KR960015845B1 - Connecting device in base - Google Patents

Abstract

The interface connects a client to the local base by mixing the transceiving IF(Intermediate Frequency) with the control and alarm signals and by using two signal lines, and includes an antenna for a satellite; an antenna interface; an outdoor frequency upward high amplifier for transmitting a signal to the satellite; an outdoor frequency downward low noise amplifier for amplifying the signal received from the satellite; an indoor interface transferring the transmitting IF, a base frequency signal, a burst-transmitting control signal, a transmit level adjust signal and the current through a 1st line and the voltage through a 2ns line, checking the lines to transfer the received IF to the indoor device; an outdoor interface analyzing the signal through the 1st line to process the information signal, transferring the voltage, the transmitting IF and the base frequency signal to the outdoor amplifier, multiplexing the received IF and the line-checking signal through the 2nd line, dividing the voltage to supply the inner circuit and the outdoor amplifier.

Description

Connection device of low speed data terminal terminal station

1 is a structural diagram of a low speed data dedicated terminal earth station according to the prior art;

2 is a structural diagram of a low speed data dedicated terminal earth station connection apparatus according to the present invention;

3 is a detailed configuration diagram of the outdoor connection device according to the present invention.

4 is a detailed configuration diagram of the indoor connection device according to the present invention.

* Explanation of symbols for main parts of the drawings

11: Terminal earth station modem unit

12, 24: Outdoor frequency upward high power amplifier (TBU)

13, 25: Outdoor Frequency Down Low Noise Amplifier (LNB)

14, 26: antenna connection portion 15, 27: antenna

21: Terminal earth station indoor device 22: Indoor connection device

23, 31: outdoor connection device 28, 47: transmission multiple signal transmission line

29, 48: Multiple signal transmission line for reception 32: Demultiplexer

33: Automatic IF gain control circuit part (AGC)

34: Transmit IF Signal Switch 35: On / Off Signal Detector

36: level signal detector 37: level signal amplifier

38: multiplexer 39: constant voltage rectifier

40: transmit IF signal choke circuit portion 41: receive IF signal choke circuit portion

42 low noise amplifier 43 constant current rectifying circuit

45: reference frequency signal choke 46: RF error monitor circuit

In the present invention, a low-speed data-only earth station terminal station uses two signal lines by multi-signal mixing of transmission and reception IF (Intermediate Frequency) signals and various control and alarm signals that connect an indoor device to an outdoor device. It relates to a connecting device to be connected.

The conventional low speed data dedicated terminal earth station has no structure in which an outdoor connection device is not used. That is, conventionally, as a modem unit, a modulator for signal transmission and a demodulator for signal reception are provided. In addition, a plurality of signal lines are used to connect a plurality of signals required between the frequency uplink high power amplifier (TBU) and the frequency downlink low noise amplifier (LNB) connected to the feeder of the antenna as the outdoor equipment.

However, such a conventional structure has a problem in that the connection relationship is complicated by using a structure using a plurality of signal lines supplied with high frequency IF signals.

Looking at the prior art described in detail through Figure 1 as follows.

The terminal earth station modem section 11 shown in the figure provides the outdoor frequency upward high output amplifier 12 with a high output voltage for amplification, a transmission IF signal and a reference frequency signal through a plurality of respective signal lines, and through a reference frequency signal path. An alarm is provided for an abnormal condition of the outdoor frequency upward high power amplifier 12. Then, the receiving IF signal is received from the outdoor frequency down low noise amplifier 13 and constant voltage power is supplied to the outdoor frequency down low noise amplifier 13. The antenna connection unit 14 receives a transmit radio frequency (RF) signal from the outdoor frequency down high power amplifier 12 and transmits the RF signal to the satellite through the antenna 15, and transmits the RF signal received from the satellite through the antenna 15 to the outdoor frequency down. The low noise amplifier 13 is provided.

