JP2007116252A - Wireless communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication apparatus wherein the communication speed can be enhanced and resistance to interference can be provided while suppressing an increase in the circuit scale. <P>SOLUTION: When a first enclosure unit K11 transmits main data to a second enclosure unit K12, the first enclosure unit K11 executes wireless communication of the main data by using the QPSK system, and when the second enclosure unit K12 transmits a control signal to the first enclosure unit K11, the second enclosure unit K12 carries out wireless communication by using the UWB-IR system. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication apparatus, and is particularly suitable for application to a method of performing bidirectional communication using different transmission methods.

In a conventional wireless communication apparatus, bidirectional communication is performed by using a phase modulation method such as BPSK or QPSK regardless of the amount of data.
Further, for example, in Patent Document 1, in order to realize simple and high-speed wireless data communication, a narrowband wireless device using an ad hoc network system is provided in addition to a pulse communication wireless device. A method for transmitting and receiving control data such as a request between wireless communication apparatuses using a wireless communication device is disclosed.
JP 2004-128616 A

  However, if the same transmission method is used regardless of the amount of data in bidirectional communication, even if there is a bias in the amount of data between transmission and reception, it is necessary to mount the same transmission circuit and reception circuit. There is a problem that the power consumption is increased while increasing the power consumption. Furthermore, in the method of performing bi-directional communication using the same transmission method, if the communication speed is reduced in order to provide interference resistance to control signal communication, the occupied time that can be allocated to main data communication decreases. There was a problem that the throughput decreased.

On the other hand, in the method disclosed in Patent Document 1, since communication of control signals is performed by a narrowband wireless device, it is necessary to reduce the communication speed in order to provide interference resistance to the communication of control signals. There is a problem that the throughput is reduced.
SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless communication apparatus capable of improving communication speed and having interference resistance while suppressing an increase in circuit scale.

In order to solve the above-described problem, according to a wireless communication apparatus according to an aspect of the present invention, a first wireless communication unit that performs wireless communication while modulating a carrier wave with data, and used for control or processing of the data And a second wireless communication unit that performs wireless communication while directly modulating the control signal to be transmitted.
This eliminates the need to use a mixer or a low-pass filter to transmit and receive control signals wirelessly, enabling a reduction in circuit scale and ensuring a communication speed necessary for data transmission, The communication speed of the control signal can be reduced, and the power consumption can be reduced.

Also, according to the wireless communication apparatus according to an aspect of the present invention, the first wireless communication unit uses a modulation scheme using BPSK, QPSK, 64QAM, or 256QAM, and the second wireless communication unit uses UWB- A modulation method using IR is used.
As a result, the communication speed of data other than the control signal can be increased, the spectrum distribution of the control signal can be widened, and the interference resistance can be improved. In addition, it is possible to concentrate the energy of the control signal in a short time, and it is possible to reduce the occupation time allocated to communication of the control signal, so the occupation time that can be allocated to communication of data other than the control signal Can be increased and the throughput can be improved.

Further, according to the wireless communication apparatus according to one aspect of the present invention, the second wireless communication unit transmits a control signal in accordance with a change timing of a symbol transmitted from the first wireless communication unit. And
As a result, it is possible to superimpose a control signal on a region where the amplitude of data is small, and even when data and a control signal are transmitted simultaneously, interference with the control signal can be suppressed. For this reason, it is possible to improve the throughput while suppressing the deterioration of the interference resistance of the control signal.

  According to the wireless communication apparatus of one aspect of the present invention, the first wireless transmission unit that performs wireless transmission while modulating the carrier wave with data, and the first wireless transmission unit that receives the data transmitted from the first wireless transmission unit. A first wireless reception unit, a second wireless transmission unit that performs wireless transmission while directly modulating a control signal used for control or processing of the data, and a second wireless transmission unit that receives the control signal transmitted from the second wireless transmission unit And 2 wireless receivers.

This eliminates the need to use a mixer or a low-pass filter to transmit and receive control signals wirelessly, enabling a reduction in circuit scale and ensuring a communication speed necessary for data transmission, The communication speed of the control signal can be reduced, and the power consumption can be reduced.
Further, according to the wireless communication apparatus according to one aspect of the present invention, the second wireless transmission unit transmits information on a carrier frequency when receiving data in the first wireless reception unit to the second wireless reception unit. The first wireless transmission unit adjusts a carrier frequency when modulating the carrier wave with data based on information on the carrier frequency received by the second wireless reception unit.

Thereby, the information regarding the carrier frequency can be shared between transmission and reception without depending on the accuracy of the carrier frequency between transmission and reception. For this reason, even when there is a deviation in the carrier frequency between transmission and reception, it is possible to quickly match the carrier frequency between transmission and reception while suppressing an increase in circuit scale, and stable wireless communication using carrier modulation. Can be done.
According to the wireless communication apparatus of one aspect of the present invention, the first wireless transmission unit that performs wireless transmission while modulating the carrier wave with data, and the first wireless transmission unit that receives the data transmitted from the first wireless transmission unit. 1 radio receiving unit, a second radio transmitting unit that performs radio transmission while directly modulating a control signal used for controlling or processing the data at a timing synchronized with a reference clock, and a radio signal transmitted from the second radio transmitting unit. And a second wireless receiver for receiving the control signal, wherein the first wireless transmitter generates the carrier according to a reference clock regenerated based on a received waveform of the control signal.

