filtering on an analog signal output through the converter (10) to form a signal for input to the mixer unit (30). At this time, the filter unit (20) can output only a signal of a desired frequency band through filtering.
[0061] For example, ABB filters can be used for wireless transceivers that support wireless communication technologies of various bandwidths, such as GSM (Global System for Mobile communications), EDGE (Enhanced Data GSM Environment), HSPA (High Speed Packet Access), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution) 1.4M, LTE 3M, LTE 5M, LTE 10M, LTE 15M, and LTE 20M.
[0062] The mixer unit (30) mixes the frequency signal output through the filter unit (20) with the LO (Local Oscillator) signal to generate an output signal, that is, a radio frequency signal.
[0063] The preamplifier (40) and power amplifier (50) amplify the output signal to generate a transmission signal, and transmit the transmission signal to the outside through the antenna included in the antenna unit (60).
[0064] As illustrated in FIG. 1, the ultra-wideband transmitter (100) according to the comparative example is equipped with filters such as a digital notch filter and an analog filter.
[0065] Figure 2 is a diagram illustrating the characteristics of a spectrum generated by an ultra-wideband transmitter according to a comparative example.
[0066] Referring to FIG. 2, (a) shows a comparison of the power spectral density formed when a general filter is applied to an ultra-wideband transmitter (100) according to a comparison example and the spectral mask according to spectral regulation, and (b) shows a comparison of the power spectral density formed when a notch filter is applied to an ultra-wideband transmitter (100) according to a comparison example and the spectral mask according to spectral regulation.
[0067] First, as shown in (a), when a general filter is applied, the power spectral density (dotted line) does not linearly satisfy the spectral mask (solid line).
[0068] On the other hand, as shown in (b), when a notch filter is applied, the power spectral density (dotted line) can secure an additional margin for the spectral mask as it suppresses the magnitude of the power spectral density around the main lobe.
[0069] As previously discussed, the ultra-wideband transmitter (100) according to the comparative example is equipped with filters such as a digital notch filter and an analog filter to suppress the spectrum size in order to satisfy spectrum regulation. However, as such filters are equipped, they not only occupy a large area within the device, but also inevitably consume more power than when no filters are equipped.
[0070] Accordingly, the present disclosure proposes an ultra-wideband transmitter capable of satisfying various spectrum regulations without being equipped with such filters.
[0071] Specifically, the ultra-wideband transmitter according to the present disclosure suppresses the spectral magnitude of a specific band by generating and combining a pulse signal having a specific shape and a delayed pulse signal having the same shape as the pulse signal. At this time, the pulse signal and the delayed pulse signal can be combined in the digital domain or the RF domain, and the two cases will be described below as the first embodiment and the second embodiment, respectively.
[0072] FIG. 3 is a diagram illustrating the operation of combining a first pulse signal and a second pulse signal in an ultra-wideband transmitter according to a first embodiment of the present disclosure, and relates to a first embodiment of combining a pulse signal and a delayed pulse signal in the digital domain.
[0073] Referring to FIG. 3, a first pulse signal that is formed and output by a pulse shaper (PS) and a second pulse signal having a constant delay time (τ) based on the first pulse signal are combined and then input to a power amplifier (PA).
[0074] In other words, as shown in FIG. 3 (a), in the ultra-wideband transmitter (1000) according to the first embodiment, the first pulse signal and the second pulse signal output from the pulse shaper (PS) are combined before being input to the power amplifier (PA), and then the combined pulse signal is input to the power amplifier (PA) to amplify the pulse signal, which is then carried on a carrier wave and transmitted through an antenna.
[0075] Accordingly, as shown in FIG. 3(b), a first pulse signal (thick solid line) and a second pulse signal (thin solid line) delayed for a certain time from the first pulse signal are combined to generate a combined pulse signal (medium solid line).
[0076] FIG. 4 is a drawing for explaining the operation of combining a first pulse signal and a second pulse signal in an ultra-wideband transmitter according to a second embodiment of the present disclosure, and relates to a second embodiment of combining a pulse signal and a delayed pulse signal in the RF domain.
