JPH0220126A - Radio repeater - Google Patents

Abstract

PURPOSE:To reduce the number of filters and to miniaturize a device by adopting the constitution to use selectively the filter of the necessary band or the band width with a switch matrix. CONSTITUTION:After plural respective receivers 1 to receive plural signal waves with a different frequency and convert them to an intermediate frequency for respective input channels, only a filter F of the whole band width is placed, respective filter outputs are connected to a switch matrix 3, a part of the output of the switch matrix 3 is connected to filters Fu and Fd with mutually different band or band width and the filter output is connected to the switch matrix 3 again. Two signals from a channel #1 are inputted through a receiver 1 and a filter 2 of a whole band F to the switch matrix 3 and outputted to #6. The signal inputted to the #6 is divided into two, band-limited with a band limit filter 2 having bands Fu and Fd respectively, and respective outputs are inputted to the switch matrix 3. The output of the band Fu is outputted to a transmitter 5 connected to a #d and the output of the band Fd is outputted to the transmit ter 5 connected to a #c.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a relay device having a mutual switching connection function between different routes in a wireless relay system such as satellite communication.

[Conventional technology]

FIG. 3 is a diagram showing an example of the configuration of a conventional wireless relay device.

In the figure, #1 to #4 are input signal paths, 51 is a receiver that performs low-noise amplification of the input signal and frequency conversion from the received frequency loss to an intermediate frequency, 52 is a band-limiting filter, 53 is a switch matrix, 54 is a terminator, 55 is a transmitter that performs frequency conversion and amplification from an intermediate frequency to a transmission frequency, and #a to #e are output paths.

The symbols F and Fu*Fd attached to the band-limiting filter 52 indicate the total bandwidth of the receiver as F, one side of the 1/2 bandwidth as Fu, and the other side as 11Fd, and the band-limiting filter 52 is this 3 as shown in the same figure.
have one of the following bandwidths:

An example of the configuration of the cross points of the switch matrix 53 is tJ%
Shown in Figure 4.

In the figure, 56 represents a power coupler, 57 a switch having two states of on and off, 58 an input line, and 59 an output line.

In the figure, when the switch 57 is on, the input line 58 and the output line 59 are connected through the two power combiners 56, and when the switch 57 is off, the input line 58 and the output line 59 are not connected. That will happen.

Further, the input signal coming from the left end of input #i 58 is connected to the right end through the power coupler 56 regardless of the on/off state of the switch 57, and is transmitted to the next cross point. Output line 5
The output signal coming from the upper end of the switch 9 is also connected to the lower end through the power combiner 56, regardless of the on/off state of the switch 57, and is transmitted to the next cross point. Each crosspoint in the switch matrix 53 in FIG. 3 is a crosspoint shown in FIG. 4,
The black triangle mark indicates that this fork point is in the on state.

FIG. 5 is a diagram showing the frequency arrangement of each signal shown in FIG.
lu, f Id, #2 has f2 of the entire band,
#3 has 1/2 bandwidth f 3u .

A case is shown in which f4 of the full bandwidth is input to f3d and I4.

The signal flow will be explained below based on FIGS. 3 and 5.

The two signals from path #1 are low-noise amplified by the reception fi 51, converted to an intermediate frequency, divided into three, and band-limited by a band-limiting filter 52 having bands F, Fu, and Fd, respectively.

The outputs of the three band-limiting filters 52 are respectively input to the switch matrix 53, the output signal of the band F is absorbed by the terminator 54, and the output of the band Fu is sent to the transmitter 55 connected to #d. The output should be sent to transmitter W155 connected to stirring C.

Regarding #2, the outputs of bands Fu and Fd are connected to the terminator 54.
and only the output of band F is connected to the transmitter 55 connected to #e.

Regarding #3, the output of band F is absorbed by the terminator 54, and the output of band Fu is connected to the transmission (fNj!ss
The output to band Fd is output to transmitter W155 connected to #a.

Regarding #4, the outputs of bands Fu and Fd are absorbed by the terminator 54, and only the output of band F is connected to the transmitter 5 to #b.
Connected to 5.

Among transmission R55, #cl: those connected are f3u,
The two signals of fld are commonly amplified.

[Problem to be solved by the invention]

As described above, in conventional wireless relay devices, multiple signals from the same route are connected to different routes, and signals from different routes are connected to the switch matrix 5.
3 are connected to the same path, and then common amplification is performed at the transmitter 55.

In such a conventional configuration, a filter must be placed after each receiver in every input signal path, so the number of paths through which multiple signals are input is always less than a certain percentage of the total, and the frequency In the case of a system that does not have a large amount of space, there are disadvantages in that there is a lot of wasted equipment and that the size of the '4' and 4' positions becomes large.

In view of these conventional problems, the present invention provides a function for connecting multiple signals from the same route to different routes, and for common amplification by a transmitter after connecting signals from different routes to the same route. It is an object of the present invention to provide a wireless relay device that enables miniaturization of the device without impairing the performance.

[Means to solve the problem]

According to the invention, the above objects are achieved by the means specified in the claims.