As a result, wireless communication using carrier modulation can be performed between the first wireless transmission unit and the first wireless reception unit without providing a local oscillator for generating a carrier wave in the first wireless transmission unit. In addition, the frequency deviation between transmission and reception can be reduced. For this reason, it is possible to stably perform wireless communication using carrier wave modulation while suppressing an increase in circuit scale.
In addition, according to the wireless communication device according to one aspect of the present invention, the first housing portion, the second housing portion coupled to the first housing portion, the first housing portion, and the second housing portion. A connecting part that connects the first casing part and the second casing part so that the positional relationship with the casing part can be changed, and mounted on the first casing part to perform external wireless communication An external wireless communication unit; a display unit mounted on the second housing unit; a first wireless transmission unit mounted on the first housing unit that performs wireless transmission while modulating a carrier wave with data; A first wireless receiving unit that is mounted on the second casing unit and receives data transmitted from the first wireless transmitting unit, and is mounted on the second casing unit and used for controlling or processing the data. A second wireless transmission unit that performs wireless transmission while directly modulating the control signal; and mounted on the first casing unit, from the second wireless transmission unit Characterized in that it comprises a second radio receiver for receiving signals control signal.

  As a result, the amount of display data transmitted from the first casing unit to the second casing unit is increased in response to an increase in screen size and resolution of the display unit mounted on the second casing unit. Even in this case, the display data can be transmitted to the display unit without delay without complicating the configuration of the connecting unit. In addition, it is not necessary to use a mixer or a low-pass filter in order to transmit and receive the control signal wirelessly, it becomes possible to reduce the circuit scale, and it is possible to reduce the communication speed of the control signal, Power consumption can be reduced. As a result, the wireless communication terminal can be operated for a long time, and the wireless communication terminal can be reduced in size, thickness and reliability, and the portability of the wireless communication terminal is not impaired. It is possible to increase the screen size and functionality.

  According to the wireless communication device of one aspect of the present invention, the first and second circuit blocks formed in the same semiconductor chip and the first circuit block are formed wirelessly while modulating a carrier wave with data. A first wireless transmission unit that performs transmission; and a first wireless reception unit that is formed in the second circuit block and receives data transmitted from the first wireless transmission unit; and is formed in the second circuit block; A second wireless transmission unit that performs wireless transmission while directly modulating a control signal used for data control or processing, and a control signal that is formed in the first circuit block and is transmitted from the second wireless transmission unit And a second wireless receiving unit.

  As a result, various processes can be performed on the same semiconductor chip, and communication between circuit blocks formed on the semiconductor chip can be performed wirelessly. As a result, the number of wirings formed on the semiconductor chip can be reduced, the degree of freedom in layout design within the semiconductor chip can be improved, and a large amount of data can be exchanged at high speed within the semiconductor chip. It is possible to make it happen.

  In addition, according to the wireless communication device of one aspect of the present invention, the first and second semiconductor chips mounted on the mounting substrate and the first semiconductor chip are formed, and the wireless communication is performed while modulating the carrier wave with the data. A first wireless transmission unit that performs transmission; a first wireless reception unit that is formed in the second semiconductor chip and receives data transmitted from the first wireless transmission unit; and is formed in the second semiconductor chip, A second wireless transmission unit that performs wireless transmission while directly modulating a control signal used for data control or processing, and a control signal that is formed in the first semiconductor chip and transmitted from the second wireless transmission unit And a second wireless receiving unit.

  As a result, communication between the semiconductor chips mounted on the mounting substrate can be performed wirelessly, and the number of wirings formed on the mounting substrate can be reduced. For this reason, it is possible to improve the degree of freedom in layout design on the mounting board, and to exchange a large amount of data on the mounting board at high speed.

Hereinafter, a wireless communication apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a state when a clamshell mobile phone to which the wireless communication control method of the present invention is applied is opened, and FIG. 2 is a clamshell mobile phone to which the wireless communication control method of the present invention is applied. It is a perspective view which shows a state when a telephone is closed.
In FIG. 1 and FIG. 2, an operation button 4 is disposed on the surface of the first housing unit 1, and a microphone 5 is provided at the lower end of the first housing unit 1. An external wireless communication antenna 6 is attached to the upper end. In addition, a display body 8 is provided on the surface of the second housing portion 2, and a speaker 9 is provided on the upper end of the second housing portion 2. In addition, a display body 11 and an imaging element 12 are provided on the back surface of the second housing portion 2. As the display bodies 8 and 11, for example, a liquid crystal display panel, an organic EL panel, a plasma display panel, or the like can be used. As the image sensor 12, a CCD or CMOS sensor can be used. The first housing unit 1 and the second housing unit 2 include internal wireless communication antennas 7 and 10 that perform internal wireless communication between the first housing unit 1 and the second housing unit 2, respectively. Is provided.

  And the 1st housing | casing part 1 and the 2nd housing | casing part 2 are connected via the hinge 3, and the 2nd housing | casing part 2 is made into 1st by rotating the 2nd housing | casing part 2 by using the hinge 3 as a fulcrum. It can be folded on the housing part 1. The operation button 4 can be protected by the second housing unit 2 by closing the second housing unit 2 on the first housing unit 1, and the operation button 4 may be mistaken when carrying a mobile phone. Operation can be prevented. Further, by opening the second housing part 2 from the first housing part 1, the operation button 4 can be operated while viewing the display body 8, a telephone call can be made using the speaker 9 and the microphone 5, and the operation button 4 can be operated. Imaging can be performed while operating.

Here, by using the clamshell structure, the display body 8 can be disposed on almost the entire surface of the second housing portion 2, and the size of the display body 8 can be increased without deteriorating the portability of the mobile phone. It is possible to improve visibility.
Further, by providing the internal wireless communication antennas 7 and 10 in the first housing portion 1 and the second housing portion 2, respectively, the first housing is achieved by internal wireless communication using the internal wireless communication antennas 7 and 10. Data transmission between the unit 1 and the second housing unit 2 can be performed. For example, image data and audio data captured by the first housing unit 1 via the external wireless communication antenna 6 are transferred to the second housing unit 2 by internal wireless communication using the internal wireless communication antennas 7 and 10. , And an image can be displayed on the display body 8 or sound can be output from the speaker 9. In addition, image data captured by the image sensor 12 is sent from the second housing unit 2 to the first housing unit 1 by internal wireless communication using the internal wireless communication antennas 7 and 10, and is used for external wireless communication. It can be sent to the outside via the antenna 6.

