JPS594905B2 - Phase adjustment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for adjusting a data signal delay phase amount of a wired line between base stations to a constant value using a wireless line.

This signal is sent from each slave station when a master station sends the same information to multiple slave stations via wire, and each slave station then transmits this signal to a mobile station (e.g. a car) on the same radio frequency. Data signals must be aligned in the same phase.

The conventional method for this purpose is to transmit specific pattern information from the master station at a single radio frequency with high power, and at the same time send the same specific pattern information to all wired lines to all slave stations. The slave station uses a method of measuring the delay phase amount of a specific pattern received wirelessly and a specific pattern received by wire, and adjusting the phase amount of the data signal so that it becomes a certain standard value. It was getting worse. However, with the conventional method, not only can slave stations be installed only in areas where radio waves can reach from the master station, but also the delay phase of each slave station can be delayed by simply keeping the amount of delay phase constant in the wired section from the master station to the slave station. There was a drawback that the phase adjustment accuracy deteriorated due to variations in the phase amount.

To prevent this, it was necessary to use expensive circuit elements for the transmitters of each slave station and adjust the delay phase amount of each transmitter to be constant. An object of the present invention is to provide a delay phase amount adjustment method that eliminates the above-mentioned drawbacks.
The present invention first calculates the amount of delay phase of a first slave station adjacent to a master station based on a specific pattern signal transmitted from the master station over a wireless line, and calculates the amount of delay phase of a first slave station adjacent to the master station by wire from the master station to the first slave station. It is characterized by adjusting not only the delay phase amount of the section but also the delay phase amount of the transmitter of the first slave station.

The present invention then calculates the delay phase amount of a second slave station adjacent to the first slave station from the master station based on a specific pattern signal transmitted from the first slave station over a wireless line. The delay phase amount of the transmitter of the second slave station as well as the delay phase amount of the wired section to the second slave station is adjusted, and then the second slave station
The amount of delay phase of a third slave station adjacent to the second slave station is determined based on the specific pattern signal transmitted from the slave station over a wireless line, and the amount of delay phase is determined by the wired transmission from the master station to the third slave station. Adjusting the delay phase amount of the adjacent slave station based on the slave station that is already in phase, such as adjusting not only the interval but also the delay phase amount of the transmitter of the third slave station. It is characterized by

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an embodiment of the invention. 1 is a master station, 2 is a first slave station adjacent to the master station 1, and 3 is a second slave station adjacent to the first slave station.

First, a method for adjusting the amount of delay phase between the master station 1 and the first slave station 2 will be described. Specific pattern I transmitted from transmitter 4 in master station 1. via the wireless line 21
The signal is received by the phase adjustment receiver 6 in the slave station 2 and inputted as is to the delay phase amount measuring section 5 in the master station 1 via the wired line 22. This route is indicated by 9. The amount of delay phase at this time is stored in the delay phase measuring section 5 as a reference value. Next is the same specific pattern 1. is the transmission means of master station 1 (not shown)
The signal is sent to the wired line 23, passed through the transmitter 4 in the first slave station 2 and the wireless line 24, is received by the phase adjustment receiver 6 in the first slave station 2, and is transmitted directly via the wired line 22. , is input to the delay phase amount measuring section 5 in the master station 1. This route is indicated by 10. Routes 9 and 10 use the same wired line from the first slave station 2 to the master station 1, so the difference in delay phase amount between the two routes is due to the radio waves emitted from the transmitter 4 of the master station 1. Delay phase amount and transmitter 4 of first slave station 2
It is equal to the difference in the amount of delay phase of the radio waves emitted from the First slave station 2
In order to match the phase of the transmitter output with that of the master station 1, the difference in the amount of delay phase is set in the delay circuit 7. Note that during the measurement of the difference in delay phase amount, the delay circuit 7 is set to O or the delay circuit 7 is bypassed. In this way, the phase of the radio waves transmitted by the first slave station 2 is adjusted to be the same as that of the master station 1. Next, the phase adjustment of the second slave station 3 will be explained.

