JP2007228499A - Signal processor device and method for signal processing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transmit and receive efficiently data signals via radio in the housing of a device. <P>SOLUTION: An injection synchronous oscillation part 55 is synchronized with injection signals transmitted via a cable from other signal processing parts or oscillators. Further, it modulates the data signals transmitted to either of the two or more signal processing parts via radio, or oscillates so that a carrier signal for demodulating the data signals transmitted via radio from either of the two or more signal processing parts may be generated. A communication part 53 modulates the data signals transmitted to either of the two or more signal processing parts via radio by using a carrier signal, or demodulates the data signals transmitted via radio from either of the two or more signal processing parts. This invention is applicable to a signal processing device which stores two or more signal processing parts in one cases, such as an image signal processor or a personal computer, for example. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a signal processing apparatus and method, and more particularly, to a signal processing apparatus and method that can perform wireless communication within a casing.

  In conventional wireless communication, it is necessary to perform two types of synchronization, namely carrier synchronization and clock synchronization, at the receiver. Since the accuracy of synchronization between the transmitter and the receiver closely affects the communication quality, a synchronization method that operates accurately and at high speed is desired.

  Carrier synchronization is zeroing the frequency and phase deviation of the transmitter and receiver carrier signals. There are two detection methods for carrier synchronization, a synchronous detection method and an asynchronous detection method.

  The synchronous detection method is a method typified by a Costas loop circuit, and is a method that is more power efficient than the asynchronous detection method, but the circuit scale becomes large in the synchronous detection method. On the other hand, the asynchronous detection method can be realized with a simple configuration and the circuit scale can be reduced, but the power efficiency is lower than that of the synchronous detection method.

  Clock synchronization refers to performing synchronization by extracting the timing of the original symbol included in the symbol data and reproducing the original symbol to the transmission source data.

  Usually, when performing carrier detection and clock synchronization of the synchronous detection method, a method is adopted in which a pilot signal which is a known signal is inserted into a signal to be transmitted and a frequency deviation is estimated based on the pilot signal.

  However, when obtaining the frequency deviation with high accuracy, it is necessary to increase the number of bits of the pilot signal, and accordingly, there is a problem that the time required for synchronization becomes longer. Furthermore, by increasing the number of bits, communication transmission efficiency is lowered by adding data irrelevant to data to be actually transmitted, so-called overhead. There is also a problem that communication traffic is crowded due to overhead. As broadband signals are transmitted at high speed, it is required to reduce the amount of signal overhead.

  On the other hand, AFC (Auto Frequency Controller) and PLL (Phase Locked Loop) that estimate the frequency deviation of the received signal by obtaining frequency deviation information and bit error information from the signal demodulation circuit that demodulates the received signal and output the correction There is a method of establishing synchronization between transmission and reception using a circuit so that signals can be extracted with high accuracy (see, for example, Patent Document 1).

JP-A-10-322171

  In the method described in Patent Document 1, it is necessary to exchange signals every time communication is performed, and thus reduction in efficiency, power consumption, increase in communication traffic, and the like are not solved.

  By the way, a wireless communication method suitable for this is not proposed for inter-board communication performed within the housing of the apparatus or for inter-device communication on the same board.

  The present invention has been made in view of such a situation, and enables a data signal to be efficiently transmitted and received through a radio in the housing of the apparatus.

  A signal processing device according to an aspect of the present invention includes a plurality of signal processing units stored in one housing, each of which processes a data signal that is a signal of predetermined data. The signal processing apparatus is configured to be synchronized with an injection signal transmitted from another signal processing unit or an oscillator provided in a predetermined signal processing unit among the plurality of signal processing units via a wire. In order to modulate the data signal transmitted via radio to any of the plurality of signal processing units, or to demodulate the data signal transmitted via radio from any of the plurality of signal processing units Injection-locked oscillation means that oscillates so as to generate a carrier signal, and the data that is provided in the signal processing unit and that is wirelessly transmitted to one of the plurality of signal processing units. Or modulates the items, and a communication means for demodulating the data signal transmitted via the wireless from any of the plurality of signal processing units.

  The injection locking oscillation means synchronizes the phase of the injection signal in the oscillator or the other signal processing unit that transmits the injection signal with the phase of the received injection signal, and synchronizes the phase. It can oscillate to generate the carrier signal in synchronization with the injection signal.

  In the signal processing device, information specifying each of the plurality of signal processing units includes a phase of the carrier signal and a phase of the data signal transmitted from each of the plurality of signal processing units via radio. Storage means for associating and storing the phase difference between the carrier signal and the phase of the carrier signal corresponding to the information for identifying each of the plurality of signal processing units and the plurality of signal processing units transmitted via radio Synchronizing means for synchronizing the phase of the carrier signal with the phase of the data signal transmitted via radio from the other signal processing unit based on the phase difference from the phase of the data signal coming be able to.

  The signal processing device further includes a power source that supplies power to the plurality of signal processing units via a power line, and the injection signal is transmitted to the other signal processing unit or the oscillator via a wire that is the power line. Sent from

  According to one aspect of the present invention, there is provided a signal processing method including a plurality of signal processing units stored in one housing, each of which processes a data signal that is a signal of predetermined data. In the signal processing method of the signal processing apparatus, the predetermined signal processing unit of the plurality of signal processing units is synchronized with an injection signal transmitted from another signal processing unit or an oscillator via a wire. In order to modulate the data signal transmitted via radio to any of the plurality of signal processing units, or to demodulate the data signal transmitted via radio from any of the plurality of signal processing units The carrier signal oscillates to generate a carrier signal, and the carrier signal modulates the data signal transmitted to any one of the plurality of signal processing units via radio, or from any of the plurality of signal processing units. Demodulating the data signal transmitted via the line.

  In one aspect of the present invention, a predetermined signal processing unit of the plurality of signal processing units is provided in synchronization with an injection signal transmitted from another signal processing unit or an oscillator via a wire. In order to modulate the data signal transmitted via radio to any of the plurality of signal processing units, or to demodulate the data signal transmitted via radio from any of the plurality of signal processing units The data signal to be transmitted via radio to one of the plurality of signal processing units is modulated by the carrier signal provided in the signal processing unit. Alternatively, the data signal transmitted from any of the plurality of signal processing units via radio is demodulated.

  As described above, according to one aspect of the present invention, a data signal can be signal-processed. Further, according to one aspect of the present invention, it is possible to efficiently transmit and receive data signals via radio within the housing of the apparatus.

  Embodiments of the present invention will be described below. Correspondences between the constituent elements of the present invention and the embodiments described in the specification or the drawings are exemplified as follows. This description is intended to confirm that the embodiments supporting the present invention are described in the specification or the drawings. Therefore, even if there is an embodiment which is described in the specification or the drawings but is not described here as an embodiment corresponding to the constituent elements of the present invention, that is not the case. It does not mean that the form does not correspond to the constituent requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

  A signal processing device according to one aspect of the present invention is a plurality of signal processing units (for example, LSI 31-1 to LSI 31-3 in FIG. 1) stored in one housing, and is a signal of predetermined data. A signal processing device including a plurality of signal processing units that respectively process data signals, and another signal processing unit or an oscillator (provided in a predetermined signal processing unit among the plurality of signal processing units) For example, in synchronization with the injection signal transmitted from the oscillator 261) of FIG. 18 via a wire, the data signal to be transmitted wirelessly to any one of the plurality of signal processing units is modulated, or the plurality Injection-locked oscillation means (for example, injection-locked oscillation unit 55 in FIG. 2) that oscillates so as to generate a carrier signal for demodulating the data signal transmitted from one of the signal processing units via radio. The above The data signal to be transmitted to any one of the plurality of signal processing units is modulated by the carrier signal provided in the signal processing unit, or the radio signal is transmitted from any of the plurality of signal processing units. Communication means (for example, the communication unit 53 in FIG. 2) for demodulating the data signal transmitted through the network.

