Impulse wireless communication system

Abstract

The impulse wireless communication system of the present invention includes: an oscillation signal generator that generates a plurality of oscillation signals having a delay interval with each other and having the same or different phases and amplitudes; an envelope signal generator that extracts a synchronization signal and a data signal constituting communication signal data and generates an envelope signal for the synchronization signal and an envelope signal for the data signal; a signal synthesizer that synthesizes the plurality of oscillation signals and the plurality of envelope signals to generate an impulse signal; an envelope signal extractor that extracts a plurality of modulated envelope signals from the impulse signal in synchronization with the oscillation signal generator based on the synchronization signal; an amplitude phase determiner that determines the phase and amplitude of the plurality of modulated envelope signals based on the plurality of oscillation signals; and a calculator that extracts the envelope signal from the plurality of modulated envelope signals based on the phase and amplitude.

Description

Technical Field

[0001] The present invention relates to an impulse wireless communication system for performing wireless communication using a broadband impulse signal. Background Art

[0002] Generally speaking, an ultra-wideband (UWB) communication system occupies a much wider frequency band than conventional narrowband or broadband communication systems. A UWB system occupies 20% of the central frequency band or a frequency band of 500 MHz or more.

[0003] As mentioned above, in order to occupy a wide frequency band, UWB systems use very short pulses in terms of time. Therefore, when pulses are used for communication, signals can be transmitted with low power due to the low duty cycle, and are resistant to multipath noise.

[0004] On the other hand, UWB systems utilize pulses to transmit signals and can employ a variety of modulation and demodulation methods. These include Pulse Amplitude Modulation (PAM), which transmits signals based on the amplitude of pulses; On-Off Keying (OOK), which transmits signals based on the presence or absence of pulses; Pulse Shape Modulation (PSM), which transmits signals using distinct pulses; and Pulse Position Modulation (PPM), which transmits signals based on the position of pulses.

[0005] However, although the conventional signal transmission method based on pulse position modulation (PPM) can provide fast communication speed, the time required by the PPM method increases as the data traffic increases, thus limiting the ability to increase the transmission speed based on wireless communication.

[0006] Therefore, there is an urgent need for a technology that increases the transmission speed of wireless communication by using an additional modulation technology in the conventional PPM.

[0007] This invention is derived from research conducted under the Ministry of Science and ICT's ICT Convergence Industry Core Technology Development (R&D) project (Project No. 1711126437, Project No. 2017-0-00418-005, Research Project Name: Time-Domain Artificial Intelligence Radar SoC (System-on-a-Chip) Design Research Using Ultra-High-Speed ​​Sampling Technology, Project Management Agency: Information and Communications Planning Evaluation Agency, Project Execution Agency: Yonsei University Industry-Academic Cooperation Group, Research Period: January 1, 2021 - December 31, 2021). The Korean government has no property interest in any aspect of this invention. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide an impulse wireless communication system that efficiently performs wireless communication of impulse signals by combining different modulation schemes.

[0009] According to one embodiment of the present invention, an impulse wireless communication system includes: an oscillation signal generator, which generates a plurality of oscillation signals having a delay interval with each other and having the same or different phases and amplitudes; an envelope signal generator, which extracts a synchronization signal and a data signal constituting communication signal data and generates an envelope signal for the synchronization signal and an envelope signal for the data signal; a signal synthesizer, which synthesizes the plurality of oscillation signals and the plurality of envelope signals to generate an impulse signal; an envelope signal extractor, which is synchronized with the oscillation signal generator based on the synchronization signal and extracts a plurality of modulated envelope signals from the impulse signal; an amplitude phase determiner, which determines the phase and amplitude in the plurality of modulated envelope signals based on the plurality of oscillation signals; and a calculator, which extracts the envelope signal from the plurality of modulated envelope signals based on the phase and amplitude.

[0010] Furthermore, an oscillation signal generator according to an embodiment of the present invention includes: a first oscillation signal generator, which generates a first oscillation signal sent according to a first amplitude and a first phase corresponding to a first bit value; and a second oscillation signal generator, which generates a second oscillation signal sent according to a second amplitude and a second phase corresponding to a second bit value and which are the same as or different from the first amplitude and the first phase.

[0011] Furthermore, the impulse wireless communication system according to one embodiment of the present invention further includes: a data signal bit calculator, which calculates a third bit value representing the data signal in the communication signal data based on the synchronization signal; and a first data time interval calculator, which calculates a first time interval between a time point when the synchronization signal is generated and a time point when the data signal is generated based on the third bit value.

[0012] Furthermore, the impulse wireless communication system according to one embodiment of the present invention further includes: a synchronization signal extractor for extracting a synchronization signal from the communication signal data; a data signal extractor for extracting a data signal delayed by the first time interval from the communication signal data based on the synchronization signal using the first time interval; a first envelope signal generator for generating a first envelope signal based on the synchronization signal; and a second envelope signal generator for generating a second envelope signal based on the data signal.

[0013] Furthermore, the impulse wireless communication system according to an embodiment of the present invention further includes an oscillation signal bit calculator, which calculates oscillation bit data including a first bit value and a second bit value.