  Thereby, it is not necessary to perform data transmission between the first casing unit 1 and the second casing unit 2 by wire, and it is not necessary to pass the flexible wiring board having multiple pins through the hinge 3. For this reason, it becomes possible to suppress the complexity of the structure of the hinge 3 and to prevent the mounting process from becoming complicated, thereby reducing the size and thickness of the mobile phone and increasing the reliability while suppressing an increase in cost. It is possible to increase the screen size and functionality of the mobile phone without impairing the portability of the mobile phone.

In the direction from the first casing unit 1 to the second casing unit 2, wireless communication can be performed while modulating a carrier wave with image data or audio data, and the second casing unit 2 can perform the first casing. In the direction toward the body part 1, wireless communication can be performed while directly modulating a control signal used for control or processing of image data or audio data.
FIG. 3 is a perspective view showing the appearance of a rotary mobile phone to which the wireless communication control method of the present invention is applied.

  In FIG. 3, an operation button 24 is disposed on the surface of the first housing portion 21, a microphone 25 is provided at the lower end of the first housing portion 21, and an upper end of the first housing portion 21 is provided. An external radio communication antenna 26 is attached. A display body 28 is provided on the surface of the second housing part 22, and a speaker 29 is provided on the upper end of the second housing part 22. The first casing portion 21 and the second casing portion 22 have internal wireless communication antennas 27 and 30 that perform internal wireless communication between the first casing portion 21 and the second casing portion 22, respectively. Is provided.

  The first housing portion 21 and the second housing portion 22 are connected via a hinge 23, and the second housing portion 22 is rotated horizontally around the hinge 23 as a fulcrum, thereby The first housing portion 21 can be placed on top of the first housing portion 21, or the second housing portion 22 can be shifted from the first housing portion 21. The operation button 24 can be protected by the second housing portion 22 by arranging the second housing portion 22 on the first housing portion 21, and the operation button 24 can be used when carrying the mobile phone. Can be prevented from being operated by mistake. Further, by rotating the second housing portion 22 horizontally and shifting the second housing portion 22 from the first housing portion 21, the operation button 24 can be operated while viewing the display body 28, the speaker 29 and It is possible to talk while using the microphone 25.

  Here, by providing the antennas 27 and 30 for internal wireless communication in the first housing part 21 and the second housing part 22 respectively, the first housing is used for internal wireless communication using the antennas 27 and 30 for internal wireless communication. Data transmission between the body part 21 and the second housing part 22 can be performed. For example, image data and audio data captured by the first housing unit 21 via the external wireless communication antenna 26 are transferred to the second housing unit 22 by internal wireless communication using the internal wireless communication antennas 27 and 30. The image can be displayed on the display body 28, or the sound can be output from the speaker 29.

  As a result, it is not necessary to pass the flexible wiring board having a large number of pins through the hinge 23, and it is possible to suppress the complexity of the structure of the hinge 23 and to prevent the mounting process from becoming complicated. . For this reason, it is possible to reduce the size and thickness of the mobile phone and increase the reliability while suppressing an increase in cost, and to increase the screen size and functionality of the mobile phone without impairing the portability of the mobile phone. Can be achieved.

In the direction from the first housing unit 21 to the second housing unit 22, wireless communication can be performed while modulating a carrier wave with image data or audio data, and the second housing unit 22 can perform the first housing. In the direction toward the body part 21, wireless communication can be performed while directly modulating a control signal used for control or processing of image data or audio data.
In the above-described embodiment, a mobile phone has been described as an example. However, the present invention can be applied to a video camera, a PDA (Personal Digital Assistance), a notebook personal computer, and the like.

Further, in the above-described embodiment, the method of performing wireless transmission between the first housing units 1 and 21 and the second housing units 2 and 22 has been described as an example. However, in the same semiconductor chip, on the same printed board. Alternatively, the present invention may be applied to wireless transmission in the same casing, in the same module, in the same package, or in a device that is used integrally.
FIG. 4 is a block diagram illustrating a schematic configuration of the wireless communication apparatus according to the first embodiment of the present invention, and FIG. 5 is a diagram illustrating waveforms of respective units processed by the wireless communication apparatus of FIG.

  In FIG. 4, the first casing K11 stores a baseband unit 101a that performs baseband signal processing, a control unit 102 that controls the baseband unit 101a, and various control programs for operating the wireless communication device. ROM 103, RAM 102 that provides a work area when the control unit 102 executes processing, stores the processing result, a local oscillator 105 that generates a local clock, and generates a carrier wave based on the local clock PLL circuit 106, phase shifter 107 that shifts the phase of the carrier wave output from PLL circuit 106 by π / 2, and low-pass that attenuates unnecessary high-frequency components included in in-phase component Q and quadrature component I of the baseband signal. The filters 108a and 108b and the in-phase component Q of the baseband signal are shifted in phase by π / 2. A mixer 109a that mixes with the carrier wave, a mixer 109b that mixes the orthogonal component I of the baseband signal with the carrier wave, an internal wireless communication antenna 110 that transmits internal radio communication radio waves, and receives internal radio communication radio waves. Internal radio receiving antenna 111, bandpass filter 112 for attenuating unnecessary frequency components from the signal received by internal radio receiving antenna 111, and low noise amplifier 113 for amplifying the signal received by internal radio receiving antenna 111 A diode 114 for rectifying a signal received by the internal radio receiving antenna 111; an integrator 115 for integrating the signal rectified by the diode 114; and a level of the signal integrated by the integrator 115 is compared with a specified value. Comparator 116, pseudorandom number generator 118 for generating pseudorandom numbers, and pseudorandom number generator 11 Exclusive OR circuit 117 for restoring the received data is provided by taking the exclusive OR of the comparison results by the pseudo random number and the comparator 116 generated by.