  The injection locking oscillation means synchronizes the phase of the injection signal in the oscillator or the other signal processing unit that transmits the injection signal with the phase of the received injection signal, and synchronizes the phase. It can oscillate to generate the carrier signal in synchronization with the injection signal.

  In the signal processing device, information specifying each of the plurality of signal processing units includes a phase of the carrier signal and a phase of the data signal transmitted from each of the plurality of signal processing units via radio. Storage means (for example, the classification unit 181 in FIG. 8) that stores the phase difference in association with each other, and the phase of the carrier signal and the plurality of signal processings corresponding to information specifying each of the plurality of signal processing units The carrier signal to the phase of the data signal transmitted from the other signal processing unit via radio based on the phase difference from the phase of the data signal transmitted from each of the units via radio Synchronization means (for example, the phase synchronization unit 182 in FIG. 8) for synchronizing the phases of the two can be further provided.

  The signal processing device further includes a power source (for example, the power source 241 in FIG. 17) that supplies power to the plurality of signal processing units via a power line (for example, the power line 242 in FIG. 17), and the injection signal is It is transmitted from the other signal processing unit or the oscillator via a wire that is the power line.

  According to one aspect of the present invention, there is provided a signal processing method including a plurality of signal processing units stored in one housing, each of which processes a data signal that is a signal of predetermined data. In the signal processing method of the signal processing apparatus, the predetermined signal processing unit of the plurality of signal processing units is synchronized with an injection signal transmitted from another signal processing unit or an oscillator via a wire. In order to modulate the data signal transmitted via radio to any of the plurality of signal processing units, or to demodulate the data signal transmitted via radio from any of the plurality of signal processing units Or the carrier signal to modulate the data signal to be transmitted wirelessly to any of the plurality of signal processing units (for example, step S17 in FIG. 12), Demodulating the data signal from one of the serial plurality of signal processing units transmitted via a wireless (e.g., step S14 in FIG. 12).

  FIG. 1 is a diagram illustrating an example of a signal processing apparatus according to an embodiment of the present invention.

  The signal processing apparatus in FIG. 1 is, for example, an image signal processing apparatus or a personal computer. A unit 11 and a unit 12 are arranged inside the housing 1 of the signal processing apparatus of FIG. For example, each of the unit 11 and the unit 12 is configured as one substrate. The unit 11 or the unit 12 is connected through a connection line 13 that is a wire. In the unit 11, an LSI (Large Scale Integration) 31-1 and an LSI 31-2 which are signal processing units are arranged. In the unit 12, an LSI 31-3 as a signal processing unit is arranged.

  The housing 1 includes at least one oscillator that enables stable and low phase noise oscillation. Hereinafter, an oscillator that enables stable oscillation with low phase noise is referred to as an injection signal oscillator.

  Each of the units 11 and 12 includes an injection locked oscillator. For example, each of the LSIs 31-1 to 31-3 includes an injection locking oscillator.

  Further, any one of the unit 11 and the unit 12 or any one of the injection-locked oscillators provided in any of the LSIs 31-1 to 31-3 can be an injection signal oscillator.

  The injection signal oscillator and each of the injection locking oscillators are connected via a wire. That is, the injection signal transmitted from the injection signal oscillator to each of the injection locking oscillators is transmitted via a wire. Further, the main clock supplied to the units 11 and 12 and the LSIs 31-1 to 31-3 is also transmitted via a wire. In other words, the units 11 and 12 and the LSIs 31-1 to 31-3 are connected by wires that transmit the injection signal and the main clock.

  The main clock is a signal serving as a reference for signal processing in each of the unit 11 or unit 12, or the LSI 31-1 to the LSI 31-3.

  With such a configuration, it is possible to synchronize each frequency of the injection locking oscillator with the oscillation frequency of the injection signal oscillator that enables at least one stable and low phase noise oscillation.

  The unit 11 or the unit 12 may be provided with a storage medium such as a microcomputer, a memory or a hard disk, or a mechanical part.

  The LSI 31-1 to the LSI 31-3 each process a data signal that is a predetermined data signal.

  Each of the LSIs 31-1 to 31-3 has a communication function, and transmits or receives data signals wirelessly. The carrier frequency of the radio communication of the LSI 31-1 to the LSI 31-3 is selected to be the oscillation frequency of the injection signal oscillator, that is, n times m times the frequency of the injection signal. Here, m is an integer and n is an integer.

  Note that the main clock can be generated from the carrier by selecting the carrier frequency to be k times j times the frequency of the main clock. Here, j is an integer and k is an integer. In this case, since it is not necessary to transmit the main clock between the unit 11 or the unit 12, the number of wires connecting the unit 11 and the unit 12 can be reduced by at least one, and the wiring can be simplified. it can.

  Further, when the LSIs 31-1 and 31-2 are arranged in the unit 11 that is the same substrate, the LSI 31-1 and the LSI 31-2 may communicate with each other via a wire.

  Hereinafter, LSI 31-1 to LSI 31-3 are simply referred to as LSI 31 when it is not necessary to distinguish between them.

  FIG. 2 is a block diagram illustrating an example of the configuration of the LSI 31.

  The LSI 31 includes a wired input / output interface 51, a signal processing unit 52, a communication unit 53, an antenna 54, and an injection locking oscillation unit 55. Hereinafter, the wired input / output interface 51 is referred to as a wired input / output I / F (Interface) 51.

  The wired input / output I / F 51 inputs input data transmitted via a wired line, or outputs output data via a wired line. That is, the wired input / output I / F 51 receives input data transmitted via a wired line, or transmits output data via a wired line.

  Note that the wire is not limited to an electric wire that transmits a so-called electric signal, but includes an optical fiber or the like.

  The wired input / output I / F 51 is configured as a serial interface, for example. The wired input / output I / F 51 supplies various data signals received via the wire to the signal processing unit 52 and transmits various data signals supplied from the signal processing unit 52 via the wire. Further, the wired input / output I / F 51 supplies the control signal received via the wired line to the signal processing unit 52.

  The signal processing unit 52 performs arbitrary signal processing on the data signal supplied from the wired input / output I / F 51 or the communication unit 53. The signal processing unit 52 supplies the data signal subjected to the signal processing to the wired input / output I / F 51 or the communication unit 53. Further, the signal processing unit 52 performs arbitrary processing in accordance with the control signal supplied from the wired input / output I / F 51, and supplies the data or control signal obtained as a result to the synchronization unit 73.

  The signal processing unit 52 performs digital filter processing and signal replacement processing on the input data signal. For example, when the data signal to be processed is a signal of image data or audio data, the signal processing unit 52 performs DRC (Digital Reality Creation) (trademark) processing, which is processing for generating a higher resolution image, decoding or encoding. Etc.