[0014] Furthermore, the impulse wireless communication system according to one embodiment of the present invention further includes: a third oscillation signal generator, which generates a third oscillation signal having the same phase as the first phase of the first oscillation signal and the same amplitude as the first amplitude based on the synchronization signal; and a fourth oscillation signal generator, which generates a fourth oscillation signal having the same phase as the second phase of the second oscillation signal and the same amplitude as the second amplitude based on the synchronization signal.

[0015] Furthermore, the impulse wireless communication system according to one embodiment of the present invention further includes: a first modulation envelope signal extractor, which mixes the third oscillation signal and the impulse signal to extract a first modulation envelope signal corresponding to the first envelope signal; and a second modulation envelope signal extractor, which mixes the fourth oscillation signal and the impulse signal to extract a second modulation envelope signal corresponding to the second envelope signal.

[0016] In addition, the impulse wireless communication system according to one embodiment of the present invention further includes: a modulation envelope signal synthesizer, which synthesizes the first modulation envelope signal and the second modulation envelope signal to generate a first synthesized modulation envelope signal; a comparator, which changes the first synthesized modulation envelope signal equivalent to the analog signal into a second synthesized modulation envelope signal in the form of a rectangular waveform; and an edge detector, which detects, in the second synthesized modulation envelope signal, a first edge time point at which the waveform of the first modulation envelope signal rises and a first polling time point at which the waveform of the second modulation envelope signal is polled, and a second edge time point at which the waveform of the second modulation envelope signal rises and a second polling time point at which the waveform of the second modulation envelope signal is polled.

[0017] Furthermore, the impulse wireless communication system according to one embodiment of the present invention further includes: a first amplitude phase determiner, which determines the phase and amplitude of the first modulated envelope signal corresponding to the first bit value based on the first edge time point and the first polling time point; and a second amplitude phase determiner, which determines the phase and amplitude of the second modulated envelope signal corresponding to the second bit value based on the second edge time point and the second polling time point.

[0018] In addition, according to one embodiment of the present invention, the impulse wireless communication system further includes a second data time interval calculator, which calculates a second time interval between a time point at which the first modulation envelope signal is generated and a time point at which the second modulation envelope signal is generated based on the first edge time point and the second edge time point, wherein the first time interval and the second time interval are the same.

[0019] Furthermore, the impulse wireless communication system according to one embodiment of the present invention further includes a calculator, which calculates a first envelope signal in the first modulated envelope signal based on the phase and amplitude of the first modulated envelope signal, and calculates a second envelope signal in the second modulated envelope signal based on the second time interval and the phase and amplitude of the second modulated envelope signal.

[0020] According to the broadband impulse wireless communication system of the present invention, wireless communication speed can be increased by performing wireless communication of impulse signals by combining different modulation schemes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. 1 is a diagram illustrating an impulse wireless communication system according to an embodiment of the present invention.

[0022] Figure 2 FIG. 1 is a diagram illustrating a signal transmitting device according to an embodiment of the present invention.

[0023] FIG. 3 is a diagram for explaining an MPPM modulation method and a QAM modulation method according to an embodiment of the present invention.

[0024] Figure 4 FIG. 4 is a diagram showing waveforms of first and second oscillation signals according to an embodiment of the present invention.

[0025] Figure 5 FIG. 4 is a diagram showing waveforms of first and second envelope signals according to an embodiment of the present invention.

[0026] Figure 6 FIG. 1 is a diagram illustrating a signal receiving device according to an embodiment of the present invention.

[0027] Figure 7 FIG. 1 is a diagram showing first to second modulation envelope signals according to an embodiment of the present invention.

[0028] Figure 8 A diagram illustrating a transmission signal output from a signal transmitting apparatus and a reception signal received by a signal receiving apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] Hereinafter, with reference to the accompanying drawings, multiple embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. The present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0030] In order to clearly illustrate the present invention, irrelevant parts will be omitted and the same or similar structural elements will be denoted by the same reference numerals throughout the specification. Therefore, the aforementioned reference numerals may also be used in other drawings.

[0031] Furthermore, the size and thickness of each structure shown in the drawings are arbitrarily indicated for the sake of convenience, and therefore the present invention is not necessarily limited to what is shown in the drawings. In order to clearly indicate multiple layers and regions in the drawings, the thickness may be exaggerated.

[0032] Furthermore, the term "same" in the description may mean "substantially the same." In other words, it may mean that a person of ordinary skill would consider the two to be the same. Other terms may be omitted.

[0033] Figure 1 FIG. 1 is a diagram illustrating an impulse wireless communication system according to an embodiment of the present invention.

[0034] An impulse wireless communication system 1 according to an embodiment of the present invention includes a signal transmitting device 10 and a signal receiving device 20 .

[0035] The signal sending device 10 includes a first oscillation signal generator 11 (1), a communication signal data generator 11 (2), a signal synthesizer 12, a signal bit calculator 13, a communication signal extractor 14, a first data time interval calculator 15, an envelope signal generator 16 and a transmitter 17.

[0036] The first oscillation signal generator 11 ( 1 ) can generate a plurality of oscillation signals (LO signals) having mutually delayed intervals, the same or different phases, and the same or different amplitudes based on an input signal applied from the outside.

[0037] The multiple oscillation signals (LO signals) generated by the oscillation signal generator 11 ( 1 ) may be generated according to a quadrature modulation scheme (or Quadrature Amplitude Modulation (QAM)). The multiple oscillation signals (LO signals) may be output with a phase difference of 1 / 4 period.

