JP2007251786A - Radio communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain an excellent radio communication status and to attain power saving and small-sizing. <P>SOLUTION: A radio communication apparatus includes: a time-division type high frequency circuit corresponding to a time-division type radio communication system which alternately switches transmission and reception in each predetermined timing; main and sub continuation type high frequency circuits 8, 9 corresponding to a continuation type radio communication system which continuously performs transmission or reception or transmission/reception; a multi-type antenna 2 capable of corresponding to the time-division type and continuation type radio communication systems; a single-type antenna 3 corresponding to the continuation type radio communication system; switch sections 4, 5, 6 for switching statuses of connections between the high frequency circuits 7, 8, 9 and the antennas 2, 3; and a switch control section 42 for performing switching control of the switch sections 4, 5, 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication device such as a mobile (portable) wireless communication device.

  There are various types of wireless communication systems. For example, in a W-CDMA (Wideband-Code-Division-Multiple-Access) wireless communication system which is one of wireless communication systems, transmission, reception, or transmission / reception is continuously performed. Do. In a GSM (Global-System-for-Mobile-communication) wireless communication system, which is another wireless communication system, transmission and reception are switched at predetermined timings.

JP 2001-24579 A

  By the way, when the wireless communication state is deteriorated during wireless communication by W-CDMA, the diversity wireless communication operation may be performed to improve the wireless communication state. In order to use this improvement method, for example, a wireless communication device is provided with a plurality of radio communication high-frequency circuits corresponding to W-CDMA and a plurality of antennas individually corresponding to each radio communication high-frequency circuit. It is done.

  Also, in a wireless communication apparatus capable of both W-CDMA and GSM wireless communication, if the wireless communication state in W-CDMA deteriorates, it is determined whether the wireless communication state can be improved by wireless communication in GSM. For example, the area where the wireless communication device is located is an overlap area between an area where wireless communication with W-CDMA is possible and an area where wireless communication with GSM is possible. When a good wireless communication state can be obtained, the wireless communication state may be improved by switching from W-CDMA to GSM. In order to use this improvement technique, for example, the wireless communication device individually corresponds to the radio communication high-frequency circuit for W-CDMA, the radio communication high-frequency circuit for GSM, and each radio communication high-frequency circuit. And a plurality of antennas.

  By the way, in a wireless communication device, particularly a portable wireless communication device such as a mobile phone, there is a demand for miniaturization and power saving, as well as a requirement for comfortable wireless communication.

  An object of the present invention is to provide a wireless communication apparatus that can improve the reliability of wireless communication and can achieve power saving and downsizing.

In order to achieve the above object, the present invention has the following configuration as means for solving the above problems. That is, the wireless communication device of the present invention
A time-division type high-frequency circuit corresponding to a time-division type radio communication system that switches between transmission and reception alternately at predetermined timings;
High frequency circuit for each of the main and sub continuous types corresponding to a continuous type wireless communication system that continuously performs transmission or reception or transmission and reception;
A multi-type antenna capable of supporting time-division type and continuous type wireless communication systems;
A single-type antenna corresponding to a continuous-type wireless communication system;
A main continuous type switch for switching the main continuous type high-frequency circuit to either the multi-type antenna side or the single type antenna side; and
Either the multi-type antenna is connected to the time division type high frequency circuit or the main continuous type high frequency circuit connected to the main continuous type high frequency circuit via the main continuous type switch circuit A switch section for a multi-type antenna for switching;
The connection state of either the state where the single type antenna is connected to the main continuous type high frequency circuit via the main continuous type switch section or the state where it is connected to the sub continuous type high frequency circuit Switch for single type antenna to switch to,
When performing diversity wireless communication using the main and sub continuous type high frequency circuits, the main continuous type high frequency circuit is connected to the multi-type antenna, and the sub continuous type high frequency circuit is connected to the single type antenna. When performing time division type wireless communication while performing switching control of the switch part, the main continuous type high frequency circuit is connected to a single type antenna, and the time division type high frequency circuit is multi-type. A switch control unit that performs switching control of each of the switch units to be connected to the antenna,
It is characterized by being provided.

