JPH02142229A - mobile radio communication equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile radio communication device, and particularly to automatic control of transmission power thereof.

[Prior Art] Fig. 3 is a block diagram showing a portable radio device constituting a mobile radio communication device. In the figure, (31) is an antenna terminal, and (32) is a duplexer (the drawing symbol is DUP). ,
(33) is the receiving section (the drawing symbol is RX), (34) is the logic section (the drawing symbol is LOG I C), (3
5) is a reference voltage generation circuit (the drawing symbol is VREF)
, (36) is the modulation signal input terminal, (37) is the power amplification section (the drawing symbol is PA), (38) is the coupler (the drawing symbol is CPL), and (39) is the detector (the drawing symbol is CPL). (40) is a comparator (the drawing symbol is COMP), (41) is a controller (the drawing symbol is C0NTR), and (42) to (45) are connection terminals.

A mobile radio communications device is marked with a station class mark that indicates the class of its nominal transmit power.
ss mark) with a nominal transmitting power of 4 watts is C1ass I, which is about 4 dB lower than that of 1.6
It is classified into three types: C1ass II, which is about 4 dB lower, and C1ass m, which is about 4 dB lower and has 0.6 watts. The class to which your station belongs is determined by the logic section (34) as the station class mark code.
is stored in

The transmission output of this mobile radio communication station is controlled by receiving a transmission output setting control signal from a partner base station. The control signal code for the control signal for setting the transmission output consists of a 3-bit digital signal, and is transmitted from the antenna to the transmitter/receiver (32).
, and enters the logic section (34) via the reception section (33), and the transmission output level is determined in relation to the station class mark code stored in the logic section (34).

Figure 2 is a diagram showing the relationship between the transmission output level determined in this way, the station class mark code, and the transmission output setting control signal. , its logic is H, L, and the station class mark is 1. From the logic section (34) to the reference voltage generation circuit (35), represented by II and III
Similarly, the 3-bit signal that controls
Therefore, when the station class mark is I, the bit pattern of the transmission output setting control signal is output as is to the reference voltage generation circuit (35) (4th line in Figure 2).
When the station class mark is ■, rLLLJ in the bit pattern of the transmission output setting control signal is rL.
LH, and output to the reference voltage generation circuit (35) (FIG. 2, line 5), and when the station class mark is ■, rLLLJ and rLLH of the bit pattern of the transmission output setting control signal are output. .

and is changed to rLHL, and the reference voltage generation circuit (35)
(line 6 of FIG. 2), however, II#1. of line 7 and line 8 of FIG. n1aI will be explained later. Numbers 1 to 10 indicate levels in 4 dB steps, and 1 is 4.
Watt, 2 indicates 1.6 Watt...

The logic section (34) outputs digital signals representing transmission levels 1 to 8 shown in FIG.
) inputs this digital signal and outputs an analog voltage representing the transmission output level, and uses this analog voltage as a reference signal to operate the power amplifier (37), coupler (38), and detector (
39), a comparator (40), a controller (41), and a power amplifier (37), which automatically control the transmission output.

The portable radio device shown in FIG. 3 may be used as a mobile radio communication device as is, or it may be used in combination with a booster amplifier as a mobile radio communication device with increased transmission output.

Figure 4 is a block diagram showing the configuration of a conventional booster amplifier (1), in which (11) is an antenna terminal;
2) is the transmitter/receiver duplexer, (13) is the reception high frequency amplification unit (the drawing symbol is AMP), (14) is the transmitter/receiver duplexer, (1
5) is a power amplifier, (16) is a coupler, (17) is a detector, (18) is a comparator, (19) is a booster amplifier (
1) Reference voltage generation circuit, (20) controller, (21)
are high frequency signal input terminals, and (22) to (25) are connection terminals, respectively.

Figure 5 shows a portable wireless device (3) and a booster amplifier (1).
) (the station class mark is assumed to be ■). In the figure, the same symbols as in Figures 3 and 4 indicate the same or equivalent parts, and (2) is a portable radio device. It is a pedestal.

The connection terminal (42) of the portable wireless device (3) is connected to the booster
It is grounded through the connection terminal (22) of the amplifier (1), and this ground signal is sent to the logic section (34) and the reference voltage generation circuit (3).
5) control. Booster amplifier station
Since the class mark is I, the audio signal section (34) outputs a digital signal corresponding to the fourth line in FIG. 2 under the control of this geosignal.

