JP2003283415A - Base station apparatus, control station apparatus, and radio equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide radio equipment capable of instantaneously causing a delay. <P>SOLUTION: E/O sections 109a to 109n of the base station apparatus 101 of this invention convert a received signal from an electric signal into an optical signal. Delay sections 110a to 110n cause a delay on each received signal. Delay sections 111a to 111n cause a delay on each transmission signal. O/E sections 112a to 112n convert the transmission signal from the optical signal into the electric signal. A compositing section 125 puts together a plurality of the received signals. E/O sections 133a to 133n convert the transmission signal from the electric signal into the optical signal. The base station apparatus 101 and the control station apparatus 102 are interconnected through optical fiber cables 135a to 135n and 136a to 136n. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a base station apparatus, a control station apparatus and a radio apparatus.

[0002]

2. Description of the Related Art Conventionally, as a radio apparatus, a diversity antenna system has been used in order to reduce communication quality deterioration caused by interference waves and multipath propagation. In a diversity antenna system, a reference signal is regenerated from a direct wave, and it is electrically delayed by a delay circuit by a delay time of the delayed wave to be used as a reference signal for the delayed wave.
A method of performing adaptive synthesis by the S algorithm has been proposed.

[0003]

However, the conventional radio apparatus has a problem that the electric signal cannot be easily delayed because the electric signal is delayed by the delay circuit.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a base station apparatus, a control station apparatus and a radio apparatus which can easily cause a delay for a required time. To do.

[0005]

The base station apparatus of the present invention comprises:
An electro-optical conversion unit that converts a plurality of received signals received by a plurality of antennas from an electric signal to an optical signal, a delay unit that causes a delay for each received signal converted into an optical signal by the electro-optical conversion unit, and a received signal And a transmission means for transmitting to the control station device.

Further, the base station apparatus of the present invention employs a configuration in which a plurality of received signals delayed by the delay means are multiplexed and then collectively transmitted by the transmission means.

According to these configurations, when the received signal is delayed, the received signal is converted from an electric signal to an optical signal and delayed, so that the delay can be easily and only required for a required time. You can

In the base station apparatus of the present invention, the delay means delays the delay time between the received signals to be 1 chip time or more when the delay time between the received signals is 1 chip time or less. take.

According to this structure, when the received signal is delayed, the delay between the received signals is set to 1 chip time or more by the delay means, so that the reception level can be surely raised even in the case of micro-multipath. As a result, communication quality can be improved, and there is no restriction on the place of use.

The base station apparatus of the present invention comprises a delay means for delaying each of a plurality of transmission signals which are optical signals transmitted from the control station apparatus, and a transmission signal delayed by the delay means from the optical signal. Photoelectric conversion means for converting into an electric signal,
And a transmission means for transmitting a transmission signal.

According to this configuration, when the transmission signal is transmitted, the delay means is provided in the base station apparatus, so that there is no error in the delay time during the transmission from the control station apparatus to the base station apparatus. The transmission signal can be transmitted with a reliable delay time.

The control station apparatus of the present invention comprises a delay means for causing a delay for each of a plurality of received signals which are optical signals transmitted from the base station apparatus, a photoelectric conversion means for converting an optical signal into an electric signal, and a plurality of photoelectric conversion means. And a synthesizing means for synthesizing the received signals of.

According to this structure, when the transmission signal is delayed, the transmission signal is converted from an electric signal to an optical signal and delayed, so that the delay can be easily and only caused for a required time. it can.

In the control station apparatus of the present invention, the delay means delays the delay time between the received signals to be 1 chip time or more when the delay time between the received signals is 1 chip time or less. take.

According to this structure, when the received signal is delayed, the delay between the received signals is set to 1 chip time or more by the delay means, so that the reception level can be reliably increased even in the case of micro-multipath. As a result, communication quality can be improved, and there is no restriction on the place of use.

The wireless device of the present invention comprises: an electro-optical converting means for converting a received signal received by a plurality of antennas into an optical signal; The configuration includes a delay unit that causes a delay, a photoelectric conversion unit that converts a received signal from an optical signal to an electric signal, and a combining unit that combines a plurality of received signals.

According to this configuration, when the received signal is delayed, the received signal is converted from an electrical signal to an optical signal and delayed, so that the delay can be easily and requiredly caused. it can.

