JP2011119891A - Diversity wireless device and rfic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diversity wireless device that reduces development man-hours of an RFIC. <P>SOLUTION: The diversity wireless device is configured as follows. Each wireless part 10, 20 is respectively provided with each RFIC 30A, 30B mutually having the same circuit configuration. Each RFIC 30A, 30B includes an RF-signal processing circuit 35 for executing RF-signal processing in either one of modes of a primary system and a diversity system on the basis of the input logic level of an inputted operation-mode selection signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a radio communication technique, and more particularly to a circuit configuration technique used in a diversity radio.

  A radio device such as a mobile phone device has a diversity reception function in order to improve the reception quality of radio waves from a base station. With the diversity reception function, for the same radio signal received by multiple different antennas, the antenna signal with excellent radio wave condition is used preferentially, or the received signal is synthesized to remove noise, This is a technology for improving reception quality and reliability.

In such a diversity radio, one antenna is used as a primary system that is shared with a transmission system by a transmission / reception switch, and the other antenna is a diversity system dedicated to a reception system. These primary system and diversity system There are receiver circuits that perform RF signal processing for each of these, and the output from these receiver circuits is demodulated by a demodulator (see, for example, Patent Document 1).
This realizes a function of switching and controlling a primary operation (non-diversity operation) received using only the primary system and a diversity operation received using both the primary system and the diversity system in accordance with the reception status.

  As a related technology of such a diversity radio, each RF reception processing unit connected to two different antennas is mounted on one RFIC, and control data is set from a CPU in a register provided in the RFIC, There has been proposed a technique for switching and controlling the RF reception processing unit between a primary system and a diversity system (see, for example, Patent Document 2).

JP 2001-251241 A JP 2007-258847 A

However, in such a related technique, since the primary and diversity RF signal processing circuits are mounted on one RFIC, the circuit configuration inside the RFIC becomes larger and more complicated, so circuit evaluation, etc. There was a problem that the number of development man-hours increased.
The present invention has been made to solve such problems, and an object of the present invention is to provide a diversity radio circuit technology capable of reducing the number of RFIC development steps.

  In order to achieve such an object, a diversity radio according to the present invention includes a first radio unit connected to a first antenna, a second radio unit connected to a second antenna, A baseband unit connected to the first radio unit and the second radio unit, and one of the first and second radio units operates as a primary system, and the other operates as a diversity system, When receiving an RF signal, this is a diversity radio that performs a primary operation that performs reception only in the primary system and stops reception in the diversity system, and a diversity operation that performs reception in both the primary and diversity systems. The first and second radio units each include an RFIC having the same circuit configuration, and the operation mode selection signal input to the RFIC Based on the force logic level, and a RF signal processing circuit that performs RF signal processing in one of the modes of the primary system and the diversity system.

  The RFIC according to the present invention is connected to the first radio unit connected to the first antenna, the second radio unit connected to the second antenna, and the first and second radio units. A baseband unit, and one of the first and second radio units operates as a primary system, and the other operates as a diversity system, and when receiving an RF signal, Common in the first and second radio units in a diversity radio that performs only the reception operation and stops the reception operation in the diversity system and the diversity operation that performs the reception operation in both the primary system and the diversity system RFICs used in parallel and connected in parallel to control signal lines from which control data is output from the baseband unit, A primary register that holds control data that defines the primary operation input from the control circuit, a diversity register that holds control data that defines the diversity operation input from the control signal line, and an input operation mode selection signal Based on the input logic level, the register selection circuit that enables only one of the primary register and the diversity register, and the control data held in one of the primary register and the diversity register that are enabled And an RF signal processing circuit for performing RF signal processing.

  According to the present invention, the operation mode of the RFIC can be easily set by the operation mode selection signal, and the primary system and the diversity system RF signal processing circuits are separately realized using the RFICs having the same circuit configuration. be able to. Therefore, the circuit configuration inside the RFIC can be reduced in size and simplified, and the development man-hours such as circuit evaluation can be greatly reduced.

