JPH0821869B2 - Wireless communication device and booster for wireless communication device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device equipped with a booster and a portable wireless device detachable from the booster, and a booster used in the wireless communication device. The present invention relates to transmission power control by a combination of a portable wireless device for a digital car phone and a vehicle-mounted booster, in particular.

[0002]

2. Description of the Related Art A booster amplifies power by receiving a transmission output from a portable wireless device.

Conventionally, in transmission power control by a combination of a portable radio for an analog car telephone and a vehicle-mounted booster,
On the in-vehicle booster side that takes in the output signal from the portable wireless device, a part of the amplified signal in the power amplification unit is detected and error-amplified so that the transmission output is constant, and a part of the power supply system of the power amplification unit is detected. It was controlled and operated.

The analog car telephone system is conventionally F
Since the M modulation method is adopted, the power amplification section operates in a saturated state, and it is good to keep the output power constant by the above method.

FIG. 2 shows an example of a conventional transmission power control method.

Reference numeral 1'denotes a portable radio device, and 2'denotes an in-vehicle booster. Reference numeral 12 'is a power amplifier, 13' is a power detector, 14 'is a filter, and 15' is an antenna. Reference numeral 16 'is a power control unit, 17' is a transmission output connection terminal when the vehicle-mounted booster is connected, and 18 'is a power control information input / output terminal when the vehicle-mounted booster 2'is connected. 21 'is a power control information input / output terminal at the time of mobile connection, 22' is a transmission output connection terminal from the portable device at the time of booster connection, 23 'is a power control section, 24' is a power amplification section, 25 'is a power detection section. , 26 'are filter parts, 2'
7'denotes an antenna.

When only the portable radio device 1'is used, power control is performed by extracting a part of the signal power-amplified by the power amplification unit 12 'by the power detection unit 13' and detecting it by a diode or the like to generate a direct current. The signal converted into the signal level is sent to the power control unit 16 ', and the power control unit 16' has a built-in reference signal level serving as a reference, and the reference signal level and the DC signal sent from the power detection unit 13 '. The level is compared, and the difference is error-amplified to control a part of the power supply system of the power amplification unit 12 ', whereby the transmission output from the antenna 15' is held at a constant value.

In the combination of the portable wireless device 1'and the vehicle-mounted booster 2 ', the transmission output signal having a constant value due to the above-described operation of the portable wireless device 1'is transmitted through the transmission output connection terminal 17' and the transmission output connection terminal 22 is formed. Be sent to At this time, the transmission output connection terminals 17 'and 22' are connected to each other, and the power control information input / output terminals 18 'and 21' are connected to each other, and at the same time, the filter unit 14 'is connected to the antenna 1
The transmission line to 5'is disconnected and the transmission output connection terminal 17 '
Have a means to switch to the transmission line to.

The signal sent through the transmission output connection terminal 22 'is power-amplified by the power amplifier 24', and the power detector 25 'controls the power level of the DC signal in the same manner as the operation of the power detector 13'. It is sent to the section 23 '. The power control unit 23 'maintains a constant signal output from the antenna 27 by performing the same operation as that of the power control unit 16'.

The operation of connecting the terminals 18 'and 21' is used when it is desired to change the signal output of the antenna 27 by about 30 dB.

Only the power control of the vehicle booster 2'is 30
Since it is difficult to control the dB, when the output voltage is below a certain specified signal output level, the operation of lowering the output signal level of the portable wireless device 1'is performed by the power control sections 23 'and 16'. As the operation, the above-mentioned operation is performed when the antenna 27 obtains a predetermined signal output or more.

Next, the antenna 27 outputs below a certain specified value.
In order to obtain, the output level of the portable wireless device 1'is changed to a level determined by design in advance. The level is changed by changing the reference voltage of the power control unit 16 'to a predetermined value. The power control unit 23 'also performs the same operation to reduce the transmission output of the antenna 27.

By performing the above combination operation, 3
It also supports transmission output changes of about 0 dB.

As a known example of the prior art, Japanese Patent Publication No.
There are those disclosed in Japanese Patent Publication No. 201617 and Japanese Patent Publication No. 3-933, which are examples of arrangement of the example of FIG. 2 described above.

[0015]

In the transmission power control in which the portable wireless device and the vehicle-mounted booster are combined in the conventional analog mobile phone, the power amplification method utilizing the property of the FM modulation method is used, and therefore the same method is applied to the digital vehicle. When trying to use in a transmission power control that combines a mobile wireless device on a telephone and a vehicle-mounted booster, the power amplification unit needs to perform linear amplification because the modulation system is a π / 4 shift QPSK system. If the output level of the above is sent to the vehicle booster as it is for power amplification, there is a disadvantage in that the vehicle booster unnecessarily needs a power amplifier having a high saturation output level.

Further, in the method of controlling the power level by controlling the power supply voltage of the power amplifier, only the power amplified signal level is focused, and although the linearity is not a problem, in the case of transmitting the QPSK signal. However, in the case of this method, there is a drawback that the linearity deteriorates.

An object of the present invention is to provide a radio communication device capable of obtaining a specified output without increasing the saturation output level of the power amplification section of the booster.

Another object of the present invention is to provide a booster for a wireless communication device which can obtain a specified output without increasing the saturation output level of the power amplification section of the booster.

[0019]

According to the present invention, in a wireless communication device equipped with a booster and a portable radio device which can be attached to and detached from the booster, the portable radio device changes the signal level of a modulated signal into linearity of the signal. While adjusting the level, a radio power amplifier for amplifying the output signal of the level adjuster, and a part of the output signal of the radio power amplifier for processing and sending. a radio power detector and the remaining signal to be sent as it removes the unwanted spurious of the remaining signal from the wireless device power detection unit, from the removed unwanted spurious in de state to the booster of the portable radio device signal lead to internal antenna, a signal from the removed unwanted spurious in wearing state to the booster of the portable wireless device to direct the booster, Den A radio filter unit switching the road,
When the portable wireless device is attached to the booster, in response to an electric power information signal received from the booster, an adjustment level instruction is sent to the level adjustment unit to release the portable wireless device from the booster. And a power control unit that sends an adjustment level instruction to the level adjustment unit in response to the processed signal from the wireless device power detection unit, and the booster receives from the wireless device filter unit. A booster power amplification unit that amplifies the power of the signal from which unnecessary spurious is removed, and a part of the output signal of the booster power amplification unit is extracted and processed and transmitted,
A booster power detection unit that sends the remaining signal as it is, a booster filter unit that removes unnecessary spurious of the remaining signal from the booster power detection unit, and guides the signal from which unnecessary spurious is removed to a booster antenna, and the booster power detection unit. The processed signal from the booster
A power information conversion unit for converting the power information signal into a power information signal having a signal form suitable for transmission to the portable wireless device and transmitting the power information signal to the power control unit. A wireless communication device is obtained.

Further, according to the present invention, the booster and the portable radio device detachable from the booster are provided, and the portable radio device adjusts the signal level of the modulated signal while maintaining the linearity of the signal. , A radio power amplifier that amplifies the power of the output signal of the level adjuster, and a radio power that extracts and processes a part of the output signal of the radio power amplifier and sends the rest signal as it is. a detecting unit to remove the unwanted spurious of the remaining signal from the wireless device power detection unit, wherein in the de state to the booster of a portable wireless apparatus directs a signal that has been removed unwanted spurious internal antenna, the portable radio the signal from the removed unwanted spurious to direct said booster in wearing state to the booster of the machine, the radio filter unit for switching the transmission path, In the state where the portable wireless device is attached to the booster, in response to the power information signal received from the booster, an adjustment level instruction is sent to the level adjustment unit to release the portable wireless device from the booster. In the booster used in the wireless communication device, the power control unit that sends an adjustment level instruction to the level adjustment unit in response to the processed signal from the wireless device power detection unit. , A booster power amplification unit that performs power amplification of a signal from which unnecessary spurious components received from the radio filter unit are removed, and a part of an output signal of the booster power amplification unit is extracted and processed, and the remaining signal is The booster power detection unit that outputs the signal as it is and the unnecessary spurious of the remaining signal from the booster power detection unit are removed to remove the unnecessary spurious. And the booster filter portion for guiding the removed signal to the booster antenna, a processed signal from the booster power detection unit, the blanking
Signal format suitable for sending from the broadcaster to the portable wireless device
A booster for a wireless communication device, comprising: a power information conversion unit that converts the power information signal to the power control unit and sends the power information signal to the power control unit.