  The communication unit 53 communicates with any of the LSIs 31 in the housing 1 via the antenna 54 via the radio. The communication unit 53 includes a modulation unit 71, a demodulation unit 72, and a synchronization unit 73. Modulator 71 modulates the data signal transmitted via antenna 54, and demodulator 72 and synchronizer 73 demodulate the data signal received by antenna 54.

  The modulation unit 71 is a carrier signal supplied from the injection locking oscillation unit 55, and is a data signal supplied from the signal processing unit 52, and modulates a data signal transmitted to the other LSI 31 via radio. The modulation unit 71 modulates data with a carrier signal by a predetermined method such as an ASK (Amplitude Shift Keying) method or a PSK (Phase Shift Keying) method.

  The modulation unit 71 supplies the modulated data signal to the antenna 54.

  The demodulator 72 receives the data signal transmitted from the other LSI 31 via radio at the antenna 54, and thereby the data signal, which is an electric signal supplied from the antenna 54, is supplied from the injection locking oscillator 55. Then, the synchronization unit 73 demodulates with the carrier signal whose phase is synchronized. The demodulator 72 demodulates the data signal with the carrier signal by a demodulation method corresponding to the modulation method of the data signal in the other LSI 31 that transmits the data signal, such as the ASK method or the PSK method.

  The demodulator 72 supplies the demodulated data signal to the signal processor 52. Further, the demodulator 72 supplies a data signal, which is an electrical signal obtained by receiving a data signal transmitted from the other LSI 31 via radio from the antenna 54, to the synchronizer 73.

  The synchronization unit 73 synchronizes the phase of the carrier signal supplied from the injection locking oscillation unit 55 with the phase of the data signal supplied from the demodulation unit 72. The synchronization unit 73 supplies the carrier signal whose phase is synchronized to the demodulation unit 72.

  The antenna 54 radiates the modulated data signal supplied from the modulation unit 71 as a radio wave. The antenna 54 receives a data signal that is a radio wave transmitted from another LSI 31. The antenna 54 supplies a data signal, which is an electrical signal obtained by receiving a data signal, which is a radio wave, to the demodulator 72.

  The injection locking oscillation unit 55 modulates a data signal to be transmitted to another LSI 31 via radio in synchronization with an injection signal transmitted from another LSI 31 or an injection signal oscillator via a wire, or another LSI 31. Oscillates so as to generate a carrier signal for demodulating the data signal transmitted from the radio.

  The injection locking oscillator 55 synchronizes the phase of the injection signal in the injection signal oscillator or other LSI 31 that transmits the injection signal with the phase of the received injection signal, and synchronizes with the injection signal whose phase is synchronized. Oscillates to generate a carrier signal.

  Further, the wired input / output I / F 51, the signal processing unit 52, and the communication unit 53 operate in synchronization with the main clock.

  FIG. 3 is a block diagram illustrating a configuration example of the injection locking oscillation unit 55.

  The injection locking oscillation unit 55 includes an injection locking oscillator 91 and an n / m multiplication circuit 92.

  The injection locking oscillator 91 oscillates in synchronization with an injection signal transmitted from another LSI 31 or an injection signal oscillator via a wire.

  Further, the injection locking oscillator 91 synchronizes the phase of the injection signal in the injection signal oscillator or other LSI 31 that transmits the injection signal with the phase of the received injection signal by the control voltage signal input from the outside, Oscillates in synchronization with the injection signal whose phase is synchronized. That is, the injection locking oscillator 91 is a signal having a frequency synchronized with the frequency of the injection signal, and a signal having a phase synchronized with the phase of the injection signal in the injection signal oscillator or other LSI 31 that transmits the injection signal is n /. m is supplied to the multiplier circuit 92.

  Here, with reference to FIG. 4, the phase difference generated between the phase of the injection signal in the oscillator or other LSI that transmits the injection signal and the phase of the received injection signal will be described.

  An LSI 31-1 and an LSI 31-2 are arranged on the unit 11 illustrated in FIG. The LSI 31-1 includes a communication unit 53-1, and the LSI 31-2 includes a communication unit 53-2 and an oscillator 121 that is an injection signal oscillator.

  The oscillator 121 oscillates stably and with low phase noise, and transmits the output as an injection signal to the communication unit 53-1 and the communication unit 53-2 via a wire. That is, the oscillation frequency of the injection locking oscillation unit 55 included in the communication unit 53-1 and the communication unit 53-2 is synchronized with the oscillation frequency of the oscillator 121.

  However, since the length of the wire that is the transmission path of the injection signal from the oscillator 121 to the communication unit 53-1 or the communication unit 53-2, that is, the physical distance is different, as shown in FIG. A phase difference occurs between the phase of the signal and the phase of the injection signal received by the communication unit 53-1 or the communication unit 53-2.

  At this time, since the injection-locked oscillator 91 is configured to change the phase of oscillation according to the voltage of the control voltage signal, the injection-locked oscillator 91 of the communication unit 53-1 or the communication unit 53-2 has the control voltage. By adjusting the signal, the phase of the injection signal in the oscillator 121 and the phase of the oscillation of the injection-locked oscillator 91, that is, the phase of the signal output from the injection-locked oscillator 91 are synchronized, and the injection signal in the oscillator 121 is synchronized. Can oscillate in synchronization with the frequency and phase.

  The control voltage signal is a signal given from the outside of the LSI 31, and is applied to, for example, a varactor diode that constitutes the injection-locked oscillator 91 and changes the oscillation phase of the injection-locked oscillator 91 by changing its capacitance. The control voltage signal may be adjusted by a human by a variable resistor or the like according to the phase difference. Further, for example, the control voltage signal may be changed for each predetermined voltage such as 0.1 mV, such as 5.0 mV, 5.1 mV, 5.2 mV,.

  The n / m multiplier circuit 92 generates a signal having a frequency obtained by multiplying the frequency of the signal by n / m (m and n are integers) from the signal output from the injection locking oscillator 91. The n / m multiplier circuit 92 outputs the generated signal as a carrier signal.

  That is, the injection locking oscillation unit 55 oscillates so as to generate a carrier signal having a frequency that is n times m times the frequency of an injection signal transmitted from another LSI 31 or an injection signal oscillator via a wire.

  With such a configuration, carrier signals whose frequencies and phases are synchronized are generated in the injection locking oscillation units 55 of the LSIs 31-1 to 31-3, respectively.

  Next, the configuration of each of the modulation unit 71, the demodulation unit 72, and the synchronization unit 73 of the communication unit 53 will be described with reference to FIGS.

  FIG. 6 is a block diagram illustrating a configuration example of the modulation unit 71 in FIG. The modulation unit 71 shown in FIG. 6 modulates the data signal using the ASK modulation method.

  The modulation unit 71 is configured to include a multiplier 141. The multiplier 141 modulates the data signal by multiplying the carrier signal supplied from the injection locking oscillation unit 55 and the data signal supplied from the signal processing unit 52.

  Note that the data signal supplied from the signal processing unit 52 may be channel-coded before being supplied to the multiplier 141.

  Further, the modulation method is not limited to ASK modulation, and for example, FSK modulation or PSK modulation may be employed.