It is a block diagram which shows the structure of the diversity radio | wireless apparatus concerning 1st Embodiment. It is a structural example of a primary register. It is an example of a structure of a diversity register. It is a structural example of a common register. It is a flowchart which shows the operation start process of RFIC. It is a register setting example of primary operation. It is a register setting example of diversity operation. It is a block diagram which shows the structure of the diversity radio | wireless machine concerning 2nd Embodiment. It is another example of register setting of the primary operation. It is another example of register setting of diversity operation.

Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, with reference to FIG. 1, a diversity radio according to the first embodiment of the present invention will be described. FIG. 1 is a block diagram illustrating a configuration of a diversity radio according to the first embodiment.

  This diversity wireless device 1 improves the communication quality and reliability of wireless communication by selecting either one of the same radio signals received by a plurality of antennas according to the radio wave condition, or combining the two. It has a diversity reception function.

  The diversity radio 1 mainly includes a radio unit (first radio unit) 10 connected to an antenna 10A (first antenna) and a radio unit (first radio unit) connected to an antenna 20A (second antenna). A second radio unit) 20 and a baseband unit 40 connected to these radio units 10 and 20 are provided.

  One of these radio units 10 and 20 operates as a primary system, and either one operates as a diversity system. When receiving an RF signal, the radio unit 10 or 20 performs a reception operation only in the primary system and performs a reception operation in the diversity system. The primary operation for stopping the transmission and the diversity operation for performing the reception operation in both the primary system and the diversity system are performed.

  In the present embodiment, RFICs 30A and 30B having the same circuit configuration are provided in the radio units 10 and 20, respectively, and the prime system and the diversity system are based on the input logic level of the operation mode selection signal input to these RFICs 30A and 30B. The RF signal processing circuit 35 that performs RF signal processing in any one of the modes is provided.

  Next, the configuration of the diversity radio 1 according to the present embodiment will be described in detail with reference to FIG. In the present embodiment, the radio unit 10 is provided with a transmission / reception function, and an operation mode selection signal 51M indicating a low logic level VL is input to the RFIC 30A of the radio unit 10, thereby causing the radio unit 10 to operate as a primary system. An example will be described in which only the reception function is provided in 20 and the radio unit 20 is operated as a diversity system by inputting the operation mode selection signal 52M indicating the high logic level VH to the RFIC 30B of the radio unit 20.

  First, the configuration of the wireless unit 10 will be described. The radio unit 10 is provided with an antenna switch (SW) 11, a duplexer 12, a power amplifier 13, an isolator 14, and an RFIC 30A as main functional units.

The antenna switch 11 is connected to the antenna 10A and is a circuit unit for switching connection of antenna elements constituting the antenna 10A and disconnecting the antenna 10A.
The duplexer 12 is connected to the antenna switch 11 and is a circuit unit for sharing the antenna 10A during transmission and reception.
The power amplifier 13 is a circuit unit that amplifies the power of the transmission RF signal output from the RFIC 30A.
The isolator 14 is a circuit unit that prevents reflection of a transmission RF signal from the antenna 10A.

The RFIC 30A is an integrated circuit in which various circuits for performing signal processing of RF signals transmitted and received by the antenna 10A are mounted on a semiconductor chip.
This RFIC is provided with a primary register 31, a diversity register 32, a common register 33, a register selection circuit 34, and an RF signal processing circuit 35 as main circuit portions.

  The primary register 31 is composed of a general register circuit that holds and outputs arbitrary input data. Primary control data output from the baseband unit 40 via the control signal line 53 is used to define primary control data. The held primary control data is output when the function to be held and the operation mode selection signal from the register selection circuit 34 are valid, and are held when the operation mode selection signal is invalid. A function of stopping the output of the primary control data (for example, a high impedance output).

FIG. 2 is a configuration example of the primary register.
Here, the transmission ON / OFF setting indicating whether or not the RF signal processing circuit 35 needs to execute the transmission processing operation, the reception ON / OFF setting indicating whether or not the RF signal processing circuit 35 needs to execute the reception processing operation, and RF signal processing Various setting items such as a reception AGC setting indicating a setting value of the AGC operation for the reception RF signal in the circuit 35 are held as data of 1 bit or more.