[0077] Referring to FIG. 4, a first pulse signal output by a pulse shaper (PS) and a second pulse signal having a constant delay time (τ) relative to the first pulse signal are input to a power amplifier (PA) and then combined.
[0078] In other words, in the ultra-wideband transmitter (2000) according to the second embodiment, a first pulse signal and a second pulse signal output from a pulse shaper (PS) are input to respective power amplifiers (PA), and then the amplified first pulse signal and the amplified second pulse signal output from each power amplifier (PA) are combined to transmit a combined pulse signal through an antenna. At this time, the first pulse signal and the second pulse signal are amplified and carried on a carrier wave, and then the two pulse signals are combined.
[0079] Accordingly, as shown in the left diagram of (b) in FIG. 4, a first pulse signal (solid line) amplified and a second pulse signal (dotted line) amplified after a certain time delay from the first pulse signal are combined, a combined pulse signal can be generated as shown in the right diagram of (b).
[0080] However, in FIGS. 3 and 4, the second pulse signal generated based on the first pulse signal is depicted as being one, but this is merely an example, and at least one second pulse signal may be generated, and the number is not limited.
[0081] FIG. 5 is a block diagram schematically showing the configuration of an ultra-wideband transmitter according to a first embodiment of the present disclosure.
[0082] Referring to FIG. 5, the ultra-wideband transmitter (1000) may include a clock generator (110), a pulse generator (120), a pulse shaping unit (130), a multiplexer (140), a power amplifier (150), and an antenna (160).
[0083] When an input signal to be transmitted is input, the clock generation unit (110) generates and outputs at least one clock signal having a constant period.
[0084] The pulse generation unit (120) receives at least one clock signal generated from the clock generation unit (110) and generates a first pulse signal and at least one second pulse signal having a preset frequency band.
[0085] At this time, at least one second pulse signal may have the same shape as the first pulse signal and may be a pulse signal obtained by time-shifting the first pulse signal by a preset delay time. Here, the delay time may be a constant multiple of the clock period, and if there are multiple second pulse signals, the delay times reflected in each second pulse signal may differ from one another. Additionally, each of the at least one second pulse signals may have a synchronous delay or an asynchronous delay, and the method of setting is not limited.
[0086] The pulse forming part (130) forms the first pulse signal and at least one second pulse signal to correspond to the transmission method.
[0087] At this time, the pulse forming section (130) may be configured as a delay circuit, for example, by including a shift register composed of D flip-flops.
[0088] The multiplexer (140) selects at least one clock signal based on input phase data and outputs a carrier wave.
[0089] Meanwhile, although not shown in FIG. 5, a coupling unit for combining a first pulse signal and at least one second pulse signal is further provided to combine the formed first pulse signal and the formed at least one second pulse signal that are formed and output by the pulse forming unit (130), and the combined pulse signal is input to the power amplifier (150).
[0090] The power amplifier (150) amplifies the pulse signal combined by the coupling unit to a predetermined level.
[0091] At this time, the power amplifier (150) may be composed of at least one or more, and amplifies the pulse signal combined by the coupling unit according to a preset amplification rate based on size data that is a single bit.
[0092] Accordingly, the power amplifier (150) can output the combined pulse signal by up-converting it with a carrier wave.
[0093] The antenna (160) transmits the pulse signal amplified by the power amplifier (150) by carrying it on a carrier wave as a transmission signal.
[0094] FIG. 6 is a block diagram schematically showing the configuration of an ultra-wideband transmitter according to a second embodiment of the present disclosure.
[0095] Referring to FIG. 6, the ultra-wideband transmitter (2000) may include a clock generator (210), a pulse generator (220), a pulse shaping unit (230), a multiplexer (240), a power amplifier (250), and an antenna (260).