In the radio equipment of the present invention, the delay means is provided in the base station apparatus, the combining means is provided in the control station apparatus, and the transmission means transmits the received signal from the base station apparatus to the control station apparatus. Take the composition.

According to this structure, when the received signal is delayed, the synthesizing means is provided in the control station apparatus, so that the base station apparatus can be installed inexpensively and the base station apparatus can be miniaturized.

In the radio equipment of the present invention, the delay means and the synthesizing means are provided in the control station apparatus, and the transmitting means transmits the received signal from the base station apparatus to the control station apparatus.

According to this structure, when the received signal is delayed, the base station apparatus can be inexpensively installed and the base station apparatus can be downsized because the control station apparatus is provided with the combining means and the delay means. .

The radio apparatus of the present invention employs a structure in which a plurality of received signals are multiplexed and then collectively transmitted by the transmitting means.

According to this configuration, when receiving the received signals, the received signals can be collectively transmitted from the base station apparatus to the control station apparatus, so that external influences such as temperature changes are exerted on all the received signals. Since the conditions are the same, no delay error occurs for each received signal.

The delay means in the radio apparatus of the present invention adopts a configuration in which, when the delay time between received signals is 1 chip time or less, the delay time between received signals is delayed to be 1 chip time or more. .

According to this structure, the delay between the received signals is set to 1 chip time or more by the delay means, so that even in the case of micro-multipath, the reception level can be reliably increased and the communication quality is improved. While being able to
It is not restricted by the place of use.

The radio apparatus of the present invention comprises an electro-optical conversion means for converting a plurality of transmission signals from an electric signal into an optical signal, a delay means for causing a delay for each transmission signal, and a photoelectric conversion for converting an optical signal into an electric signal. A configuration including a means and a transmission means for transmitting a transmission signal is adopted.

According to this structure, when the transmission signal is delayed, the transmission signal is converted from the electrical signal to the optical signal and delayed, so that the delay can be easily and only caused by the required time. it can.

The delay means in the radio apparatus of the present invention is provided in the base station apparatus, and the transmission means transmits the transmission signal from the control station apparatus to the base station apparatus.

According to this configuration, when the transmission signal is transmitted, the delay means is provided in the base station device, so that there is no error in the delay time during the transmission from the control station device to the base station device. The transmission signal can be transmitted with a reliable delay time.

The delay means in the radio apparatus of the present invention is provided in the control station apparatus, and the transmission means transmits the transmission signal from the control station apparatus to the base station apparatus.

With this configuration, when transmitting the transmission signal, the delay means is provided in the control station apparatus, so that the base station apparatus can be installed at low cost and the base station apparatus can be downsized.

The radio apparatus of the present invention has a configuration in which a plurality of transmission signals are multiplexed and then transmitted collectively by the transmission means.

According to this configuration, when transmitting the transmission signals, the transmission signals can be collectively transmitted from the base station apparatus to the control station apparatus, so that there is an external influence such as a temperature change on all the transmission signals. Since the conditions are the same, no delay error occurs for each transmission signal.

In the wireless device of the present invention, the delay means is formed by an optical fiber cable having a different length for each delay means.

According to this structure, since the delay can be made only by adjusting the length of the optical fiber cable,
The delay means can be formed with a simple structure, and an inexpensive and small wireless device can be realized.

The receiving method of the wireless device of the present invention is an electro-optical conversion step of converting a reception signal received by a plurality of antennas from an electric signal to an optical signal, and each reception signal converted into an optical signal by the electro-optical conversion step. A delay step of causing a delay, a transmission step of transmitting the received signal from the base station apparatus to the control station apparatus, a photoelectric conversion step of converting the received signal from an optical signal to an electric signal, and a combining step of combining a plurality of received signals. When,
It was equipped with.

Further, the method for transmitting a radio device according to the present invention comprises an electro-optical conversion step of converting a plurality of transmission signals from electrical signals into optical signals, and a transmission step of transmitting the transmission signals from the control station apparatus to the base station apparatus. A delay step of causing a delay for each transmission signal converted into an optical signal by the electro-optical conversion step, a photoelectric conversion step of converting the transmission signal from an optical signal to an electric signal, and a transmission step of transmitting the transmission signal. I decided to do it.

According to these methods, since the optical signal is delayed, it is possible to easily cause the delay for a required time.