  The diversity register 32 is formed of a general register circuit that holds and outputs arbitrary input data. Diversity control data for defining diversity-related operations output from the baseband unit 40 via the control signal line 53 is provided. When the function to be held and the operation mode selection signal from the register selection circuit 34 indicate valid, the held diversity control data is output, and when the operation mode selection signal indicates invalid, it is retained. And a function of stopping the output of diversity control data.

FIG. 3 is a configuration example of the diversity register.
Here, the transmission ON / OFF setting indicating whether or not the RF signal processing circuit 35 needs to execute the transmission processing operation, the reception ON / OFF setting indicating whether or not the RF signal processing circuit 35 needs to execute the reception processing operation, and RF signal processing Various setting items such as a reception AGC setting indicating a setting value of the AGC operation for the reception RF signal in the circuit 35 are held as data of 1 bit or more.

  The common register 33 is a general register circuit that holds and outputs arbitrary input data, and defines an operation common to the primary operation and the diversity operation output from the baseband unit 40 via the control signal line 53. The common control data is retained.

FIG. 4 is a configuration example of the common register.
Here, initial setting for defining the initial operation in the RF signal processing circuit 35, transmission frequency setting indicating the frequency of the RF transmission signal transmitted from the RF signal processing circuit 35, and RF reception signal received by the RF signal processing circuit 35 Various setting items such as a reception frequency setting indicating the frequency of the data are held as data of 1 bit or more.

  The register selection circuit 34 outputs a register selection signal that enables only one of the primary register 31 and the diversity register 32 based on the input logic level of the operation mode selection signal 51M input to the operation mode selection terminal SEL. It has a function. The operation mode selection signal 51M is a signal for setting whether the RFIC 30A operates in the primary system or the diversity system, and is input from the outside of the RFIC 30A.

  In the example of FIG. 1, an operation mode selection signal 51M indicating a low logic level VL that sets the primary system as an operation mode is generated by a circuit such as a pull-down resistor and is input to the operation mode selection terminal SEL of the RFIC 30A. The register selection circuit 34 outputs a register selection signal that enables the primary register 31 and disables the diversity register 32, respectively.

  The RF signal processing circuit 35 includes various signal processing circuit units such as an up-converter, a down-converter, an amplifier, a filter, and the like. The transmission base input from the baseband unit 40 based on the control data held in the common register 33. Based on the RF transmission function for generating the transmission RF signal by up-converting the band signal 51S and outputting it to the power amplifier 13, and the RF reception output from the duplexer 12 based on the control data held in the common register 33 It has an RF reception function for generating a reception base hand signal 51R by down-converting the signal and outputting it to the baseband unit 40. These RF transmission function and RF reception function are general RF signal processing functions.

  In addition, the RF signal processing circuit 35 selects control data held in either one of the primary register 31 and the diversity register 32 and makes the RF transmission function and the RF reception function based on the control data. And a function of controlling the operation.

  In the example of FIG. 1, since the primary register 31 is validated by the register selection circuit 34, the RF signal processing circuit 35 selects the control data held in the primary register 31, and performs the RF transmission function and the RF reception. It controls the operation of the function.

As a circuit configuration for selecting control data, for example, as a primary register 31 and a diversity register 32, a register having a function of setting a holding data output terminal to high impedance when invalidated by a register selection signal from a register selection circuit 34 In the RF signal processing circuit 35, various general circuit configurations may be used, such as wired-OR connection of the retained data output terminals of the primary register 31 and the diversity register 32.
Alternatively, the register selection signal from the register selection circuit 34 is input to the selector circuit provided in the RF signal processing circuit 35 instead of the primary register 31 and the diversity register 32, and either one of the register selection signals is input by the selector circuit using the register selection signal. Control data may be selected.

  Next, the configuration of the wireless unit 20 will be described. The radio unit 20 includes an antenna switch (SW) 21, a filter circuit (BPF) 25, and an RFIC 30B as main functional units.