Accordingly, the present invention has been made in order to solve the above problems of the prior art, the low speed for connecting the signals necessary to form a connection structure of outdoor equipment and indoor equipment using only two signal lines using a multi-signal mixing method It is an object of the present invention to provide a connection device for a data-only terminal earth station.

The present invention to achieve the above object, the antenna for transmitting and receiving a signal with a satellite; Antenna connection means for providing a connection with the antenna; Outdoor frequency upward high power amplifying means for amplifying a signal to be transmitted to the satellite through the antenna connecting means and the antenna; A low-speed data dedicated terminal earth station having an outdoor frequency downlink low noise amplifying means for amplifying a signal received from the satellite through the antenna and the antenna connecting means, comprising: a transmission intermediate frequency (IF) signal and a reference frequency signal connected to indoor equipment; And multiplexing a control signal for burst transmission processing, an information signal adjusting a transmission level, and a constant current through a first transmission line, and transmitting a constant voltage received from the indoor equipment through a second transmission line. An indoor connection device for determining whether there is an abnormality of a transmission line and transmitting a received intermediate frequency (IF) signal to the indoor equipment after demultiplexing and decomposing multiple signals through a second transmission line; After demultiplexing and demultiplexing the multiple signal inputted from the indoor connection device through the first transmission line, processing the control signal for burst transmission processing and the information signal for adjusting the transmission level, and the constant voltage converted from the constant current, Transmits an intermediate frequency (IF) signal and a reference frequency signal to the outdoor frequency uplink high output amplifying means, and multiplexes a received intermediate frequency (IF) signal inputted from the outdoor frequency downlink low noise amplifying unit and a signal for determining whether a transmission line is abnormal. And transmits to the indoor connection device through the second transmission line, and divides the constant voltage input from the indoor connection device through the second transmission line to an internal circuit, the outdoor frequency uplink high output amplification means, and the outdoor frequency downlink low noise amplification means. It is provided with the outdoor connection device supplied.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a structural diagram of a low speed data terminal earth station to which the present invention is applied. In the drawing, "21" is an indoor device, "22" is an indoor device, "23" is an outdoor device, and "24" is an outdoor frequency upward. A high power amplifier, "25" denotes an outdoor frequency down low noise amplifier, "26" denotes an antenna connection, "27" denotes an antenna, "28" denotes a transmission multiple signal transmission line, and "29" denotes a reception multiple signal transmission line.

The structure of the low-speed data dedicated terminal earth station shown in the figure includes a transmission IF signal of the indoor equipment 21, a reference frequency signal, a burst control signal, an information signal for adjusting the transmission level, and a constant current for an outdoor frequency upward high output amplifier. It is transmitted to the indoor connection device 22, mixed with multiple signals, and transmitted to the outdoor connection device 23 attached to the antenna via the transmission line 28. This is where the signals are decomposed and sent to constant voltage, transmit IF signals, and reference frequency outdoor frequency uplink high output amplifiers 24.

The functions of the antenna connection 26 and the antenna 27 and the outdoor frequency downward low noise amplifier 25 are the same as in FIG.

The received IF signal through the outdoor frequency down low noise amplifier 25 is mixed with a multi-signal together with a signal for determining whether a transmission line is abnormal in the outdoor connection device 23 and transmitted to the indoor connection device 22 through the transmission line 29. . The transmitted signal is decomposed by the indoor access device 22 to determine whether there is an abnormality in the transmission line, and the received IF signal is transmitted to the indoor equipment 21. The indoor equipment 21 provides a constant voltage to the indoor connecting device 22 and transmits it to the outdoor connecting device 23 through the transmission line 29.

3 is a block diagram of an outdoor connection device according to the present invention, in which "31" is an outdoor connection device, "32" is a demultiplexer, "33" is a transmission IF signal automatic gain adjusting circuit unit, and "34" is a transmission IF signal. Switch, "35" on / off signal detector, "36" level signal detector, "37" level signal amplifier, "38" multiplexer, "39" constant voltage rectifier, "40" transmit IF signal choke The circuit section "41" denotes a reception IF signal choke circuit section, "42" a low noise amplifier, "43" a constant current rectifying circuit section, "45" a reference frequency signal choke and "46" an RF section abnormality monitoring circuit section, respectively. .