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION The essence of the present invention is to convert received signals received by a plurality of antennas into optical signals, and then delay the received signals, which are optical signals, by delay means to combine them. On the other hand, after converting a plurality of transmission signals into optical signals, the transmission signals, which are optical signals, are delayed by the delay means and transmitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a diagram showing the configuration of radio apparatus 100 according to Embodiment 1 of the present invention.

Radio apparatus 100 is mainly composed of base station apparatus 101 and control station apparatus 102. Base station device 10
1 is the antenna elements 103a to 103n and the duplexer 104.
a-104n, amplification sections 105a-105n, frequency conversion sections 106a-106n, local transmission section 107, filter sections 108a-108n, E / O (electrical light conversion) section 109a-
109n, delay units 110a to 110n, delay unit 111a
To 111n, O / E (photoelectric conversion) units 112a to 112
n, the filter units 113a to 113n, the frequency conversion unit 11
4a to 114n, local transmitter 115 and amplifier 116a
˜116n. Here, the amplification unit 10
5a to 105n, frequency converters 106a to 106n, local transmitter 107, filter units 108a to 108n, E /
O units 109a to 109n and delay units 110a to 110n
Is for processing a received signal, and includes delay units 111a to 111a.
111n, O / E units 112a to 112n, filter unit 1
13a to 113n, frequency converters 114a to 114n,
The local transmitter 115 and the amplifiers 116a to 116n process transmission signals. Antenna element 103a-
The 103n and the duplexers 104a to 104n are used for processing both the transmission signal and the reception signal.

The control station device 102 includes the O / E section 117a ...
117n, filter units 118a to 118n, frequency conversion units 119a to 119n, local transmission unit 120, despreading unit 1
21a to 121n, demodulation units 122a to 122n, decoding units 123a to 123n, A / D (analog / digital) conversion units 124a to 124n, a synthesis unit 125, D / A (digital / analog) conversion units 126a to 126n, and an encoding unit. 1
27a to 127n, modulators 128a to 128n, spreaders 129a to 129n, frequency converters 130a to 130.
n, local transmission unit 131, filter units 132a to 132n
And E / O units 133a to 133n.
Here, the O / E units 117a to 117n and the filter unit 11
8a to 118n, frequency conversion units 119a to 119n, local transmission unit 120, despreading units 121a to 121n, demodulation units 122a to 122n, decoding units 123a to 123n, A.
The D / A converters 124a to 124n and the synthesizer 125 process received signals, and the D / A converters 126a to 126a to 126n.
126n, encoders 127a to 127n, modulator 128
a-128n, spreading sections 129a-129n, frequency conversion sections 130a-130n, local transmission section 131, filter sections 132a-132n and E / O sections 133a-133n perform processing of transmission signals.

First, the configuration of the base station apparatus 101 will be described. First, the configuration of each unit that processes a received signal will be described. The duplexers 104a to 104n include the antenna elements 1
The signals received by 03a to 103n are amplified by the amplifiers 105a to 105a.
Output to 105n. The amplification units 105a to 105n amplify the received signal. Frequency converters 106a to 106n
Multiplies the received signal by the local signal to convert the received signal into an intermediate frequency having a different frequency for each received signal. The local transmission unit 107 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency. Filter units 108a to 108
n attenuates the frequency region other than the desired signal region with respect to the received signal after frequency conversion. E / O section 109a-10
9n converts an electric signal into an optical signal. Delay unit 110a
.About.110n causes a delay in the received signal.

Next, the configuration of each unit that processes the transmission signal will be described. The delay units 111a to 111n cause a delay in the transmission signal. The O / E units 112a to 112n convert a transmission signal from an optical signal to an electric signal. Filter unit 113
a to 113n attenuate the frequency region other than the desired signal region with respect to the transmission signal after frequency conversion. The frequency conversion units 114a to 114n convert the frequency of the transmission signal into a radio frequency by multiplying the transmission signal by the local signal. The local transmitter 115 generates a local signal having a frequency that is the difference between the radio frequency and the intermediate frequency. Amplifiers 116a to 116n
Amplifies the transmitted signal. Shared device 104a-104n
Outputs the transmission signal to the antenna elements 103a to 103n, and the antenna elements 103a to 103n transmit the transmission signal.