The antenna switch 21 is connected to the antenna 20A, and is a circuit unit for switching connection of antenna elements constituting the antenna 20A and disconnecting the antenna 20A.
The filter circuit 25 is a band-pass filter that is connected to the antenna switch 21 and selects a received RF signal in a desired reception frequency band from the RF signals received by the antenna 20A and inputs the received RF signal to the RFIC 30B.

  The RFIC 30B is an integrated circuit in which various circuits for performing signal processing of received RF signals received by the antenna 20A are mounted on a semiconductor chip. The circuit configuration of the RFIC 30B is the same as that of the RFIC 30A used in the wireless unit 10, and detailed description thereof is omitted here.

  In the example of FIG. 1, an operation mode selection signal 52M indicating a high logic level VH that sets the primary system as an operation mode is generated by a circuit such as a pull-up resistor and input to the operation mode selection terminal SEL of the RFIC 30B. The register selection circuit 34 invalidates the primary register 31 and outputs a register selection signal for validating the diversity register 32, respectively. For this reason, the RF signal processing circuit 35 selects the control data held in the diversity register 32 and controls the operations of the RF transmission function and the RF reception function.

  The baseband unit 40 generates a transmission baseband signal 51S by modulating transmission data input from a host device (not shown) such as a CPU, and outputs the transmission baseband signal 51S to the RFIC 30A of the wireless unit 10. A function of generating reception data by demodulating the reception baseband signal 51R input from the RFIC 30A of the radio unit 10 during operation and outputting the received data to the host device, and a reception base input from the RFIC 30A of the radio unit 10 during diversity operation Either one of the band signal 51R and the reception baseband signal 52R input from the RFIC 30B of the radio unit 20 is selected according to the radio wave condition, or both are combined and demodulated to generate reception data. And a function of outputting to a host device.

  In addition, the baseband unit 40 outputs an instruction from the host device and control data set in a storage unit (not shown) to the control signal line 53, whereby the primary register 31 and the diversity register 32 of the RFICs 30A and 30B. The common register 33 has a function of setting various control data.

[Operation of First Embodiment]
Next, the operation of the diversity radio according to the present embodiment will be described with reference to FIG. FIG. 5 is a flowchart showing an RFIC operation start process.
The RFICs 30A and 30B provided in the wireless units 10 and 20 of the diversity wireless device 1 execute the operation start process of FIG. 5 when starting a new wireless communication operation.

  First, the primary register 31 of the RFIC 30A and the primary register 31 of the RFIC 30B hold the same control data that defines the operation of the primary system output from the baseband unit 40 to the control signal line 53, respectively, at the same timing ( Step 100).

  At this time, the diversity registers 32 of the RFICs 30A and 30B also hold the same control data that defines the diversity operation output from the baseband unit 40 to the control signal line 53 at the same timing. The 30B common register 33 also holds the same control data, which is output from the baseband unit 40 to the control signal line 53 and defines common operations common to the primary system and the diversity system, at the same timing.

  Next, the register selection circuit 34 determines whether or not the input logic level of the operation mode selection signal 51M input to the selection terminal SEL is the low logic level VL (step 101).

Here, when the operation mode selection signals 51M and 52M are at the low logic level VL (step 101: YES), a register selection signal for enabling the primary register 31 and disabling the diversity register 32 is output (step 102). ).
In response to this, the RF signal processing circuit 35 receives the control data held in the valid primary register 31, that is, the control data defining the primary operation and the control data held in the common register 33. Based on these control data, primary RF signal processing is started (step 104), and a series of operation start processing ends.

On the other hand, when the operation mode selection signals 51M and 52M are at the high logic level VH (step 101: NO), a register selection signal for invalidating the primary register 31 and validating the diversity register 32 is output (step 105). .
In response to this, the RF signal processing circuit 35 receives the control data held in the enabled diversity register 32, that is, the control data defining the diversity operation and the control data held in the common register 33. Based on these control data, diversity RF signal processing is started (step 107), and a series of operation start processing ends.

  FIG. 6 is an example of register setting for primary operation. Here, “transmission ON” for operating the transmission processing function and “reception ON” for operating the reception processing function are set for both primary registers 31 of the RFICs 30A and 30B, and both diversity registers of the RFICs 30A and 30B are set. For “32”, “transmission OFF” for stopping the transmission processing function and “reception OFF” for stopping the reception processing function are set.