When the booster amplifier (1) is connected, the station class mark of the portable wireless device (3) is ■ (or ■), and each bit pattern of the control signal for setting the transmission output is On the other hand, the output within 1.6 watts (or 0.6 watts) is set as the highest level, and a reference voltage is generated to control the output level in eight steps.

Therefore, in this case, the control of the portable radio device (3) is equivalent to the operation when the digital signal shown in line 7 or line 8 of FIG. 2 is output.

On the other hand, the output of the logic section shown in the fourth row of FIG.
43) to (45) and (23) to (25) to the reference voltage generating circuit (19), and is controlled as a class I station. The feedback control within the booster amplifier (1) is similar to the feedback control within the portable radio device (3).

[Problems to be Solved by the Invention] Since the conventional device is configured as described above, the portable wireless device (3) has connection terminals (43), (44), (45).
), which poses the problem of making it difficult to design a portable wireless device that requires size and weight reduction.

The present invention was made in order to solve the above-mentioned problems in conventional devices, and aims to provide a mobile radio communication device that combines a portable radio device with a booster amplifier and eliminates the obstacles of reducing size and weight. The purpose is

[Means for Solving the Problems] In a mobile radio communication device according to the present invention, a reference voltage for a booster amplifier is generated in a portable radio device, and the generated reference voltage is transmitted at high frequency from the portable radio device to the booster amplifier. It was decided that power would be transmitted using a high-frequency feed line, and this would be separated within the booster amplifier.

[Operations] In this invention, a reference voltage for a booster amplifier is generated by a portable radio device, and the generated reference voltage is transmitted by a high-frequency feed line that transmits high-frequency power from the portable radio device to the booster amplifier. Since this is separated within the booster amplifier, the signal line and its terminal for transmitting the digital signal from the logic section of the portable wireless device to the booster amplifier can be omitted.

[Examples] Examples of the present invention will be described below with reference to the drawings. 1st
The figure is a block diagram showing an embodiment of the present invention. In the figure, the same reference numerals as in FIGS. 3 to 5 indicate the same or corresponding parts, and (29) is a level discriminator (the drawing symbol is LEVEL); (30) is a reference voltage generation circuit (drawing symbol is VR
EF). Further, C1°C2, C31 are DC blocking capacitors, C3, C32 are high frequency bypass capacitors, and Ll, L31 are high frequency blocking inductors.

The configuration of the portable wireless device (3) shown in FIG. 1 is different from the configuration of the portable wireless device (3) shown in FIG.
Since the parts other than ~(45> and its wiring) are the same as the device shown in FIG. 3, a description of the directional operation will be omitted.

If booster amplifier (1) is not connected (If booster amplifier (1) is not connected, connect terminal (31)
), station class
Depending on whether the mark is ■ or ■, the digital signal shown in the 5th or 6th line of FIG.
), and the output from the terminal (31) is controlled according to the numerical values shown in the fifth or sixth line of FIG. In FIG. 2, the number 2 indicates 1.6 watts, and as explained above, each time the number increases by 1, the output decreases by 4 dB.

As shown in Figure 1, when the booster amplifier (1) is connected, an earth signal is given to the terminal (42), and the logic section (34) outputs the digital signal shown in the fourth row of Figure 2. . In this case, the level of high frequency power from the antenna terminal (31) of the portable radio device (3) may be any appropriate level.

On the other hand, the reference voltage VREF is sent out from the terminal (31) to a coaxial cable (radio frequency feed line) in a superimposed manner on the high frequency power. For C31, VREF is a portable wireless device f(
3) prevents the high frequency part from entering the L31, C3
2 prevents high frequency power from entering VREF (35).

The high frequency power input to the terminal (21) of the booster amplifier (1) enters the power amplification section (15) via the duplexer (14) and capacitor C2, and VREF is connected to the inductor L.
1 and enters the level discriminator (29). C1 prevents VREF from entering the reception high frequency amplification section (13) when the duplexer (14) is connected for reception. Also, it is generated in the reference voltage generation circuit (35) and the booster amplifier (
In order to increase the tolerance of VREF transmitted to 1), a level discriminator (29) and a reference voltage generation circuit (30
) is provided.