Next, the configuration of the control station device 102 will be described. First, the configuration of each unit that processes a received signal will be described. The O / E units 117a to 117n convert an optical signal into an electric signal. The filter units 118a to 118n attenuate the frequency region other than the desired signal region with respect to the received signal converted into the electric signal. Frequency converters 119a to 119
n is a despreading unit 121a to 121n and a demodulation unit 122a to 122 that multiplies the received signal by the local signal.
Convert to a frequency that can be despread and demodulated at n. The local transmitter 120 generates a local signal having an intermediate frequency.
The despreaders 121a to 121n are code division multiple access (C
Coherent demodulation is performed by multiplying the received signal by the same PN signal having the same phase as the PN signal in the received signal which is a signal of the DMA system. The demodulation units 122a to 122n demodulate the received signal. The decoding units 123a to 123n decode the received signal. The A / D converters 124a to 124n convert the received signal from digital to analog. Synthesizer 125
Performs diversity combining of the received signals from the antenna elements 103a to 103n. For diversity combining, any of maximum ratio combining, equal gain ratio combining, and selective combining can be used. Note that by using maximum ratio combining,
It is possible to obtain the received signal with the best characteristics.

Next, the configuration of each unit for processing the transmission signal will be described. The D / A converters 126a to 126n convert the transmission signal from digital to analog. Encoding unit 127a
~ 127n encode the transmission signal. Modulator 128a
~ 128n modulates the transmission signal. Diffusion unit 129a-
129n multiplies the transmission signal by a spreading code to form a transmission signal of the code division multiple access system. Frequency converter 130a-
130n multiplies the modulated and spread transmission signal by a local signal to convert the transmission signal into an intermediate frequency of a frequency different for each transmission signal. The local oscillator 131 generates a local signal having an intermediate frequency. Filter unit 132a-
132n attenuates the frequency domain other than the desired signal domain with respect to the transmission signal after frequency conversion. E / O section 133a
.About.133n convert a transmission signal from an electric signal to an optical signal. The local transmitters 107, 115, 120, 131
Other than the synthesizing unit 125, n units are provided, and one synthesizing unit 125 is provided.

Next, the structure of the portion for transmitting an optical signal will be described. Between the E / O units 109a to 109n and the delay units 110a to 110n, between the delay units 110a to 110n and the O / E units 117a to 117n, and the E / O units 133a to 1
33n and the delay units 111a to 111n, and the delay unit 111.
a-111n and O / E parts 112a-112n, respectively, optical fiber cables 134a-134n, 135a-.
135n, 136a to 136n, 137a to 137n, and the base station apparatus 101 and the control station apparatus 102 are connected.
Are connected by an optical transmission line. The optical fiber cables 134a to 134n and 135a to 135n are for transmitting a reception signal, and the optical fiber cable 13
6a to 136n and 137a to 137n are for transmitting transmission signals. Optical fiber cables 134a-13
4n, 137a to 137n are arranged in the base station device 101. Also, the optical fiber cable 135a-
135n, 136a to 136n connect the base station apparatus 101 and the control station apparatus 102, and a plurality of them are provided in each of the reception signal transmission path and the transmission signal transmission path.
Since each of the delay units 110a to 110n and 111a to 111n is composed of an optical fiber cable having a different length, the delay units 110a to 110n and 111a are included.
The delay time can be changed every ~ 111n. Also,
The delay parts 110a to 110n and 111a to 111n are formed by spirally winding optical fiber cables having different lengths.

By the way, when an optical signal is transmitted and then converted from an optical signal to an electric signal for power amplification, a signal in an unnecessary frequency region is amplified and various noises are added. Examples of the noise include noise generated on a light emitting element such as an LD (laser diode) and an optical transmission path, shot noise generated on a light receiving element, and thermal noise generated on an amplifier. When a transmission signal including such noise is converted into a radio frequency and transmitted as a radio signal, a leaked radio signal is generated in a frequency range outside a desired frequency range. Therefore, the received signal and the transmitted signal are once converted into the frequency conversion units 106a to 106n,
114a-114n, 119a-119n, 130a-
At 130n, the intermediate frequency is converted to the filter 108a.
~ 108n, 113a to 113n, 118a to 118
n, 132a to 132n remove unnecessary frequency components at the intermediate frequency. Here, the intermediate frequency is a frequency lower than the radio frequency and higher than the received signal after combining or the transmitting signal before D / A conversion. For example, the transmission signal or the reception signal is 3.84 Mc
In the case of the W-CDMA system of ps, the radio frequency is 2G
It is in the Hz band, and the intermediate frequency is usually several hundred MHz.