  FIG. 7 is a block diagram illustrating a configuration example of the demodulation unit 72 in FIG. The demodulator 72 shown in FIG. 7 demodulates the data signal modulated by the ASK modulation method.

  The demodulator 72 includes a multiplier 161 and a signal reproduction circuit 162.

  The multiplier 161 multiplies the data signal supplied from the antenna 54 by the synchronization carrier signal supplied from the synchronization unit 73 and synchronized with the phase of the data signal supplied from the antenna 54. Demodulate the signal. That is, the multiplier 161 demodulates the data signal by the synchronous detection method. The multiplier 161 supplies the demodulated data signal obtained as a result of the multiplication to the signal reproduction circuit 162.

  The multiplier 161 supplies the demodulated data signal to the synchronization unit 73.

  The signal reproduction circuit 162 is constituted by, for example, a D flip-flop, and reproduces a data signal synchronized with the main clock from the data signal demodulated by the multiplier 161 with reference to the main clock. The signal reproduction circuit 162 supplies the reproduced data signal to the signal processing unit 52.

  When the data signal supplied from the signal processing unit 52 is channel-coded before being input to the multiplier 141, the signal regeneration circuit 162 uses a demodulation method corresponding to the channel coding, The data signal may be demodulated.

  Also, the demodulation method is not limited to ASK demodulation, and when the received data signal is modulated by a modulation method such as FSK modulation or PSK modulation, for example, FSK demodulation or PSK demodulation corresponding to the modulation method Thus, the data signal may be demodulated.

  FIG. 8 is a block diagram illustrating a configuration example of the synchronization unit 73 of FIG.

  The synchronization unit 73 includes a classification unit 181 and a phase synchronization unit 182.

  The classification unit 181 uses the information specifying each of the plurality of LSIs 31 supplied from the signal processing unit 52 as the information indicating the phase of the carrier signal supplied from the injection locking oscillation unit 55 and each of the plurality of LSIs 31 supplied from the demodulation unit 72. Stores the phase difference with the phase of the data signal transmitted via the radio in association with each other.

  More specifically, as shown in the configuration example of the classification unit 181 in FIG. 9, the classification unit 181 includes a phase delay amount table 201. Information specifying each of the plurality of LSIs 31 supplied from the signal processing unit 52 includes the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the plurality of LSIs 31 supplied from the demodulation unit 72 via radio. The phase difference from the phase of the transmitted data signal is stored in association with the phase delay amount table 201.

  Here, referring to FIG. 10 and FIG. 11, the waveform of the carrier signal supplied from injection locking oscillation unit 55 and the data signal transmitted from each of the plurality of LSIs 31 supplied from demodulation unit 72 via wireless communication The relationship between the waveform and the phase delay amount table 201 will be described.

  FIG. 10 shows a carrier signal waveform in a predetermined LSI 31 (not shown) provided in the housing 1 of FIG. 1 and data signals transmitted from the LSI 31-1 to LSI 31-3 via radio. FIG. 6 is a diagram showing a waveform of a demodulated data signal that is a received and demodulated data signal in a predetermined LSI 31 that has received the signal, and is a carrier signal from the injection locking oscillation unit 55 as it is.

  In FIG. 10, the waveform of the carrier signal in the predetermined LSI 31 may be a waveform obtained by dividing the carrier signal in the predetermined LSI 31, a preamble waveform for phase synchronization, or a waveform for phase synchronization.

  In FIG. 10, a data signal transmitted from any of the LSIs 31-1 to 31-3 by radio is represented as an ideal square wave, but from any of the LSIs 31-1 to 31-3. The waveform of the data signal transmitted via radio is actually broken.

  In FIG. 10, a carrier signal in a predetermined LSI 31 and a data signal transmitted from the LSI 31-1 via radio waves have the same frequency but different phases. Specifically, the data signal transmitted from the LSI 31-1 via radio is a straight line through which a direct wave between the LSI 31-1 and the predetermined LSI 31 is propagated with respect to the carrier signal in the predetermined LSI 31. Or a path through which reflected waves that change depending on the positional relationship between the LSI 31-1 and the predetermined LSI 31 and the wall surface of the housing 1 and the arrangement of a plurality of units in the housing 1 are propagated to the predetermined LSI 31. There is a delay time of aaa [μsec] determined by the distance of the path through which stronger radio waves are propagated.

  Similarly, the carrier signal in the predetermined LSI 31 and the data signal transmitted from the LSI 31-2 via wireless have the same frequency but different phases. Specifically, the data signal transmitted from the LSI 31-2 via radio is a straight line through which a direct wave between the LSI 31-2 and the predetermined LSI 31 is propagated with respect to the carrier signal in the predetermined LSI 31. Or a path through which reflected waves that change depending on the positional relationship between the LSI 31-2 and the predetermined LSI 31 and the wall surface of the housing 1 and the arrangement of a plurality of units in the housing 1 are propagated to the predetermined LSI 31. There is a delay time of bbb [μsec] determined by the distance of the path through which stronger radio waves are propagated.

  Further, the carrier signal in the predetermined LSI 31 and the data signal transmitted from the LSI 31-3 via the radio have the same frequency but different phases. Specifically, a data signal transmitted from the LSI 31-3 via radio is a straight line through which a direct wave between the LSI 31-3 and the predetermined LSI 31 is propagated with respect to a carrier signal in the predetermined LSI 31. Or a path through which a reflected wave that varies depending on the positional relationship between the LSI 31-3 and the predetermined LSI 31 and the wall surface of the housing 1 and the arrangement of a plurality of units in the housing 1 is propagated to the predetermined LSI 31. There is a delay time of -ccc [μsec] determined by the distance of the path through which stronger radio waves are propagated. For example, if the physical distance that radio waves are propagated between the predetermined LSI 31 and LSI 31-3 is shorter than the physical distance that radio waves are propagated between the predetermined LSI 31 and the injection signal oscillator, the LSI 31- 3 causes a negative delay time in the data signal transmitted via radio.

  FIG. 11 is a diagram illustrating an example of the phase delay amount table 201 stored in the predetermined LSI 31.

  The phase delay amount table 201 in FIG. 11 includes the phase of the carrier signal of the predetermined LSI 31 in FIG. 10 and each of the LSI 31-1 to LSI 31-3 in the transmission source that is information for specifying each of the LSI 31-1 to LSI 31-3. Is stored in association with a delay time which is a phase difference from the phase of the data signal transmitted through the radio.

  The transmission source, which is information for specifying each of the LSI 31-1 to LSI 31-3, is predetermined information, for example, the classification of the synchronization unit 73 via the wired input / output I / F 51 and the signal processing unit 52. It is included in the control signal supplied to the unit 181. Further, for example, LSI 31-1 to LSI 31, such as a device ID for specifying a device or an ID for specifying a communication node, included in a data signal transmitted from each of LSI 31-1 to LSI 31-3 via radio. Data specifying each of -3 may be used as a transmission source.

  Moreover, you may make it acquire the control signal containing a transmission source via a radio | wireless, for example.