Here, since VL is input as the operation mode selection signal 51M of the RFIC 30A, only the primary register 31 becomes valid, and the RF signal processing circuit 35 of the RFIC 30A operates as a primary system. In addition, since VH is input as the operation mode selection signal 52M of the RFIC 30B, only the diversity register 32 becomes valid, and the RF signal processing circuit 35 of the RFIC 30B operates as a diversity system.
As a result, the diversity radio 1 as a whole implements a primary operation in which a transmission / reception operation is performed only by the primary radio unit 10 and a reception operation is stopped by the diversity radio unit 20.

  FIG. 7 is an example of register setting for diversity operation. Here, “transmission ON” for operating the transmission processing function and “reception ON” for operating the reception processing function are set for both primary registers 31 of the RFICs 30A and 30B, and both diversity registers of the RFICs 30A and 30B are set. For “32”, “transmission OFF” for stopping the transmission processing function and “reception ON” for operating the reception processing function are set.

Here, since VL is input as the operation mode selection signal 51M of the RFIC 30A, only the primary register 31 becomes valid, and the RF signal processing circuit 35 of the RFIC 30A operates as a primary system. In addition, since VH is input as the operation mode selection signal 52M of the RFIC 30B, only the diversity register 32 becomes valid, and the RF signal processing circuit 35 of the RFIC 30B operates as a diversity system.
As a result, the diversity radio 1 as a whole realizes a diversity operation in which the primary radio unit 10 performs a transmission / reception operation and the diversity radio unit 20 performs a reception operation.

[Effect of the first embodiment]
As described above, in this embodiment, the radio units 10 and 20 are provided with the RFICs 30A and 30B having the same circuit configuration, and the RFICs 30A and 30B have primary ICs based on the input logic level of the operation mode selection signal input thereto. An RF signal processing circuit 35 that performs RF signal processing in either one of the system mode and the diversity mode is provided.

  Therefore, the operation modes of the RFICs 30A and 30B can be easily set by the operation mode selection signals 51M and 52M, and the primary system and the diversity system RF signal processing circuits can be separately set using RFICs having the same circuit configuration. Can be realized. Therefore, the circuit configuration inside the RFIC can be reduced in size and simplified, and the development man-hours such as circuit evaluation can be greatly reduced.

  In the present embodiment, the RFICs 30A and 30B of the radio units 10 and 20 are connected in parallel to the control signal line 53 from which the control data is output from the baseband unit 40, and the control signal line 53 is connected to the RFICs 30A and 30B. A primary register 31 that holds control data that defines the primary system operation input from, and a diversity register 32 that holds control data that defines the diversity system operation input from the control signal line. In the circuit 34, one of the primary register 31 and the diversity register 32 is based on the input logic level of the operation mode selection signals 51M and 52M indicating whether the RFIC 30A or 30B operates in the prime or diversity mode. Only enabled, RF signal processing In road 35, performs RF signal processing based on the control data retained by either which is effective among the primary registers 31 and diversity register 32.

Thereby, in the RFICs 30A and 30B, the RF signal processing is executed based on the control data corresponding to the mode selected by the operation mode selection signals 51M and 52M among the control data held in the primary register 31 and the diversity register 32. The
For this reason, when setting control data from the baseband part 40, it becomes unnecessary to set separate control data for each of these RFICs 30A and 30B. For this reason, even when separate RFICs 30A and 30B are used, the setting processing operation in the baseband unit 40 for the radio units 10 and 20 can be greatly simplified.

[Second Embodiment]
Next, a diversity radio according to the second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a block diagram illustrating a configuration of a diversity radio according to the second embodiment.

In the first embodiment, the radio unit 10 has an RF signal transmission / reception processing function, the radio unit 10 is fixedly set as a primary system by the operation mode selection signal 51M, and the radio unit 20 has an RF signal reception processing function. As an example, the wireless unit 20 is fixedly set as a diversity system by the operation mode selection signal 52M.
In the present embodiment, an RF signal transmission / reception processing function is provided in both the radios 10 and 20, and the radio units 10 and 20 are arbitrarily set to either the primary system or the diversity system by the operation mode selection signals 51M and 52M, respectively. The case will be described.