[0038] Specifically, the multiple oscillation signals (LO signals) generated by the oscillation signal generator 11 ( 1 ) can be output with the same or different amplitudes and the same or different phases according to a quadrature modulation scheme (QAM) selected by a user setting.

[0039] In the oscillation signal generator 11(1), bit values ​​can be assigned to the plurality of oscillation signals (LO signals) in accordance with the amplitudes and phases of the plurality of oscillation signals (LO signals). According to one embodiment of the present invention, the oscillation signal generator 11(1) can assign 4 bits in accordance with the amplitude and phase of any one of the plurality of oscillation signals (LO signals), and the oscillation signal generator 11(1) can assign 4 bits in accordance with the amplitude and phase of another one of the plurality of oscillation signals (LO signals), but the present invention is not limited thereto.

[0040] According to the above-mentioned quadrature modulation method (QAM), the process of the oscillation signal generator 11 (1) generating multiple oscillation signals (LO signals) will be described in the following FIG3 and FIG4. Figure 5 Specific instructions are given in .

[0041] The communication signal data generator 11 (2) can generate a synchronization signal (Syncsignal, see Figure 2 ) and data signal (Data signal, refer to Figure 2 ) and a communication signal data having a vibration frequency of 200 MHz in one cycle (PRF). The communication signal data generator 11 (2) can assign a bit value representing the position of the data signal (Data signal) based on the synchronization signal (Sync signal) from the communication signal data.

[0042] According to one embodiment of the present invention, the communication signal data generator 11 ( 2 ) may allocate a bit value representing the position of the data signal based on the synchronization signal to a 4-bit value in the communication signal data, but the present invention is not limited thereto.

[0043] The communication signal data generator 11(2) may apply the communication signal data to the communication signal extractor 14 in order to generate an envelope signal for the synchronization signal (Sync signal). The communication signal data generator 11(2) may apply the communication signal data to the first data time interval calculator 15 and the communication signal extractor 14 in order to generate an envelope signal for the data signal (Data signal).

[0044] The signal bit calculator 13 can calculate the bit values ​​assigned to the multiple oscillation signals (LO signals) generated by the first oscillation signal generator 11 (1). Based on the phases and amplitudes of the multiple oscillation signals (LO signals), the signal bit calculator 13 can calculate the bit value (4 bits) corresponding to the amplitude and phase of any one of the oscillation signals (LO signals) generated by the oscillation signal generator 11 (1). The signal bit calculator 13 can also calculate the bit value (4 bits) corresponding to the amplitude and phase of another oscillation signal (LO signal) generated by the oscillation signal generator 11 (1).

[0045] The signal bit calculator 13 calculates the bit value (4 bits) indicating the position of the data signal (Data signal) based on the synchronization signal (Sync signal) in the communication signal data generated by the communication signal data generator 11 (2).

[0046] The process of the signal bit calculator 13 calculating the bit value of any one oscillation signal, the bit value of another oscillation signal and the bit value in the communication signal data will be described below. Figure 2 and Figure 5 Specific instructions are given in .

[0047] The communication signal extractor 14 extracts a synchronization signal (Sync signal) based on the communication signal data generated by the communication signal data generator 11(2). The communication signal extractor 14 extracts a data signal (Sync signal) from the communication signal data calculated by the first data time interval calculator 15 using the time interval from the time point when the synchronization signal (Sync signal) is generated to the time point when the data signal (Data signal) is generated.

[0048] The first data time interval calculator 15 uses the bit value calculated by the signal bit calculator 13 to calculate the time interval between the time point when the sync signal is generated and the time point when the data signal is generated in the communication signal data.

[0049] The envelope signal generator 16 may generate an envelope signal based on the synchronization signal (Syn c signal) extracted from the communication signal extractor 14. The envelope signal generator 16 may generate an envelope signal based on the data signal (Data signal) extracted from the communication signal extractor 14.

[0050] The signal synthesizer 12 can generate an impulse signal by synthesizing the multiple oscillation signals (LO signals) generated by the oscillation signal generator 11(1), the multiple envelope signals generated by the envelope signal generator 16, and the oscillation bit data including bit values ​​corresponding to the phases and amplitudes of the multiple oscillation signals (LO signals). In this case, the signal synthesizer 12 can provide the impulse signal to the transmitter 17.

[0051] Hereinafter, envelope signals synthesized from a plurality of oscillation signals (LO signals) are respectively referred to as modulation envelope signals. The impulse signal can be formed by synthesizing a plurality of modulation envelope signals.

[0052] The transmitter 17 may transmit the impulse signal to the receiver 18 of the signal receiving device 20 .

[0053] The signal receiving device 20 includes a receiver 18, a second oscillation signal generator 19, a mixer 20', a modulation envelope signal extractor 21, an amplitude phase determiner 22, a modulation envelope signal synthesizer 23, a comparator 24, an edge detector 25, a second data time interval calculator 26 and a calculator 27.

[0054] The receiver 18 can receive the impulse signal sent by the signal sending device 10 .

