JP2008199529A - Radio apparatus and adjusting method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio apparatus and adjusting method thereof in which a radio apparatus which reads radio apparatus adjustment data stored in an external memory and adjusts constitutive blocks during operation is available as a radio apparatus even if the data can not be read from the external memory. <P>SOLUTION: Accurate correction data for adjustment are stored in an external memory and initial data (fixed data) are stored in a CPU. If data can not be read from the external memory, the fixed data of the CPU are used for adjustment. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a radio and an adjustment method thereof, and more particularly to a radio having a function of adjusting a reference frequency, transmission power, modulation degree, and the like when operating the radio, and a control method thereof.

  In recent years, in radio communication systems including land mobile radio (LMR) for business use and leisure, the frequency band per channel has been narrowed from the viewpoint of frequency utilization efficiency, and the performance of the device has been improved. Digitization is progressing from various viewpoints such as miniaturization, high functionality, and versatility. When digitizing, frequency division multiplexing using frequency modulation keying (FSK) of FM modulation because of coexistence with existing analog wireless communication devices, diversion of existing equipment, ease of control, etc. (Frequency Division Multiple Access (FDMA)) or phase shift keying (PSK) that changes the phase is often employed.

  In such a digitized radio, each circuit block is controlled based on a program and data stored in a memory such as a RAM and a ROM, centering on the built-in CPU, and is specific to each radio. As for the transmission frequency, reception frequency, modulation factor, transmission power, etc. that are set, the control data is generally stored in RAM or ROM. These control data are written in the adjustment data storage EEPROM or the like to correct the deviation from the specified value while actually operating in order to absorb the manufacturing error of each device that occurs in the manufacturing process of the radio. Is generally performed. Note that EEPROM (Electronically Erasable and Programmable Read Only Memory) used as adjustment data storage memory is an electrically rewritable ROM that includes improvements such as flash memory that does not lose its stored contents even when the power is turned off. It is.

FIG. 5 is a schematic diagram of adjustment processing showing the state of conventional wireless device adjustment data storage processing. In this example, the amplification factor, the modulation factor, the transmission power adjustment, and the band pass filter of the microphone amplifier of the transmission unit of the wireless device are shown. The case where characteristic adjustment is performed is illustrated.
The transmitter shown in FIG. 5 amplifies the sound output of the microphone 50 to a required level by the microphone amplifier 51, and modulates the high-frequency signal with the microphone output signal in a modulation circuit not shown. The modulated high-frequency signal is amplified to the transmission power defined by the required number of transmission power amplifiers 52 to 54 through a frequency multiplier circuit and a filtering circuit for removing unnecessary frequency components as necessary, and then the band-pass filter 55 is passed through. Via the transmission antenna 56. Furthermore, the bandpass filter 55 is for removing unnecessary signals such as harmonics. In this example, capacitors C1 and C2 are electrically connected to both sides of the inductance element (coil) L inserted in series. This is an example in which a band-pass filter of a so-called π-match circuit is used in which a series circuit with variable capacitance elements (variable capacitance diodes) VC1 and VC2 connected to each other is used, and the variable capacitance elements VC1 and VC2 Can adjust the pass-band filter by applying a voltage signal from a fourth D / A 60 described later via the resistance elements R1 and R2.

  In order to adjust each of these circuit blocks, the microphone amplifier 51 has a first digital / analog converter (hereinafter referred to as D / A) 57, and the transmission power amplifier first stage amplifier 52 has a second D / A 58. A third D / A 59 is connected to the final stage amplifier 54, and a fourth D / A 60 is connected to the variable capacitance elements VC1 and VC2 of the band-pass filter 55. Further, these D / A 57 to 60 are connected to these D / A 57 to 60. The control signal is supplied from the control CPU 61, but the control data is stored in the EEPROM 62 added to the CPU 61.