  In the diversity radio 1 according to the present embodiment, the radio unit 20 has the same configuration as the radio unit 10. That is, the antenna switch (SW) 21, the duplexer 22, the power amplifier 23, the isolator 24, and the RFIC 30B provided in the wireless unit 20 are the antenna switch 11, the duplexer 12, the power amplifier 13, The configuration is the same as that of the isolator 14 and the RFIC 30A.

The operation mode selection signal 51M from the baseband unit 40 is input to the operation mode selection terminal SEL of the RFIC 30A, and the operation mode selection signal 51M of the operation mode selection terminal SEL of the RFIC 30B is input by the inverter INV. An operation mode selection signal 52M having an inverted logic level is input. As a result, the RFIC 30A is set to one of the primary system and the diversity system, and the RFIC 30B is set to the other mode.
In addition, about the other structure in the diversity radio | wireless apparatus 1 concerning this embodiment, and an operation start process, it is the same as that of 1st Embodiment, and detailed description here is abbreviate | omitted.

  FIG. 9 shows another register setting example of the primary operation. Here, “transmission ON” for operating the transmission processing function and “reception ON” for operating the reception processing function are set for both primary registers 31 of the RFICs 30A and 30B, and both diversity registers of the RFICs 30A and 30B are set. For “32”, “transmission OFF” for stopping the transmission processing function and “reception OFF” for stopping the reception processing function are set.

Here, since VH is input as the operation mode selection signal 51M of the RFIC 30A, only the diversity register 32 becomes valid, and the RF signal processing circuit 35 of the RFIC 30A operates as a diversity system. Further, since VL is input as the operation mode selection signal 52M of the RFIC 30B, only the primary register 31 becomes valid, and the RF signal processing circuit 35 of the RFIC 30B operates as a primary system.
As a result, the diversity radio 1 as a whole realizes a primary operation in which transmission / reception operations are performed only by the primary radio unit 20 and reception operations are stopped by the diversity radio unit 10.

  FIG. 10 shows another register setting example of the diversity operation. Here, “transmission ON” for operating the transmission processing function and “reception ON” for operating the reception processing function are set for both primary registers 31 of the RFICs 30A and 30B, and both diversity registers of the RFICs 30A and 30B are set. For “32”, “transmission OFF” for stopping the transmission processing function and “reception ON” for operating the reception processing function are set.

Here, since VH is input as the operation mode selection signal 51M of the RFIC 30A, only the diversity register 32 becomes valid, and the RF signal processing circuit 35 of the RFIC 30A operates as a diversity system. Further, since VL is input as the operation mode selection signal 52M of the RFIC 30B, only the primary register 31 becomes valid, and the RF signal processing circuit 35 of the RFIC 30B operates as a primary system.
As a result, the diversity radio 1 as a whole realizes a diversity operation in which the primary radio unit 20 performs a transmission / reception operation and the diversity radio unit 10 performs a reception operation.

[Effects of Second Embodiment]
As described above, in this embodiment, both the radio units 10 and 20 are provided with a transmission / reception function, and the operation mode selection signal 51M for the RFIC 30A and the operation mode selection signal 51M for the RFIC 30B are at the opposite logic levels. Can be switched and output from the baseband unit 40, so that the primary system and the diversity system can be dynamically switched in accordance with the reception status and the instruction from the higher-level device. Performance can be obtained.

[Extended embodiment]
The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  In the first and second embodiments, various setting data are set via the control signal line 53 from the baseband unit 40 to the primary register 31, the diversity register 32, and the common register 33 of the RFICs 30A and 30B. However, the present invention is not limited to this. For example, control data may be set for these registers from a host device (not shown) composed of a CPU or the like provided separately from the baseband unit 40.