The reference station for the amount of delay phase is the first slave station 2. A specific pattern I transmitted from a transmitting means (not shown) of the master station 1. is transmitted from the transmitter 4 in the first slave station 2 via the wired line 23 including the delay circuit 7. A specific pattern received by the phase adjustment receiver 6 in the second slave station 3 via the wireless line 25. is input as is to the delay phase amount measuring section 5 in the master station 1 via the wired line 26. This route is indicated by 11. The amount of delay phase at this time is stored in the delay phase measuring section 5 as a reference value. Next, the same specific pattern o is the master station 1
It is sent to the wired line 27 from a transmitting means (not shown), passes through the transmitter 4 in the second slave station 3 and the wireless line 28, and is received by the phase adjustment receiver 6 in the second slave station 3. The signal is input as is to the delay phase amount measuring unit 5 in the master station 1 via the wired line 26. This route is indicated by 12. Route 11
A delay phase difference between the route 12 and the route 12 is set in the delay circuit 8, and the phase of the radio waves transmitted by the second slave station 3 is adjusted to be the same as that of the first slave station 2. This is the same as the phase of the master station. In addition,
During the delay phase difference measurement, the delay circuit 8 is set to O or the delay circuit 8 is bypassed. In this way, it is possible to adjust the amount of delay phase of the slave station adjacent to the slave station whose phase has already been adjusted as a reference. Even if radio waves do not reach the slave station directly from the master station, phase adjustment can be performed as long as the radio waves arrive from a slave station adjacent to the master station. Next, a phase adjustment method according to an embodiment of the present invention when interoffice wire lines are multiplexed will be explained with reference to FIG.

1 is a master station, and 2 is a slave station.

The wired line between the master station and the slave stations has multiplexing units 1 for uplink and downlink respectively.
4. There is a separating section 13. The multiplexing section multiplexes data necessary for the system, such as the outgoing control channel and the incoming control channel, in synchronization with the clock generated by the clock generating section 17. An example of this timing chart is shown in FIG. The data Chl, ch2, Ch3 of the data lines CHl, CH2, CH3 are clocked bit by bit.
The signals are sampled and multiplexed to form a multiplexed line M. Conversely, the demultiplexing section 13 demultiplexes the multiplexed data of the multiplexed line M into channel data Ch1, Ch2, and Ch3.
An example of this timing chart is shown in FIG. As shown in FIG. 4, the data passing through the separation section 13 becomes data synchronized with each clock 18, and a delay is added to the data. Now, in order to adjust the phase, the transmitter 4 in the master station 1 has a fixed pattern IO.
is sent out, received by the phase adjustment receiver 6 in the slave station 2 via the wireless line 21, and inputted to the delay phase amount measurement unit 5 in the master station 1 via the wired line 22, the multiplexer 14. After passing through the separating section 13, a specific pattern I is formed. The data of slave station 2
Since the clock 18 is sampled with a different (asynchronous) clock 18 each time, the amount of delay phase is not transmitted correctly. For this reason, in this embodiment, when adjusting the phase, the switches 15 and 16 are turned upward to bypass the multiplexing section 14 and the separating section 13. A specific pattern with such a route. is input to the delay phase measurement section 5, and the amount of delay phase at this time is stored in the delay phase measurement section 5 as a reference value. Then the same specific pattern. is sent from the transmitting means (not shown) of the master station 1 to the wired line 23 via the multiplexing unit 14, and then to the demultiplexing unit 13, and then to the transmitter 4 in the slave station 2 and the wireless line 24, and then to the slave station 2. is received by the phase adjustment receiver 6 of the
2, bypasses the separation section 13, and is input to the delay phase measurement section 5. Then, as in the case of FIG. 1, the delay phase difference between this route and the route via the wireless line 21 is set in the delay circuit 7, so that the phase of the radio waves transmitted by the slave station 2 is adjusted to be the same as that of the master station 1. Ru. Note that during the delay phase difference measurement, the delay circuit 7 is set to O or the delay circuit 7 is bypassed. In this way, even in a system using multiple lines, the phase can be adjusted using the adjacent station as a reference. In this way, according to the present invention, the restrictions regarding the arrangement between the master station and the slave stations are eliminated because the radio waves must reach all the slave stations from the master station in the United States. This means that even if a multiplexing method is used on the wired line, the phase can be adjusted sufficiently, and since the route is formed via the transmitter used in the system during phase adjustment, there is no variation in the amount of delay phase of the transmitter. This has the advantage that the phase adjustment is also improved, and the phase adjustment accuracy is also improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a phase adjustment method according to an embodiment of the present invention, FIG. 2 is a block diagram of a phase adjustment method according to an embodiment of the present invention when multiplexed lines are used, and FIG. FIG. 4 is a timing chart of the multiplexing section 14 of FIG. 2, and FIG. 4 is a timing chart of the separating section 13 of FIG. 1... Master station, 2... First slave station, 3.
...Second slave station, 4...Transmitter, 5...
... Delay phase amount measuring section, 6 ... Phase adjustment receiver, 7, 8 ... Delay circuit, 9, 10, 11
, 12... Delay phase amount measurement route, 13...
... Separation section, 14 ... Multiplexing section, 15, 16
・・・・・・Selector switch, 17・・・Clock generator, 18・・・Clock, o・・・Specific pattern, CHl, CH2, CH3... Data line, Chl, Ch2, Ch3... Channel data, M... Multiplexed line.