  The second casing K12 includes a baseband unit 121a that performs baseband signal processing, a display body 123 that displays image data and the like, a control unit 122 that controls the baseband unit 121a and the display body 123, and the like. A RAM 124 that provides a work area when the control unit 122 executes processing and stores the processing result, an internal wireless reception antenna 130 that receives radio waves for internal wireless communication, and an internal wireless reception antenna 130 Bandpass filter 131a for attenuating unnecessary frequency components from the received signal, low noise amplifier 132 for amplifying the signal received by internal radio receiving antenna 131a, local oscillator 125 for generating local clock, local clock PLL circuit 126 for generating a carrier wave with reference to the carrier wave generated by PLL circuit 126 An automatic frequency adjustment circuit 139 that performs automatic frequency adjustment, a phase shifter 127 that shifts the phase of the carrier wave output from the PLL circuit 126 by π / 2, and a reception signal that is mixed with a carrier wave whose phase is shifted by π / 2. Via a mixer 129a, a mixer 129b for mixing the received signal with a carrier wave, a low-pass filter 128a, 128b and a low-pass filter 128a, 128b for attenuating unnecessary high-frequency components included in the in-phase component Q and quadrature component I of the received signal, respectively. In the buffers 133a and 133b for amplifying the in-phase component Q and the quadrature component I of the received signal output in this way, the pulse generator 134 for generating pulses, the pseudo-random number generator 136 for generating pseudo-random numbers, and the pseudo-random number generator 136, respectively. The generated pseudo-random number and the baseband signal output from the baseband unit 121a; An exclusive OR circuit 137 for taking an exclusive OR, a switch 135a for turning on / off a pulse output from the pulse generator 134 based on an output from the exclusive OR circuit 137, and transmission of radio waves for internal wireless communication An internal wireless transmission antenna 138 is provided.

  Here, when the main data is transmitted from the first casing K11 to the second casing K12, wireless communication can be performed while modulating the carrier wave with the main data. Further, when a control signal is transmitted from the second casing K12 to the first casing K11, wireless communication can be performed while directly modulating the control signal. Examples of a method of performing wireless communication while modulating a carrier wave with main data include BPSK, QPSK, 64QAM, and 256QAM. Moreover, as a method of performing wireless communication while directly modulating a control signal, for example, UWB-IR (Ultra Wide-band Impulse Radio) can be cited, and OOK (On Off Keying), PPM (Pulse Position Modulation), PAM (Pulse Amplitude Modulation), Bi-Phase method, etc. can be used. Examples of the main data include image data, audio data, and video data. Examples of the control signal include information related to automatic frequency control of the PLL circuit 126.

  That is, when main data is transmitted from the first housing K11 to the second housing K12, the local oscillator 105 generates a local clock and sends it to the PLL circuit 106. When receiving the local clock from the local oscillator 105, the PLL circuit 106 generates a carrier wave based on the local clock generated by the local oscillator 105, and outputs the carrier wave to the mixer 109b and the phase shifter 107. Here, when the phase shifter 107 receives the carrier wave from the PLL circuit 106, the phase shifter 107 shifts the phase of the carrier wave output from the PLL circuit 106 by π / 2 and outputs it to the mixer 109a.

The baseband unit 101a generates an in-phase component Q and a quadrature component I of the baseband signal, and outputs them to the mixers 109a and 109b via the low-pass filters 108a and 108b, respectively.
The mixer 109a then mixes the in-phase component Q of the baseband signal with the carrier wave whose phase is shifted by π / 2 sent from the phase shifter 107, and the phase of the in-phase component Q of the baseband signal is π Superposed on the carrier wave shifted by / 2. The mixer 109b mixes the orthogonal component I of the baseband signal and the carrier wave sent from the PLL circuit 106, and superimposes the orthogonal component I of the baseband signal on the carrier wave.

Then, when the in-phase component Q and the quadrature component I of the baseband signal are respectively superimposed on the carrier wave, they are transmitted via the internal radio transmission antenna 110. When transmission data is transmitted via the internal wireless transmission antenna 110, the transmission data is received via the internal wireless reception antenna 130.
The reception signal received via the internal radio reception antenna 130 is amplified by the low noise amplifier 113 after the unnecessary frequency components are attenuated by the band pass filter 131a, and sent to the mixers 129a and 129b. .

  The local oscillator 125 generates a local clock and sends it to the PLL circuit 126. When receiving the local clock from the local oscillator 125, the PLL circuit 126 generates a carrier wave based on the local clock generated by the local oscillator 125, and outputs the carrier wave to the mixer 129b and the phase shifter 127. Here, when the carrier wave is generated by the PLL circuit 126, the frequency of the carrier wave can be adjusted based on the control of the automatic frequency adjustment circuit 139 to optimize the frequency of the carrier wave. When the phase shifter 127 receives the carrier wave from the PLL circuit 126, the phase shifter 127 shifts the phase of the carrier wave output from the PLL circuit 126 by π / 2 and outputs it to the mixer 129a.

  Then, the mixer 129a mixes the received signal sent from the low noise amplifier 132 and the carrier wave whose phase is sent from the phase shifter 233 by shifting by π / 2, and down-converts the received signal. The in-phase component Q of the baseband signal is extracted. The mixer 129b extracts the quadrature component I of the baseband signal by mixing the reception signal sent from the low noise amplifier 132 and the carrier wave sent from the PLL circuit 126 and down-converting the reception signal. To do.

The in-phase component Q and the quadrature component I of the baseband signal output from the mixers 129a and 129b are attenuated by unnecessary frequency components by the low-pass filters 128a and 128b, respectively, and then passed through the buffers 133a and 133b, respectively. It is sent to the baseband unit 121a.
The baseband unit 121a can reproduce the image data by processing the in-phase component Q and the quadrature component I of the baseband signal, and can display the image data on the display body 123 via the control unit 122.