  The phase delay amount table 201 illustrated in FIG. 11 includes, for example, a carrier signal in a predetermined LSI 31 for a data signal transmitted from the LSI 31-1 via radio to a transmission source that is information for specifying the LSI 31-1. Is stored in association with delay time aaa [μsec]. The phase delay amount table 201 includes, for example, a delay time of a data signal transmitted from the LSI 31-2 over the air to a transmission source that is information for identifying the LSI 31-2 with respect to the carrier signal in the predetermined LSI 31. bbb [μsec] is stored in association. Similarly, in the phase delay amount table 201, for example, a delay of a data signal transmitted from the LSI 31-3 over the air to the transmission source, which is information specifying the LSI 31-3, with respect to the carrier signal in the predetermined LSI 31 Time-ccc [μsec] is stored in association with each other.

  Returning to FIG. 8, the classification unit 181 includes the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the phase of the data signal transmitted from each of the plurality of LSIs 31 supplied from the demodulation unit 72 via radio. The phase difference of is detected or calculated. Further, the classification unit 181 acquires information specifying each of the plurality of LSIs 31 supplied from the signal processing unit 52.

  The classification unit 181 detects or calculates the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the data signal transmitted from each of the plurality of LSIs 31 supplied from the demodulation unit 72 via radio. The phase difference from the first phase and the acquired information specifying each of the plurality of LSIs 31 supplied from the signal processing unit 52 are written in the phase delay amount table 201 in association with each other. That is, the classification unit 181 newly creates the phase delay amount table 201.

  Further, when the classification unit 181 acquires information specifying each of the plurality of LSIs 31 supplied from the signal processing unit 52, the classification unit 181 determines whether the information specifying the acquired LSIs 31 is in the phase delay amount table 201. To do. In addition, when the phase difference is detected, the classification unit 181 is supplied from the injection locking oscillation unit 55 corresponding to the information specifying each of the plurality of LSIs 31 supplied from the signal processing unit 52 in the phase delay amount table 201. Whether the phase difference (delay time) between the phase of the carrier signal to be transmitted and the phase of the data signal transmitted from each of the plurality of LSIs 31 supplied from the demodulator 72 by radio matches the detected phase difference Determine if.

  Further, when it is determined that the phase delay amount table 201 does not include information for specifying each of the plurality of LSIs 31 supplied from the signal processing unit 52, the classification unit 181 stores the plurality of LSI 31 in the phase delay amount table 201. A phase difference (delay time) between the information specifying each and the phase of the data signal supplied from the injection locking oscillation unit 55 is written in correspondence with the information. That is, the classification unit 181 updates the information and the phase difference that are stored in the phase delay amount table 201 and specify each of the plurality of LSIs 31.

  Furthermore, the classifying unit 181 corresponds to information specifying each of the plurality of LSIs 31 in the phase delay amount table 201 and the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the plurality of types supplied from the demodulation unit 72. If the phase difference (delay time) from the phase of the data signal transmitted via radio from each of the LSIs 31 does not match the detected phase difference, each of the plurality of LSIs 31 is stored in the phase delay amount table 201. A phase difference between the phase of the carrier signal supplied from the injection locking oscillator 55 and the phase of the data signal transmitted from each of the plurality of LSIs 31 supplied from the demodulator 72 corresponding to the specified information Write (delay time). That is, the classification unit 181 updates the phase difference stored in the phase delay amount table 201.

  Further, the classification unit 181 is supplied from the demodulation unit 72 and the phase of the carrier signal supplied from the injection locking oscillation unit 55 corresponding to the information specifying each of the plurality of LSIs 31 supplied from the acquired signal processing unit 52. The phase difference (delay time) from the phase of the data signal transmitted from each of the plurality of LSIs 31 via radio is read from the phase delay amount table 201 and supplied to the phase synchronization unit 182.

  The phase synchronization unit 182 supplies the phase of the carrier signal supplied from the injection locking oscillation unit 55 supplied from the classification unit 181 and the data transmitted from each of the plurality of LSIs 31 supplied from the demodulation unit 72 via radio. Based on the phase difference (delay time) from the signal phase, the phase of the carrier signal is synchronized with the phase of the data signal transmitted from another LSI 31 via radio.

  The phase synchronization unit 182 supplies a synchronization carrier signal, which is a carrier signal synchronized with the phase of the data signal transmitted from each of the plurality of LSIs 31 via radio, to the demodulation unit 72.

  In this way, a carrier signal having a phase that is reliably synchronized with the phase of the received data signal can be used for demodulating the data signal.

  Next, a data signal transmission / reception process in the LSI 31 of FIG. 2 will be described with reference to the flowchart of FIG.

  First, in step S11, the wired input / output I / F 51 receives a data signal transmitted via a wired line. Alternatively, the antenna 54 receives a data signal that is a radio wave transmitted from another LSI 31. The antenna 54 supplies a data signal of an electrical signal to the communication unit 53.

  In step S12, the wired input / output I / F 51 determines whether or not it is a wired data input. Further, the communication unit 53 determines whether or not the data is input wirelessly. That is, the wired input / output I / F 51 and the communication unit 53 determine whether a data signal transmitted via a wire is received or a data signal transmitted via a wireless communication is received.

  If it is determined in step S12 that the input is wired data, the process proceeds to step S13, and the wired input / output I / F 51 inputs data. That is, the wired input / output I / F 51 receives a data signal transmitted via a wired line. The wired input / output I / F 51 supplies a data signal received via a wire to the signal processing unit 52.

  On the other hand, if it is determined in step S12 that the data input is not wired, that is, if it is determined that a data signal transmitted via radio is received, the process proceeds to step S14, where the demodulator 72 receives the data signal. Enter.

  More specifically, the antenna 54 supplies the demodulator 72 with a data signal that is an electrical signal obtained by receiving a data signal that is a radio wave. The demodulator 72 supplies the data signal supplied from the antenna 54 to the synchronizer 73. The synchronization unit 73 synchronizes the phase of the carrier signal supplied from the injection locking oscillation unit 55 with the phase of the data signal supplied from the demodulation unit 72. The synchronization unit 73 supplies the carrier signal whose phase is synchronized to the demodulation unit 72. The demodulator 72 demodulates the data signal, which is an electrical signal supplied from the antenna 54, with the carrier signal supplied from the injection locked oscillator 55 and whose phase is synchronized in the synchronizer 73. The demodulator 72 supplies the demodulated data signal to the signal processor 52.

  After step S13 or step S14, the process proceeds to step S15.

  In step S <b> 15, the signal processing unit 52 performs arbitrary signal processing on the data signal supplied from the wired input / output I / F 51 or the communication unit 53. For example, in step S15, the signal processing unit 52 decodes or encodes the data signal.

  In step S <b> 16, the communication unit 53 determines whether or not data output is performed wirelessly. Also, the wired input / output I / F 51 determines whether or not the data output is wired. That is, the communication unit 53 and the wired input / output I / F 51 determine whether to transmit a data signal subjected to signal processing via wireless or to transmit a data signal subjected to signal processing via wired communication.

  If it is determined in step S16 that the data output is wireless, the process proceeds to step S17, and the signal processing unit 52 supplies the data signal subjected to the signal processing to the communication unit 53. The modulation unit 71 of the communication unit 53 inputs data. Specifically, the modulation unit 71 is a carrier signal supplied from the injection locking oscillation unit 55, a data signal supplied from the signal processing unit 52, and a data signal to be transmitted to another LSI 31 via radio. Modulate. The modulation unit 71 supplies the modulated data signal to the antenna 54.