Claims (1)

[Claims] 1. A main station comprising: a master station; and a first means for transmitting a signal transmitted from the master station to the own station via a first wired line to a first wireless line. In the phase adjustment method in a system having a slave station, the master station has a second means for transmitting a specific pattern signal to a second wireless line, and a third means for transmitting the specific pattern signal to the first wired line. and fourth means for measuring the amount of delay phase of the specific pattern signal transmitted from the slave station to the master station via the second wired line, and , a fifth means is provided for sending the specific pattern signal transmitted via the first or second wireless line to the second wired line, and the specific pattern signal is transmitted from the master station to the above. The master station based on the specific pattern signal that, when transmitted to the slave station via the second wireless line, returns to the master station via the fifth means and the second wired line sequentially. When the amount of delay phase measured in and the specific pattern signal are transmitted from the master station to the slave station via the first wired line, the first means, the first wireless line, and the fifth means and a difference between the delay phase amount measured at the master station based on the specific pattern signal that has returned to the master station via the second wired line sequentially, is set in the first wired line. A phase adjustment method characterized by: 2 It has a master station and a plurality of slave stations, and each slave station sends a signal transmitted from the master station to each slave station via a first wired line to a first wireless line. In the phase adjustment method in a system comprising a first means for transmitting a specific pattern signal to the master station, a second
means for selectively transmitting the specific pattern signal to one of the first wired lines, and transmission via a second wired line from each of the slave stations to the master station. The fourth step is to measure the amount of delay phase of the specific pattern signal that has been
and a fifth means for transmitting the specific pattern signal transmitted via the first or second wireless line to each slave station to the second wired line. and when the specific pattern signal is transmitted from the master station to the first slave station adjacent thereto via the second wireless line, the fifth means of the first slave station and the second wired Based on the specific pattern signal that has returned to the master station via the line sequentially, the amount of delay phase measured by the master station and the specific pattern signal are sent from the master station to the first slave station. When transmitting via a wired line, the first means of the first slave station, the first wireless line, the first
The difference between the delay phase amount measured at the master station based on the specific pattern signal that returned to the master station via the fifth means of the slave station and the second wired line in sequence. 1st
The specific pattern signal is then transmitted from the master station to the first slave station via the first wired line, and further transmitted to the first slave station. When a station transmits data to a second slave station adjacent thereto via the first wireless line, the fifth means of the second slave station and the second wired line are sequentially transmitted to the master station. When the delay phase amount and the specific pattern signal measured by the master station based on the specific pattern signal returned from the master station are transmitted from the master station to the second slave station via the first wired line. Return to the master station via the first means of the second slave station, the first wireless line, the fifth means of the second slave station, and the second wired line in sequence. The phase of the child whose phase has already been adjusted is set in the first wired line going to the second slave station by setting the difference between the delay phase amount measured at the master station based on the specific pattern signal that has arrived. A phase adjustment method that uses a station as a reference and adjusts the phase of adjacent slave stations. 3. When a line in which multiple channels are multiplexed is used in the first and second wired lines between the master station and the slave station, the specific pattern signal is transmitted from the slave station to the master station. The phase adjustment according to claim 1 or 2, characterized in that a multiplexing section and a demultiplexing section for a multiplexed wired line from the slave station to the master station are bypassed when transmitting via a wired line. method.