That is, the present invention provides a wireless relay device that has m input paths and n output paths and mutually switches and connects the input and output paths, and for each input path, a plurality of A plurality of receivers each receiving a signal wave and converting each received frequency into an intermediate frequency are connected to j input terminals (j>m
) is connected to m input terminals of j input terminals of a switch matrix having output terminals (k>n), and the switch matrix has j×k intersection points and is connected to an arbitrary intersection. The (k−n) outputs of the switch matrix are configured such that connection or disconnection between corresponding input and output terminals can be switched at a point, and the (k−n) outputs of the switch matrix divide each output into multiple powers, and for each power division, Bandwidth limitation is applied to (j−
m) outputs are connected to the remaining (j−m) input terminals of the switch matrix, and the filter outputs are connected to the remaining (j−m) input terminals of the switch matrix;
A wireless relay whose output terminals are connected to n transmitters that convert the intermediate frequency to a transmission frequency and amplify it to the required transmission power! ! It is a place.

[For production]

The present invention places only a full-bandwidth filter after each receiver, connects each filter output to a switch matrix, connects some of the outputs of the switch matrix to filters with different bands or bandwidths, and The filter output is connected again to the switch matrix.

In the conventional system, it was necessary to connect filters with different bands or bandwidths after each receiver, but the present invention uses a switch matrix to selectively use filters with the required band or bandwidth. The configuration is as follows. Therefore, the number of filters can be reduced, and the size of the apparatus can be reduced.

〔Example〕

FIG. 1 is a diagram showing one embodiment of the present invention, #1 to
#6 is the input signal path, 1 is the receiver that performs low-noise amplification of the input signal and frequency conversion from the receiving frequency to the intermediate frequency, 2 is the band-limiting filter, 3 is the switch matrix, 4 is the terminator, and 5 is the intermediate frequency. A transmitter performs frequency conversion and amplification from a frequency to a transmission frequency, and #a to #e indicate output paths.

Symbols F and Fu given to the band-limiting filter 2.

Fd indicates the total bandwidth of the receiver as F, one half of the bandwidth as Fu, and the other half as Fd.

A filter with band F is connected after receiver 1, and filters with bands Fu and Fd are connected to input paths #5 and #6, respectively.

Further, as in FIG. 3, the black triangle indicates that α is in the on state.

The fjS2 diagram is a diagram showing the frequency arrangement of each signal shown in FIG. 1, and as in the case of the conventional example shown in FIG. fl u r
f ld 1 Full bandwidth f2 for #2, 1 for #3
/2 bandwidth f3u, f3d.

#4 shows the case where f4 of the entire bandwidth is input.

The signal flow will be explained below based on FIGS. 1 and 2.

The two signals from path #1 are low-noise amplified in receiver 1, converted to an intermediate frequency, and then passed through full-band F filter 2.
The signal passes through, is input to switch matrix 3, and is output to #6. The signal input to #6 is divided into two, each having a band Fu.

Band-limiting is performed by a band-limiting filter 2 having Fd, and each output is input to a switch matrix 3.

The output of the band Fu is sent to the transmitter 5 connected to #d.
The output of d is output to the transmitter 5 connected to #C.

Regarding #2, the output of band F is output to transmitter 5 connected to #e.

Regarding #3, the signal is output to #5 after passing through the full band filter 2, and the signal input to #5 is divided into two, and the signal is divided into two,
The output of u is output to the transmitter 5 connected to #C, and the output of band Fd is output to the transmitter 5 connected to #a.

Regarding #4, the output of band F is output to transmitter 5 connected to #b.

In this way, if the number of paths to which multiple signals of 1/2 bandwidth are simultaneously input among the four input signal paths #1 to #4 is two or less, the same method as in the case of Fig. 3 is applied. While maintaining the same functions, the number of filters can be reduced from 12 to 8 compared to the one in Figure 3, and the size of the switch matrix can also be reduced from 12 x 5 to 8 x 7. becomes.

〔Effect of the invention〕

As explained above, according to the present invention, a wireless radio having a function of connecting multiple signals from the same route to different routes, and common amplification by a transmitter after connecting signals from different routes to the same route. In a system in which multiple relay devices (number i) are input on the same route infrequently, the number of filters in the relay device can be reduced compared to the conventional case where a filter is provided for each route.
The weight of the entire device can be reduced.

Therefore, it is particularly effective for relay equipment RA mounted on a satellite in the field of satellite communications where there is a weight limit and weight reduction is required.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing a signal frequency arrangement, Pt53 is a diagram showing an example of the configuration of a conventional wireless relay device, and FIG. FIG. 4 is a diagram showing an example of the configuration of the cross points of the switch matrix, and FIG. 5 is a diagram showing the frequency arrangement of signals. 1... Receiver, 2...
Band-limiting filter, switch matrix, 4...Terminator, transmitter,

Claims (1)

[Claims] A wireless relay device that has m input paths and n output paths and mutually switches and connects the input and output paths, wherein each input path has a plurality of A plurality of receivers each receiving a signal wave and converting each received frequency into an intermediate frequency are connected to j switches of a switch matrix having j input terminals (j>m) and k output terminals (k>n). The switch matrix is connected to m input terminals among the input terminals of The (k−n) outputs of the switch matrix are connected to filters having (j−m) outputs that divide each output into multiple powers and perform band limitation for each power division. , the filter output is the residual (j−
m) input terminals, and the remaining n output terminals of the switch matrix are connected to n transmitters that convert the intermediate frequency into a transmission frequency and amplify it to the required transmission power. A wireless relay device characterized by: