JP2836558B2 - Satellite receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the adjustment of the direction of an antenna with respect to a plurality of geosynchronous satellites, and more particularly to its automation.

[0002]

2. Description of the Related Art Conventionally, when installing an antenna for receiving radio channels transmitted from a plurality of geostationary satellites, the antenna is first received in a direction roughly corresponding to the satellite transmitting the radio channel to be received. Adjust the reception of the wireless channel, find the satellite that emits the desired wireless channel using a dedicated measuring device, and emit the wireless channel to be received while storing the control values of the antenna control devices such as the actuator and the polarizer. Similar work was repeated for each satellite by trial and error.

[0003]

SUMMARY OF THE INVENTION
Especially for users who are not familiar with satellite operation, it is not easy to determine the satellite that emits the desired radio channel based on the program contents or scramble method, so it is difficult to set the direction of the antenna for all the desired satellites. Had become.

SUMMARY OF THE INVENTION An object of the present invention is to easily and accurately set the antenna directions for all desired satellites easily without any knowledge of the operational circumstances of the satellite, especially the scrambling method of the radio channel. Such a satellite receiving apparatus is provided.

[0005]

SUMMARY OF THE INVENTION A satellite receiving apparatus according to the present invention includes a scrambling method employed by at least one or more radio channels allocated to a geostationary satellite and information indicating a descrambling state in each of the scrambling methods. Storage means for storing scramble method information; scramble decoder means for descrambling the scramble method of the received radio channel; radio channels to be received and instructions for driving the receiving antennas; and reception radio channels obtained from the scramble decoder means The received radio channel is identified by comparing the information indicating the descrambling state of the received data with the scrambling method information obtained from the storage means, and at least one target radio channel is identified.
There is a control means for controlling the automatic setting of the antenna direction for the geostationary satellite.

[0006] Further, there may be provided scrambling method information obtaining means for externally storing the above scrambling method information in a storage device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, with reference to an example of a satellite broadcast receiving apparatus. FIG. 1 is a block diagram showing a configuration example of a satellite receiver, FIG. 2 is a flowchart showing a procedure for externally storing information on scrambling of each radio channel in a receiver, and FIG. 3 is a satellite receiver of FIG. Is a flowchart showing the procedure for automatically setting the antenna direction in FIG. 4, FIG. 4 is a diagram showing an example of the driving locus of the antenna in the satellite receiver of FIG. 1, and FIG. 5 is a diagram showing an example of the radio channel of each satellite and a scrambling method. is there.

The satellite receiving apparatus shown in FIG. 1 comprises a receiver unit 1 and an antenna unit, and both units are connected by a cable 11. The receiver unit 1 has a tuner 2, a rewritable memory 3, a CPU 4 for controlling the overall operation of the apparatus, a scramble decoder unit 5, a scramble method information input unit 6, and a display unit 7. The antenna unit includes an antenna 8, an antenna 8
, A polarizer 13 for determining a reception polarization plane. The receiver unit 1 and the antenna unit include a cable 11 for connecting the antenna unit reception output to the tuner 2 and the operation of the antenna unit by the CPU 4.
/ Polarization plane control cable 1 for controlling
They are connected by two.

[0009] The received wave from the antenna whose orientation and polarization plane are adjusted by the actuator 10 and the polarizer 13 whose target satellite and the polarization plane are designated by the CPU 4 is sent from the converter 9 to the tuner 2. Tuner 2
Select and demodulate according to the frequency of the receiving channel specified by the CPU 4. In addition, the CPU 4 controls the tuner 2
The operation of the antenna 8 is controlled so that the AGC voltage becomes equal to or higher than the set value. The memory 3 stores information on each wireless channel, the scrambling method adopted by the wireless channels, information on the descrambling state in each scrambling method, control data on antenna azimuth setting for the wireless channel, and the like. Scramble decoder section 5
Descrambles the scrambling method of the reception channel sent from the tuner 2 and sends the descrambling state information to the CPU 4. The CPU 4 compares the descrambling state information with the descrambling state information of each wireless channel stored in the memory 3, and stores the antenna control data for the received wireless channel confirmed as the desired channel by matching the descrambling state information in the memory 3. To be stored.

If the information on the scramble system of each satellite is not stored in the memory 3 before shipment from the factory, it can be input through the scramble system information input unit 6.

In this case, an operation procedure when the scrambling method information of the wireless channel is stored in the memory 3 by the scrambling method information input unit 6 will be described. The operation is performed by controlling the buttons of the scramble information input unit 6 while watching the lamp on the display unit.

In FIG. 2, when the setting mode is first set by a button operation (step 101), the mode is switched to a satellite selection mode, and a satellite is selected by a button operation (step 10).
2). First, when satellite A is selected, the radio channels are selected in the order of A1 channel and A2 channel shown in FIG. 5 (step 103). When each channel is selected, the scrambling method operated by the radio channel is selected. (Step 104), and is confirmed together with information indicating the descrambling state in the method (step 105).
The data is sequentially stored in the memory 3 (step 106). Satellite A
When the storage of the information on the above scrambling method is sequentially completed for each wireless channel, satellite B is selected and B1 is selected.
The scrambling method information is sequentially stored in the order of channel B2. As described above, if necessary,
For example, scramble method information of a wireless channel that has not been stored can be stored in a memory by a user.

Next, a procedure for automatically setting the direction of the antenna with respect to the satellite emitting the desired radio channel will be described with reference to FIG.

In FIG. 3, first, the direction of the antenna is roughly adjusted, and the satellite receiver is set to the receiving state (step 40).
1) When the automatic adjustment mode of the antenna direction is started,
As shown in FIG. 4, the antenna is driven in the elevation and azimuth directions (step 402). With such fine adjustment,
When the AGC voltage of the tuner 2 reaches a value equal to or higher than a predetermined value (step 403), the antenna driving is stopped and the control value for setting the direction is temporarily stored in the memory 3 (step 40).
4).

Next, an attempt is made to receive a radio channel for which reception is to be performed, and it is checked whether or not the AGC voltage is equal to or higher than a predetermined value and the reception is normal (step 405). The descrambling state information indicated by the decoder is compared with the stored scrambling method information (step 406). If it is confirmed that the radio channel being received is the desired channel, the control value of the antenna direction adjustment at that time is stored in the memory. Then, the process proceeds to the direction setting for the next satellite by the same procedure, the control value of the direction adjustment for all the satellites emitting the radio channel to be received is stored in the memory 3, and the direction setting of the antenna is completed.
If it is determined in step 405 or 406 that the wireless channel being received cannot be received normally, or if the scramble method does not match the scramble method of the desired wireless channel even when the wireless channel is received normally, the same operation is performed again for a different satellite. Would try a different procedure.

[0016]

According to the present invention, the scrambling method adopted by each radio channel emitted by the satellite and the scrambling method information including information indicating the descrambling state are stored in the memory.
By comparing with the information indicating the descrambling state of the received wireless channel, it is determined whether or not the receiving wireless channel is the desired wireless channel, thereby confirming the satellite that emits the desired wireless channel. There is an effect that the direction of the antenna with respect to the satellite can be automatically set.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a satellite receiver according to the present invention.

FIG. 2 is a flowchart showing a procedure for delivering a relationship between a radio channel and a scrambling method to a memory in the satellite receiver shown in FIG.

FIG. 3 is a flowchart showing a procedure for setting an antenna orientation in the satellite receiver shown in FIG. 1;

FIG. 4 is a diagram illustrating an example of an antenna drive locus of the satellite receiver illustrated in FIG. 1;

FIG. 5 shows an example of correspondence between a radio channel transmitted from a satellite and a scrambling method adopted by the radio channel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Satellite receiver 2 Tuner 3 Memory 4 CPU 5 Scramble decoder part 6 Scramble method information input part 7 Display part 8 Antenna 9 Converter 10 Actuator (antenna drive unit part) 11 Cable 12 Antenna / polarization plane control cable 13 Polarizer (Polarizer) Wavefront control unit)

Claims (2)

(57) [Claims] 1. A satellite receiving apparatus for receiving a radio channel transmitted by a geostationary satellite, wherein a scramble method adopted by at least one radio channel allocated to the geostationary satellite and a descrambling state in each of the scramble methods are shown. Storage means for storing scramble method information including information; scramble decoder means for descrambling a received radio channel; radio channels to be received and instructions for driving an antenna; and a reception radio channel obtained from the scramble decoder means. The information indicating the descrambling state of the received radio channel is identified by comparing the scrambling method information obtained from the storage means,
A satellite receiving apparatus comprising control means for automatically setting an antenna direction for at least one or more geostationary satellites of interest. 2. The satellite receiving apparatus according to claim 1, further comprising a scramble method information input means for storing said scramble method information in said storage means.