[0055] The second oscillation signal generator 19 generates a plurality of oscillation signals using a synchronization start signal that is detected from the edge detector 25 based on an impulse signal and indicates the start time point of a synchronization signal (Sync signal). The plurality of oscillation signals generated by the second oscillation signal generator 19 are generated in synchronization with the plurality of oscillation signals generated by the first oscillation signal generator 11 (1). Any one of the oscillation signals generated by the second oscillation signal generator 19 has the same phase and amplitude as any one of the oscillation signals generated by the first oscillation signal generator 11 (1). Another oscillation signal generated by the second oscillation signal generator 19 has the same phase and amplitude as another oscillation signal generated by the first oscillation signal generator 11 (1).

[0056] The second oscillation signal generator 19 may apply a plurality of oscillation signals generated therein to the mixer 20 ′.

[0057] The mixer 20 ′ may mix or mix the plurality of oscillation signals and the impulse signal applied through the receiver 18 .

[0058] The modulation envelope signal extractor 21 can extract the modulation envelope signal whose amplitude and phase are modulated based on any one of the multiple oscillation signals and the impulse signal. The modulation envelope signal extractor 21 can extract the modulation envelope signal whose amplitude and phase are modulated based on another one of the multiple oscillation signals and the impulse signal.

[0059] The modulation envelope signal synthesizer 23 can synthesize the multiple modulation envelope signals extracted from the modulation envelope signal extractor 21 into a single synthesized modulation envelope signal. The synthesized modulation envelope signal can be formed by two modulation envelope signals whose phases and amplitudes are modulated by the multiple oscillation signals in the signal synthesizer 12, with a predetermined delay period between them.

[0060] In order to calculate the signal generation time points of the plurality of modulation envelope signals constituting the composite modulation envelope signal, the comparator 24 may modulate the composite modulation envelope signal into a rectangular waveform in a digital form.

[0061] The edge detector 25 may detect a time point at which a rising edge of a synthetic modulation envelope signal modulated by a rectangular waveform is generated.

[0062] The edge detector 25 determines the time point when the first rising edge is generated in the composite modulated envelope signal as the time point when the synchronization signal (Sync signal) is generated, and can generate a synchronization start signal. The edge detector 25 can determine the time point when the first polling edge is generated in the composite modulated envelope signal.

[0063] The edge detector 25 determines the time point at which the second rising edge is generated in the composite modulated envelope signal as the time point at which the data signal is generated, and can generate a data start signal. The edge detector 25 can determine the time point at which the second polling edge is generated in the composite modulated envelope signal.

[0064] The second data time interval calculator 26 uses the time point at which the synchronization signal (Sync signal) and the data signal (Data signal) are generated to calculate the interval, i.e., the time interval, between the time point at which the first modulation envelope signal is generated (the time point at which the first rising edge is generated) and the time point at which the second modulation envelope signal is generated (the time point at which the second rising edge is generated).

[0065] The amplitude phase determiner 22 determines the amplitude and phase of the first modulated envelope signal based on the time point at which the first rising edge and the first polling edge are detected by the edge detector 25. The amplitude phase determiner 22 determines the amplitude and phase of the second modulated envelope signal based on the time point at which the second rising edge and the second polling edge are detected by the edge detector 25.

[0066] The calculator 27 can extract the envelope signal generated by the envelope signal generator 16 from the first modulated envelope signal based on the amplitude and phase of the modulated envelope signal determined by the amplitude and phase determiner 22 .

[0067] The calculator 27 uses the amplitude and phase determined by the amplitude and phase determiner 22 and the time interval calculated by the second data time interval calculator 26 to extract the envelope signal generated by the envelope signal generator 16 from the second modulated envelope signal.

[0068] Figure 2 FIG3 is a diagram illustrating a signal transmission device according to an embodiment of the present invention. FIG4 is a diagram for explaining an MPPM modulation method and a QAM modulation method according to an embodiment of the present invention.

[0069] In the following, the actual Figure 1 Identical or duplicate instructions.

[0070] Reference together Figure 2 3 , the first oscillation signal generator 11(1) includes an eleventh oscillation signal generator 110 and a twelfth oscillation signal generator 111. The signal bit calculator 13 includes a data signal bit calculator 130 and an oscillation signal bit calculator 131. The communication signal extractor 14 includes a synchronization signal extractor 141 and a data signal extractor 142. The envelope signal generator 16 includes a first envelope signal generator 161 and a second envelope signal generator 162.

[0071] The eleventh oscillation signal generator 110 can generate a first oscillation signal (or, I-Phase signal) based on an externally applied input signal. The first oscillation signal (or, I-Phase signal) can be output as a sinusoidal curve having a predetermined period, but the present invention is not limited thereto. The first oscillation signal (or, I-Phase signal) can be a variety of curves that oscillate with a predetermined period.

[0072] The twelfth oscillation signal generator 111 can generate a second oscillation signal (or, Q Phase signal) based on an externally applied input signal. The second oscillation signal (or, Q Phase signal) can be output based on the first oscillation signal (or, I Phase signal) with a delay interval of 1 / 4 period. The second oscillation signal (or, Q Phase signal) can be output as a sinusoidal curve with a predetermined period, but the present invention is not limited to this. The second oscillation signal (or, Q Phase signal) can be a variety of curves that vibrate with a predetermined period.

[0073] Reference Figure 3B The first and second oscillation signals generated by the eleventh and twelfth oscillation signal generators 110 and 111 may have the same or different amplitudes and the same or different phases according to a quadrature modulation scheme (QAM) set by a user.

[0074] Hereinafter, in the present invention, according to Figure 3BAssuming that the first oscillation signal (or, I Phase signal) and the second oscillation signal (or, Q Phase signal) have the same phase according to a quadrature modulation scheme (QAM) configured by a user, the amplitude of the second oscillation signal (or, Q Phase signal) is generated based on a first modulation point (*, (1.0)) that is half the amplitude of the first oscillation signal (or, I Phase signal). The second oscillation signal generated by the quadrature modulation scheme (QAM) using the first modulation point (*, (1.0)) has the same phase as the first oscillation signal, has half the amplitude, and is output with a delay interval of 1 / 4 cycle.

[0075] The eleventh oscillation signal generator 110 may generate a first oscillation signal transmitted according to a first amplitude and a first phase, and a 4-bit value may be assigned to the first oscillation signal. The twelfth oscillation signal generator 111 may generate a second oscillation signal transmitted according to a second amplitude and a second phase, and a 4-bit value may be assigned to the second oscillation signal.

[0076] The data signal bit calculator 130 included in the signal bit calculator 13 can calculate a 4-bit value (hereinafter referred to as a third bit value) indicating the position of the data signal based on the synchronization signal (Sync signal) in the communication signal data.

[0077] The oscillation signal bit calculator 131 included in the signal bit calculator 13 can calculate a 4-bit value (hereinafter referred to as a first bit value) based on the first phase and first amplitude of the first oscillation signal generated by the eleventh oscillation signal generator 110. The oscillation signal bit calculator 131 included in the signal bit calculator 13 can calculate a 4-bit value (hereinafter referred to as a second bit value) based on the second phase and second amplitude of the second oscillation signal generated by the twelfth oscillation signal generator 111.

[0078] The synchronization signal extractor 141 included in the communication signal extractor 14 can extract the synchronization signal (Sync signal) from the communication signal data generated by the communication signal data generator 11 (2). The data signal extractor 142 included in the communication signal extractor 14 can extract the data signal (Data signal) using the first time interval from the time point when the synchronization signal (Sync signal) is generated to the time point when the data signal (Data signal) is generated, which is calculated by the first data time interval calculator 15.

[0079] The first data time interval calculator 15 uses the third bit value (4-bit value) calculated by the data signal bit calculator 130 to calculate a first time interval from the time point when the sync signal is generated to the time point when the data signal is generated.

[0080] The first envelope signal generator 161 included in the envelope signal generator 16 may generate a first envelope signal based on the synchronization signal (Sync signal) extracted from the synchronization signal extractor 141. The second envelope signal generator 162 included in the envelope signal generator 16 may generate a second envelope signal based on the data signal (Data signal) extracted from the data signal extractor 142.

[0081] The signal synthesizer 12 can generate an impulse signal by synthesizing the first oscillation signal generated in the eleventh oscillation signal generator (110), the second oscillation signal generated in the twelfth oscillation signal generator 111, the first envelope signal generated in the first envelope signal generator 161, the second envelope signal generated in the second envelope signal generator 162, and the oscillation bit data (third bit value) generated in the oscillation signal bit calculator 131.

[0082] Figure 4 FIG. 4 is a diagram showing waveforms of first and second oscillation signals according to an embodiment of the present invention.

[0083] Reference Figure 4 It is assumed that the first oscillation signal (or, I Phase signal) generated by the eleventh oscillation signal generator 110 according to an embodiment of the present invention is output in the form of a sin curve with a predetermined period.

[0084] The first oscillation signal generated by the eleventh oscillation signal generator 110 based on a quadrature modulation scheme (QAM) has a first phase and a first amplitude, oscillates according to a predetermined period, and is output from a first time point (t1). The second oscillation signal generated by the twelfth oscillation signal generator 111 based on a quadrature modulation scheme (QAM) has a second phase and a second amplitude, is delayed by a quarter period from the first oscillation signal, oscillates according to a predetermined period, and is output from a first time point (t1).

[0085] At this time, in the present invention, a quadrature modulation scheme (QAM) based on the first modulation point (*, (1.0)) is used according to user settings. Therefore, the amplitude of the second oscillation signal is half the amplitude of the first oscillation signal. In addition, the phase of the second oscillation signal is the same as the phase of the first oscillation signal.

[0086] Figure 5 FIG. 4 is a diagram showing waveforms of first and second envelope signals according to an embodiment of the present invention.

[0087] Reference Figure 5 According to an embodiment of the present invention, the first envelope signal generates a signal only within a specified period starting from the first time point (t1) when the first oscillation signal is generated.

[0088] Furthermore, the second envelope signal according to an embodiment of the present invention generates a signal only within a predetermined period starting from the second time point (t2) at which the data signal is generated in the communication signal data.

[0089] According to one embodiment of the present invention, the first envelope signal is generated based on the synchronization signal (Sync) included in the communication signal data, and the second envelope signal is generated based on the data signal (Data) included in the communication signal data. Therefore, the second envelope signal can be generated at a second time point (t2) after the first time point (t1) at which the first envelope signal is generated.