  On the other hand, if it is determined in step S16 that the data output is not wireless, that is, if it is determined to transmit a data signal subjected to signal processing via a wire, the process proceeds to step S18, and the signal processing unit 52 The data signal subjected to the signal processing is supplied to the wired input / output I / F 51. The wired input / output I / F 51 inputs data.

  After step S17 or step S18, the process proceeds to step S19.

  In step S19, the antenna 54 radiates the modulated data signal supplied from the modulator 71 as a radio wave, and the process ends. Alternatively, the wired input / output I / F 51 transmits the data signal supplied from the signal processing unit 52 via the wire, and the processing ends.

  As described above, the LSI 31 can perform arbitrary signal processing by transmitting / receiving data to / from another LSI 31 via wire or wireless.

  Next, the wireless communication processing of the LSI 31 in FIG. 2 will be described with reference to the flowchart in FIG.

  First, in step S31, the communication unit 53 determines whether or not to transmit data via radio.

  If it is determined in step S31 that data is transmitted, that is, data is not received, the communication unit 53 sets the communication mode to the transmission mode, and proceeds to step S32. Specifically, for example, the communication unit 53 sets the communication mode to the transmission mode by rewriting information indicating its own communication mode.

  In the transmission mode, the LSI 31 performs transmission processing in the same manner as CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) in a wireless local area network (LAN), for example.

  In the CSMA / CA system in a wireless LAN, in order to avoid a collision between a data signal transmitted from a predetermined wireless station and a data signal transmitted from another wireless station, carrier sense of the wireless channel usage is detected in advance, If the usage state is an idle state that is not in use, data is immediately transmitted, and if it is busy and in use, it waits without transmitting data until the idle state is reached.

  In step S <b> 32, the communication unit 53 performs carrier sense based on the signal supplied from the antenna 54. Specifically, the communication unit 53 performs sensing of the frequency band of the carrier signal synchronized between each of the plurality of LSIs 31 in the housing 1.

  In step S33, the communication unit 53 determines whether another LSI 31 is communicating based on the sensing result of the frequency band of the carrier signal.

  If it is determined in step S33 that the other LSI 31 is not communicating, the process proceeds to step S34.

  In step S <b> 34, the modulation unit 71 of the communication unit 53 acquires the data signal subjected to signal processing from the signal processing unit 52. The modulation unit 71 is a carrier signal supplied from the injection locking oscillation unit 55, and is a data signal supplied from the signal processing unit 52, and modulates a data signal transmitted to the other LSI 31 via radio. The modulation unit 71 supplies the modulated data signal to the antenna 54. The antenna 54 radiates the modulated data signal supplied from the modulation unit 71 as a radio wave. That is, the communication unit 53 causes the antenna 54 to transmit a data signal.

  In step S35, the communication unit 53 determines whether or not data transmission has been performed for an arbitrary time or an arbitrary number of times.

  If it is determined in step S35 that data transmission has been performed for an arbitrary time or an arbitrary number of times, the processing ends. On the other hand, when it is determined that data transmission is not performed for an arbitrary time or an arbitrary number of times, the process returns to step S34 and repeats the process of transmitting data.

  On the other hand, if it is determined in step S33 that another LSI 31 is communicating, specifically, for example, if it is determined that an LNA (Low Noise Amplifier) built in the demodulator 72 is saturated, Proceed to S36.

  In step S36, the communication unit 53 converts the communication mode to the reception mode. Specifically, for example, the communication unit 53 sets the communication mode to the reception mode by rewriting information indicating its own communication mode.

  In step S <b> 37, the communication unit 53 waits until the communication of the other LSI 31 is completed. Although details will be described later, the communication unit 53 recognizes that the communication of the other LSI 31 has ended, and the processing returns to step S32. At this time, the communication unit 53 converts the communication mode to the transmission mode. Specifically, for example, the communication unit 53 sets the communication mode to the transmission mode by rewriting information indicating its own communication mode.

  More specifically, processing in the transmission mode of the LSI 31 will be described with reference to the timing chart of FIG.

  For example, first, when the LSI 31-1 is transmitting data, the LSI 31-2 and the LSI 31-3 determine that the radio channel is busy as a result of carrier sense, that is, the other LSI 31 is communicating. Then, it waits until the transmission of the LSI 31-1 is completed.

  When the transmission of the LSI 31-1 ends and the radio channel changes to idle, the LSI 31-2 and the LSI 31-3 wait for an IFS (Inter Frame Space) time, which is a fixed time.

  The LSI 31-2 and the LSI 31-3 further perform carrier sensing for the Back Off time determined by random numbers after the IFS has elapsed. LSI 31-2 and LSI 31-3 transmit data after confirming that the radio channel is idle.

  At this time, since the Back Off time of the LSI 31-2 is shorter than the Back Off time of the LSI 31-3, the LSI 31-2 starts data transmission before the LSI 31-3.

  Next, the LSI 31-2 is transmitting data, and the LSI 31-1 and the LSI 31-3 determine that the radio channel is busy as a result of carrier sense, that is, the other LSI 31 is communicating. Wait until transmission of 2 ends.

  When the transmission of the LSI 31-2 ends and the radio channel changes to idle, the LSI 31-1 and the LSI 31-3 wait for an IFS time that is a predetermined fixed time.

  The LSI 31-1 and the LSI 31-3 further perform carrier sensing for the Back Off time determined by random numbers after the IFS has elapsed. LSI 31-1 and LSI 31-3 transmit data after confirming that the radio channel is idle.

  At this time, since the Back Off time of the LSI 31-3 is shorter than the Back Off time of the LSI 31-1, the LSI 31-3 starts data transmission before the LSI 31-1.

  An example of the configuration of a data signal to be transmitted is shown in FIG.

  One frame of the data signal to be transmitted shown in FIG. 15 includes significant information ID (Identification), wideband data, and End mark.

  The significant information ID is, for example, how the wideband data is processed, the preamble signal, the secondary narrowband data obtained as a result of the signal processing unit 52 performing the signal processing of the wideband signal, or the wideband data. An operand, a task, a job, or the like indicating whether or not to perform a simple signal processing.

  The broadband data is, for example, a video signal. When the broadband data is a video signal, the significant information ID includes, for example, a preamble signal, a frame (field) number, secondary information, an audio signal, an audio / video synchronization signal, an operand, a task, a job, or a state transition table. Etc. Also, since the carrier signal used for demodulation is synchronized with the data signal, the preamble signal may be shorter than that used in normal radio, such as when the injection signal is transmitted wirelessly.

  End mark is data indicating the end of the packet signal.

  Returning to FIG. 13, if it is determined in step S31 that data transmission is not to be performed, the process proceeds to step S38.

  In step S38, the communication unit 53 determines whether to receive data via wireless.

  If it is determined in step S38 that data is received, the communication unit 53 sets the communication mode to the reception mode, and the process proceeds to step S39. Specifically, for example, the communication unit 53 sets the communication mode to the reception mode by rewriting information indicating its own communication mode.

  In the reception mode, the LSI 31 starts reception processing if there is a data signal transmitted from another LSI 31 via radio.