In this configuration, the radio device is adjusted using the radio device adjustment facility 63. As the radio equipment adjustment equipment, for example, a frequency counter, a high-frequency power meter, a spectrum analyzer, a modulation degree measuring device, etc., or an adjustment device having these functions can be considered. In general, a computer having a required measurement processing program and data is used for controlling each measuring apparatus.
While using such adjustment devices and measuring equipment, the measurement of unnecessary wave levels such as specified transmission power, modulation factor, frequency, spurious, etc. is performed, and adjustment is performed so that each value satisfies the specified value. . In these controls, a process of obtaining digital data corresponding to an analog signal to be supplied to each control block while operating the above-described computer and writing them into the EEPROM 62 connected to the CPU 61 is executed. As a result, variations such as manufacturing errors are absorbed, and the wireless device is shipped from a factory or the like as a wireless device that is accurately adjusted.
As means for digitally adjusting in a wireless device or the like, for example, Patent Document 1 of the invention related to the same applicant is known. This relates to a radio transmitter capable of omitting a dedicated D / A for power saving control and memory resources.

In the example described above, an example of the configuration of an analog modulation type transmission unit has been shown for the sake of simplicity of explanation, but the same control is generally performed also in a digital modulation type radio.
In actual operation, the control data of the EEPROM 62 is read through the CPU 61 when the power is turned on, and the digital signal is converted into an analog signal in each of the D / A 57 to 60 based on the control data. And functions as a wireless device having performance such as a specified modulation degree, frequency, transmission power, and the like.
JP 2003-188743 A

However, in the conventional method as described above, in the unlikely event that the EEPROM 62 breaks down and does not function, or even in a state where no failure occurs, there is a hindrance to the exchange with the CPU in whole or in part. If the error correction such as checksum is not normal and the adjustment data cannot be acquired, the control signal to be supplied to each D / A cannot be generated, so that the function as a wireless device is lost at all. there were.
That is, when operating the radio as shown in FIG. 6, when the power is turned on, the control data of each circuit block of the EEPROM 62 is read through the CPU 61 as an initial operation. In this example, the control data for controlling the modulation degree is DA1 = D1, the amplification degree (gain) control data DA2 = D2 of the first stage amplifier 52 of the transmission power amplifier, and the amplification degree (gain) control data DA3 = D3 of the final stage amplifier 59. , As control data DA4 = D4... Of the variable capacitance elements VC1, VC2 of the band pass filter 55, the respective data values are stored in the EEPROM 62, D1 = 25h, D2 = 80h, D3 = 33h, D4 = Eh,. .., Dn = 23h, so that data is read and supplied to each D / A.

Normally, when the CPU exchanges data with other devices or devices, it is normal to use an error correction function such as a check sum to prevent reading wrong data. Only when these error detections are normal, each block functions normally by being converted into an analog signal such as a direct current in each D / A 57 to 60 based on the read data. It functions as a radio having performance such as modulation degree, frequency, transmission power and the like.
However, as shown in FIG. 7, if data reading from the EEPROM 62 fails, data is not supplied to each D / A of the wireless device, so that it does not function as a wireless device. In particular, the inability to use a radio device in an emergency involving human life or property can be a major problem.
The present invention has been made in order to eliminate the drawbacks related to the adjustment control of the conventional wireless device, and in the unlikely event that data cannot be read from the memory in which the control data is recorded. Another object of the present invention is to provide a wireless device and a method for adjusting the wireless device that can maintain the function of the wireless device.

In order to solve this problem, the present invention provides a wireless device according to claim 1, wherein at least one of a transmission unit and a reception unit, a function adjustment unit that adjusts a constituent block function thereof, and an adjustment that controls the function adjustment unit. In the wireless device including the means control unit, the adjustment means control unit is configured to control the function adjustment unit based on the CPU storing the adjustment basic data for controlling the function adjustment unit. Writable external memory that stores control correction data to compensate for errors from the optimal adjustment state, and function block adjustment based on adjustment basic data and control correction data during function adjustment, and control correction data from the external memory Is provided with means for adjusting the functional block on the basis of the adjustment basic data when it is not read correctly.
According to a second aspect of the present invention, in the wireless device according to the first aspect, the external memory is an electrically rewritable memory (EEPROM) including a flash memory or the like, and the function adjustment means receives a digital signal as an analog signal. And a digital / analog converter (D / A) that converts the signal into a function and includes at least one of a channel frequency, a modulation factor, a transmission output level, and a filter characteristic as function adjustment items.

The invention according to claim 3 relates to a method of a radio device, and stores at least one of a transmission unit or a reception unit, a function adjustment unit that adjusts a configuration block function thereof, and adjustment basic data for controlling the function adjustment unit. In a method for adjusting a radio device comprising a CPU and a writable external memory, a process for controlling the function adjusting means based on the adjustment basic data stored in the CPU and a function adjustment based on the adjustment basic data A process for detecting an error from the optimum adjustment state when the means is controlled, a process for creating control correction data for compensating for this error and making the optimum adjustment state, and the control correction data created by this process are stored in an external memory. Write processing, adjustment of functional blocks based on the adjustment basic data and control correction data at the time of function adjustment, and from external memory Characterized in that it comprises a process of adjusting the functional blocks based on the adjustment basic data stored in the CPU if your correction data is not read correctly.
According to a fourth aspect of the present invention, in the wireless device adjustment method according to the third aspect, the external memory is an electrically rewritable memory (EEPROM) including a flash memory or the like, and the function adjustment means includes a digital signal. A digital-to-analog converter (D / A) that converts the signal into an analog signal, and function adjustment items include at least one of channel frequency adjustment processing, modulation degree adjustment processing, transmission output level adjustment processing, and filter characteristic adjustment processing It is characterized by including.

  Since the present invention is configured or processed as described above, the following effects can be obtained. That is, the wireless device according to claim 1 is a wireless device having either or both of transmission / reception functions, a function adjusting means for adjusting a component block function, an adjusting means control unit for controlling the function, and a function adjusting means. A CPU that stores basic adjustment data for controlling the control, and an external memory that stores control correction data for compensating for an error from the optimal adjustment state when the function adjusting means is controlled based on the basic adjustment data. Adjusts the function block based on the adjustment basic data and the control correction data at the time of function adjustment, but if the control correction data is not read correctly from the external memory, the function block is adjusted based on the adjustment basic data. It is configured to do. Therefore, according to the present invention, even if the control correction data cannot be read from the external memory, the function block can be adjusted based on the adjustment basic data stored in the CPU as firmware, for example. Yes, the function as a radio can be maintained. In addition, when the control correction data cannot be read out partially, it is possible to operate in the optimum state as much as possible by using the adjustment basic data stored in the CPU only for the unreadable part. .

  According to the second aspect of the present invention, the use of an electrically rewritable memory (EEPROM) including a flash memory or the like as the external memory in the wireless device according to the first aspect makes it possible to hold necessary data with a small current. In addition, since the function adjustment means is equipped with a digital / analog converter (D / A), digital processing under the control of the CPU can be used, and complicated processing can be easily performed digitally by using a DSP or the like. Become. Further, the function adjustment items are not limited to this example, but include at least one of the channel frequency, the modulation degree, the transmission output level, and the filter characteristics, which is useful for maintaining the function as a radio.

  In the third and fourth aspects of the invention, since the wireless device according to the first and second aspects is realized as a processing procedure, the present invention is implemented in an existing wireless device in which digital processing is adopted. Even in such a case, it can be realized by changing the software or the like only by adding a processing program or data without requiring a significant design change.

Hereinafter, the present invention will be described in detail using the illustrated embodiments. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .
FIG. 1 is a schematic configuration diagram of a radio apparatus employing the present invention. In this example, an analog modulation type transmitter is shown. In FIG. 1, reference numeral 1 denotes a microphone that converts sound into an electric signal. The sound signal is amplified to a required level by a microphone amplifier 2 and supplied to a modulation circuit (not shown). In the case of FM modulation, the modulation circuit is often performed by superimposing an audio signal on, for example, a control voltage of a voltage controlled crystal oscillation circuit or a voltage controlled oscillator in a loop of the PLL oscillation circuit. The high-frequency signal modulated by the audio signal passes through a frequency multiplication circuit and a filtering circuit for removing unnecessary frequency components as necessary, and transmits a required number of transmission power amplifiers. In the example shown in FIG. After being amplified up to the transmission power defined by, the band is passed through the bandpass filter 6 and supplied to the transmission antenna ANT.