[0090] like Figures 2 to 5 As shown, the signal transmitting device 10 according to one embodiment of the present invention generates an envelope signal based on communication signal data according to the MPPM modulation method and can assign a specified bit value (4 bit values, the third bit value). According to the QAM modulation method, multiple oscillation signals (LO signals) are generated and can assign specified bit values ​​(4 bit values, the first bit value and the second bit value). The signal transmitting device 10 according to one embodiment of the present invention generates an impulse signal by synthesizing the envelope signal generated according to the MPPM modulation method and the multiple oscillation signals generated according to the QAM modulation method, and can send the impulse signal to the signal receiving device 20.

[0091] Figure 6 FIG. 1 is a diagram illustrating a signal receiving device according to an embodiment of the present invention. Figure 7 FIG. 1 is a diagram showing first to second modulation envelope signals according to an embodiment of the present invention.

[0092] In the following, the actual Figure 1 Identical or duplicate instructions.

[0093] The second oscillation signal generator 19 includes a twenty-first oscillation signal generator 190 and a twenty-second oscillation signal generator 191. The mixer 20' includes a first mixer 200 and a second mixer 201. The modulation envelope signal extractor 21 includes a first modulation envelope signal extractor 210 and a second modulation envelope signal extractor 211. The amplitude phase determiner 22 includes a first amplitude phase determiner 220 and a second amplitude phase determiner 221.

[0094] The twenty-first oscillation signal generator 190 is generated in the edge detector 25 and can generate a third oscillation signal based on a synchronization start signal indicating the start time point (t1) of the synchronization signal (Sync signal). The twenty-second oscillation signal generator 191 is generated in the edge detector 25 and can generate a fourth oscillation signal based on a synchronization start signal indicating the start time point (t1) of the synchronization signal (Sync signal).

[0095] At this time, the third oscillation signal generated by the twenty-first oscillation signal generator 190 and the fourth oscillation signal generated by the twenty-second oscillation signal generator 191 can be outputted with a delay interval of 1 / 4 period from each other based on the synchronization start signal.

[0096] At this time, the third oscillation signal generated by the twenty-first oscillation signal generator 190 can be synchronized with the first oscillation signal generated by the first oscillation signal generator 11 (1) based on the synchronization start signal. That is, the third oscillation signal is transmitted from the signal transmitting device 10 to the signal receiving device 20 with a predetermined delay period (t3-t1, see Figure 8 ), and may have the same phase as the first oscillation signal, i.e., the first phase, and the same amplitude as the first oscillation signal, i.e., the first amplitude. That is, the third oscillation signal generated in the twenty-first oscillation signal generator 190 may be generated from the third time point (t3).

[0097] The fourth oscillation signal generated by the twenty-second oscillation signal generator 191 can be synchronized with the second oscillation signal generated by the first oscillation signal generator 11(1) based on the synchronization start signal. That is, the fourth oscillation signal is transmitted from the signal transmitting device 10 to the signal receiving device 20 with a predetermined delay period (t3-t1) as a signal transmission period, and can have the same phase as the second oscillation signal, i.e., the second phase, and the same amplitude as the second oscillation signal, i.e., the second amplitude. In other words, the fourth oscillation signal generated by the twenty-second oscillation signal generator 191 can be generated from the third time point (t3).

[0098] The first mixer 200 may mix the impulse signal received by the receiver 18 and the third oscillation signal (or, I Phase Signal) received by the twenty-first oscillation signal generator 190 .

[0099] The second mixer 201 may mix the impulse signal received by the receiver 18 and the fourth oscillation signal (or, Q Phase Signal) received by the twenty-second oscillation signal generator 191 .

[0100] The first modulation envelope signal extractor 210 utilizes the impulse signal and the third oscillation signal mixed in the first mixer 200 to extract the first modulation envelope signal whose phase and amplitude are modulated according to the first oscillation signal.

[0101] The second modulation envelope signal extractor 211 utilizes the impulse signal and the fourth oscillation signal mixed in the second mixer 201 to extract the second modulation envelope signal whose phase and amplitude are modulated according to the second oscillation signal.

[0102] In this case, the first modulated envelope signal may have the form of a signal output within a predetermined period at a third time point (t3) after the predetermined delay period (t3-t1) has elapsed from the first time point (t1). The second modulated envelope signal may have the form of a signal output within a predetermined period at a fourth time point (t4) after the predetermined delay period (t3-t1) has elapsed from the second time point (t2).

[0103] The modulation envelope signal synthesizer 23 may synthesize the first modulation envelope signal and the second modulation envelope signal into a single signal. In this case, the synthesized modulation envelope signal synthesized by the modulation envelope signal synthesizer 23 may have the form of the first modulation envelope signal during a predetermined period from the third time point (t3) to the third "time point (t3"), and may have the form of the second modulation envelope signal during a predetermined period from the fourth time point (t4) to the fourth "time point (t4").

[0104] Comparator 24 may modulate the synthesized modulated envelope signal into a digital rectangular waveform. Specifically, comparator 24 may modulate the first modulated envelope signal into a rectangular waveform within a predetermined period from the third time point (t3) to the third "time point (t3") in the synthesized modulated envelope signal.

[0105] The comparator 24 can modulate the second modulation envelope signal into a rectangular waveform within a predetermined period from the fourth time point (t4) to the fourth "time point (t4") in the above-mentioned composite modulation envelope signal.

