JP2003188813A - Wireless fixed station apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless fixed station apparatus capable of ensuring excellent communication without disturbance of a reception channel by transmission waves of a plurality of channels existing at the same time. <P>SOLUTION: Each channel unit 29 of a fixed station 45 is provided with: a plurality of channel IF reception sections 30, 30a for detecting a carrier level of an uplink; a changeover control section 35 for selecting an output of the channel IF reception section excellently received depending on a detection level; and a system control section 43 that allows an antenna receiving a transmission IF signal from the channel IF reception section making excellent reception by the selection of the changeover control section to make transmission. When a plurality of wireless transmitters approach the fixed station, the fixed station apparatus controls the transmission power of a mobile station receiving a signal so as to make excellent communication without disturbance of the communication channel by transmission waves of a plurality of channels other than the communication channel. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless fixed station device used for wireless communication for business purposes, wireless communication for business purposes, paging radio communication for business purposes, broadcast radio communication for business purposes, etc. Is.

[0002]

2. Description of the Related Art Conventionally, as a wireless fixed station apparatus of this type, there has been one as shown as a first example in FIGS. First, referring to FIG. 6, this wireless fixed station device includes a receiver 64 equipped with tuners 58, 58a, 58b, 58c for diversity reception of a plurality of channels in which two systems of antenna boosters 56, 56a are separately installed.
Is configured. The antenna boosters 56 and 56a, which include the antennas 2 and 2a, respectively, and the antenna reception RF unit 57 having the RF filters 4 and 4a and the RF amplifier 5, and the antenna power supply unit 21, can be installed separately from the receiver 64. . DC voltage for driving the antenna boosters 56, 56a is supplied to the coaxial cables 22b, 22c for sending a reception signal to the receiver 64 from the phantom power supply section 41a in FIG.

Next, in FIG. 7, the receiver 64 includes a reception 1st mixer 6 and a 1st IF capable of receiving a plurality of channels.
The system is provided with two systems of distribution units 23d and 23e configured by the filter 7, the reception 1st IF amplifier 8, and the distributor 28, and the reception signal is a 1st IF filter 7 for each reception channel.
b, 2nd mixer 31, 2ndIF circuit 60, demodulator 6
2 system tuner circuit 59, 59
a and a second local synthesizer 36 that sets the channel frequency of the tuner, detects the RSSI (reception field strength level) of each system, and the switching control unit 35 uses the SW
34, the demodulated signal of the receiving system having a large receiving level is
By comparing and selecting the RSSI signal to be sent to the F section 62,
Diversity receiving tuners 58, 58a, 58b,
58c, two-system antenna booster 56,
Phantom power supply section 41a for supplying power supply voltage to 56a
And a 1st local synthesizer 14 that supplies a local signal to the 1st mixer 6 provided in the two systems of distribution units 24b and 24c, and a 1st local control unit 63 that controls the 1st local synthesizer 14.

Conventionally, as a second example of this kind of wireless fixed station apparatus, there have been those shown in FIGS. 8 and 9. First, referring to FIG. 8, this wireless fixed station device includes a receiver 64 equipped with tuners 58, 58a, 58b, 58c for receiving a plurality of channels separated from two systems of antenna converters 65, 65a for diversity reception.
a. Antenna converter 65, 65
a is antennas 2 and 2a and antenna reception RF, respectively.
Part 57, 1st mixer 6, 1st IF filter 7
1stIF amplifier 8 and 1stIF filter 7a
The first local synthesizer 14, the first local control unit 63, the local filter 18, and the antenna power supply unit 21 are included and can be installed separately from the receiver 64a. The coaxial cables 22d and 23e for transmitting the reception IF signal to the receiver 64a are provided with the DC voltage for driving the antenna converters 65 and 65a, the reference clock signal of the 1st local control section 63, and the 1st local control signal, respectively. Power is supplied from the power supply unit 41b, the antenna converter control unit 66, and the antenna local reference clock unit 44.