  In step S39, the antenna 54 receives a data signal which is a radio wave transmitted from another LSI 31. The antenna 54 supplies a data signal, which is an electrical signal obtained by receiving a data signal, which is a radio wave, to the demodulator 72. The demodulator 72 supplies the data signal supplied from the antenna 54 to the synchronizer 73. The classification unit 181 of the synchronization unit 73 includes a phase difference between the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the phase of the data signal transmitted from the other LSI 31 supplied from the demodulation unit 72 via radio. Is detected.

  In step S <b> 40, the classification unit 181 obtains information specifying another LSI 31 supplied from the signal processing unit 52.

  In step S <b> 41, the classification unit 181 determines whether the information for identifying the other LSI 31 acquired from the signal processing unit 52 is in the phase delay amount table 201.

  If it is determined in step S41 that the information specifying the other LSI 31 acquired from the signal processing unit 52 is in the phase delay amount table 201, the process proceeds to step S42.

  In step S42, the classification unit 181 demodulates and demodulates the phase of the carrier signal supplied from the injection locking oscillation unit 55 corresponding to the information specifying the other LSI 31 supplied from the signal processing unit 52 in the phase delay amount table 201. It is determined whether or not the phase difference (delay time) from the phase of the data signal transmitted from another LSI 31 supplied from the unit 72 via radio matches the detected phase difference.

  If it is determined in step S42 that the phase difference (delay time) corresponding to the information specifying the transmission source in the phase delay amount table 201 matches the detected phase difference, the process proceeds to step S44.

  On the other hand, when it is determined in step S41 that the acquired information for specifying the other LSI 31 is not in the phase delay amount table 201, the process proceeds to step S43.

  On the other hand, if it is determined in step S42 that the phase difference (delay time) corresponding to the information specifying the transmission source of the phase delay amount table 201 does not match the detected phase difference, the process proceeds to step S43. move on.

  In step S43, the classification unit 181 specifies another LSI 31 in the phase delay amount table 201 when it is determined in step S41 that the acquired information specifying the other LSI 31 is not in the phase delay amount table 201. Corresponding to the information and the information, the phase difference (delay time) between the phase of the data signal supplied from the injection locking oscillation unit 55 is written. That is, the classification unit 181 updates the information specifying the other LSI 31 and the phase difference stored in the phase delay amount table 201. Further, in step S42, the classification unit 181 determines that the phase difference (delay time) corresponding to the information specifying the transmission source in the phase delay amount table 201 does not match the detected phase difference. In the quantity table 201, the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the other LSI 31 supplied from the demodulation unit 72 corresponding to the transmission source which is information for specifying the other LSI 31 is transmitted via radio. Write the phase difference (delay time) from the phase of the incoming data signal. That is, the classification unit 181 updates the phase difference stored in the phase delay amount table 201.

  In this way, the LSI 31 performs a process of receiving data via wireless while updating the phase delay amount table 201.

  In step S44, the classification unit 181 is supplied from the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the demodulation unit 72 corresponding to the information specifying the other LSI 31 supplied from the acquired signal processing unit 52. The phase difference (delay time) from the phase of the data signal transmitted from another LSI 31 via radio is read from the phase delay amount table 201 and supplied to the phase synchronization unit 182. The phase locking unit 182 supplies the phase of the carrier signal supplied from the injection locking oscillation unit 55 supplied from the classification unit 181 and the data signal transmitted from the other LSI 31 supplied from the demodulation unit 72 via radio. Based on the phase difference (delay time) from the phase, the phase of the carrier signal is synchronized with the phase of the data signal transmitted from another LSI 31 via radio. That is, the phase synchronization unit 182 generates a synchronization carrier signal. In addition, the phase synchronization unit 182 supplies a synchronization carrier signal, which is a carrier signal synchronized with the phase of the data signal transmitted from another LSI 31 via radio, to the demodulation unit 72.

  In step S45, the multiplier 161 of the demodulator 72 synchronizes the data signal supplied from the antenna 54 and the phase of the data signal supplied from the antenna 54 supplied from the phase synchronizer 182 of the synchronizer 73. The data signal is demodulated by multiplying the signal with a synchronous carrier signal. That is, the multiplier 161 demodulates the data signal by the synchronous detection method. The multiplier 161 supplies the demodulated data signal obtained as a result of the multiplication to the signal reproduction circuit 162. The signal reproduction circuit 162 reproduces a data signal synchronized with the main clock from the data signal demodulated by the multiplier 161 with the main clock as a reference. The signal reproduction circuit 162 supplies the reproduced data signal to the signal processing unit 52.

  In step S <b> 46, the signal processing unit 52 determines from the data signal supplied from the signal reproduction circuit 162 whether or not reception of the data signal has been detected. If the end of reception is detected, the process ends.

  On the other hand, if it is not detected in step S46 that the data signal has been received, the process returns to step S45, and the process of reproducing the signal is repeated.

If it is determined in step S38 that data is not received, the communication unit 53 does not set the communication mode, and the process ends.

  As described above, the LSI 31 can transmit a data signal wirelessly to other LSIs in the housing. In addition, the LSI 31 can receive data signals from other LSIs in the housing via radio.

  When the LSI 31 or a unit (not shown) in which the LSI 31 is arranged is initialized, the phase delay amount table 201 is newly created in synchronization with the initialization. For example, the LSI 31 or a unit (not shown) in which the LSI 31 is arranged is initialized when the power is turned on. Further, for example, the LSI 31 or a unit (not shown) in which the LSI 31 is arranged may be initialized at a timing of once every several seconds, minutes or hours.

  Further, when the LSI 31 or a unit (not shown) on which the LSI 31 is arranged is initialized, the LSI 31 may perform wireless communication as initialization processing.

  A process of creating the phase delay amount table 201 will be described with reference to the flowchart of FIG.

  In step S71, a carrier signal transmitted from another LSI 31 as a transmission source via radio is input. Specifically, for example, the antenna 54 receives a data signal that is a radio wave transmitted from another LSI in association with wireless communication performed as an initialization process. The antenna 54 supplies a data signal, which is an electrical signal obtained by receiving a data signal, which is a radio wave, to the demodulator 72. The demodulator 72 supplies the data signal supplied from the antenna 54 to the synchronizer 73.

  In step S72, the classification unit 181 of the synchronization unit 73 performs the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the phase of the data signal transmitted from the other LSI 31 supplied from the demodulation unit 72 via radio. The phase difference is calculated.

  In step S <b> 73, the classification unit 181 acquires information specifying another LSI 31 supplied from the signal processing unit 52.

  In step S74, the classification unit 181 calculates the phase of the carrier signal supplied from the injection locking oscillation unit 55 and the phase of the data signal transmitted from the other LSI 31 supplied from the demodulation unit 72 via radio. And the obtained information for specifying the other LSI 31 supplied from the signal processing unit 52 are written in the phase delay amount table 201 in association with each other. That is, the classification unit 181 newly creates the phase delay amount table 201, and the process ends.

  In this way, the LSI 31 can newly create the phase delay amount table 201.

  FIG. 17 is a diagram illustrating another example of the signal processing apparatus according to the embodiment of the present invention.

  A power source 241 is disposed inside the housing 1 of the signal processing apparatus of FIG. The unit 11 is connected to a power source 241 via a power line 242 for supplying power and a connector 243. The unit 12 is connected to a power source 241 through a power line 242 and a connector 244 that supply power.