FIG. 2 is a diagram showing an example of the frequency distribution of the electric power in the transmission signal, in which noise components 202 and 203 exist in a region away from the central frequency f of the desired signal 201. 3 is a frequency distribution of power of a transmission signal in which a noise component is removed by using a filter having an attenuation characteristic 302 without converting the transmission signal shown in FIGS. 3 and 2 into an intermediate frequency. In FIG. 3, the desired signal 301 is not attenuated, but the noise components 303 and 304 are attenuated. On the other hand, in FIG. 4, after converting the transmission signal shown in FIG. 2 to the intermediate frequency, a noise component is removed by applying the filter for the intermediate frequency of the attenuation characteristic 401 to the transmission signal of the intermediate frequency. In FIG. 4, since the intermediate frequency filter has a steep attenuation characteristic from a region separated from the intermediate frequency f by a predetermined frequency, the desired signal 402 is not attenuated and the noise components 403 and 404 are sufficiently attenuated. There is. From FIGS. 3 and 4, when the noise component is removed after the conversion to the intermediate frequency, the noise component is sufficiently attenuated.

Next, the wireless device 100 having the above configuration
The operation of will be described. First, the antenna element 103a
The case where ˜103n receives a signal will be described. A signal transmitted from a mobile station device (not shown) is received with a delay caused by each of the antenna elements 103a to 103n due to multipath or the like. Antenna elements 103a to 103n
The received signals received at are shared devices 104a to 104n.
Is further input to and amplified by the amplification units 105a to 105n,
It is output to the frequency conversion units 106a to 106n. The local transmitter 107 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency to generate the frequency converters 106a to 106a.
output to n. The frequency converters 106a to 106n multiply the received signal by a local signal, convert the received signal into an intermediate frequency of a frequency different for each received signal, and filter the filter unit 1.
It outputs to 08a-108n. Filter units 108a to 1
08n attenuates the frequency region other than the desired signal region with respect to the received signal after frequency conversion, and E / O units 109a to 109n.
Output to 109n.

Next, the E / O units 109a to 109n convert the electric signals into optical signals, and the delay units 110a to 110n.
It is output to n. At this time, each received signal is converted into an optical signal with a different frequency for each received signal. Next, in the delay units 110a to 110n, the received signals are delayed by a predetermined delay time, and the optical fiber cables 135a to 135n.
Output to 5n. At this time, the delay units 110a to 110n
Delay with a different delay time for each. Delay unit 110a-
The optical fiber cable constituting 110n includes the delay unit 1
Since the lengths are different for each of 10a to 110n, the delay unit 110 can reduce the loss caused when transmitting the optical fiber cable.
It differs for each a to 110n. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length. The reception signal is output from the delay units 110a to 110n to the optical fiber cables 135a to 135n, whereby the processing by the base station apparatus 101 is completed.

Next, the received signal is input from the optical fiber cables 135a to 135n to the O / E units 117a to 117n, and the processing in the control station device 102 starts from this. The O / E units 117a to 117n convert the received signal from an optical signal to an electric signal, and filter units 118a to 118n.
Output to. The filter units 118a to 118n attenuate the frequency region other than the desired signal region with respect to the received signal converted into the electric signal, and output the attenuated frequency region to the frequency conversion units 119a to 119n. The local transmitter 120 generates a local signal of an intermediate frequency and outputs it to the frequency converters 119a to 119n. The frequency conversion units 119a to 119n convert the received signal into a frequency that allows despreading and demodulation, and despreading unit 121.
a to 121n. Despreading units 121a to 121n
Is a demodulation unit 122a-1 after despreading the received signal.
22n. The demodulation units 122a to 122n demodulate the received signal and output it to the decoding units 123a to 123n. The decoding units 123a to 123n decode the received signals and output the decoded signals to the A / D conversion units 124a to 124n. A / D
The converters 124a to 124n convert the received signal from analog to digital and output the converted signal to the synthesizer 125. Synthesis part 1
In 25, the reception signals output from the respective A / D converters 124a to 124n are diversity-combined. This suppresses the effects of fading and interference waves,
A received signal with good characteristics can be obtained.