[0021]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Reference numeral 1 denotes a power controller of the portable wireless device. 11 is a level adjuster, 12
Is a power amplifier, 13 is a power detector, 14 is a filter,
Reference numeral 15 is an antenna, 16 is a power control unit, 17 is a transmission output connection terminal, and 18 is a power information signal input terminal. Reference numeral 2 indicates a power control portion of the vehicle-mounted booster. 21 is a power information signal output terminal, 22 is a transmission input connection terminal, 23 is a power information conversion unit, 25 is a power detection unit, 26 is a filter unit, and 27 is an antenna.

The operation when only the portable wireless device 1 is used will be described below.

The modulated signal is level-adjusted by the level adjusting unit 11 to a signal level amount based on the instruction signal from the power control unit 16, power-amplified by the power amplifying unit 12, and sent to the power detecting unit 13. A part of the signal sent to the power detection unit 13 is taken out and detected to be a low frequency level signal, which is sent to the power control unit 16. On the other hand, the remaining signal sent to the power detection unit 13 is sent to the filter unit 14 as it is, unnecessary spurious is removed, and sent to the antenna 15 to be emitted as a radio wave. The power control unit 16 receives the signal from the power detection unit 13,
A level change amount instruction signal is sent to the level adjustment unit 11 by comparing with a reference inside the power control unit 16. The level adjusting unit 11 includes the power control unit 16
The level is changed in accordance with the instruction from, and the antenna 15 operates so that the average power becomes constant. However, since the modulation method is π / 4 shift QPSK, the average power is kept constant in PN pattern transmission. This is because the level is changed when the signal pattern is changed.

Next, the combination operation with the vehicle-mounted booster 2 will be described below. First, when the portable wireless device 1 and the in-vehicle booster 2 are connected, the filter unit 14 switches from the transmission path to the antenna 15 to the transmission path to the transmission output connection terminal 17. The power control unit 16 switches the signal from the power detection unit 13 to the signal from the power information signal input terminal 18. Then, the modulation signal by the level adjusting unit 11 that has received the level changing instruction signal issued from the power control unit 16 receives a power information signal transmitted from the power information converting unit 23, the level changing, the power amplifier 12 After the power is amplified in (1), the power detecting section 13 is swept to remove spurious in the filter section 14, and then is amplified in power in the power amplifying section 24 via the terminals 17 and 22. The signal power-amplified by the power amplifier 24 is partially extracted by the power detector 25, and at the same time converted into a low frequency signal and sent to the power information converter 23. The power information conversion unit 23 has a signal form suitable for sending to the power control unit 16 via the terminals 21 and 18 (for example, the power detection unit 25 removes only harmonic components of a low frequency signal). The signal is converted into a low frequency signal or data having an appropriate bit length, etc. and transmitted.
On the other hand, in the power detection unit 25, the remaining signal is sent to the filter unit 26 as it is, after removing the spurious, it is sent to the antenna 27 and emitted as a radio wave.

[0026]

As described above, according to the present invention,
To return a signal level information from the power amplifier of the booster when connecting the portable radio and the booster on the side of the portable radio, the level is adjusted at the input of the power amplifier of the portable radio, booster side power amplifier The saturated output characteristic in the part does not have to be excessive. Also, varying the transmission output of the booster by about 30 dB can be satisfactorily performed in the present invention.