Next, referring to FIG. 9, the receiver 64a includes distributors 23f and 23g for receiving a plurality of channels, and the distributors 23f and 23g are the 1stIF filters 7 and 1stI.
It is composed of an F amplifier 8a and a distributor 28. Further, the installed tuner is the tuner 5 shown in the first example of FIG.
It has the same function and configuration as 8, 58a, 58b, 58c. Therefore, detailed description of the configuration of the receiver 64a is omitted. The industrial fields of use in the first and second conventional examples shown in FIGS. 6 to 9 described above are as follows:
All were wireless FM fixed station devices using an analog method.

[0006]

However, in the above-mentioned conventional wireless fixed station device, when a plurality of wireless mobile stations are simultaneously used in the same area, reception is caused by intermodulation distortion due to transmission waves of a plurality of channels other than the reception channel. There is a problem in that the channels are disturbed and the effective number of channels cannot be secured.

The present invention has been made to solve the above-mentioned conventional problems, and in particular, by controlling the transmission power of a wireless mobile station, a reception channel is disturbed by transmission waves of a plurality of channels that are present at the same time. Provided is a wireless fixed station device capable of ensuring good communication without any trouble.

[0008]

A wireless fixed station device according to the present invention is provided with a plurality of installed antennas each having an antenna for transmission and reception, and is installed separately from the installed antennas, and outputs and outputs signals to and from the installed antennas. A plurality of distributing units for distributing, and a fixed station having a plurality of channel units to which the transmission / reception IF signals are distributed from the distributing unit,
The channel unit is configured to include a transmission synthesizer that generates a transmission IF frequency for generating a transmission carrier frequency for each channel. With this configuration,
In the TDD transmission method in which the uplink and the downlink, which have a plurality of channels in the same area, have the same frequency, the transmission / reception channel frequency can be managed independently for each channel unit.

A wireless fixed station device according to the present invention is
A plurality of channel IF reception units in which the channel unit detects an uplink carrier level, a switching control unit that selects the output of the channel IF reception unit that has been favorably received according to the detection level, and a better selection by the switching control unit. And a system control unit for transmitting a transmission IF signal from the received channel IF reception unit side. With this configuration, it is possible to estimate the radio wave propagation path by receiving diversity on the uplink and control the transmission power of the wireless mobile station by transmitting the downlink from the receiving antenna side under the same conditions as the reception state. Thus, when a plurality of wireless transmitters approach a fixed station at the same time, good communication can be performed without the communication channels being disturbed by transmission waves of a plurality of channels other than the communication channel.

A wireless fixed station device according to the present invention is
The fixed station has a configuration in which a control signal of the installed antenna is superimposed on a phantom power supply voltage and sent to the installed antenna to control the installed antenna from the fixed station side. With this configuration, the synchronous control between the RFSW control unit of the installed antenna and the system control unit of the fixed station becomes unnecessary, and the circuit configuration of the fixed station device can be simplified. Also, the function test of the installed antenna can be set and controlled by the fixed station side, which facilitates maintenance service.

A wireless fixed station device according to the present invention is
In the installed antenna, a transmission IF mixer that frequency-converts the transmission IF frequency transmitted from the fixed station, a transmission RF mixer that converts the transmission IF frequency to a carrier frequency, and an 1st local signal for uplink reception to the transmission RF. A configuration is provided that includes a 1st local synthesizer that is shared with a local signal of the mixer, and a frequency divider that divides the local signal from the 1st local synthesizer by 1 / n and outputs as a local signal of the transmission IF mixer. ing. With this configuration, it is possible to easily construct an IF frequency configuration in which the transmission / reception IF frequency does not interfere with the transmission / reception IF circuit.

A wireless fixed station device according to the present invention is
The installed antenna receives a transmission power output signal R
It has a configuration including an ATT and an RF switch, which are bypassed by the F circuit, attenuate transmission power, and serve as a pseudo signal source for correcting a transmission / reception IF level loss due to the cable length of the coaxial cable. With this configuration, the transmission power can be known at the required reception level of the antenna reception circuit, and the isolation by the ATT and the bypass RF switch can be sufficiently secured, and the reception range of the uplink can be obtained without the influence of the downlink. Can be secured.