Next, the case of transmitting from the antenna elements 103a to 103n will be described. The signal to send is D
The A / A converters 126a to 126n convert from digital to analog and output to the encoders 127a to 127n.
Encoding sections 127a to 127n encode the transmission signal and output it to modulating sections 128a to 128n. Modulator 128a
~ 128n is the spreading unit 129a after modulating the transmission signal.
To 129n. The diffusion units 129a to 129n are
After the transmission signal is spread, the frequency converters 130a-1
Output to 30n. The local transmitter 131 generates a local signal of an intermediate frequency and outputs the frequency converters 130a to 130a.
output to n. The frequency conversion units 130a to 130n multiply the modulated and spread transmission signal by a local signal to convert the transmission signal into an intermediate frequency of a frequency different for each transmission signal, and the transmission signal after the frequency conversion is filtered from the filtering unit 132a to 130n.
It outputs to 132n.

The filter units 132a to 132n attenuate the frequency region other than the desired signal region with respect to the frequency-converted transmission signal, and output the attenuated frequency region to the E / O units 133a to 133n. The E / O units 133a to 133n convert electric signals into optical signals and output the optical signals to the optical fiber cables 136a to 136n. At this time, each transmission signal is converted into an optical signal with a different frequency for each transmission signal. As a result, the processing in the control station device 102 ends. Next, the transmission signal is input from the optical fiber cables 136a to 136n to the delay units 111a to 111n, from which the base station device 1
The process at 01 starts. Next, the delay units 111a-11
1n delays the transmission signal by a predetermined delay time to perform O / E.
It outputs to the parts 112a-112n. At this time, the delay unit 1
It is delayed by a different delay time for each of 11a to 111n. Since the optical fiber cables forming the delay units 111a to 111n have different lengths for the respective delay units 111a to 111n, the loss caused when transmitting the optical fiber cable also differs for each of the delay units 111a to 111n. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length. Next, the O / E units 112a to 112n convert the transmission signal from an optical signal to an electric signal to filter the signal.
3a to 113n.

The filter units 113a to 113n attenuate the frequency region other than the desired signal region with respect to the transmission signal converted into the electric signal and output it to the frequency conversion units 114a to 114n. The local oscillator 115 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency and outputs the local signal to the frequency converters 114a to 114n. Frequency converter 114a
Up to 114n multiply the transmission signal by the local signal to convert the frequency of the transmission signal into a radio frequency, and output the frequency-converted transmission signal to the amplification units 116a to 116n. The amplifiers 116a to 116n amplify the transmission signal to generate the duplexer 1.
The transmission signals are transmitted from the antenna elements 103a to 103n by outputting to 04a to 104n. In addition,
A transmission power control unit (not shown) of the base station device 101 transmits a control information signal including transmission power information to a transmission power control unit (not shown) of the control station device 102 to transmit each transmission signal. Of the transmission power value of the amplifiers 116a to 116
output to n.

When the wireless device 100 as described above is used in a relatively narrow space such as indoors, a plurality of antenna elements 103a are provided by the micro multi-path in which the difference in arrival time of signals passing through each path is smaller than the multi-path. -10n
At, a signal with a slight delay for each propagation path is received. The received signal by the micro multipath has a delay time of 1 chip time or less for each received signal, and cannot be combined by the rake method in the maximum ratio combining diversity method. Therefore, it is necessary to delay each received signal before combining them in the combining unit 125 so that the delay time for each received signal becomes 1 chip time (time per chip) or more. In such a case, the delay unit 11
If a delay of 1 chip time or more is generated for each received signal by 0a to 110n, the combined signal can be combined by the combining unit 125 to obtain a received signal by the rake method.

As described above, the wireless device 10 of the present embodiment
0, the delay units 110a to 110n and 111a to 1
Since 11n causes a delay in the optical signal, it can be delayed easily and for a required time. Also, the delay units 110a to 110n and 111a to 111n.
Since it is formed by winding an optical fiber cable, the delay unit can be formed with a simple structure, the base station apparatus 101 can be installed at low cost, and the base station apparatus 101 can be downsized. Also, the delay units 110a to 110n and 111a.
In order to make the optical fiber cables forming the ~ 111n spiral, delay time is increased, that is, even if the length of the optical fiber cables forming the delay sections 110a to 110n and 111a to 111n is lengthened, the delay sections 110a to 110n, The size of 111a to 111n can be reduced. Further, even when the delay time due to the micro multipath is small, the delay units 110a to 110n delay so as to generate a delay time of one chip time or more, so that the rake method synthesis can be performed, regardless of the environment used. Communication quality can be improved. Further, since the combining unit 125 is provided in the control station device 102, the base station device 101 can be downsized. Further, in the delay units 110a to 110n, optical signals of wavelengths with small loss are transmitted to long optical fiber cables, so that signals are not deteriorated even when a large delay is given. Further, since the transmission signal and the reception signal are converted into the intermediate frequency to remove the noise, the noise can be sufficiently attenuated.

