JPS6064539A - Radio equipment - Google Patents

Abstract

PURPOSE:To compensate the attenuation due to rainfall with simple constitution by increasing transmission power when the reduction of a received electric field due to rainfall is the 1st setting value or below and restoring the transmission power when the received electric field reaches the 2nd setting value or over. CONSTITUTION:When the reception electric field of an own station A and an opposite station B is decreased by 20dB from a normal value, a control panel 5 of each station sets the transmission power so as to be increased by 10dB by using a control voltage TX PWR CONT to increase the transmission power of each transmitter 1 (A B). In this case, each transmission power is increased by 10dB after the setting is kept for a time sufficiently larger than the difference between control times of each radio equipment. When the received electric field is increased afterward and reaches the 2nd setting voltage (point c) or over, each control panel 5 restores the transmission power of each station.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radio device, and more particularly to a radio device devised to increase transmission power in order to relieve rain attenuation to some extent during one rainfall event.

Radio equipment sometimes transmits with lower transmission power for the purpose of reducing nonlinear distortion.

In such cases, especially when using a frequency band of 10 GHz or higher, attenuation due to rain often occurs1, and in this case, the signal-to-noise ratio of the signal decreases significantly due to thermal noise in the receiver, and the signal-to-noise ratio due to nonlinear distortion increases. The decline is also much larger 1
It may become a problem.

The present invention has been made in view of the above circumstances, and therefore, an object of the present invention is to provide a novel means capable of solving the above problems.

In order to achieve the above object, the wireless device according to the present invention increases the transmission power when a reception electric field is received with a power lower than a set first value during rain. Even if the received electric field returns to normal due to power increase, it detects that the transmitting power of its own station has increased, determines that the transmitting power of the opposite station has increased, and lowers the transmitting power of its own station. If the received input electric field increases beyond the set second value due to attenuation due to rain decreasing after a certain period of time has passed, the transmitting power is returned to its original value.

Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram of the operation. In FIG. 1, reference numeral A indicates the own station, B indicates the opposite station that faces the own station, and each station A, B has a transmitter 1, a receiver 2, a duplexer 3, and an antenna 4. and a control panel 5.

First, the receiving electric field between the own station and the opposite station B is normal (-40 dBm).
) Suppose that the received electric fields of the local station and the opposite station B have decreased by 20 dB from the case where the transmission power is also normal (point A in Fig. 2). At that time, the control panel 5 of each station outputs a control voltage TX PWRC0NT for increasing the transmission power of each transmitter 1.
is set so that the transmission power is increased by xodll according to FIG. After holding the settings for a time sufficiently large to account for the difference in control time of each radio, increase the transmit power of each radio to 10
Increases by dB. The reason for doing this is, for example, to avoid a situation in which it is impossible to measure the increase in the power of the opposite transmitter 1 if the transmission power of the own station increases quickly and the opposite receiver 2 becomes normal. As a result, the receiving input electric field of each receiver 2 is -60+10=-50 dBm.
Move to point B in the diagram. Assuming that the received electric field reaches the 0 point after transition L7 as shown by the dotted line in Fig. 2, each control panel 5 uses a controller to restore the transmission power based on the transmission power of its own station A and the opposite station B.
- Set the Lumi pressure TXP■C0NT.

After maintaining the settings for a time that is sufficiently longer than the difference in control time of each radio, each transmit power is restored to its original level. Note that the solid line in FIG. 2 is the case where each transmission power is not increased. Furthermore, in order to prevent chattering, the receiving input electric field at point D must be higher than that at point A.

As explained above, according to the present invention, it is possible to obtain a radio device that compensates for rain attenuation to some extent with a simple configuration, and
This is particularly effective for radio equipment that uses frequency bands of GHz or higher.

[Brief explanation of the drawing]

1s1 is a system configuration diagram of a radio device for explaining an embodiment of the present invention, and FIG. 2 is a diagram showing the reception input electric field (including the case of increased transmission power). A...own station, B...opposite station, l...transmitter, 2.
... Receiver, 3... Dual transmitter/receiver, 4... Antenna,
5. Applicant for Yusu leg plate patent agent: NEC Co., Ltd. Patent attorney: Yutabe Kumagai

Claims (1)

[Claims] In radio equipment that uses a frequency band where radio wave attenuation due to atmospheric fading is more dominant, the received electric field is lower than the first set value due to radio wave attenuation due to rain. generates a signal that increases the transmission power to a certain set value when When the attenuation of radio waves due to rain decreases and the received electric field exceeds a set second value, a signal is generated to restore the transmit power, and after a certain time delay, the station returns to its own station. 1. A radio device comprising means for applying a control voltage to the transmitter to substantially simultaneously restore transmission power to the transmitter.