  On the other hand, when the control signal is transmitted from the second casing unit K12 to the first casing unit K11, the baseband unit 101a transmits the control signal to the exclusive OR circuit 137. The exclusive OR circuit 137 receives the pseudo random number generated by the pseudo random number generator 136 and takes an exclusive OR with the control signal output from the baseband unit 121a, thereby transmitting bits. The series of bits averages the array and outputs to the switch 135a. The pulse generated by the pulse generator 134 is input to the switch 135a (FIG. 5A), and the pulse output from the pulse generator 134 based on the output from the exclusive OR circuit 137. A control signal is transmitted through the internal wireless transmission antenna 138 while turning on / off the signal (FIG. 5B). When a control signal is transmitted via the internal wireless transmission antenna 138, the control signal is received via the internal wireless reception antenna 111.

  The received signal received via the internal radio receiving antenna 111 is amplified by the low noise amplifier 113 after being attenuated by the band pass filter 112 and then sent to the diode 114. Then, when the received signal is sent to the diode 114, the received signal is rectified by the diode 114 (FIG. 5C), and further integrated by the integrator 115 (FIG. 5D). Sent. The comparator 116 compares the level of the signal integrated by the integrator 115 with a specified value, and sends the comparison result to the exclusive OR circuit 117. The exclusive OR circuit 117 receives the pseudo random number generated by the pseudo random number generator 118, and the exclusive OR of the comparison result of the pseudo random number generated by the pseudo random number generator 118 and the comparator 116. , The control signal is restored and sent to the baseband unit 101a.

  Here, the carrier wave is transmitted while being modulated with the main data, and the control signal is transmitted while being directly modulated, so that it is not necessary to use a mixer or a low-pass filter in order to transmit and receive the control signal wirelessly. The circuit scale can be reduced, and the communication speed of the control signal can be reduced while securing the communication speed necessary for data transmission, so that power consumption can be reduced. Furthermore, on the transmission / reception side, switching is performed so that power is supplied to the related circuits only before and after the generation of the pulse, and thus power consumption can be further reduced.

  FIG. 6 is a diagram showing transmission timings of main data and control signals in the wireless communication apparatus of FIG. 4 in comparison with the conventional example. In FIG. 6A, the main data MD1 is transmitted from the first casing K11 to the second casing K12 by the BPSK method, and the control signal is transmitted from the second casing K12 to the first casing K11. The case where CS1 is transmitted by the QPSK system is shown. In FIG. 6B, the main data MD2 is transmitted from the first casing K11 to the second casing K12 by the QPSK method, and the control signal is transmitted from the second casing K12 to the first casing K11. The case where CS2 is transmitted by the UWB-IR system is shown.

  In FIG. 6A, when the control signal CS1 is transmitted by the QPSK method, the main data MD1 is intermittently transmitted in order to avoid interference between the main data MD1 and the control signal CS1, and the main data MD1 is idle. A control signal CS1 is transmitted. For this reason, when the control signal CS1 is transmitted by the QPSK method, if the communication speed is reduced in order to provide interference resistance to the communication of the control signal CS1, the occupied time that can be allocated to the communication of the main data MD1 is reduced. Decreases and throughput decreases.

  On the other hand, in FIG. 6B, when the control signal CS2 is transmitted by the UWB-IR method, the energy of the control signal CS2 can be concentrated in the amplitude direction in the time domain. In the UWB-IR method, the QPSK method is used. They give little interference to each other. For this reason, it becomes possible to transmit the control signal CS2 while continuously transmitting the main data MD2, and it becomes unnecessary to transmit the main data MD2 intermittently, thereby improving the transmission throughput of the main data MD2. be able to.

FIG. 7 is a diagram showing the spectrum distribution of main data and control signals in the wireless communication apparatus of FIG.
In FIG. 7, in the UWB-IR system, the energy of the control signal CS3 is spread over a wide band in the frequency domain, and the energy of the control signal CS3 can be concentrated in the amplitude direction in the time domain. On the other hand, in the QPSK system, the energy of the main data MD3 is concentrated in a narrow band in the frequency domain, and the energy of the in-data MD3 is diffused in the amplitude direction in the time domain. For this reason, by sending the control signal CS3 by the UWB-IR method, interference with the main data MD3 can be reduced as compared with the case where the control signal CS3 is sent by the QPSK method.

FIG. 8 is a diagram illustrating another example of transmission timings of main data and control signals in the wireless communication apparatus of FIG. In the example of FIG. 8, the main data MD4 is transmitted from the first housing unit K11 to the second housing unit K12 by the QPSK method, and the control signal CS4 is transmitted from the second housing unit K12 to the first housing unit K11. Is transmitted using the UWB-IR method.
In FIG. 8, dummy data DM is inserted into the main data MD4 in accordance with the transmission timing of the control signal CS4. And control signal CS4 can be transmitted according to the transmission timing of dummy data DM.

  Since this method does not require extra time for converging the unstable state due to on / off of the main data MD4, compared with the case of stopping the communication of the main data MD4, UWB-IR for the communication of the main data MD4. Even when the influence of communication interference of the control signal CS4 of the system becomes a problem, a decrease in throughput can be suppressed to a minimum without preventing the communication of the main data MD4.

FIG. 9 is a diagram illustrating a method of multiplexing main data and control signals in the wireless communication apparatus of FIG.
9A and 9B, the main data MD5 is transmitted from the first casing K11 to the second casing K12 by the QPSK method, and the first casing K12 transmits the first casing to the first casing. It is assumed that the control signal CS5 is transmitted to the body part K11 by the UWB-IR method. Here, it is assumed that the dummy bit section of FIG. 8 is inserted in the transmission of the main data MD5. In this case, as shown in FIG. 9C, the interference of the main data MD5 with respect to the control signal CS5 is reduced by matching the transmission timing of the control signal CS5 with the QPSK symbol change timing in the dummy bit section of the main data MD5. Can do.