A wireless fixed station device according to the present invention is
In the installed antenna, an RSSI detector that detects a transmission power level by using an uplink reception circuit for detecting a downlink transmission power level;
An antenna transmission AGC circuit that corrects the loss of the transmission IF level of the transmission power due to the cable length of the coaxial cable calculated from the RSSI level from the SSI detection unit, and a transmission IF level loss correction value that controls the antenna transmission AGC circuit The antenna reception AGC circuit is provided for correcting the loss of the reception IF level by using the antenna reception AGC circuit. With this configuration, the downlink transmission power level can be known, and the transmission IF level and the reception I level corresponding to the variation amount of the transmission power level due to the coaxial cable length can be obtained by the antenna control unit.
The F level can be corrected.

A wireless fixed station device according to the present invention is
In the installed antenna, the amount of change in downlink transmission power is calculated from the RSSI level by the RSSI detection unit and converted into a transmission / reception IF level, and antenna transmission AGC
The antenna control unit controls the circuit and the antenna reception AGC circuit to correct the deterioration of downlink transmission power and the deterioration of uplink reception circuit gain due to the cable length of the coaxial cable. With this configuration, correction control of the required transmission power level of the downlink and correction control of the required reception circuit gain of the uplink can be automatically performed.

A wireless fixed station device according to the present invention is
The installed antenna is configured to include a frequency divider that switches to a frequency division ratio that does not generate an interfering wave and controls a transmission frequency that is frequency-converted by a local frequency to be outside a transmission band during uplink reception control. With this configuration, at the time of uplink reception, the influence of sneaking into the receiving circuit in the transmission carrier frequency band is reduced, and the limitation due to the inability to achieve sufficient isolation due to the structure of the RFSW that switches between the uplink and the downlink is supplemented. The reception dynamic range of the receiving circuit can be secured.

The wireless fixed station device according to the present invention is
An optical cable is provided for transmitting and receiving the transmission / reception IF signal and the installation antenna control signal between the fixed station and the installation antenna. With this configuration, when installing a fixed station device in a large area such as a stadium or a large event venue, the level loss due to the cable length is unavoidable in the connection between the installation antenna and the fixed station with a coaxial cable. Level loss correction function is required. However, the transmission / reception IF signal level loss does not occur in the connection between the installed antenna and the fixed station by the optical cable, and it is possible to provide the wireless fixed station apparatus that does not require the level correction function.

In short, the present invention provides a digital type wireless fixed station device in a wireless communication facility for wirelessly transmitting and receiving at the same time with a wireless mobile station such as a microphone using a plurality of channels to perform recording and communication control. To do. That is, the wireless fixed station apparatus according to the present invention performs wireless communication by digital modulation of the TDD transmission system, and the wireless fixed station apparatus is provided with a downlink transmission function and the wireless transmitter of the wireless mobile station is provided with a reception function. The wireless fixed station device has a function of transmitting a downlink for control from an installed antenna of the wireless fixed station device in order to control the transmission power of the wireless mobile station to a required level according to the reception level. In the TDD transmission method, since the uplink and the downlink are carriers of the same frequency, when there is a temporal correlation between the transmission timing and the reception timing, the uplink is transmitted under the same condition as the radio wave propagation condition known by receiving the downlink. It is known that can be sent. Therefore, when diversity reception is performed by the wireless fixed station device, a large number of effective communication channels can be simultaneously secured in the same area by transmission diversity in which downlink is transmitted from the antenna having a higher reception level.

Also, the wireless fixed station apparatus according to the present invention has a transmission PLL synthesizer for generating a downlink carrier frequency for each of a plurality of channel units,
Even when a plurality of wireless mobile stations are used at the same time, it is possible to provide a wireless fixed station device capable of individually controlling the transmission power of the wireless mobile stations for each communication channel. Further, the wireless fixed station device according to the present invention can optimally control the transmission power of the wireless transmitter by estimating the radio wave propagation path of the communication channel and transmitting the downlink from the antenna side that has received a good uplink. A wireless fixed station device can be provided.