  According to the present invention, the main and sub continuous type high frequency circuits corresponding to the continuous type radio communication system such as W-CDMA are provided, and can be connected to the main and sub continuous type high frequency circuits, respectively. Since two antennas are provided, it is possible to perform diversity wireless communication using the main and sub continuous type high-frequency circuits. Thereby, for example, when the state of wireless communication by either the main or sub continuous type high-frequency circuit deteriorates, the wireless communication state can be improved by diversity wireless communication.

  In the present invention, one of the two antennas is not only a continuous type but also a multi-type antenna that can support a time-division type wireless communication system such as GSM, for example. A single type antenna corresponding to a continuous type wireless communication system was adopted. Furthermore, a high frequency circuit for time division type is provided, and the high frequency circuit for time division type can be connected to the multi-type antenna. By connecting a multi-type antenna with a time-division type high-frequency circuit and a single-type antenna with a main continuous-type high-frequency circuit, respectively, a time-division type wireless communication is performed while performing continuous-type wireless communication. Can be performed. Thereby, in the configuration of the present invention, for example, when the continuous type wireless communication state deteriorates, it becomes possible to perform time-division type wireless communication on a trial basis while performing continuous type wireless communication. Then, determine whether the time-division type wireless communication state is good or not, and when it is determined that the time-division type wireless communication state is good, improve the wireless communication state by switching from the continuous type to the time-division type. Can do.

  Since it is possible to improve the wireless communication state by diversity wireless communication as described above and the wireless communication state by switching from the continuous type to the time division type, it is easy to maintain a good wireless communication state, Thereby, the reliability of the radio | wireless communication with respect to the radio | wireless communication apparatus of this invention can be improved.

  In addition, as described above, the wireless communication apparatus of the present invention can perform diversity wireless communication using the main and sub continuous type high-frequency circuits. From this, for example, by performing diversity wireless communication of W-CDMA HSDPA (High-Speed-Downlink-Packet-Access), which is one of the continuous types, the throughput is greatly improved when the wireless communication state is good. Can be achieved.

  Furthermore, in the present invention, one of the antennas is a multi-type antenna capable of supporting both a continuous type and a time division type radio communication system, and the multi type antenna includes a time division type high frequency circuit, A switch unit for switching to a state where one of the main continuous type high-frequency circuits is connected is provided. In addition, the single type antenna is provided with a switch unit for switching to a state in which either the main continuous type high frequency circuit or the sub continuous type high frequency circuit is connected. In other words, in this invention, the multi-type antenna is used as an antenna for both the time-division type high-frequency circuit and the continuous-type high-frequency circuit, and the single-type antenna is used for both the main and sub continuous-type high-frequency circuits. It consists of an antenna. This eliminates the need to provide three antennas individually corresponding to the main continuous-type high-frequency circuit, the sub-continuous-type high-frequency circuit, and the time-division-type high-frequency circuit. Can be made smaller than the number of high-frequency circuits. For this reason, the size of the wireless communication device can be reduced.

  Furthermore, the main continuous type switch unit and the single type antenna switch unit are each formed by an SPDT (Single-Pole-Double-Throw) switch, thereby reducing the power consumption of the wireless communication device. Can be achieved. That is, the SPDT switch has less conduction loss than other switches. For this reason, for example, when performing wireless communication using the main continuous type high frequency circuit, the main continuous type high frequency circuit is connected to the single continuous type switch unit and the single type antenna switch unit. By connecting to the type antenna, the main continuous type high-frequency circuit is connected to the multi-type antenna via the main continuous type switch unit and the multi-type antenna switch unit having a configuration other than the SPDT switch. Compared to the case, the conduction loss between the main continuous-type high-frequency circuit and the antenna can be reduced. Thereby, the sensitivity of radio | wireless communication can be raised, the electric current amount required for radio | wireless communication can be decreased, and power saving can be achieved. For example, when the wireless communication device is driven using the power of the power battery, it is possible to suppress consumption of the power battery.