  The band-pass filter 6 is for removing unnecessary signals such as harmonics. In this example, as described in the conventional example, capacitors C1, C2 are provided on both sides of an inductance element (coil) L inserted in series. And a so-called π-match circuit type band-pass filter in which a series circuit of variable capacitance elements (variable capacitance diodes) VC1 and VC2 whose capacitance can be electrically controlled is connected. The variable capacitance elements VC1 and VC2 The filter characteristics such as the passband frequency and the cutoff characteristic can be adjusted by applying a control voltage via the resistance elements R1 and R2.

  The microphone amplifier 2 has a first digital / analog converter (hereinafter referred to as D / A) 7, the transmission power amplifier first stage amplifier 3 has a second D / A 8, and the last stage amplifier 5 has a third D / A 8. Further, the fourth D / A 10 is connected to each of the variable capacitance elements VC1 and VC2 of the band-pass filter 6, and the D / A 7 to 10 are connected to the D / A 7 to 10 from the control CPU 11. A control signal is supplied, and an EEPROM 12 is added to the CPU 11. The CPU 11 adjusts to be supplied to each of the D / A 7 to 10 described above so as to meet the specified channel frequency, transmission power, modulation degree, allowable level of unnecessary harmonics, and the like according to the purpose of use. Initial data for control (basic adjustment data) is recorded. These adjustment basic data are adjustment data that is in an accurate adjustment state on the assumption that each wireless device is manufactured as designed. For example, as with various control programs and data, firmware The method of storing the data in the required memory area of the CPU 11 as wear would be convenient for mass production.

  However, as described above, a mass-produced radio is slightly different from the optimal state (ideal value) in terms of transmission power, modulation factor, channel frequency, filter characteristics, etc. due to variations in the characteristics of parts used, manufacturing errors, etc. In general, it includes an error. Therefore, immediately before factory shipment or at the completion of preparation, as shown in FIG. 1, it is connected to the radio equipment adjustment work facility 13 and final adjustment is performed so as to meet the standard.

As the radio equipment adjustment equipment, as described above, for example, a frequency counter, a high-frequency power meter, a spectrum analyzer, a modulation degree measuring device, etc., or an adjustment device having these functions, and further, control of the CPU 11 of the radio equipment If a computer having a required measurement processing program and data is used for controlling each measuring apparatus, functional adjustment will be possible. While using such adjustment and measurement equipment, measurement of unnecessary wave levels such as specified transmission power, modulation degree, frequency, spurious, etc. and adjustment to be below a specified value are performed.
At this time, in the present invention, each part of the radio is adjusted based on the adjustment basic data (initial data) recorded in the CPU 11, and the difference between each measurement result of the radio and the ideal value is detected, and this error is detected. The adjustment control data is changed so that becomes smaller (ideally zero), and the difference between the ideal control data value and the adjustment basic data value is obtained as control correction data. These data are created for each data to be supplied to each D / A as shown in FIG.

This will be described in detail with reference to FIG. 1. The CPU 11 stores fixed values as basic adjustment data (initial data). In FIG. 1, each data is stored in the D / A 7 that controls the modulation degree. The control data to be supplied is DA1 = D1 = 23h, the data DA2 = D2 = 82h for the D / A8 for controlling the amplification degree (gain) of the first stage amplifier 3 of the transmission power amplifier, and the D / A9 for controlling the final stage amplifier 5. The control data DA3 = D3 = 32h, and the control data DA4 = D4 = 50h,... Are stored in the D / A 10 that controls the variable capacitance elements VC1 and VC2 of the bandpass filter 6. Therefore, first, each D / A is controlled based on the basic adjustment data, and the radio performance item obtained as a result of the adjustment is compared with the optimum state (ideal value or design value) to obtain the difference between the two. In the example of FIG. 1, each control data (adjustment value) in the optimal adjustment state is DA1 = D1 = 25h, DA2 = D2 = 80h, DA3 = D3 = 33h, and DA4 = D4 = 4Eh. Value (correct control data) −fixed value (initial data) = saved value (control correction data), and the control correction data is stored in the EEPROM 12.
The above processing is adjustment at the time of factory shipment. As a result, the adjustment basic data remains as a fixed value in the CPU 11 of the wireless device, and the external memory 12 stores control correction data necessary for accurate adjustment by absorbing the manufacturing error. It becomes a state.