In the indoor connection device 22 of FIG. 2, the multiple signals mixed through the multiple signal transmission line 47 for transmission, i.e., the transmission IF signal, the reference frequency signal, the control signal for burst transmission processing, and the transmission level are adjusted. When the signal and the constant current are transmitted, they are demultiplexed and decomposed by the demultiplexer 32. Only when the burst control signal is detected by the on / off signal detector 35, the transmission IF signal switch 34 is turned on to open the transmission path of the IF signal to enable transmission. give. When the transmission level adjustment signal is detected by the level signal detector 36, the information is sent to the transmission IF signal automatic gain adjustment circuit unit 33. When the transmission IF signal switch 34 is ON, the transmission IF signal is adjusted to an output level as required by the level signal detector 36 in the transmission IF signal automatic gain adjustment circuit section 33 so that the transmission IF signal ( 51 is sent to the outdoor frequency upward high power amplifier 24 of FIG. At this time, the constant voltage provided from the indoor equipment 22 through the reception multi-signal transmission line 48 is passed through the multiplexer 38 to be rectified by the constant voltage rectifier 39, which is required for the outdoor frequency upward high power amplifier 24. The voltage is combined with the transmit IF signal in the transmit IF signal choke circuit section 40 and passed to the outdoor frequency upward high output amplifier 24 together with the transmit IF signal 51. The constant current is converted into a constant voltage in the constant current rectifying circuit section 43 and transmitted to the outdoor frequency upward high output amplifier 24 through the high output voltage amplification voltage 49 transmission line. The reference frequency signal is directly provided to the outdoor frequency upward high power amplifier 24 via the reference frequency signal 50 transmission line. At this time, the alarm signal outputted from the outdoor frequency upward high output amplifier 24 and transmitted in the reverse direction to the reference frequency signal is extracted from the reference frequency signal choke 45 circuit and the abnormality is determined by the RF abnormality monitoring circuit 46. If it is an alarm signal, the constant current rectifying circuit unit 43 is cut off to transmit the wrong signal to the satellite of the outdoor frequency upward high output amplifier 24 by blocking the high output amplification voltage 49 sent to the outdoor frequency upward high output amplifier 24. To block.

The received IF signal 52 from the outdoor frequency down low noise amplifier 25 is amplified in consideration of the signal loss that occurs during transmission from the low noise amplifier 42 to the indoors through the receiving multi-signal transmission line 48. 38). At this time, the transmission level adjustment signal passing through the demultiplexer 32 passes through the level signal amplifier 37 because it can determine whether there is a connection abnormality of the transmission and reception multiple signal transmission lines when the signal is returned to the indoor equipment 21. Then, the multiplexer 38 is mixed with the received IF signal and transmitted to the indoor equipment through the reception multi-signal transmission line 48. On the other hand, the voltage rectified by the constant voltage rectifier 39 is synthesized in the reverse direction with respect to the received IF signal by the reception IF signal choke circuit section 41 to the outdoor frequency down low noise amplifier 25 in the reverse direction through the reception IF signal 52 transmission line. Is provided. The constant voltage rectifier 39 also supplies a voltage necessary for the outdoor connection device 23.

4 is a block diagram of an indoor connection device according to the present invention.