  In the case where the diversity stop control unit is provided, the diversity wireless communication state is determined by the diversity stop control unit based on any signal received by the main or sub continuous type high-frequency circuit during the diversity wireless communication. When it is determined that the diversity operating condition given in advance is not satisfied, the operation of the sub continuous type high frequency circuit can be stopped. In other words, if the wireless communication state cannot be improved even after performing diversity wireless communication, the diversity wireless communication is useless, so the operation of the sub-continuous type high-frequency circuit is stopped and the diversity wireless communication is terminated. By doing so, power saving can be achieved.

  Embodiments according to the present invention will be described below with reference to the drawings.

  The wireless communication apparatus according to the first embodiment includes a GSM wireless communication system that is a time division type (that is, a type in which transmission and reception are alternately switched at predetermined timings) and a continuous type (that is, transmission or reception). Or a type in which transmission and reception are performed continuously) and a W-CDMA wireless communication system. As shown in FIG. 1, a wireless communication device 1 according to a first embodiment includes a multi-type antenna 2, a single-type antenna 3, an antenna switch 4 that is a multi-type antenna switch unit, and a single-type antenna. SPDT switch 5 which is a switch unit for main use, SPDT switch 6 which is a switch unit for main continuous type, high frequency circuit 7 for GSM which is a high frequency circuit for time division type, and main W- which is a high frequency circuit for main continuous type The CDMA high-frequency circuit 8 includes a sub-W-CDMA high-frequency circuit 9 that is a sub-continuous type high-frequency circuit, and a baseband processing unit 10.

  That is, the multi-type antenna 2 is compatible with both GSM and W-CDMA wireless communication systems. By the way, GSM has a plurality of modes. In the first embodiment, for example, a GSM850 mode, a GSM900 mode, a DCS (Digital-Celular-System) mode, and a PCS (Personal-Communication-System) are used. ) Mode, GSM wireless communication in four modes is possible. The frequency band of GSM850 wireless communication is about 850 MHz, and the frequency band of GSM900 wireless communication is about 900 MHz. The reception frequency band of DCS is about 1805 MHz to 1880 MHz, and the transmission frequency band of DCS is about 1710 MHz to 1785 MHz. The PCS reception frequency band is about 1900 MHz, and the PCS transmission frequency band is about 1800 MHz. The W-CDMA reception frequency band is about 2110 MHz to 2170 MHz, and the W-CDMA transmission frequency band is about 1920 MHz to 1980 MHz. In the first embodiment, the multi-type antenna 2 performs a wireless communication operation (resonant operation) in the GSM (GSM850, GSM900, DCS, PCS) and W-CDMA signal transmission / reception frequency bands as described above. It has the structure which can do.

  The single-type antenna 3 corresponds to a W-CDMA radio communication system, and has a configuration capable of performing a radio communication operation in the frequency band of W-CDMA signal transmission / reception as described above.

  The GSM high-frequency circuit 7 includes a GSM850 transmission circuit 12, a GSM900 transmission circuit 13, a DCS transmission circuit 14, a PCS transmission circuit 15, an amplifier 16, a GSM850 reception circuit 17, and a GSM900 reception. A circuit 18, a DCS reception circuit 19, a PCS reception circuit 20, a GSM850 reception filter 21, a GSM900 reception filter 22, a DCS reception filter 23, and a PCS reception filter 24. Has been.

  The transmission circuit 12 for GSM850, the transmission circuit 13 for GSM900, the transmission circuit 14 for DCS, and the transmission circuit 15 for PCS each have a predetermined GSM transmission signal output from the baseband processing unit 10. It has a circuit configuration for converting (modulating) it into a high-frequency signal for transmission in a mode (that is, GSM850 mode, GSM900 mode, DCS mode, or PCS mode). The amplifying unit 16 has a circuit configuration that amplifies and outputs the high-frequency signal for transmission output from each of the transmission circuits 12 to 15. In the first embodiment, the output paths of the signals respectively output from the GSM850 transmission circuit 12 and the GSM900 transmission circuit 13 are merged and input to the amplifying unit 16, and the GSM850 transmission circuit 12 And the output signal of the GSM 900 transmission circuit 13 are amplified by the amplification section 16 and output from the GSM high frequency circuit 7 as an L signal for transmission from the amplification section 16. The output paths of the signals output from the DCS transmission circuit 14 and the PCS transmission circuit 15 are combined and input to the amplifying unit 16, and the output signal of the DCS transmission circuit 14 and the DCS transmission circuit are combined. The output signal 14 is amplified by the amplifying unit 16 and output from the GSM high-frequency circuit 7 as an H signal for transmission from the amplifying unit 16.