In addition, the wireless fixed station device according to the present invention is installed by the installed antenna having a function of correcting the deterioration of the transmission power and the deterioration of the reception circuit gain due to the length of the coaxial cable connecting the installed antenna and the fixed station. It is possible to provide a wireless fixed station device that facilitates the conditions. Further, the wireless fixed station device according to the present invention is a wireless fixed station device which does not deteriorate the transmission / reception signal due to the cable length connecting the installed antenna and the fixed station even when used in a wide area such as a stadium or a large event venue. Can be provided.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First to ninth embodiments of the present invention will be described in detail below with reference to the accompanying drawings. (First Embodiment) First, a wireless fixed station apparatus according to a first embodiment of the present invention will be described with reference to FIGS. The wireless fixed station device according to the present embodiment has a fixed station 45 that can be installed separately from the installed antennas 1 and 1a having the transmitting and receiving antennas 2 and 2a.
On the other hand, distribution units 23 and 23a for distributing input / output signals to / from the installed antennas 1 and 1a, and n channel units 29 and 29 for each channel having a transmission / reception diversity function.
a, 29b, 29c, TDD control of IFSWs 26b, 26c of the channel unit 29, and IFSW 26
A system control unit 43 for synchronously controlling the transmission diversity control of d, the TDD control of the IFSWs 26 and 26a of the bidirectional circuit 24 of the distribution unit 23, and the installed antenna control unit 42 that superimposes the TDD control signal on the phantom power supply voltage is provided. It was formed.

In the installed antennas 1 and 1a shown in FIG. 1, RFSW for switching between downlink and uplink
(Switch) 20 and uplink receive carrier are RF
The band is limited by the filters 4 and 4a, amplified by the RF amplifier 5, converted into an IF frequency by the 1st mixer 6, and then 1s.
Phantom power supply voltage, antenna local reference clock signal, R by tIF filter 7 and 1st IF amplifier 8
FSW control signal and transmission IF signal are excluded, and 1stI
The 1stIF signal is sent to the fixed station 45 via the F filter 7a.
The antenna receiving unit 3 is formed as a receiving system for sending to. Further, the downlink transmission system formed as the antenna transmission unit 9 includes a fixed station 4 in the transmission IF filter 10.
The phantom power supply voltage, the antenna local reference clock signal, the RFSW control signal, and the uplink reception IF signal input from 5 are excluded, the transmission IF signal is band-limited and extracted, the transmission IF mixer 11 performs frequency conversion, and 1stI
The band is limited by the F filter 7b, and further the transmission RF mixer 12
The frequency is converted into a transmission carrier signal by the RF filter 4b.
The band is limited by, the transmission carrier frequency is extracted, amplified by the PA circuit (power amplification circuit) 13, and the TDD of the RFSW 20 is extracted.
A configuration in which downlink is transmitted from the antennas 1 and 1a by control is formed.

Further, the antenna power supply unit 21 which stabilizes the phantom power supply voltage and supplies a constant voltage to the installed antenna circuit.
And the RFSW control signal and the antenna local reference clock signal superimposed on the phantom power supply voltage are extracted by the local filter 18 to generate the local signal of the transmission / reception circuit. The antenna local unit 17 includes a 1st local synthesizer 14 and an antenna control unit 19. And a frequency divider 15 for dividing the output frequency of the 1st local synthesizer 14 by 1 / n to generate a local signal of the transmission IF mixer 11.

In the fixed station 45 shown in FIG.
3, 23a perform transmission and reception with the phantom power supply unit 41 that drives the installed antennas 1 and 1a by TDD control, and a transmission / reception IF filter 25 that passes the reception 1stIF signal and the transmission IF signal, and IFSWs 26 and 26a.
The bidirectional circuit 24 is formed by the stIF amplifier 8a and the transmission IF amplifier 27, and the distributor 28 that mixes and distributes the transmission / reception IF signal to the channel units 29, 29a, 29b, 29c.

Further, the channel unit 29 shown in FIG.
29a, 29b, 29c are provided with IFSWs 26b, 26c for switching a reception 1stIF signal and a transmission IF signal for a plurality of reception channel IF signals for every n channel units, and the channel IF reception units 30 and 30a are reception channel 1stIF signals. Is extracted by the 1st IF filter 7d, and 2
2nd IF frequency is converted by the nd mixer 31 and 2
A channel IFAGC circuit that limits the band by the ndIF filter 32 and keeps the reception level constant (hereinafter, simply referred to as IFAGC
(Also called a circuit) 33. Further, the channel IFAGC circuit 33 has a function of detecting an RSSI signal corresponding to the reception level from the antennas 2 and 2a, and an RSSI indicating the magnitude of the reception level from the antennas 2 and 2a.
The switching control unit 35 compares the A signal and the RSSIB signal. Further, the channel IF receivers 30 and 30a output the output signals of the larger channel IF receivers 30 and 30a by S.
A decoding unit 39 is provided, which receives a diversity signal by W34, demodulates it by a demodulation unit 37, clock-reproduces an A / D-converted signal, passes through a channel control unit 38 that performs error correction processing and frame conversion, and then decodes it. To be done.

Further, the channel IF receivers 30 and 30a
Includes a 2nd local synthesizer 36 for generating a 2nd IF signal and setting a receiving channel frequency, and a transmitting synthesizer 40 for generating an IF signal for converting a downlink transmitting channel frequency, and further, a fixed station 45.
Is the transmit / receive TDD control and the antenna 2 which has received well
Alternatively, IFSWs 26a, 26b capable of transmitting a transmission IF signal from the channel IF receiver 30 or 30a on the 2a side,
26c, an antenna local reference clock unit 44 that generates a reference clock signal for the antenna local unit 17 of the installed antennas 1 and 1a superimposed on the phantom power supply voltage, and an R of the installed antennas 1 and 1a.
Installed antenna control unit 42 for remotely controlling the FSW 20
And is configured.

As described above, the wireless fixed station device according to the first embodiment of the present invention transmits the transmission IF signal for converting the downlink transmission carrier frequency to the channel units 29, 29a, 29b, 29c of the fixed station 45. By including the transmitting synthesizer 40 for generating, in the TDD transmission system in which a plurality of channels exist in the same area and the uplink and the downlink have the same frequency, the transmission / reception channel frequency can be managed independently for each channel unit.

(Second Embodiment) Next, a wireless fixed station device according to a second embodiment of the present invention will be described with reference to FIGS. 1 and 2. The wireless fixed station device according to the present embodiment differs from the wireless fixed station device according to the first embodiment in that the switching controller controls the respective RSSI signals received by the channel IF receiver 30 or 30a of the channel unit 29 provided in the fixed station 45. 35, and based on the comparison / judgment signal, the system controller 43 successfully receives the transmission I from the channel IF receiver 30 side or 30a side.
The difference is that the transmission diversity control for transmitting the F signal is performed. According to this configuration, a good radio wave propagation path is estimated by performing diversity reception on the uplink, and the downlink is transmitted from the receiving antenna side under the same conditions as the reception state, and the transmission power of the wireless mobile station is By controlling, by transmitting waves of multiple channels other than the receiving channel from multiple wireless mobile stations at the same time,
Good communication can be ensured without disturbing the reception channel.

(Third Embodiment) Next, a wireless fixed station apparatus according to a third embodiment of the present invention will be described with reference to FIGS. 1 and 2. The wireless fixed station device according to the present embodiment is different from the wireless fixed station device according to the above-described embodiment in that the TDD control signal is superimposed on the phantom power supply voltage supplied to the installation antennas 1 and 1a installed separately from the fixed station 45. The difference is that an installation antenna control unit 42 that controls the phantom power supply unit 41 is provided, and the system control unit 43 controls the installation antennas 1 and 1a. According to this configuration, the RFSW control unit 16 of the installed antenna 1
The synchronization control between the system controller 43 of the fixed station 45 and the fixed station 45 is unnecessary, and the circuit configuration of the device can be simplified. Further, the function test of the device can be performed on the fixed station 45 side, and the maintenance service becomes easy.