The number of antenna elements 103a to 103n and the optical fiber cables 135a to 135n, 13 are provided.
The number of 6a to 136n is not particularly limited and can be set to any number. In addition, in the present embodiment, the delay unit 11
0a to 110n to the optical fiber cables 135a to 13
Although the output side to 5n and the delay units 111a to 111n are arranged on the input side of the optical fiber cables 136a to 136n, a plurality of delay units can be provided. That is,
Optical fiber cables 135a-135n, 136a-
In the middle of 136n, optical fiber cables 135a-13
5n output side, optical fiber cables 136a to 136
It is also possible to arrange it on the input side of n, and if the total of the delay times of all the delay units is the required delay time,
The same effect can be obtained.

(Second Embodiment) FIG. 5 is a diagram showing the configuration of radio apparatus 500 according to the second embodiment of the present invention.

In this embodiment, the delay section 110a is used.
110n and 111a to 111n are arranged in the control station device 502 instead of the base station device 501. In addition, the delay units 110a to 110n and 111a to 11
The configuration is the same as that of the above-described first embodiment except that 1n is arranged in the control station device 502, and thus the same reference numerals are given and the description thereof is omitted.

Radio apparatus 500 is mainly composed of base station apparatus 501 and control station apparatus 502. Base station device 50
1 is the antenna elements 103a to 103n and the duplexer 104.
a-104n, amplification sections 105a-105n, frequency conversion sections 106a-106n, local transmission section 107, filter sections 108a-108n, E / O sections 109a-109n, O
/ E units 112a to 112n, filter units 113a to 11
3n, frequency converters 114a to 114n, local transmitter 1
15 and amplification units 116a to 116n. Here, the amplification units 105a to 105n, the frequency conversion units 106a to 106n, the local transmission unit 107, and the filter unit 1
08a to 108n and E / O units 109a to 109n
The received signal is processed, and the O / E unit 112a ...
112n, filter units 113a to 113n, frequency conversion units 114a to 114n, local transmission unit 115, and amplification unit 1.
16a to 116n perform processing of transmission signals. Antenna elements 103a to 103n and duplexer 104
a to 104n are used for processing both the transmission signal and the reception signal.

The control station device 502 has delay units 110a-1.
10n, O / E units 117a to 117n, filter unit 11
8a to 118n, frequency conversion units 119a to 119n, local transmission unit 120, despreading units 121a to 121n, demodulation units 122a to 122n, decoding units 123a to 123n, A.
/ D converters 124a to 124n, synthesizer 125, D / A
The conversion units 126a to 126n and the encoding units 127a to 127.
n, modulation units 128a to 128n, diffusion units 129a to 12
9n, frequency converters 130a to 130n, local transmitter 1
31, filter units 132a to 132n, E / O unit 133
a to 133n and delay units 111a to 111n. Here, the delay units 110a to 110n, O / E
Units 117a to 117n, filter units 118a to 118
n, frequency converters 119a to 119n, local transmitter 12
0, despreaders 121a to 121n, demodulators 122a to 1
22n, decoding units 123a to 123n, A / D conversion unit 1
24a to 124n and the synthesizing unit 125 process received signals, and the D / A converting units 126a to 126n, the encoding units 127a to 127n, and the modulating units 128a to 128.
n, spreading units 129a to 129n, frequency conversion unit 130a.
-130n, local transmission part 131, filter part 132a-
132n, E / O units 133a to 133n, and delay unit 11
1a to 111n are for processing a transmission signal. It should be noted that n units are provided except for the local transmission units 107, 115, 120, 131 and the combining unit 125.
One 25 is provided.