  As described above, the frequency bands of received signals of GSM850, GSM900, DCS, and PCS are different from each other. The GSM850 reception filter 21, the GSM900 reception filter 22, the DCS reception filter 23, and the PCS reception filter 24 are respectively connected to the GSM high frequency circuit 7 by utilizing the difference in the frequency band of the reception signal. It has a configuration in which a reception signal in a predetermined mode (that is, a reception signal of GSM850, a reception signal of GSM900, a reception signal of DCS, or a reception signal of PCS) is selectively extracted from the input reception signal. It is composed of a band pass filter. The GSM850 reception circuit 17 receives the GSM850 reception signal extracted by the GSM850 reception filter 21, the GSM900 reception circuit 18 receives the GSM900 reception signal extracted by the GSM900 reception filter 22, and the DCS reception circuit. Reference numeral 19 denotes a DCS reception signal extracted by the DCS reception filter 23. Further, the PCS reception circuit 20 outputs a PCS reception signal extracted by the PCS reception filter 24 to the baseband processing unit 10, respectively. It has a circuit configuration for converting (demodulating) into a frequency signal.

  The main W-CDMA high-frequency circuit 8 is compatible with signal transmission / reception in W-CDMA, and includes a duplexer 26, a transmission side amplification unit 27, a transmission circuit 28, a reception side amplification unit 29, and a reception unit. The circuit 30 is configured. The transmission circuit 28 has a circuit configuration for converting (modulating) the transmission signal output from the baseband processing unit 10 into a high-frequency signal for transmission by W-CDMA. The transmission side amplification unit 27 has a circuit configuration for amplifying the transmission high frequency signal output from the transmission circuit 28. The diplexer 26 uses the difference between the transmission frequency band and the reception frequency band of the W-CDMA to output the signal output from the transmission side amplification unit 27 from the main W-CDMA high-frequency circuit 8, and for the main W-CDMA. It has a circuit configuration for controlling the conduction path between the transmission signal and the reception signal so that the reception signal input to the high frequency circuit 8 is supplied to the reception side amplification unit 29. The reception side amplification unit 29 has a circuit configuration for amplifying and outputting the reception signal applied from the duplexer 26. The reception circuit 30 has a circuit configuration for converting (demodulating) the reception signal output from the reception side amplification unit 29 into a frequency signal for the baseband processing unit 10.

  The sub W-CDMA high-frequency circuit 9 corresponds to reception of a signal by W-CDMA, and includes a W-CDMA reception filter 32, an amplification unit 33, and a reception circuit 34. Yes. The W-CDMA reception filter 32 has a circuit configuration for extracting a W-CDMA reception signal from a signal input to the sub W-CDMA high-frequency circuit 9, and is configured by, for example, a bandpass filter. The amplifying unit 33 has a circuit configuration for amplifying the W-CDMA reception signal extracted by the W-CDMA reception filter 32. The reception circuit 34 has a circuit configuration for converting (demodulating) the reception signal output from the amplification unit 33 into a frequency signal for the baseband processing unit 10.