  As a result, even when the influence of the main data MD5 on the control signal CS5 becomes a problem in the dummy bit section of the main data MD5, the amplitude of the QPSK signal becomes small at the timing of symbol change. Communication interference can be reduced. For example, by setting the dummy bit pattern to “11001100...” So that the transmission symbols are alternately reversed in phase, the amplitude of the QPSK signal can be reduced at the timing of symbol change and is superimposed on the main data MD5. Interference with the control signal CS5 can be reduced.

As a method of matching the change timing of symbols transmitted by the QPSK method with the transmission timing by the UWB-IR method,
(1) The delay difference between the reception signal based on the QPSK method and the transmission signal based on the UWB-IR method is detected on the second housing unit K12 side, and the delay of the UWB-IR transmission signal is detected on the second housing unit K12 side. Control method,
(2) The timing of the reception signal based on the UWB-IR method and the timing of the transmission signal based on the QPSK method are compared on the first housing unit K11 side, and information on the delay difference between these signals is transmitted via the communication based on the QPSK method. A method of controlling the delay of the transmission signal of the UWB-IR system on the second housing unit K12 side,
(3) Comparing the timing of the reception signal based on the UWB-IR method and the timing of the transmission signal based on the QPSK method on the first housing unit K11 side, and delaying the transmission signal based on the QPSK method based on the information of the delay difference between these signals And a method for controlling the above.

  The method (1) is effective for quasi-fixed communication in which the delay of the circuit and the propagation delay of the communication path can be regarded as almost constant. The methods (2) and (3) are effective when the circuit delay and the propagation delay of the communication path vary greatly. Further, in the methods (2) and (3), the transmission by the QPSK method is stopped and the signal by the UWB-IR method is temporarily received, so that the communication interference of the main data MD5 is eliminated. It is also possible to employ a technique of training optimal transmission timing by the UWB-IR method.

FIG. 10 is a block diagram showing a schematic configuration of a wireless communication apparatus according to the second embodiment of the present invention.
In FIG. 10, the wireless communication device is provided with a first housing part K21 and a second housing part K22. In the first housing part K21, the PLL circuit 106 of the first housing part K11 in FIG. The baseband unit 101b adjusts the frequency of the generated carrier wave. Further, in the second casing K22, the automatic frequency adjustment circuit 139 is removed from the second casing K12 of FIG. 4, and the frequency of the carrier wave generated by the PLL circuit 126 is adjusted by the baseband unit 121b. In addition, a switch 135b for switching a signal output to the low noise amplifier 132 to the band pass filter 131a side or the PLL circuit 126 side is provided.

  When main data is transmitted from the first housing K21 to the second housing K22, the switch 135b is connected to the PLL circuit 126 on the second housing K22 side, and the frequency of the PLL circuit 126 is swept. Then, the optimum carrier frequency including variations of the low noise amplifier 132 and the like is searched. When the optimum carrier frequency is searched, the frequency of the PLL circuit 126 is fixed to the searched frequency, and the switch 135b is returned to the bandpass filter 131a side.

  Next, the baseband unit 121b outputs the data related to the optimum carrier frequency to the exclusive OR circuit 137 as a control signal, while turning on / off the pulse output from the pulse generator 134 with the control signal. It is emitted as a radio wave via the wireless transmission antenna 138. When a control signal is transmitted via the internal wireless transmission antenna 138, the control signal is received via the internal wireless reception antenna 111. Then, after the control signal received by the internal radio reception antenna 111 is restored via the bandpass filter 112, the low noise amplifier 113, the diode 114, the integrator 115, the comparator 116, and the exclusive OR circuit 117, It is sent to the baseband unit 101b. Then, the baseband unit 101b can match the carrier frequency of the PLL circuit 106 with the carrier frequency of the PLL circuit 126 based on the data related to the optimum carrier frequency sent from the second casing unit K22.

  This makes it possible to share information for correcting a carrier frequency shift between transmission and reception. For this reason, even when the carrier frequency between transmission and reception does not match in the initial state due to various variations, it is possible to quickly match the carrier frequency between transmission and reception without reproducing and following the carrier on the receiving side, Wireless communication using carrier wave modulation can be stably performed while suppressing an increase in circuit scale.

  In particular, even when the variation in the carrier frequency of the PLL circuits 106 and 126 is large, the influence of the initial deviation of the carrier frequency can be solved, and the time required for carrier tracking can be reduced. It is possible to use inexpensive parts with low frequency accuracy for 125. Further, since it becomes possible to match the carrier frequency on the transmission side with the carrier frequency on the reception side, it is not necessary to match the carrier frequency on the reception side with the carrier frequency on the transmission side. Even when the center frequency of 132 is greatly affected by the variation, it is possible to set the optimum carrier frequency in consideration of the variation of the low noise amplifier 132.

  In the embodiment of FIG. 10, the method for transmitting the data related to the optimum carrier frequency from the second casing unit K22 to the first casing unit K21 by the UWB-IR method has been described. However, the second casing unit K22 is described. The carrier deviation may be detected on the receiving side of the QPSK method, and information relating to the carrier deviation may be sent to the first casing K21 by the UWB-IR method. Also, the control is performed by sequentially sending a control signal relating to frequency up / down to the first casing K21 by the UWB-IR scheme according to the carrier deviation detected on the receiving side of the second casing K22 by the QPSK scheme. Alternatively, the carrier frequency may be followed.