[0096] Each of these components corresponds to the clock generator (110), pulse generator (120), pulse shaping unit (130), multiplexer (140), power amplifier (150), and antenna (160) of FIG. 5 described above, and performs the same operation. Therefore, a detailed description of the operation is omitted.
[0097] However, in the case of the second embodiment, each formed pulse signal output from the pulse forming unit (230) is input to each power amplifier (150), and a first pulse signal amplified from each power amplifier (150) and at least one amplified second pulse signal are output. Subsequently, a combining unit combines each amplified pulse signal output from each power amplifier (250). Here, although not shown in FIG. 6, the combining unit may be connected to the output terminal of each power amplifier (250) to combine the amplified first pulse signal and at least one amplified second pulse signal.
[0098] In actual implementation, the coupling part can be coupled via capacitive coupling or in the current domain, or power can be coupled using a transformer, etc.
[0099] Accordingly, each formed pulse signal output from the pulse forming unit (230) is input to each power amplifier (250) and multiplied by a carrier wave to be output, and each waveform can be combined and output by the combining unit.
[0100] Afterwards, the antenna (260) carries the combined pulse signal on a carrier wave and transmits it as a transmission signal.
[0101] FIG. 7 is a diagram illustrating a driving method of an ultra-wideband transmitter according to a first embodiment of the present disclosure.
[0102] Referring to FIG. 7, when an input signal to be transmitted is input, the clock generation unit (110) generates and outputs at least one clock signal having a constant period (S110).
[0103] Next, the pulse generator (120) receives at least one clock signal generated from the clock generator (110) and generates a first pulse signal and at least one second pulse signal having a preset frequency band (S120).
[0104] As previously explained, at least one second pulse signal may be a first pulse signal time-shifted by a preset delay time.
[0105] Next, the pulse shaping unit (130) shapes the first pulse signal and at least one second pulse signal output by step S120 to correspond to the transmission method (S130). Here, the transmission method may be pre-set for ultra-wideband transmission, and its type and form are not limited.
[0106] Next, the combining unit combines and outputs each formed pulse signal output from the pulse forming unit (130) (S140), and then the power amplifying unit (150) amplifies and outputs the combined pulse signal output from the combining unit (S150).
[0107] Thus, the pulse signal amplified by the power amplifier (150) can be transmitted as a transmission signal through the antenna (160). At this time, the transmission signal can be transmitted carried on a carrier wave output by the multiplexer (140).
[0108] FIG. 8 is a diagram illustrating a driving method of an ultra-wideband transmitter according to a second embodiment of the present disclosure.
[0109] Steps S210 to S230 of Fig. 8 are identical to steps S110 to S130 described above, so a detailed explanation thereof will be omitted.
[0110] However, in the case of the second embodiment, each pulse signal formed by the preceding step S230 is combined after being amplified by each power amplifier (250). After step S230, when each power amplifier (250) amplifies and outputs each pulse signal formed by the pulse forming unit (230) (S240), the combining unit combines and outputs each amplified pulse signal output from each power amplifier (250) (S250).
[0111] Thus, each pulse signal amplified by each power amplifier (250) can be transmitted as a transmission signal through the antenna (160). At this time, the transmission signal can be transmitted carried on a carrier wave output by the multiplexer (240).
[0112] FIG. 9 is a diagram showing an example of a spectrum generated as a first pulse signal and a second pulse signal are combined by an ultra-wideband transmitter according to the present disclosure.
[0113] Referring to FIG. 9, the spectrum of a specific frequency band can be suppressed through the ultra-wideband transmitter according to the present disclosure, thereby minimizing interference between adjacent channels. In addition, as the power spectrum density can more reliably satisfy spectrum regulations of a wider variety of countries, it is advantageous for improving communication quality.
[0114] Meanwhile, the ultra-wideband transmitter according to the present disclosure not only possesses superior characteristics in that it can significantly reduce circuit complexity, power consumption, and area compared to conventional filter-based spectral shapes, but also improves usability by allowing for useful application in small devices due to the reduced chip area. Furthermore, it can improve resource efficiency by reducing power consumption.