  The antenna switch 4 has one of a state in which the multi-type antenna 2 is connected to the GSM high-frequency circuit 7 and a state in which the multi-type antenna 2 is connected to the main W-CDMA high-frequency circuit 8. It has a configuration for switching to a connected state. The antenna switch 4 is a multi-type one of the transmission system circuit unit composed of the component units 12 to 16 and the reception system circuit unit composed of the configuration units 17 to 24 constituting the GSM high-frequency circuit 7. It also has a configuration for switching connection to the antenna 2 side. Further, the antenna switch 4 has a configuration for switching and connecting any one of the group of the transmission circuits 12 and 13 of the transmission system circuit unit and the group of the transmission circuits 14 and 15 to the multi-type antenna 2 side. Also have. Furthermore, the antenna switch 4 also has a configuration for selectively switching and connecting any one of the reception circuits 17 to 20 of the reception system circuit unit to the multi-type antenna 2 side. For example, FIG. 2 shows a circuit configuration example of the antenna switch 4. The antenna switch 4 shown in FIG. 2 includes switch units 36 to 39. That is, the switch unit 36 is a switch for switching and connecting the multi-type antenna 2 to either the GSM high-frequency circuit 7 side or the main W-CDMA high-frequency circuit 8 side. The switch unit 37 is a switch for switching and connecting one of the transmission system circuit unit and the reception system circuit unit of the GSM high-frequency circuit 7 to the multi-type antenna 2 side. The switch unit 38 is a switch for selectively switching and connecting any one of the reception circuits 17 to 20 of the reception system circuit unit of the GSM high-frequency circuit 7 to the multi-type antenna 2 side. The switch unit 39 is configured to switch and connect one of the set of the transmission circuits 12 and 13 and the set of the transmission circuits 14 and 15 of the transmission system circuit unit of the GSM high-frequency circuit 7 to the multi-type antenna 2 side. It is a switch.

  The SPDT switch 5 includes a single type antenna 3 connected to the sub W-CDMA high frequency circuit 9 and a single type antenna 3 connected to the main W-CDMA high frequency circuit 8 via the SPDT switch 6. This is for switching to one of the connected states.

  In the SPDT switch 6, the main W-CDMA high frequency circuit 8 is connected to the multi-type antenna 2 via the antenna switch 4, and the main W-CDMA high frequency circuit 8 is single type via the SPDT switch 5. This is for switching to one of the connection states of the state connected to the antenna 3.

  In the first embodiment, the baseband processing unit 10 is provided with a switch control unit 42. The wireless communication device 1 of the first embodiment is provided with a control unit (not shown) that controls the operation of the wireless communication device 1. The switch control unit 42 has a configuration for performing switching control of all of the antenna switch 4 and the SPDT switches 5 and 6 in accordance with a command from the control unit. For example, when performing wireless communication using the main W-CDMA high-frequency circuit 8 alone, the switch control unit 42 connects the main W-CDMA high-frequency circuit 8 via the SPDT switches 5 and 6 as shown in FIG. The SPDT switches 5 and 6 are controlled to be connected to the single type antenna 3. In this way, the main W-CDMA high-frequency circuit 8 is connected to the single-type antenna 3 via the SPDT switches 5 and 6 to perform wireless communication, whereby the main W-CDMA high-frequency circuit 8 is connected to the SPDT switch 6. Compared with the case where the multi-type antenna 2 is connected via the antenna switch 4, the conduction loss between the main W-CDMA high-frequency circuit 8 and the antenna can be suppressed, and power saving can be achieved. . In addition, since the single type antenna 3 can easily obtain better wireless communication sensitivity than the multi type antenna 2, wireless communication with good sensitivity can be performed.

  The switch control unit 42 performs wireless communication using the GSM high-frequency circuit 7 while performing wireless communication using the main W-CDMA high-frequency circuit 8 (for example, during wireless communication using W-CDMA, a wireless communication state using GSM In order to test GSM wireless communication in order to determine the quality of the test), the main W-CDMA high-frequency circuit 8 is connected to the single type antenna 3 via the SPDT switches 5 and 6, and Switching control of the switches 4, 5, 6 is performed to connect the GSM high-frequency circuit 7 to the multi-type antenna 2 through the antenna switch 4.