  In the second embodiment, the case where the operation mode selection signals 51M and 52M are output from the baseband unit 40 to the RFICs 30A and 30B has been described as an example. However, the present invention is not limited to this. For example, these operation mode selection signals 51M and 52M may be output from a host device (not shown) including a CPU or the like provided separately from the baseband unit 40.

  In the first and second embodiments, the case where one radio unit that operates as a primary system and one radio unit that operates as a diversity system has been described as an example. However, the present invention is not limited thereto. is not. For example, each embodiment can be applied to a diversity radio having a plurality of radio units operating as a diversity system in the same manner as described above, and the same effects as described above can be obtained.

  In the first and second embodiments, the case where the reception diversity scheme is applied has been described as an example. However, the present invention is not limited to this, and can be similarly applied to the transmission diversity scheme. In the transmission diversity method, RF signals generated by the respective radio units are transmitted from two different antennas provided in the base station, and one or both of these RF signals are combined by the mobile phone terminal to receive processing. To do. Therefore, when the base station switches and controls the operation mode of the RF signal transmission processing of these radio units, each embodiment can be applied in the same manner as described above, and the same effect as described above can be obtained.

  DESCRIPTION OF SYMBOLS 1 ... Diversity radio | wireless machine, 10 ... Radio | wireless part (1st radio | wireless part), 10A ... Antenna (1st antenna), 11 ... Antenna switch, 12 ... Duplexer, 13 ... Power amplifier, 14 ... Isolator, 20 ... Radio | wireless Part (second radio part), 20A ... antenna (first antenna), 21 ... antenna switch, 22 ... shared device, 23 ... power amplifier, 24 ... isolator, 25 ... filter circuit (BPF), 30A, 30B ... RFIC, 31 ... primary register, 32 ... diversity register, 33 ... common register, 34 ... register selection circuit, 35 ... RF signal processing circuit, 40 ... baseband unit, 51M, 52M ... operation mode selection signal, 51S, 52S ... transmission Baseband signal, 51R, 52R ... received baseband signal, 53 ... control signal line, INV ... inverter, L ... low logic level, VH ... high logic level.

Claims (3)

A first radio unit connected to the first antenna; a second radio unit connected to the second antenna; and a baseband unit connected to the first and second radio units; Either one of the first and second radio units operates as a primary system, and the other operates as a diversity system, and when receiving an RF signal, the receiving operation is performed only in the primary system. A diversity radio that performs a primary operation for stopping a reception operation in a diversity system and a diversity operation for performing a reception operation in both the primary system and the diversity system,
The first and second radio units each include RFICs having the same circuit configuration,
The RFIC includes an RF signal processing circuit that performs RF signal processing in either one of the primary system and the diversity system based on an input logic level of an input operation mode selection signal. transceiver. The diversity radio according to claim 1,
The RFIC of the first and second radio units is
It is connected in parallel to each control signal line from which control data is output from the baseband unit,
A primary register that holds control data defining the operation of the primary system input from the control signal line;
A diversity register for holding control data defining the operation of the diversity system input from the control signal line;
A register selection circuit that enables only one of the primary register and the diversity register based on an input logic level of the input operation mode selection signal;
The diversity radio apparatus, wherein the RF signal processing circuit performs RF signal processing based on the control data held in one of the primary register and the diversity register that is enabled. A first radio unit connected to the first antenna; a second radio unit connected to the second antenna; and a baseband unit connected to the first and second radio units; Either one of the first and second radio units operates as a primary system, and the other operates as a diversity system, and when receiving an RF signal, the receiving operation is performed only in the primary system. In a diversity radio that performs a primary operation for stopping a reception operation in a diversity system and a diversity operation in which a reception operation is performed in both the primary system and the diversity system, the first and second radio units share the same RFICs used and connected in parallel to control signal lines from which the control data is output from the baseband unit,
A primary register that holds control data defining the operation of the primary system input from the control signal line;
A diversity register for holding control data defining the operation of the diversity system input from the control signal line;
A register selection circuit that enables only one of the primary register and the diversity register based on an input logic level of the input operation mode selection signal;
An RFIC comprising: an RF signal processing circuit that performs RF signal processing based on the control data held in one of the primary register and the diversity register that is enabled.

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