[0106] The edge detector 25 can detect the time point at which the first rising edge is generated in the composite modulation envelope signal modulated by the rectangular waveform, that is, the third time point (t3). The edge detector 25 can detect the time point at which the first polling edge is generated in the composite modulation envelope signal modulated by the rectangular waveform, that is, the third "time point" (t3").

[0107] The edge detector 25 can detect the fourth time point (t4), which is the time point at which the second rising edge is generated in the composite modulation envelope signal modulated by the rectangular waveform. The edge detector 25 can detect the fourth time point (t4), which is the time point at which the second polling edge is generated in the composite modulation envelope signal modulated by the rectangular waveform.

[0108] The edge detector 25 determines the third time point (t3) as the time point for generating a synchronization signal (Sync signal) and can generate a synchronization start signal. The edge detector 25 determines the fourth time point (t4) as the time point for generating a data signal (Datasignal) and can generate a data start signal.

[0109] The edge detector 25 may apply the third time point (t3) at which the generation of the first modulation envelope signal starts and the third “time point” (t3) at which the generation of the first modulation envelope signal stops to the first amplitude and phase determiner 220. The edge detector 25 may apply the fourth time point (t4) at which the generation of the second modulation envelope signal starts and the fourth “time point” (t4) at which the generation of the second modulation envelope signal stops to the second amplitude and phase determiner 221.

[0110] The second data time interval calculator 26 uses the third time point (t3) at which the synchronization start signal is generated and the fourth time point (t4) at which the data start signal is generated to detect the interval (t4-t3) between the time point at which the first modulation envelope signal is generated and the time point at which the second modulation envelope signal is generated.

[0111] The second data time interval calculator 26 may apply the interval between the time point at which the first modulation envelope signal is generated and the time point at which the second modulation envelope signal is generated, ie, the time interval (t4-t3), to the calculator 27.

[0112] The first amplitude phase determiner 220 uses the first modulation envelope signal extracted from the first modulation envelope signal extractor 210 and the third time point (t3) and the third "time point" (t3") detected by the edge detector 25 to detect the third phase and the third amplitude of the first modulation envelope signal modulated according to the first oscillation signal (or, the third oscillation signal).

[0113] Specifically, the first amplitude phase determiner 220 may determine the third phase and the third amplitude of the first modulated envelope signal modulated by the first oscillation signal (or the third oscillation signal) at a third ' time point (t3') which is midway between the third time point (t3) and the third ' time point (t3").

[0114] The first amplitude phase determiner 220 may provide the third phase and the third amplitude of the first modulated envelope signal modulated according to the first oscillation signal (or the third oscillation signal) determined at the third 'time point ( t3 ') to the calculator 27 .

[0115] The second amplitude phase determiner 221 uses the second modulation envelope signal extracted from the second modulation envelope signal extractor 211 and the fourth time point (t4) and the fourth "time point (t4") detected by the edge detector 25 to detect the fourth phase and the fourth amplitude of the second modulation envelope signal modulated according to the second oscillation signal (or, the fourth oscillation signal).

[0116] Specifically, the second amplitude and phase determiner 221 may determine the fourth phase and fourth amplitude of the second modulated envelope signal modulated by the second oscillation signal (or, the fourth oscillation signal) at the fourth' time point (t4') which is the middle point between the fourth time point (t4) and the fourth' time point (t4').

[0117] The calculator 27 may generate the first envelope signal generated by the first envelope signal generator 161 using the third phase and the third amplitude determined by the first amplitude phase determiner 220 and the first modulation envelope signal extracted from the first modulation envelope signal extractor 210 .

[0118] Specifically, the calculator 27 can demodulate the first phase and the first amplitude of the first envelope signal based on the third phase and the third amplitude in the first modulated envelope signal, thereby extracting the first envelope signal.

[0119] The calculator 27 can generate the second envelope signal generated in the second envelope signal generator 162 using the fourth phase and the fourth amplitude determined by the second amplitude phase determiner 221, the second modulation envelope signal extracted from the second modulation envelope signal extractor 211, and the time interval calculated by the second data time interval calculator 26.

[0120] Specifically, the calculator 27 can demodulate the second phase and the second amplitude of the second envelope signal based on the fourth phase and the fourth amplitude in the second modulated envelope signal, and can extract the second envelope signal using the time interval.

[0121] Figure 8 A diagram illustrating a transmission signal output from a signal transmitting apparatus and a reception signal received by a signal receiving apparatus according to an embodiment of the present invention.

[0122] Reference Figure 8 In the signal sending device 10 according to one embodiment of the present invention, the communication signal data including the second to second oscillation signals generated by the orthogonal modulation method (QAM) and having a 1 / 4 period with each other and the synchronization signal and data signal generated by the MPPM method and having a 1 period of 200MHz are mixed to generate an impulse signal, which can be sent to the signal receiving device 20.

[0123] In the signal receiving device 20 according to an embodiment of the present invention, the signal receiving device 20 can be synchronized with the signal transmitting device 10 based on the impulse signal transmitted by the signal transmitting device 10 .

[0124] In the signal receiving device 20, the third to fourth oscillation signals are generated by itself, each having a delay period of the specified signal transmission period (t3-t1) compared with the first to second oscillation signals. In the impulse signal received based on the above-mentioned third to fourth oscillation signals, the multiple envelope signals transmitted by the signal transmitting device 10 can be demodulated.