Figure 6 is a connection diagram showing an example of the level discriminator (29) and reference voltage generation circuit (30) in Figure 1, where the same symbols as in Figure 1 indicate the same parts, and R1-R9 are fixed resistors. ,C1,C
2a, C2b to C8a, C8b is a comparator, 62 to G8 are gates, 11 to ■8 are inverters, 8
1 to S8 are switches, Rv1 to Rv8 are variable resistors, Bl
~B8. A1 is an operational amplifier, R11 to R20 are fixed resistors, and (291), (292>, and (301) are terminals, respectively.

The output of the inductor L1 input to the terminal (291) is output from the comparators C1, C2a ~ (Ja, C2b ~ C
8b. Corresponding to the eight levels of VREF, comparators C2a, C2b and gate G2; comparators C3a, C3b and gate G3.・・・
・They each constitute a window comparator, and the inverter 1 is adjusted according to the 8 levels of VREF.
It is designed so that the output of any one of the eight inverters 1 to I8 becomes L, and the corresponding switch is turned on. Therefore the transmitted VREF
Even if the voltage level is not accurate, as long as it is accurate enough not to be confused with an adjacent level, the level discriminator (29) will determine the correct level. Terminal (292) is an input terminal for a stabilized DC voltage.

B1 to B8 are buffer amplifiers with a gain of 1, and A1 is an adder. To make the gain of adder AI 1, for example, R1
1~R1g=100Ω, R19=100Ω/(8
-1), Ω may be set to R20=100.

For example, if an analog voltage corresponding to level 3 in the fourth row of FIG. 2 is output as VREF, the switch S3 in FIG. Voltage is output.

Feedback control of the power amplifying section (15) is performed based on the reference voltage outputted in this manner as in the conventional device.

"Effects of the Invention" As explained above, the present invention makes it possible to reduce the size and weight of a mobile radio device by omitting the digital signal output terminal of a portable radio device used in combination with a booster amplifier. There is an effect that it can be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the relationship among transmission output setting signals, station class mark codes, and transmission output levels, and FIG.
Figures 4 and 5 are block diagrams showing conventional devices;
The figure is a connection diagram showing an example of the level discriminator and reference voltage generating circuit of FIG. 1. (1)... Booster amplifier, (2)... Portable radio device cradle, (3)... Portable radio device, (15)...
...Power amplification section, (16)...Coupler, (17)...
・Detector, (18)...Comparator, (20)...Controller, (29)...Level discriminator, (30)...Reference voltage generator, (34)...Logic Department, (35)...
・Reference voltage generation circuit (37)...Power amplification section, (38
)...Coupler, (39)...Detector, (40)...
・Comparator, (41)... Controller, (42)... Connection terminal, CI, C2, C31... DC blocking capacitor, C3, C32... High frequency bypass capacitor, L
l, L31... High frequency blocking inductor. In addition, the same symbols in each figure indicate the same or corresponding parts.
, 45: f Digital signal terminal 36: Modulated signal input terminal Figure 3 11: Antenna terminal 21: High frequency signal input terminal 23. 24, 25: Digital signal terminal Figure 4 Procedure amendment (self-proposed) December 27, 1988 Day

Claims (1)

[Claims] A station class mark code representing the class of the nominal transmission power of the own station is stored, and the station class mark code is combined with a transmission power setting control signal commanded from the base station. Therefore, there is a logic section that outputs a digital signal representing the transmission output level, a reference voltage generation circuit that inputs the digital signal output from this logic section and outputs an analog voltage representing the transmission output level, and a reference voltage generation circuit that outputs an analog voltage representing the transmission output level. In a mobile radio communication device having a portable radio device equipped with a feedback control circuit that automatically controls a power amplification section based on the output, when a booster amplifier is connected to the portable radio device to increase the transmission output. , provided in the logic section and the reference voltage generation circuit,
means for detecting connection of a booster amplifier and outputting as a reference voltage an analog voltage representing a transmission output level determined by the station class mark of the booster amplifier and the transmission output setting control signal; means for superimposing the reference voltage on a high-frequency feed line for sending high-frequency power from a power amplification section of a wireless device to the booster amplifier; provided in the booster amplifier; A mobile radio communication device comprising: means for separating the reference voltage; and means for feedback controlling the power amplification section of the booster amplifier using the separated reference voltage as a reference.