[Brief description of drawings]

FIG. 1 is a block diagram of a wireless communication device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional wireless communication device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable radio device 2 In-vehicle booster 11 Level adjustment part 12 Power amplification part 13 Power detection part 14 Filter part 15 Antenna 16 Power control part 17 Transmission output connection terminal 18 Power information signal input terminal 21 Power information signal output terminal 22 Transmission input connection terminal 23 power information conversion unit 24 power amplification unit 25 power detection unit 26 filter unit 27 antenna

Claims (2)

[Claims] 1. A wireless communication device comprising a booster and a portable wireless device attachable to and detachable from the booster, wherein the portable wireless device includes a level adjusting unit for adjusting a signal level of a modulated signal while maintaining linearity of the signal. , A radio power amplifier for amplifying the power of the output signal of the level adjuster, and a radio power for extracting and processing a part of the output signal of the radio power amplifier and transmitting the rest of the signal as it is. a detecting unit to remove the unwanted spurious of the remaining signal from the wireless device power detection unit, a signal from the removed unwanted spurious in de form <br/> state to the booster of the portable radio to the internal antenna lead, a signal from the removed unwanted spurious in wearing <br/> state to the booster of the portable wireless device to direct the booster, radio off to switch the transmission path The filter section and the booster of the portable wireless device in response to the power information signal received from the booster when the portable wireless device is attached to the booster. And a power control unit that sends an adjustment level instruction to the level adjustment unit in response to the processed signal from the wireless device power detection unit when the booster is the wireless device. A booster power amplification unit that amplifies the power of the signal from which unnecessary spurious components received from the filter unit are removed, and a booster power amplification unit that extracts and processes a part of the output signal of the booster power amplification unit and sends the rest signal as it is. An unnecessary spurious of the remaining signal from the power detection unit and the booster power detection unit is removed, and a signal from which the unnecessary spurious is removed is blocked. And the booster filter portion for guiding the static antenna, the processed signal from the booster power detector, the
Signal format suitable for sending from the booster to the portable radio device
And a power information conversion unit that converts the power information signal to the power control unit and sends the power information signal to the power control unit. 2. A booster and a portable wireless device attachable to and detachable from the booster, wherein the portable wireless device adjusts the signal level of the modulated signal while maintaining the linearity of the signal, and the level adjusting unit. A radio power amplification section for amplifying the power of the output signal of the radio signal, a radio power detection section for extracting and processing a part of the output signal of the radio power amplification section, and transmitting the remaining signal as it is, remove unwanted spurious of the remaining signal from radio power detection unit, in the de-shaped <br/> state to the booster of the portable radio device directs the signals from the removed unwanted spurious inside antenna, the portable radio the signal from the removed unwanted spurious to direct said booster in wearing <br/> state to the booster of the machine, the radio filter unit for switching the transmission path, the mobile In a state where the wire machine is attached to the booster, in response to a power information signal received from the booster, an adjustment level instruction is sent to the level adjustment unit, and when the portable wireless device is in a state of being disconnected from the booster, In the booster used in a wireless communication device, comprising: a power control unit that sends an adjustment level instruction to the level adjustment unit in response to a processed signal from the wireless device power detection unit, A booster power amplification section that amplifies the power of the signal from which unnecessary spurious signals have been removed from the radio filter section, and a part of the output signal of the booster power amplification section is extracted and processed, and the remaining signal is sent as is. The booster power detection unit and the unnecessary spurious of the remaining signal from the booster power detection unit are removed, and the unnecessary spurious is removed. And the booster filter portion for guiding the signal to the booster antenna, a processed signal from the booster power detector, the
Signal format suitable for sending from the booster to the portable radio device
And a power information conversion unit that converts the power information signal to the power control unit and sends the power information signal to the power control unit.