[0115] The examples of the present disclosure disclosed in this specification and drawings are provided merely to facilitate the explanation of the technical content of the present disclosure and to aid in understanding the present disclosure, and are not intended to limit the scope of the present name. It is obvious to those skilled in the art that other variations based on the technical concept of the invention are possible in addition to the examples disclosed herein.
[0116] [National R&D projects that supported this invention]
[0117] [Project ID] 2710086103
[0118] [Assignment No.] 02303581
[0119] [Ministry Name] Ministry of Science and ICT
[0120] [Name of Project Management (Specialized) Agency] National Research Foundation of Korea
[0121] [Research Project Name] Biomedical Technology Development (R&D)
[0122] [Project Title] Development of a Hyper-connected, Wireless Sleep Diagnosis System for Digital Healthcare
[0123] [Name of Project Performing Organization] Daegu Gyeongbuk Institute of Science and Technology
[0124] [Research Period] April 1, 2025 ~ December 31, 2025
[0125] [National R&D projects that supported this invention]
[0126] [Project ID] 2710018254
[0127] [Assignment No.] 00416319
[0128] [Ministry Name] Ministry of Science and ICT
[0129] [Name of Project Management (Specialized) Agency] National Research Foundation of Korea
[0130] [Research Project Name] Group Research Support
[0131] [Research Project Title] Precision Backtracking Machine Learning-Based Minimally Invasive / Non-Invasive Multimode Wireless Brain-Computer Interface Laboratory
[0132] [Name of Project Performing Organization] Daegu Gyeongbuk Institute of Science and Technology
[0133] [Research Period] 2024.08.01 ~ 2025.07.31
[0134] [National R&D projects that supported this invention]
[0135] [Project ID] 2710083014
[0136] [Assignment No.] 02219277
[0137] [Ministry Name] Ministry of Science and ICT
[0138] [Project Management (Specialized) Agency Name] Korea Institute of Information & Communications Technology Planning & Evaluation
[0139] [Research Project Name] AI Star Fellowship Support
[0140] [Research Project Title] AI Star Fellowship Support (Daegu Gyeongbuk Institute of Science and Technology)
[0141] [Name of Project Performing Organization] Daegu Gyeongbuk Institute of Science and Technology
[0142] [Research Period] April 1, 2025 ~ December 31, 2025
Claims
1. A clock generation unit that generates and outputs at least one clock signal having a fixed period; A pulse generation unit that receives a clock signal generated from the above clock generation unit and generates a first pulse signal having a preset frequency band and at least one second pulse signal; A pulse forming unit that forms the first pulse signal and the at least one second pulse signal to correspond to a transmission method; A multiplexer that selects one of the at least one clock signal based on phase data and outputs a carrier wave; A power amplifier that amplifies each pulse signal formed by the pulse forming unit or a combined pulse signal according to the combination of each formed pulse signal; and A combining unit positioned before or after the power amplifier, which combines and outputs each pulse signal formed by the pulse shaping unit or each pulse signal amplified by the power amplifier. Ultra-wideband transmitter.
2. In Paragraph 1, The above at least one second pulse signal is, A pulse signal having the same shape as the first pulse signal and time-shifting the first pulse signal by a preset delay time, Ultra-wideband transmitter.
3. In Paragraph 1, The above delay time is, A constant multiple of the clock period, or a synchronous or asynchronous delay Ultra-wideband transmitter.
4. In Paragraph 1, The above pulse generating unit is, A shift register comprising D flip-flops as a delay circuit, Ultra-wideband transmitter.
5. In Paragraph 1, The above pulse forming unit is, Shaping the first pulse signal and the at least one second pulse signal to satisfy a pre-stored spectrum mask, Ultra-wideband transmitter.
6. In Paragraph 1, The above power amplifier is, Composed of at least one or more, amplifying each formed pulse signal or the combined pulse signal according to a preset amplification rate based on single-bit size data, Ultra-wideband transmitter.