The control signals and the transmission IF signal 60 and the reference frequency signal 63 to be transmitted from the indoor equipment to the outdoor equipment are converted through the on / off signal generator 53 and the level signal generator 45 and then multiplexer 62. Is multiplexed with the output of the constant current generator 55 and transmitted as a multiple signal through the multiple signal transmission line 65 for transmission. On the other hand, the constant voltage used in the outdoor equipment is made by the constant voltage generator 56 and passes back through the demultiplexer 57 to be transmitted to the receiving multiple signal transmission line 66. When the multiple signals mixed from the outdoor equipment to the indoor equipment are transmitted through the receiving multiple signal transmission line 66, they are decomposed by the demultiplexer 57 and supplied to the receiving IF signal level compensating circuit 58 and the signal line short confirmation circuit 59. The received IF signal 64 is supplied to the indoor equipment 21.

Therefore, the present invention configured and operated as described above has the following unique effects by implementing the outdoor connection device required for the two-wire connection structure.

First, by processing the multiple signals through a multiplexer and a demultiplexer, a structure capable of providing a plurality of signals required for outdoor equipment with two transmission line connecting films is realized, thereby simplifying the installation structure of the system and reducing the overall cost.

Secondly, a maintenance-free structure is realized by processing a level signal that can determine whether a transmission line is abnormal in a two-wire connection.

Third, by supplying power to the outdoor frequency upward high output amplifier after receiving the constant current and rectifying it to a constant voltage, it provides a structure that satisfies even if the current consumption of the outdoor frequency upward high output amplifier varies depending on the state of the outdoor frequency upward high output amplifier. .

Fourth, by providing an automatic gain adjustment circuit outdoors to compensate for the transmission IF signal loss caused by the transmission line, it is possible to prevent the degradation of transmission performance due to the signal loss of the installation structure.

Fifth, the degradation of the reception performance can be prevented by suppressing the increase in the noise figure caused by the loss of the transmission line before sending the received IF signal from the outdoor frequency- propensity low noise amplifier to the indoor equipment.

Claims (3)