FIG. 11 is a block diagram showing a schematic configuration of a wireless communication apparatus according to the third embodiment of the present invention.
In FIG. 11, the wireless communication device is provided with a first casing K31 and a second casing K32. In the first casing K31, the local oscillator 105 of the first casing K11 in FIG. 4 is removed. In addition, an output from the exclusive OR circuit 117 is input as a reference clock for the PLL circuit 106. In the second casing K32, the automatic frequency adjustment circuit 139 is removed from the second casing K12 of FIG. 4 and the local clock generated by the local oscillator 125 is input to the pulse generator 134. The pulse is generated in synchronization with the local clock generated by the local oscillator 125. Here, the PLL circuit 106 is provided with a phase comparator 106a, a voltage controlled oscillator 106b, and a frequency divider 106c.

  The local clock generated by the local oscillator 125 is also input to the pulse generator 134 together with the PLL circuit 126, and the pulse generator 134 generates a pulse in synchronization with the local clock generated by the local oscillator 125. Generate. Based on the output from the exclusive OR circuit 137, the control signal is transmitted through the internal radio transmission antenna 138 while the pulse output from the pulse generator 134 is turned on / off. When a control signal is transmitted via the internal wireless transmission antenna 138, the control signal is received via the internal wireless reception antenna 111.

  When the control signal is received by the internal radio reception antenna 111, the reference clock is restored via the bandpass filter 112, the low noise amplifier 113, the diode 114, the integrator 115, the comparator 116, and the exclusive OR circuit 117. Is sent to the PLL circuit 106. When the reference clock is input to the PLL circuit 106, a carrier wave obtained by multiplying the frequency of the reference clock is generated. Here, in the PLL circuit 106, the phase of the signal obtained by dividing the carrier by the frequency divider 106c and the phase of the reference clock are compared by the phase comparator 106a, and control is performed so that the phase difference between these signals is eliminated. A voltage is generated. The control voltage is input to the voltage controlled oscillator 106b. Then, by controlling the oscillation frequency of the voltage controlled oscillator 106b using this control voltage, the phase of the carrier clock divided signal and the reference clock are synchronized.

  Thus, the same local clock generated by the local oscillator 125 can be used as a reference clock for the PLL circuits 106 and 126 on the transmission / reception side. Therefore, wireless communication using carrier wave modulation is performed between the first housing unit K31 and the second housing unit K32 without providing a local oscillator for generating a transmission-side carrier wave in the first housing unit K31. And the frequency deviation between transmission and reception can be reduced. For this reason, it is possible to stably perform wireless communication using carrier wave modulation while suppressing an increase in circuit scale.

FIG. 12 is a block diagram showing a schematic configuration of a wireless communication apparatus according to the fourth embodiment of the present invention.
In FIG. 12, the wireless communication device is provided with a first housing part K41 and a second housing part K42. In the first housing part K41, the local oscillator 105 of the first housing part K11 in FIG. 4 is removed. In addition, an output from the exclusive OR circuit 117 is input as a reference clock for the PLL circuit 106. In addition, the baseband unit 101b adjusts the frequency of the carrier wave generated by the PLL circuit 106 of the first housing unit K11 in FIG. In the second casing K42, the automatic frequency adjustment circuit 139 is removed from the second casing K12 of FIG. 4 and the local clock generated by the local oscillator 125 is input to the pulse generator 134. The pulse is generated in synchronization with the local clock generated by the local oscillator 125. In addition, a switch 135b for switching a signal output to the low noise amplifier 132 to the band pass filter 131a side or the PLL circuit 126 side is provided.

  When main data is transmitted from the first housing K41 to the second housing K42, the switch 135b is connected to the PLL circuit 126 on the second housing K42 side, and the frequency of the PLL circuit 126 is swept. Then, the optimum carrier frequency including variations of the low noise amplifier 132 and the like is searched. When the optimum carrier frequency is searched, the frequency of the PLL circuit 126 is fixed to the searched frequency, and the switch 135b is returned to the bandpass filter 131a side.

  The local clock generated by the local oscillator 125 is also input to the pulse generator 134 together with the PLL circuit 125. The pulse generator 134 generates a pulse in synchronization with the local clock generated by the local oscillator 125. Generate. In addition, the baseband unit 121b outputs data related to the optimum carrier frequency to the exclusive OR circuit 137 as a control signal, and turns on / off the pulse output from the pulse generator 134 with the control signal while It is emitted as a radio wave via the transmitting antenna 138. When a control signal is transmitted via the internal wireless transmission antenna 138, the control signal is received via the internal wireless reception antenna 111.

  When the control signal is received by the internal radio reception antenna 111, the reference clock is restored via the bandpass filter 112, the low noise amplifier 113, the diode 114, the integrator 115, the comparator 116, and the exclusive OR circuit 117. Is sent to the PLL circuit 106. When the reference clock is input to the PLL circuit 106, a carrier wave obtained by multiplying the frequency of the reference clock is generated. Here, in the PLL circuit 106, the phase of the signal obtained by dividing the carrier by the frequency divider 106c and the phase of the reference clock are compared by the phase comparator 106a, and control is performed so that the phase difference between these signals is eliminated. A voltage is generated. The control voltage is input to the voltage controlled oscillator 106b. Then, by controlling the oscillation frequency of the voltage controlled oscillator 106b using this control voltage, the phase of the carrier clock divided signal and the reference clock are synchronized.

  The control signal received by the internal radio reception antenna 111 is restored via the bandpass filter 112, the low noise amplifier 113, the diode 114, the integrator 115, the comparator 116, and the exclusive OR circuit 117, and the baseband Sent to the unit 101a. Then, the baseband unit 101b can match the carrier frequency of the PLL circuit 106 with the carrier frequency of the PLL circuit 126 based on the data related to the optimal carrier frequency sent from the second casing unit K42.

  As a result, the same local clock generated by the local oscillator 125 can be used as the reference clock for the PLL circuits 106 and 126 on the transmission / reception side, and information for correcting the deviation of the carrier frequency between transmission and reception Can be shared, and wireless communication using carrier wave modulation can be stably performed while suppressing an increase in circuit scale.