(Fourth Embodiment) Next, a wireless fixed station apparatus according to a fourth embodiment of the present invention will be described with reference to FIGS. 1 and 2. The wireless fixed station device according to the present embodiment is different from the wireless fixed station device according to the above-described embodiment in that the fixed station 4 is installed in the installed antennas 1 and 1a.
Transmission I for converting the transmission IF frequency input from 5
An F-mixer 11 and a transmission RF mixer 12 that further converts the frequency to a carrier frequency are provided,
The output of the st local synthesizer 14 is shared with the local signal of the transmission RF mixer 12, and further a frequency divider 15 for dividing the 1st local frequency by 1 / n is provided, and the output signal of the frequency divider 15 is transmitted to the local of the transmission IF mixer 11. The difference is that by using a signal, one local synthesizer can form a local circuit of a transmission / reception circuit. According to this configuration, the IF frequency including the fixed station 45 can be constructed without interfering with the IF circuit for mutual transmission and reception.

(Fifth Embodiment) Next, a wireless fixed station apparatus according to a fifth embodiment of the present invention will be described with reference to the main part of the wireless fixed station apparatus shown in FIG. The wireless fixed station device according to the present embodiment is different from the wireless fixed station device according to the above-described embodiment in that a PA is provided in order to detect downlink transmission power in the installed antenna 1b.
The output signal of the circuit (power amplifier circuit) 13 is bypassed to the receiving side, and transmission / reception I is performed by the cable length of the coaxial cable 22.
The difference is that an ATT 49 for attenuating the transmission power and the RFSW 20a are provided in order to serve as a pseudo signal source for correcting the F level loss. According to this configuration, the transmission power can be known from the required reception level of the antenna reception circuit, the isolation by the ATT 49 and the bypass RFSW 20a can be sufficiently secured, and the uplink reception can be performed without the downlink influence. The range can be secured.

(Sixth Embodiment) Next, a wireless fixed station apparatus according to a sixth embodiment of the present invention will be described with reference to FIG. The wireless fixed station device according to the present embodiment is different from the wireless fixed station device according to the above-described embodiment in that the installed antenna 1b detects the reception level by using an uplink reception circuit for detecting the downlink transmission power level. The difference is that the detection unit 46 is provided, and the antenna control unit 19a calculates the level loss due to the cable length of the coaxial cable from the RSSI signal in the presence or absence of the cable from the RSSI detection unit 46. Further, the antenna transmission AGC circuit 48 is provided, and the antenna control unit 19a controls the antenna transmission AGC circuit 48 to transmit the transmission I calculated from the RSSI signal of the transmission power.
The antenna reception AGC circuit 4 that corrects the F level loss and corrects the reception IF level loss using the transmission IF level loss correction value that controls the antenna transmission AGC circuit 48.
The difference is that 7 is provided. With this configuration, the downlink transmission power level can be known, and the antenna control unit 19a can correct the transmission IF level and the reception IF level corresponding to the variation amount of the transmission power level due to the coaxial cable length.

(Seventh Embodiment) Next, a wireless fixed station device according to a seventh embodiment of the present invention will be described with reference to FIG. The wireless fixed station device according to the present embodiment is different from the wireless fixed station device according to the above-described embodiment in that, in the installed antenna 1b, the downlink transmission power deteriorates due to the cable length of the coaxial cable 22 and the gain of the uplink receiving circuit deteriorates. To correct R
The transmission of the FSW 20a is controlled, and the RS of the RSSI detection unit 46
An antenna controller 19a having a function of correcting the transmission / reception IF level by calculating the amount of change in downlink transmission power from the SI level, converting it into a transmission / reception IF level, and controlling the antenna transmission AGC circuit 48 and the antenna reception AGC circuit 47. The difference lies in that. According to this configuration, correction control of the required transmission power level of the downlink and correction control of the required reception circuit gain of the uplink can be automatically performed.

(Eighth Embodiment) Next, a wireless fixed station apparatus according to an eighth embodiment of the present invention will be described with reference to FIG. The wireless fixed station device according to the present embodiment is different from the wireless fixed station device according to the above-described embodiment in that the installed antenna 1b causes the downlink carrier frequency and the transmission IF frequency to interfere within the uplink reception band during uplink reception control. The difference lies in that the frequency division ratio of the frequency divider 15 is switched to 1 / n frequency division so as not to generate the frequency difference, and a function is provided to make the transmission frequency converted by the local frequency out of the transmission band. According to this configuration, the effect of sneaking into the receiving circuit in the transmission carrier frequency band at the time of uplink reception is reduced, and sufficient isolation cannot be taken due to the structure of the RFSW 20 that switches between the uplink and the downlink. The dynamic range of the receiving circuit can be secured by compensating for the limitation due to.