  Further, when performing diversity wireless communication by the main W-CDMA high-frequency circuit 8 and the sub W-CDMA high-frequency circuit 9, the switch control unit 42, as shown in FIG. 3, shows the main W-CDMA high-frequency circuit. 8 is connected to the multi-type antenna 2 via the SPDT switch 6 and the antenna switch 4 and the sub-W-CDMA high-frequency circuit 9 is connected to the single-type antenna 3 via the SPDT switch 5. 5 and 6 are switched.

  Diversity wireless communication includes a plurality of methods as described below. For example, one method of diversity wireless communication is that a received signal supplied from the multi-type antenna 2 to the main W-CDMA high-frequency circuit 8 side and a single-type antenna 3 to the sub-W-CDMA high-frequency circuit 9 side. Each of the supplied reception signals is detected, and the S / N ratio, signal strength, etc. of these reception signals are compared. Based on the comparison, it is determined which of the wireless communication states by the multi-type antenna 2 and the wireless communication state by the single-type antenna 3 is good, and the good wireless communication state is determined. Wireless communication is performed using the antenna that can be obtained. Hereinafter, such diversity wireless communication is referred to as selective diversity.

  Another technique for diversity wireless communication is to combine a reception signal output from the main W-CDMA high-frequency circuit 8 and a reception signal output from the sub-W-CDMA high-frequency circuit 9 in advance. The signal is synthesized according to a technique to improve the S / N ratio and signal strength of the received signal. Hereinafter, such diversity wireless communication is referred to as combined diversity.

  As described above, there are a plurality of methods for diversity wireless communication, and in this first embodiment, any method of diversity wireless communication may be performed.

  The second embodiment will be described below. In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and duplicate descriptions of common portions are omitted.

  In the second embodiment, in addition to the configuration of the first embodiment, a diversity stop control unit 44 as shown by the dotted lines in FIGS. 1 and 3 is provided. The diversity stop control unit 44 detects that the wireless communication device 1 is performing diversity wireless communication by the main and sub W-CDMA high-frequency circuits 8 and 9 based on information from the control unit or the like of the wireless communication device 1. For example, it is determined whether or not the diversity wireless communication is effective as shown below, and when it is determined that the diversity wireless communication is not effective, the operation of the sub W-CDMA high-frequency circuit 9 is stopped. . For example, when selection-type diversity is adopted, the diversity stop control unit 44 receives a signal received by the sub W-CDMA high frequency circuit 9 from the sub W-CDMA high frequency circuit 9 or the baseband processing unit 10. Then, the detected intensity of the received signal and the S / N ratio are compared with a diversity necessity threshold value given in advance. Then, the diversity stop control unit 44 determines whether the strength of the received signal and the S / N ratio are better than the threshold value for determining necessity of diversity through the comparison, and when it is determined to be good, the diversity operation condition Therefore, it is determined that the diversity wireless communication is effective, and the diversity wireless communication is continued. Further, the diversity stop control unit 44 does not satisfy the diversity operating condition when it is determined that the strength of the received signal and the S / N ratio are not better than the threshold for determining necessity of diversity, and it is satisfactory even if diversity wireless communication is performed. It is determined that the wireless communication state cannot be obtained. In this case, the diversity stop control unit 44 stops the operation of the sub W-CDMA high frequency circuit 9 by stopping the power supply from the power source to the sub W-CDMA high frequency circuit 9, for example.

  In the case where the combination type diversity is adopted, the diversity stop control unit 44, for example, receives the reception signal of the sub W-CDMA high frequency circuit 9, or the main and sub W-CDMA high frequency circuits 8, 9, a combined signal of the received signals is detected, and the detected signal strength and S / N ratio are compared with a diversity necessity threshold. Then, as described above, the diversity stop control unit 44 determines whether or not the strength of the received signal and the S / N ratio are better than the threshold value for determining whether diversity is necessary or not by the comparison. Since diversity operating conditions are sometimes satisfied, diversity wireless communication is continued. Also, the diversity stop control unit 44 does not satisfy the diversity operation condition when it is determined that the strength of the received signal or the SN ratio is not better than the threshold value for determining whether or not diversity is required. It is determined that the wireless communication state cannot be obtained, and the operation of the sub W-CDMA high frequency circuit 9 is stopped.