  FIG. 2 is a diagram for explaining the state of the wireless device when the wireless device is actually operated, and illustrates the case where the adjustment process is automatically started when the wireless device is powered on. When the power is turned on, the CPU 11 detects that fact and starts the adjustment process, and reads the control correction data stored in the EEPROM 12. At this time, an error correction function such as a checksum is added to prevent wrong data from being read. If the check is OK, the read control correction data is stored in a fixed value (adjustment) stored in the CPU 11. (Basic data, initial data), and control signals to the D / A 7 to 10 are generated and supplied based on the obtained appropriate adjustment data. In each of D / A7 to D / A10, the digital signal is converted into an analog signal such as a direct current and supplied to the controlled block. As a result, each block is normally adjusted and functions as a radio device having performance such as a prescribed modulation degree, frequency, transmission power, spurious suppression function, and the like.

  On the other hand, as shown in FIG. 3, in the adjustment process at the time of start-up, for example, when the control correction data cannot be read from the EEPROM 12 as a result of error correction such as checksum, the CPU 11 detects that fact and The adjustment of each block is executed based on the stored fixed values (adjustment basic data, initial data). According to this process, based on the data stored in the CPU 11, DA1 = Db1 = 23h, DA2 = Db2 = 82h, DA3 = Db3 = 32h, DA4 = Db4 = 50h, and there are some adjustment errors, but there is a regulation. It becomes possible to use as a radio having a performance within the allowable range of values. Therefore, if the adjustment result at this time falls within the allowable range defined in the standard, it is possible to maintain a function that can be sufficiently used as a wireless device. It can be understood that, when the control data cannot be read from the external memory in the past, a significant effect can be obtained as compared with the case where the control data cannot be functioned at all.

FIG. 4 is a flowchart showing an example of the adjustment process of the present invention. In this example, the control correction data stored in the external memory is read out for each data, and those that can be read are subjected to accurate adjustment using the data. However, if any one of them cannot be read, the fixed value (adjustment basic data) in the CPU 11 may be used for all of them.
That is, in FIG. 4, when the power is turned on, the start switch is operated, the adjustment process is started (S1), and the control correction data stored in the external memory such as the EEPROM 12 is read. (S2) and the presence / absence of reading is determined (S3). As a result of the determination, if the reading is successful (S3, Yes), the adjustment process is executed with the adjustment basic data and the control correction data (S4), and it is determined whether or not the adjustment of all the blocks has been completed (S4). S5). If adjustment has not been completed for all items, the process returns to step S2 to perform adjustment of the next block, and S2 to S5 are repeated. If the control correction data cannot be read from the external memory in step S3 (S3, No), the adjustment is performed using a fixed value (adjustment basic data, initial data) in the CPU 11. (S6).
If the control correction data cannot be partially read out from the external memory by performing such processing, only the items for the data are adjusted using the adjustment basic data stored in the CPU 11 as accurately as possible. Adjustments can be made.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the adjustment target item is not limited to the transmitter and can be similarly applied to the receiver. Further, the control correction data stored in the external memory may be the adjustment value itself instead of the difference information obtained by subtracting the fixed value from the adjustment value. In that case, control data is supplied to each block using control adjustment data obtained directly from an external memory without adding control correction data to the CPU fixed value or performing operations such as subtraction during operation. I can do it. Even in this case, the control correction data based on the above-described error is stored in the external memory or the required memory of the CPU, and the above-described calculation is performed to perform the correctness check process of the control data acquired from the external memory. Is also possible. Furthermore, it may be preferable to use a means for confirming whether the result adjusted based on the above procedure is within a specified allowable range from the viewpoint of improving the function of the radio. Furthermore, the data to be recorded in the external memory or CPU as the items to be adjusted for the radio is not limited to the items defined in the standards as described above, but the operation of the radio receiver sensitivity adjustment and other additional functions. It may be adjustment / inspection data for confirmation.