(Ninth Embodiment) Next, a wireless fixed station apparatus according to a ninth embodiment of the present invention will be described with reference to FIGS. 4 and 5. The wireless fixed station device according to the present embodiment is different from the wireless fixed station device according to the first embodiment described above in that the installed antennas 1c and 1d and the fixed station 45a convert the transmission / reception IF signals into optical signals. Optical-electrical conversion unit 5 for transmitting control signals of the units 50 and 50a and the antenna local section as optical signals.
1, an electric-optical conversion unit 52, a serial-parallel converter 53 and a parallel-serial converter 54 as an interface with the optical conversion unit, and is different in that the installed antennas 1c, 1d and the fixed station 45a are connected by an optical cable. ing. According to this configuration, when the fixed station device is installed in a large area such as a stadium or a large event venue, the level loss due to the cable length cannot be avoided in the connection between the installed antenna and the fixed station by the coaxial cable. This level loss correction function is essential. However, the level loss of the transmitted / received IF signal does not occur in the connection between the installed antenna and the fixed station by the optical cable, and the level correction function is not required.

[0035]

The wireless fixed station apparatus according to the present invention is configured as described above, and in particular, the radio wave propagation path of the reception channel is estimated and the downlink from the receiving antenna side is obtained under the same condition as the reception state. By controlling the transmission power of the wireless mobile station by simultaneously transmitting the wireless communication signal, the wireless communication channel does not interfere with the communication channel due to the transmission waves of multiple channels other than the communication channel in which multiple wireless transmitters approach the fixed station. It can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an installed antenna of a wireless fixed station device according to any of first to fourth embodiments of the present invention,

FIG. 2 is a block diagram showing the configuration of a fixed station of the wireless fixed station apparatus according to the first to fourth embodiments of the present invention,

FIG. 3 is a block diagram showing a configuration of an installed antenna of a wireless fixed station device according to fifth to eighth embodiments of the present invention,

FIG. 4 is a block diagram showing a configuration of an installed antenna of a wireless fixed station device according to a ninth embodiment of the present invention,

FIG. 5 is a block diagram showing a configuration of a fixed station of a wireless fixed station device according to a ninth embodiment of the present invention,

FIG. 6 is a block diagram showing a configuration of an antenna booster of a conventional wireless fixed station device of a first example,

FIG. 7 is a block diagram showing a configuration of a receiver of a conventional wireless fixed station device of a first example;

FIG. 8 is a block diagram showing a configuration of an antenna converter of a conventional wireless fixed station device of a second example;

FIG. 9 is a block diagram showing a configuration of a receiver of a conventional wireless fixed station device of a second example.

[Explanation of symbols]

1, 1a, 1b, 1c, 1d Installed antenna 2, 2a Antenna 3 Antenna receiver 4, 4a, 4b RF filter 5 RF amplifier 6 1st mixer 7, 7a, 7b, 7c 1stIF filter 8, 8a 1stIF amplifier 9 Antenna transmitter 10 transmission IF filter 11 transmission IF mixer 12 transmission RF mixer 13 PA circuit (power amplification circuit) 14 1st local synthesizer 15 frequency divider 16 RFSW control unit 17 antenna local unit 18 antenna local filter 19, 19a antenna control unit 20, 20a RFSW (Switch) 21 Antenna power supply units 22, 22a, 22b, 22c, 22d, 22e Coaxial cables 23, 23a 23b, 23c, 23d, 23e, 23
f, 23g distribution unit 24 bidirectional circuit 25 transmission / reception IF filter 26, 26a, 26b, 26c, 26d IFSW (switch) 27 transmission IF amplifier 28 distributor 29, 29a, 29b, 29c channel unit 30, 30a channel IF reception unit 31 2nd mixer 32 2nd IF filter 33 Channel IF AGC circuit 34 SW (switch) 35 Switching control section 36 2nd local synthesizer 37 Demodulation section 38 Channel control section 39 Decoding section 40 Transmit synthesizer 41 Phantom power supply section 42 Installed antenna control section 43 System control section 44 Antenna Local reference clock unit 45, 45a Fixed station 46 RSSI detection unit 47 Antenna reception AGC circuit 48 Antenna transmission AGC circuit 49 ATT (attenuator) 50, 50a Bidirectional electro-optical conversion unit (E / O,
O / E) 51 (O / E) photoelectric conversion unit 52, 52a electric-optical conversion unit (E / O) 53 serial-parallel converter (S / P) 54, 54a parallel-serial converter (P / S) 55, 55a, 55b, 55c Optical cables 56, 56a Antenna booster 57 Antenna receiving RF section 58, 58a, 58b, 58c Tuner 59, 59a Tuner section receiving circuit 60 2ndIF circuit 61 Demodulator 62 AF section 63 1st local control section 64 , 64a Receiver 65, 65a Antenna converter 66 Antenna converter control unit