[0125] Furthermore, based on the plurality of envelope signals demodulated in the signal receiving device 20 , communication signal data including a synchronization signal having a period of 200 MHz and a data signal can be extracted.

[0126] The drawings and descriptions referred to so far are merely illustrative of the present invention and are used solely for the purpose of illustrating the present invention. They are not intended to limit the meaning or scope of the present invention as set forth in the claims. Therefore, anyone skilled in the art will readily appreciate that various variations and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be determined based on the technical principles of the appended claims.

Claims

1. An impulse wireless communication system, characterized in that: include: an oscillation signal generator for generating a plurality of oscillation signals having a delay interval therebetween and having the same or different phases and the same or different amplitudes; An envelope signal generator extracts a synchronization signal and a data signal constituting communication signal data, and generates an envelope signal for the synchronization signal and an envelope signal for the data signal; a signal synthesizer, synthesizing the plurality of oscillation signals and the plurality of envelope signals to generate an impulse signal; an envelope signal extractor, synchronized with the oscillation signal generator based on the synchronization signal, and extracting a plurality of modulated envelope signals from the impulse signal; an amplitude phase determiner, configured to determine the phase and the amplitude in the plurality of modulated envelope signals based on the plurality of oscillation signals; as well as The calculator extracts the envelope signal from the plurality of modulated envelope signals based on the phase and the amplitude.

2. The impulse wireless communication system according to claim 1, wherein: The oscillation signal generator comprises: a first oscillation signal generator that generates a first oscillation signal that is transmitted according to a first amplitude and a first phase corresponding to a first bit value; and The second oscillation signal generator generates a second oscillation signal to be transmitted according to a second amplitude and a second phase corresponding to a second bit value and being the same as or different from the first amplitude and the first phase.

3. The impulse wireless communication system according to claim 2, wherein: The impulse wireless communication system further includes: a data signal bit calculator for calculating a third bit value representing a position of the data signal in the communication signal data based on the synchronization signal; and The first data time interval calculator calculates a first time interval between a time point at which the synchronization signal is generated and a time point at which the data signal is generated based on the third bit value.

4. The impulse wireless communication system according to claim 3, wherein: The impulse wireless communication system further includes: a synchronization signal extractor, extracting the synchronization signal from the communication signal data; a data signal extractor, utilizing the first time interval to extract the data signal delayed by the first time interval from the communication signal data based on the synchronization signal; a first envelope signal generator, generating a first envelope signal based on the synchronization signal; and The second envelope signal generator generates a second envelope signal based on the data signal.

5. The impulse wireless communication system according to claim 4, wherein: The impulse wireless communication system further includes an oscillation signal bit calculator configured to calculate oscillation bit data including the first bit value and the second bit value.

6. The impulse wireless communication system according to claim 4, wherein: The impulse wireless communication system further includes: a third oscillation signal generator that generates, based on the synchronization signal, a third oscillation signal having the same phase as the first phase of the first oscillation signal and the same amplitude as the first amplitude; and The fourth oscillation signal generator generates a fourth oscillation signal having the same phase as the second phase of the second oscillation signal and the same amplitude as the second amplitude based on the synchronization signal.

7. The impulse wireless communication system according to claim 6, wherein: The impulse wireless communication system further includes: a first modulation envelope signal extractor, configured to mix the third oscillation signal and the impulse signal to extract a first modulation envelope signal corresponding to the first envelope signal; and The second modulation envelope signal extractor mixes the fourth oscillation signal and the impulse signal to extract a second modulation envelope signal corresponding to the second envelope signal.

8. The impulse wireless communication system according to claim 7, wherein: The impulse wireless communication system further includes: a modulation envelope signal synthesizer, synthesizing the first modulation envelope signal and the second modulation envelope signal to generate a first synthesized modulation envelope signal; a comparator for changing the first synthesized modulated envelope signal corresponding to an analog signal into a second synthesized modulated envelope signal in the form of a rectangular waveform; and An edge detector detects, in the second composite modulated envelope signal, a first edge time point of a rising waveform of the first modulated envelope signal and a first polling time point of a polling, and a second edge time point of a rising waveform of the second modulated envelope signal and a second polling time point of a polling.

9. The impulse wireless communication system according to claim 8, wherein: The impulse wireless communication system further includes: a first amplitude phase determiner, configured to determine the phase and the amplitude of the first modulated envelope signal corresponding to the first bit value based on the first edge time point and the first polling time point; and The second amplitude phase determiner determines the phase and the amplitude of the second modulated envelope signal corresponding to the second bit value based on the second edge time point and the second polling time point.

10. The impulse wireless communication system according to claim 9, wherein: The impulse wireless communication system further includes a second data time interval calculator, which calculates a second time interval between a time point at which the first modulation envelope signal is generated and a time point at which the second modulation envelope signal is generated based on the first edge time point and the second edge time point. The first time interval and the second time interval are the same.

11. The impulse wireless communication system according to claim 10, wherein: The calculator calculates the first envelope signal in the first modulated envelope signal based on the phase and the amplitude of the first modulated envelope signal, and calculates the second envelope signal in the second modulated envelope signal based on the second time interval, the phase and the amplitude of the second modulated envelope signal.

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