As means for digitally adjusting using a D / A in a wireless device or the like, for example, Patent Document 1 of the invention related to the same applicant is known, and can be referred to and used together with the present invention. You can also do it. In the above-described embodiments, the configuration example of the analog modulation type transmission unit has been shown for the sake of simplicity. However, the present invention can be similarly applied to a digital modulation type radio device when the same control is performed. It is. The external memory need not be limited to the EEPROM, and any memory that functions in the same manner can be used.
Furthermore, if the processing parts necessary for carrying out the present invention are implemented as a program, the present invention can be implemented in software by installing it in a radio equipped with a CPU and memory. The program for this purpose can be recorded in various memories and provided, or distributed via communication means.

1 is a schematic diagram illustrating a configuration example of a radio device and an initial setting adjustment method according to the present invention. The schematic diagram which shows the adjustment process condition at the time of operation | use of the radio | wireless machine which concerns on this invention. The schematic diagram which shows the other adjustment process condition at the time of operation | use of the radio | wireless machine which concerns on this invention. 5 is a flowchart illustrating an example of a radio device adjustment method according to the present invention. The schematic diagram which shows the structural example and the initial setting adjustment method of the conventional radio | wireless machine. The schematic diagram which shows the adjustment process condition at the time of operation of the conventional radio | wireless machine. The schematic diagram which shows the other adjustment process condition at the time of operation of the conventional radio | wireless machine.

Explanation of symbols

  1 Microphone, 2 Microphone amplifier, 3, 4, 5 Transmission power amplifier, 6 Filter, 7, 8, 9, 10 Digital / analog converter (D / A), 11 CPU, 12 External memory (EEPROM), 13 Radio Equipment for adjustment work.

Claims (4)

  In a wireless device including at least one of a transmission unit or a reception unit, a function adjustment unit that adjusts a function of the component block, and an adjustment unit control unit that controls the function adjustment unit, the adjustment unit control unit includes the function Writable storing control correction data for compensating for an error between the CPU storing adjustment basic data for controlling the adjusting means and the optimum adjustment state when the function adjusting means is controlled based on the adjustment basic data A function block is adjusted based on the adjustment basic data and the control correction data at the time of function adjustment, and the function is based on the adjustment basic data when the control correction data is not correctly read from the external memory. A wireless device comprising means for adjusting a block.   The external memory is an EEPROM, and the function adjusting means has a digital-to-analog converter for converting a digital signal into an analog signal. Function adjustment items include at least a channel frequency, a modulation degree, a transmission output level, and a filter characteristic. The radio according to claim 1, comprising one.   A wireless device comprising at least one of a transmission unit and a reception unit, a function adjustment unit that adjusts the function of the component block, a CPU that stores adjustment basic data for controlling the function adjustment unit, and a writable external memory In the adjustment method of the machine, an error between the process of controlling the function adjustment unit based on the adjustment basic data stored in the CPU and the optimum adjustment state when the function adjustment unit is controlled based on the adjustment basic data is calculated. A process of detecting, a process of creating control correction data for compensating for the error to obtain an optimal adjustment state, a process of writing the control correction data to an external memory, and the adjustment basic data and the control correction data during function adjustment. Processing for adjusting the functional block based on the adjustment basic data when the control correction data is not correctly read from the external memory. Adjustment method for radio, which comprises a process of adjusting the Zui functional block.   The external memory is an EEPROM, and the function adjusting means has a digital / analog converter for converting a digital signal into an analog signal. Function adjustment items include channel frequency adjustment processing, modulation degree adjustment processing, and transmission output level adjustment. 4. The radio apparatus adjustment method according to claim 3, further comprising at least one of processing and filter characteristic adjustment processing.

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