Claims (9)

[Claims] 1. A plurality of installed antennas each having an antenna for transmission and reception, a plurality of distributors installed separately from the installed antennas and distributing input / output signals to and from the installed antennas, and transmitting and receiving from the distributors. A fixed station including a plurality of channel units to which IF signals are distributed, the channel unit including a transmission synthesizer that generates a transmission IF frequency for generating a transmission carrier frequency for each channel. Station equipment. 2. The channel unit includes a plurality of channel IF receivers for detecting an uplink carrier level,
A switching control unit that selects the output of the channel IF receiving unit that is properly received according to the detection level, and a system control unit that sends the transmission IF signal from the channel IF receiving unit that has been properly received by the selection of the switching control unit. The wireless fixed station apparatus according to claim 1, further comprising: 3. The fixed station includes an installation antenna control unit for superposing a control signal of the installation antenna on a phantom power supply voltage and sending the superimposed signal to the installation antenna to control the installation antenna from the fixed station side. The wireless fixed station device according to claim 1 or 2. 4. A transmission IF for frequency-converting a transmission IF frequency transmitted from the fixed station in the installed antenna.
A mixer, a transmission RF mixer for converting a transmission IF frequency to a carrier frequency, a 1st local synthesizer for sharing an uplink reception 1st local signal with a local signal of the transmission RF mixer, and a local signal from the 1st local synthesizer. 4. The wireless fixed station device according to claim 1, further comprising a frequency divider that divides the frequency by 1 / n and outputs the frequency-divided signal as a local signal of the transmission IF mixer. 5. In the installed antenna, an ATT and an RF switch, which serve as a pseudo signal source for bypassing a transmission power output signal to a reception RF circuit and attenuating the transmission power to correct a transmission / reception IF level loss due to a cable length of a coaxial cable. The wireless fixed station apparatus according to any one of claims 1 to 4, further comprising: 6. In the installed antenna, an RSSI detecting section for detecting a transmission power level by using an uplink receiving circuit for detecting a downlink transmission power level, and an RSSI level calculated from the RSSI level from the RSSI detecting section. The loss of the reception IF level is corrected using the antenna transmission AGC circuit that corrects the loss of the transmission IF level of the transmission power due to the cable length of the coaxial cable, and the loss correction value of the transmission IF level that controls the antenna transmission AGC circuit. The wireless fixed station device according to claim 1, further comprising an antenna reception AGC circuit. 7. The RSSI in the installed antenna
The amount of change in downlink transmission power is calculated from the RSSI level by the detection unit, converted into a transmission / reception IF level, and the antenna transmission AGC circuit and the antenna reception AGC circuit are controlled to reduce downlink transmission power due to the cable length of the coaxial cable. 7. The wireless fixed station device according to claim 6, further comprising an antenna control unit that corrects deterioration of the uplink reception circuit gain. 8. The installed antenna is provided with a frequency divider that switches a frequency division ratio that does not generate an interfering wave during uplink reception control so that a transmission frequency frequency-converted by a local frequency is out of a transmission band. Claim 1
7. The wireless fixed station device according to any one of 1 to 7. 9. An optical cable is provided for passing a transmission / reception IF signal and an installation antenna control signal between the fixed station and the installation antenna.
9. The wireless fixed station device according to any one of 1 to 8.