The perspective view which shows a state when the clamshell type mobile telephone to which the radio | wireless communication control method of this invention is applied is opened. The perspective view which shows a state when the clamshell type mobile telephone to which the radio | wireless communication control method of this invention is applied is closed. The perspective view which shows the external appearance of the rotary mobile telephone to which the radio | wireless communication control method of this invention is applied. 1 is a block diagram showing a configuration of a wireless communication device according to a first embodiment of the present invention. The figure which shows the waveform of each part processed with the radio | wireless communication apparatus of FIG. The figure which shows the transmission timing of main data and a control signal compared with a prior art example. The figure which shows the spectrum distribution of main data and a control signal. The figure which shows the other example of the transmission timing of main data and a control signal. The figure which shows the multiplexing method of main data and a control signal. The block diagram which shows the structure of the radio | wireless communication apparatus which concerns on 2nd Embodiment of this invention. The block diagram which shows the structure of the radio | wireless communication apparatus which concerns on 3rd Embodiment of this invention. The block diagram which shows the structure of the radio | wireless communication apparatus which concerns on 4th Embodiment of this invention.

Explanation of symbols

  1, 21, K11, K21, K31, K41 1st housing part, 2, 22, K12, K22, K32, K42 2nd housing part, 3, 23 Hinge, 4, 24 Operation buttons, 5, 25 Microphone, 6, 26 Antenna for external wireless communication, 7, 10, 27, 30110, 111, 130, 138 Antenna for internal wireless transmission, 8, 11, 28, 123 Display, 9, 29 Speaker, 12 Image sensor, 101a, 101b 121a, 121b Baseband unit, 102, 122 control unit, 103 ROM, 104, 124 RAM, 105, 125 Local oscillator, 106, 108a, 108b, 126, 128a, 128b PLL circuit, 107, 127 Phase shifter, 108a 108b, 128a, 128b Low-pass filter, 109a, 109b, 129a, 129 Mixer, 112, 131a, 131b Band pass filter, 113, 132 Low noise amplifier, 114 Diode, 115 Integrator, 116 Comparator, 117, 137 Exclusive OR circuit, 133a, 133b Buffer, 134 Pulse generator, 135a, 135b Switch 118, 136 Pseudo random number generator 139 Frequency automatic adjustment circuit

Claims (9)

A first wireless communication unit that performs wireless communication while modulating a carrier wave with data;
A wireless communication apparatus comprising: a second wireless communication unit that performs wireless communication while directly modulating a control signal used for control or processing of the data. The modulation method using BPSK, QPSK, 64QAM or 256QAM is used in the first wireless communication unit, and the modulation method using UWB-IR is used in the second wireless communication unit. The wireless communication device according to 1.   The radio communication apparatus according to claim 1, wherein the second radio communication unit transmits a control signal in accordance with a timing of a change of a symbol transmitted from the first radio communication unit. A first wireless transmission unit that performs wireless transmission while modulating a carrier wave with data;
A first wireless receiver for receiving data transmitted from the first wireless transmitter;
A second wireless transmission unit that performs wireless transmission while directly modulating a control signal used for control or processing of the data;
A wireless communication apparatus comprising: a second wireless reception unit that receives a control signal transmitted from the second wireless transmission unit. The second wireless transmission unit sends information on a carrier frequency when data is received by the first wireless reception unit to the second wireless reception unit,
5. The first wireless transmission unit adjusts a carrier frequency when modulating the carrier wave with data based on information on the carrier frequency received by the second wireless reception unit. The wireless communication device described. A first wireless transmission unit that performs wireless transmission while modulating a carrier wave with data;
A first wireless receiver for receiving data transmitted from the first wireless transmitter;
A second wireless transmission unit for performing wireless transmission while directly modulating a control signal used for control or processing of the data at a timing synchronized with a reference clock;
A second wireless receiver that receives a control signal transmitted from the second wireless transmitter;
The wireless communication apparatus, wherein the first wireless transmission unit generates the carrier according to a reference clock regenerated based on a reception waveform of the control signal. A first housing part;
A second casing connected to the first casing;
A connecting portion that connects the first housing portion and the second housing portion so as to change a positional relationship between the first housing portion and the second housing portion;
An external wireless communication unit mounted on the first housing unit for performing external wireless communication;
A display unit mounted on the second housing unit;
A first wireless transmission unit mounted on the first housing unit for performing wireless transmission while modulating a carrier wave with data;
A first wireless receiving unit mounted on the second housing unit for receiving data transmitted from the first wireless transmitting unit;
A second wireless transmission unit that is mounted on the second casing unit and performs wireless transmission while directly modulating a control signal used for control or processing of the data;
A wireless communication apparatus, comprising: a second wireless reception unit that is mounted on the first housing unit and receives a control signal transmitted from the second wireless transmission unit. First and second circuit blocks formed on the same semiconductor chip;
A first wireless transmission unit formed in the first circuit block for performing wireless transmission while modulating a carrier wave with data;
A first wireless receiver formed in the second circuit block for receiving data transmitted from the first wireless transmitter;
A second wireless transmission unit that performs wireless transmission while directly modulating a control signal that is formed in the second circuit block and is used for control or processing of the data;
A wireless communication apparatus comprising: a second wireless reception unit that is formed in the first circuit block and receives a control signal transmitted from the second wireless transmission unit. First and second semiconductor chips mounted on a mounting substrate;
A first wireless transmission unit formed on the first semiconductor chip for performing wireless transmission while modulating a carrier wave with data;
A first wireless receiving unit formed on the second semiconductor chip for receiving data transmitted from the first wireless transmitting unit;
A second wireless transmission unit that performs wireless transmission while directly modulating a control signal formed in the second semiconductor chip and used for controlling or processing the data;
A wireless communication apparatus comprising: a second wireless reception unit that is formed on the first semiconductor chip and receives a control signal transmitted from the second wireless transmission unit.

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