  The wireless communication device 1 of the second embodiment is configured as described above. An operation example related to the diversity wireless communication of the wireless communication apparatus 1 of the second embodiment will be briefly described based on the flowchart of FIG. For example, during the diversity wireless communication, the diversity stop control unit 44 determines whether the diversity wireless communication is valid at a predetermined timing (step 101). When it is determined that the diversity wireless communication is valid, it is determined in step 102 that the diversity wireless communication is continued. At this time, the switches 4, 5, and 6 are in the switching state as shown in FIG. 1, and this switching state is continuously maintained. Thereafter, in step 103, for example, whether the wireless communication state has changed based on one or both of the reception signal of the main W-CDMA high-frequency circuit 8 and the reception signal of the sub-W-CDMA high-frequency circuit 9 Judging. When it is determined that the wireless communication state has not changed or the change is within the allowable range, it is determined in step 102 that the diversity wireless communication is continued, and the switching state of the switches 4, 5, 6 is continued as it is. Is done.

  If it is determined in step 103 that the wireless communication state has changed beyond the allowable range, the operations in and after step 101 are repeated. When the diversity stop control unit 44 determines in step 101 that the diversity wireless communication is not effective, it is determined in step 104 that a good wireless communication state cannot be obtained even if the diversity wireless communication is continued. Then, the diversity stop control unit 44 stops the operation of the sub W-CDMA high-frequency circuit 9. Then, the switch control unit 42 switches and controls the switches 4, 5, and 6 as shown in FIG. 3 so as to perform wireless communication by the main W-CDMA high frequency circuit 8 alone. Thereafter, in step 105, it is determined whether or not the wireless communication state has changed based on the received signal of the main W-CDMA high frequency circuit 8. When it is determined that the wireless communication state has not changed or the change is within the allowable range, the wireless communication of the main W-CDMA high-frequency circuit 8 alone is performed while the diversity wireless communication is continuously stopped in step 104. The switch 4, 5, 6 is switched as it is. Further, when it is determined at step 105 that the wireless communication state has changed beyond the allowable range, the operation after step 101 is repeated. For example, when it is determined at step 101 that the diversity wireless communication is valid, Diversity wireless communication by the main and sub W-CDMA high-frequency circuits 8 and 9 is resumed.

  Note that such an operation of the wireless communication apparatus 1 is an example, and the wireless communication apparatus 1 can take other operations as a matter of course.

  The present invention is not limited to the first and second embodiments, and various embodiments can be adopted. For example, in each of the first and second embodiments, the sub-W-CDMA high-frequency circuit 9 has a circuit configuration that performs only reception, but may have a circuit configuration that can transmit and receive as necessary. However, a circuit configuration that performs only transmission may be used. The main W-CDMA high-frequency circuit 8 can transmit and receive, but may perform only one of transmission and reception.

  Furthermore, in each of the first and second embodiments, the switch control unit 42 is built in the baseband processing unit 10, but the switch control unit 42 is provided independently outside the baseband processing unit 10. Alternatively, the switch control unit 42 may be built in the control unit of the wireless communication device 1. Similarly, with respect to the diversity stop control unit 44 shown in the second embodiment, the diversity stop control unit 44 is built in the baseband processing unit 10, but the diversity stop control unit 44 is included in the baseband processing unit 10. It may be provided outside alone, or may be built in the control unit of the wireless communication device 1.