  For example, the LSI 31-1 provided in the unit 11 via the power line 242, the connector 243, and the connector 244 from the injection synchronous oscillator 55 of the LSI 31-3 provided in the unit 12 as an injection signal oscillator An injection signal is supplied to the LSI 31-2. An injection signal oscillator is provided in the power supply 241 so that an injection signal is supplied from the injection signal oscillator provided in the power supply 241 to the LSI 31-1 to the LSI 31-3 via the power line 242, the connector 243, and the connector 244. It may be.

  With such a configuration, the injection signal can be transmitted from another LSI 31 or an injection signal oscillator via a wire that is the power line 242.

  FIG. 18 is a diagram showing still another example of the signal processing apparatus according to the embodiment of the present invention.

  An oscillator 261 is disposed inside the housing 1 of the signal processing apparatus of FIG. The oscillator 261 is connected to the unit 11 and the unit 12 via a wire.

  In the above description, the injection locking oscillator 91 of the LSI 31 is an injection signal oscillator. However, according to the configuration shown in FIG. 18, the oscillator 261 can be an injection signal oscillator.

  Furthermore, in the above description, the phase delay amount table 201 is used when receiving a data signal, but may be used for designating a transmission destination when transmitting a data signal.

  For example, when one LSI 31 performs centralized control of the signal processing apparatus of FIG. 1, the LSI 31 serving as a host polls each of the other LSIs 31 arranged in each unit to inquire whether transmission is possible. You may do it.

  In addition, for example, when there is a risk that a user intentionally opens the housing 1 of the signal processing device in FIG. 1 and radio waves leak from the antenna 54 of the LSI 31, in order to guarantee the confidentiality of data in the housing 1. In addition, a sensor for detecting the opening of the housing 1 may be provided, and when the opening of the housing 1 is detected, the emission of radio waves from the antenna 54 may be stopped immediately. More specifically, the stopping method is, for example, turning off the power of the unit, turning off the LSI 31 including the communication unit 53, or turning off the communication unit 53 of the LSI 31 including the communication unit 53. It can be. In addition, as a method for detecting that the user has intentionally opened the housing 1, for example, a significant mismatch between the delay time in the phase delay amount table 201 and the detected phase difference is between a plurality of transmission sources. There is a method to detect when it occurs.

  As described above, when a plurality of signal processing units are stored in one housing, a data signal can be signal-processed. In addition, a plurality of signal processing units provided in a predetermined signal processing unit among the plurality of signal processing units are synchronized with an injection signal transmitted from another signal processing unit or an oscillator via a wire. Oscillate to generate a carrier signal for demodulating a data signal transmitted from any one of a plurality of signal processing units by modulating a data signal to be transmitted to any one by radio, A carrier signal provided in the signal processing unit modulates a data signal to be transmitted to any one of a plurality of signal processing units by radio, or is transmitted by radio from any of the plurality of signal processing units. When the incoming data signal is demodulated, the data signal can be efficiently transmitted / received wirelessly within the housing of the apparatus.

  The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

It is a figure which shows the example of the signal processing apparatus which is one embodiment of this invention. It is a block diagram which shows the example of a structure of a signal processing apparatus. It is a block diagram which shows the structural example of an injection locking oscillation part. It is a figure which shows the structural example of a unit. It is a figure explaining the phase difference of the injection signal by physical distance. It is a block diagram which shows the structural example of a modulation part. It is a block diagram which shows the structural example of a demodulation part. It is a block diagram which shows the structural example of a synchronizer. It is a block diagram which shows the structural example of a classification | category part. It is a figure explaining the time difference of the carrier signal of a predetermined LSI, and the data signal from another LSI. It is a figure explaining the example of a structure of a phase delay amount table. It is a flowchart explaining the example of the transmission / reception process of LSI. 5 is a flowchart illustrating an example of LSI radio communication processing. 5 is a timing chart illustrating an example of LSI transmission processing. It is a figure which shows the example of a structure of a data signal. It is a flowchart explaining the example of a phase delay amount table creation process. It is a figure which shows the other example of the signal processing apparatus which is one embodiment of this invention. It is a figure which shows the further another example of the signal processing apparatus which is one embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Housing | casing, 11 and 12 board | substrate, 31-1 thru | or 31-3 LSI, 51 Wired input / output I / F, 52 Signal processing part, 53 Communication part, 54 Antenna, 55 Injection-locking oscillation part, 71 Modulation part, 72 Demodulation Unit, 73 synchronizing unit, 91 injection locking oscillator, 92 n / m multiplication circuit, 121 oscillator, 141 multiplier, 161 multiplier, 162 signal regeneration circuit, 181 classification unit, 182 phase synchronization unit, 201 phase delay amount table, 241 power supply, 242 power line, 243 and 244 connectors, 261 oscillator

Claims (5)

In a signal processing device comprising a plurality of signal processing units each of which is a plurality of signal processing units stored in one housing and which processes a data signal which is a signal of predetermined data,
The plurality of signal processing units are provided in a predetermined signal processing unit of the plurality of signal processing units in synchronization with an injection signal transmitted from another signal processing unit or an oscillator via a wire. Modulating the data signal to be transmitted over the radio or generating a carrier signal for demodulating the data signal transmitted over the radio from any of the plurality of signal processing units Injection locking oscillation means for oscillating;
The carrier signal, which is provided in the signal processing unit, modulates the data signal transmitted via radio to any of the plurality of signal processing units, or is wireless from any of the plurality of signal processing units. A signal processing apparatus comprising: communication means for demodulating the data signal transmitted via the communication means. The injection locking oscillation means synchronizes the phase of the injection signal in the oscillator or the other signal processing unit that transmits the injection signal with the phase of the received injection signal, and synchronizes the phase. The signal processing apparatus according to claim 1, wherein the signal processing apparatus oscillates so as to generate the carrier signal in synchronization with an injection signal. The information specifying each of the plurality of signal processing units is associated with the phase difference between the phase of the carrier signal and the phase of the data signal transmitted from each of the plurality of signal processing units via radio. Storage means for storing;
The phase difference between the phase of the carrier signal and the phase of the data signal transmitted from each of the plurality of signal processing units corresponding to information identifying each of the plurality of signal processing units The signal processing apparatus according to claim 2, further comprising: a synchronization unit configured to synchronize a phase of the carrier signal with a phase of the data signal transmitted from the other signal processing unit via radio. A power supply for supplying power to the plurality of signal processing units via a power line;
The signal processing apparatus according to claim 1, wherein the injection signal is transmitted from the other signal processing unit or the oscillator via a wire that is the power line. In a signal processing method of a signal processing device including a plurality of signal processing units each of which is a plurality of signal processing units stored in one housing and which processes a data signal which is a signal of predetermined data, respectively,
A predetermined signal processing unit of the plurality of signal processing units is
In synchronization with an injection signal transmitted from another signal processing unit or an oscillator via a wire, the data signal to be transmitted wirelessly to any of the plurality of signal processing units is modulated, or the plurality of the plurality of signal processing units Oscillates to generate a carrier signal for demodulating the data signal transmitted via radio from any of the signal processing units,
The data signal transmitted from any of the plurality of signal processing units via the radio or modulated by the carrier signal via the radio to any of the plurality of signal processing units. A signal processing method for demodulating a signal.

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