7. In Paragraph 1, When the above coupling part is positioned before the power amplifier part, Each formed pulse signal output from the pulse forming unit is combined in the digital domain, wherein the combined pulse signal output from the combining unit is up-converted by the carrier wave through the power amplifier and output. Ultra-wideband transmitter.
8. In Paragraph 1, When the above coupling part is positioned after the power amplifier part, Each amplified pulse signal output from the power amplifier is combined in the RF domain, wherein each shaped pulse signal output from the pulse shaping unit is input to each power amplifier and multiplied by the carrier wave to be output, and each waveform is combined by the combining unit and output. Ultra-wideband transmitter.
9. In a method for driving an ultra-wideband transmitter, A step in which a clock generation unit generates and outputs at least one clock signal having a constant period; A pulse generation unit receives a clock signal generated from the clock generation unit and generates a first pulse signal having a preset frequency band and at least one second pulse signal; A step in which a pulse shaping unit shapes the first pulse signal and the at least one second pulse signal to correspond to a transmission method; A step in which a combining part combines and outputs each formed pulse signal output from the pulse forming part; and A power amplifier including the step of amplifying and outputting a pulse signal coupled by the coupling unit, Driving method of an ultra-wideband transmitter.
10. In Paragraph 9, The above at least one second pulse signal is, A pulse signal having the same shape as the first pulse signal and time-shifting the first pulse signal by a preset delay time, Driving method of an ultra-wideband transmitter.
11. In Paragraph 9, The above delay time is, A constant multiple of the clock period, or a synchronous or asynchronous delay Driving method of an ultra-wideband transmitter.
12. In Paragraph 9, The step of shaping the first pulse signal and the at least one second pulse signal to correspond to a transmission method is The first pulse signal and the at least one second pulse signal are shaped to satisfy a pre-stored spectrum mask. Driving method of an ultra-wideband transmitter.
13. In Paragraph 9, The step of amplifying the pulse signal combined by the above-mentioned coupling part is, Amplifying the combined pulse signal according to a preset amplification rate based on single-bit size data, Driving method of an ultra-wideband transmitter.
14. In Paragraph 9, The step of amplifying the combined pulse signal described above is, The above power amplifier outputs the combined pulse signal by up-converting it with the carrier wave. Driving method of an ultra-wideband transmitter.
15. In a method for driving an ultra-wideband transmitter, A step in which a clock generation unit generates and outputs at least one clock signal having a constant period; A pulse generation unit receives a clock signal generated from the clock generation unit and generates a first pulse signal having a preset frequency band and at least one second pulse signal; A step in which a pulse shaping unit shapes the first pulse signal and the at least one second pulse signal to correspond to a transmission method; A step in which a power amplifier amplifies each pulse signal formed by the pulse forming unit; and A combining unit comprising the step of combining and outputting each amplified pulse signal output from the power amplifier, Driving method of an ultra-wideband transmitter.
16. In Paragraph 15, The above at least one second pulse signal is, A pulse signal having the same shape as the first pulse signal and time-shifting the first pulse signal by a preset delay time, Driving method of an ultra-wideband transmitter.
17. In Paragraph 15, The above delay time is, A constant multiple of the clock period, or a synchronous or asynchronous delay Driving method of an ultra-wideband transmitter.
18. In Paragraph 15, The step of shaping the first pulse signal and the at least one second pulse signal to correspond to a transmission method is The first pulse signal and the at least one second pulse signal are shaped to satisfy a pre-stored spectrum mask. Driving method of an ultra-wideband transmitter.
19. In Paragraph 15, The step of amplifying each of the above-mentioned shaped pulse signals is, Amplifying each formed pulse signal according to a preset amplification rate based on single-bit size data, Driving method of an ultra-wideband transmitter.
20. In Paragraph 15, The step of combining each of the amplified pulse signals above is, When each formed pulse signal output from the pulse forming unit is input to each power amplifier and multiplied by the carrier wave to produce an output, each waveform is combined by the coupling unit and output. Driving method of an ultra-wideband transmitter.