  Furthermore, when the diversity stop control unit 44 shown in the second embodiment determines that the diversity wireless communication state does not satisfy a predetermined diversity operation condition during diversity wireless communication, the sub-W-CDMA use Although the configuration is such that the operation of the high-frequency circuit 9 is stopped, for example, when the sub W-CDMA high-frequency circuit 9 has a circuit configuration capable of transmitting and receiving, the diversity stop control unit 44 performs the diversity wireless communication. In the meantime, the operation of the main W-CDMA high-frequency circuit 8 may be stopped when it is determined that the diversity wireless communication state does not satisfy a predetermined diversity operation condition. Furthermore, in the second embodiment, the diversity operation condition is that the S / N ratio and the strength of the received signal are better than the threshold for determining necessity of diversity, but other conditions may be used as the diversity operation condition. Furthermore, the diversity stop control unit 44 shown in the second embodiment is configured to receive a diversity wireless communication state in advance based on a signal received by the sub-W-CDMA high-frequency circuit 9 during diversity wireless communication. Although it has been determined whether or not the operating condition is satisfied, it is determined whether or not the diversity wireless communication state satisfies a diversity operating condition given in advance based on a signal received by the main W-CDMA high frequency circuit 8. The diversity wireless communication state is given in advance based on both the received signal of the signal received by the main W-CDMA high-frequency circuit 8 and the signal received by the sub-W-CDMA high-frequency circuit 9. It may be determined whether or not a diversity operating condition is satisfied.

  Furthermore, in each of the first and second embodiments, the single type antenna switch unit 5 and the main continuous type switch unit 6 are each constituted by an SPDT switch. One or both of the switch unit 5 and the main continuous type switch unit 6 may be configured by a switch other than the SPDT switch. In each of the first and second embodiments, GSM is given as an example of the time division type, and W-CDMA is given as an example of the continuous type. Of course, the present invention is time division other than GSM. The present invention can also be applied to a wireless communication apparatus that can handle a type of wireless communication system and a wireless communication apparatus that can support a continuous type wireless communication system other than W-CDMA.

It is a figure for demonstrating one Embodiment of the radio | wireless communication apparatus which concerns on this invention. It is a circuit diagram for demonstrating the example of 1 circuit structure of an antenna switch. It is a figure for demonstrating the example of a switching state of the switch part in the radio | wireless communication apparatus of the example of an embodiment. It is a flowchart for demonstrating one operation example of the radio | wireless communication apparatus of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wireless communication apparatus 2 Multi-type antenna 3 Single-type antenna 4 Antenna switch 5,6 SPDT switch 7 GSM high frequency circuit 8 Main W-CDMA high frequency circuit 9 Sub W-CDMA high frequency circuit 42 Switch control unit 44 Diversity stop Control unit

Claims (3)

A time-division type high-frequency circuit corresponding to a time-division type radio communication system that switches between transmission and reception alternately at predetermined timings;
High frequency circuit for each of the main and sub continuous types corresponding to a continuous type wireless communication system that continuously performs transmission or reception or transmission and reception;
A multi-type antenna capable of supporting time-division type and continuous type wireless communication systems;
A single-type antenna corresponding to a continuous-type wireless communication system;
A main continuous type switch for switching the main continuous type high-frequency circuit to either the multi-type antenna side or the single type antenna side; and
Either the multi-type antenna is connected to the time division type high frequency circuit or the main continuous type high frequency circuit connected to the main continuous type high frequency circuit via the main continuous type switch circuit A switch section for a multi-type antenna for switching;
The connection state of either the state where the single type antenna is connected to the main continuous type high frequency circuit via the main continuous type switch section or the state where it is connected to the sub continuous type high frequency circuit Switch for single type antenna to switch to,
When performing diversity wireless communication using the main and sub continuous type high frequency circuits, the main continuous type high frequency circuit is connected to the multi-type antenna, and the sub continuous type high frequency circuit is connected to the single type antenna. When performing time division type wireless communication while performing switching control of the switch part, the main continuous type high frequency circuit is connected to a single type antenna, and the time division type high frequency circuit is multi-type. A switch control unit that performs switching control of each of the switch units to be connected to the antenna,
A wireless communication apparatus comprising:   2. The wireless communication apparatus according to claim 1, wherein the main continuous type switch unit and the single type antenna switch unit are configured by SPDT switches.   The diversity operation condition in which the diversity wireless communication state is given in advance based on any signal received by the main or sub continuous type high frequency circuit during the diversity wireless communication by the main and sub continuous type high frequency circuit. 3. The radio communication apparatus according to claim 1, further comprising a diversity stop control unit that stops the operation of the sub continuous type high-frequency circuit when it is determined that the condition is not satisfied.

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