An antenna 27 for transmitting and receiving a signal to and from a satellite; An antenna connection number 26 which provides a connection with the antenna 27; Outdoor frequency upward high power amplifying means (24) for amplifying a signal to be transmitted to the satellite through the antenna connecting means (26) and the antenna (27); A low-speed data dedicated terminal earth station having an outdoor frequency downlink low noise amplifying means 25 for amplifying a signal received from the satellite through an antenna connecting means 26 of the antenna 27, which is connected to the indoor equipment 21. The transmission intermediate frequency (IF) signal, the reference frequency signal, the control signal for burst transmission processing, the information signal for adjusting the transmission level, and the constant current are multiplexed and transmitted through the first transmission line 28. The constant voltage received from the equipment 21 is transmitted through the second transmission line 29. After receiving and demultiplexing and demultiplexing multiple signals through the second transmission line 29, it is determined whether there is an abnormality of the transmission line and the reception intermediate frequency. An indoor connection device 22 for transmitting an (IF) signal to the indoor equipment (21); And demultiplexing and demultiplexing the multiple signals inputted from the indoor connection device 22 through the first transmission line 28 to process the control signals for burst transmission processing and the information signals for adjusting the transmission level. And transmits the constant voltage, the transmission intermediate frequency (IF) signal and the reference frequency signal converted from the constant current to the outdoor frequency upward high output amplifying means 24, and receives the received intermediate frequency (received from the outdoor frequency downward low noise amplifying means 25). IF) signal and a signal determining whether there is a transmission line abnormality are multiplexed and transmitted to the indoor connection device 22 through the second transmission line 29, and the second transmission line 29 is transferred from the indoor connection device 22. The outdoor connection device 23 for dividing the constant voltage input through the internal circuit and the outdoor frequency upward high output amplifying means 24 and the outdoor frequency downward low noise amplifying means 25 is supplied. Access point of the low-speed data-only terminal earth stations, characterized in that is compared. The apparatus of claim 1, wherein the outdoor connection device (23) demultiplexes the mixed multiplex signal supplied from the indoor connection device (22) through the first transmission line (28), and transmits an intermediate frequency (IF) signal, Demultiplexing means (32) for decomposing the reference frequency signal, the control signal for burst transmission processing, the information signal for adjusting the transmission level, and the constant current; Constant current rectifying means (43) for receiving a constant current from the demultiplexing means (32) and rectifying it to a constant voltage and outputting it to the outdoor frequency upward high output amplifying means (24); Alarm signal extracting means (45) for extracting an alarm signal input from said outdoor frequency upward high output amplifying means (24) through a reference frequency signal transmission line; A monitoring means (46) which receives the alarm signal from the alarm signal extracting means (45) and determines whether there is an abnormality and blocks the constant current rectifying means (43) only when an abnormality occurs; Level signal amplifying means (37) for receiving and amplifying an information signal for adjusting a transmission level from the demultiplexing means (32); Level signal detecting means (36) for detecting an information signal for adjusting a transmission level output from said demultiplexing means (32); Transmission intermediate frequency (IF) signal automatic gain adjusting means (33) for adjusting the gain of the transmission intermediate frequency (IF) signal output from the demultiplexing means (32) in accordance with the level signal output from the level signal detecting means (36). ); On / off signal detecting means (35) for detecting a burst control signal output from said demultiplexing means (32); Under the control of the on / off signal detection means 35 of the transmission intermediate frequency (IF) signal output from the intermediate frequency (IF) signal automatic gain adjusting means 33 to the outdoor frequency upward high output amplifying means 24 Transmission intermediate frequency (IF) signal switching means 34 for switching the output; Low noise amplifying means (42) for receiving the received intermediate frequency (IF) signal from the outdoor frequency down low noise amplifying means (25) and outputting the low noise amplified signal; The outputs of the level signal amplifying means 37 and the low noise amplifying means 42 are multiplexed and outputted to the indoor connecting device 22 through the second transmission line 29. Multiplexing means (38) for receiving a constant voltage through two transmission lines (29); Constant voltage rectifying means (39) for rectifying the constant voltage output from the multiplexing means (38) and supplying it to an internal circuit; First signal synthesizing means 40 for synthesizing the constant voltage output from the constant voltage rectifying means 39 with the output of the transmission intermediate frequency (IF) signal switching means 34 and outputting it to the outdoor frequency upward high output amplifying means 24. ); And synthesizing the constant voltage output from the constant voltage rectifying means 39 in a reverse direction with respect to the received intermediate frequency signal input from the outdoor frequency down low noise amplifying means 25 and outputting the reverse voltage to the outdoor frequency down low noise amplifying means 25. And a two-signal synthesizing means (41). 2. The apparatus of claim 1, wherein the indoor connection device (22) comprises: on / off signal generating means (53) for receiving a control signal from outside to generate an operation signal in order to make a transmission intermediate frequency (IF) signal into a burst signal; Level signal generating means (54) for receiving a control signal from the outside and generating a control signal for adjusting a transmission level; Constant current generating means (55) for generating a constant current for use in the outdoor connection device (23); The reference frequency signal of the indoor device 21 and the outputs of the on / off signal generating means 53, the level signal generating means 54, and the constant current generating means 55 are multiplexed through the first transmission line 28. Multiplexing means (62) for transmitting to the outdoor connection device (23); Constant voltage generating means (56) for generating a constant voltage used in the outdoor connection device (23), the outdoor frequency upward high output amplifying means (24) and the outdoor frequency downward low noise amplifying means (25); The output of the constant voltage generating means 56 is transmitted to the outdoor connection device 23 through the second transmission line 29, and input from the outdoor connection device 23 through the second transmission line 29 Demultiplexing means (57) for demultiplexing the signal into a signal for determining a reception intermediate frequency (IF) signal and a transmission line abnormality; Receiving intermediate frequency (IF) signal level compensating means (58) for compensating the level of the received intermediate frequency (IF) signal output from the demultiplexing means (57) and providing it to the indoor equipment (21); And signal line short-circuit checking means (59) for receiving a signal for determining whether there is a transmission line abnormality from said demultiplexing means (57) and checking a signal line short circuit.