Next, the structure of the portion for transmitting an optical signal will be described. Between the E / O units 109a to 109n and the delay units 110a to 110n, between the delay units 110a to 110n and the O / E units 117a to 117n, and the E / O units 133a to 1
33n and the delay units 111a to 111n, and the delay unit 111.
a-111n and O / E sections 112a-112n, respectively, optical fiber cables 503a-503n, 504a-
504n, 505a to 505n, and 506a to 506n are connected, and the base station device 501 and the control station device 502 are connected.
Are connected by an optical transmission line. The optical fiber cables 503a to 503n and 504a to 504n are for transmitting a reception signal, and the optical fiber cable 50
5a to 505n and 506a to 506n are for transmitting a transmission signal. Optical fiber cables 504a-50
4n and 505a to 505n are arranged in the control station device 502. Also, the optical fiber cable 503a-
503n and 506a to 506n connect the base station apparatus 501 and the control station apparatus 502, and a plurality of them are provided on each of the reception signal transmission path and the transmission signal transmission path.

Next, the wireless device 50 having the above configuration
The operation of 0 will be described. First, the antenna element 103
The case where a to 103n receive a signal will be described.
A signal transmitted from a mobile station device (not shown) is received with a delay caused by each of the antenna elements 103a to 103n due to multipath or the like. Antenna elements 103a to 103
The received signals received at n are shared devices 104a to 104.
From n, it is input to the amplification units 105a to 105n, amplified, and output to the frequency conversion units 106a to 106n. The local oscillator 107 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency to generate the frequency converters 106a to 1a.
Output to 06n. Frequency converters 106a to 106n
Multiplies the received signal by the local signal, converts the received signal into an intermediate frequency having a different frequency for each received signal, and outputs the intermediate frequency to the filter units 108a to 108n. Filter unit 108a
Up to 108n attenuate the frequency region other than the desired signal region with respect to the received signal after the frequency conversion and perform E / O unit 109.
a to 109n.

Next, in the E / O units 109a to 109n, electric signals are converted into optical signals and the optical fiber cable 5
03a to 503n. At this time, each received signal is converted into an optical signal with a different frequency for each received signal. This completes the processing by the base station device 501. Next, the received signal is the optical fiber cable 503a.
From ˜503n to the delay units 110a to 110n, and the control station device 502 starts processing from here. The delay units 110a to 110n delay the received signal by a predetermined delay time and output it to the O / E units 117a to 117n. At this time, the delay units 110a to 110n delay with different delay times. Since the optical fiber cables forming the delay units 110a to 110n have different lengths for the respective delay units 110a to 110n, the loss generated when transmitting the optical fiber cables also differs for each of the delay units 110a to 110n. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length.

The O / E units 117a to 117n convert the received signal from an optical signal into an electric signal, and the filter units 118a to 118n.
Output to 118n. Filter units 118a to 118n
The frequency conversion units 119a to 119a to attenuate the frequency region other than the desired signal region with respect to the received signal converted into the electric signal.
Output to 119n. The local transmission unit 120 generates a local signal of an intermediate frequency to generate the frequency conversion units 119a to 11a.
Output to 9n. The frequency conversion units 119a to 119n are
The received signal is converted into a frequency that can be despread and demodulated and output to the despreading units 121a to 121n. Despreader 121a
Up to 121n are demodulation units 1 after despreading the received signal.
22a to 122n. Demodulation units 122a to 122
n demodulates the received signal and decodes the decoding units 123a to 123n.
Output to. The decoding units 123a to 123n decode the received signals and output the decoded signals to the A / D conversion units 124a to 124n. The A / D converters 124 a to 124 n convert the received signal from analog to digital and output the converted signal to the synthesizer 125. In the synthesizing unit 125, each A / D converting unit 124a-
The reception signal output from 124n is diversity-combined. As a result, it is possible to suppress the effects of fading and interference waves and obtain a reception signal with good characteristics.

Next, the case of transmitting from the antenna elements 103a to 103n will be described. The signal to send is D
The A / A converters 126a to 126n convert from digital to analog and output to the encoders 127a to 127n.
Encoding sections 127a to 127n encode the transmission signal and output it to modulating sections 128a to 128n. Modulator 128a
~ 128n is the spreading unit 129a after modulating the transmission signal.
To 129n. The diffusion units 129a to 129n are
After the transmission signal is spread, the frequency converters 130a-1
Output to 30n. The local transmitter 131 generates a local signal of an intermediate frequency and outputs the frequency converters 130a to 130a.
output to n. The frequency conversion units 130a to 130n multiply the modulated and spread transmission signal by a local signal to convert the transmission signal into an intermediate frequency of a frequency different for each transmission signal, and the transmission signal after the frequency conversion is filtered from the filtering unit 132a to 130n.
It outputs to 132n.

The filter units 132a to 132n attenuate the frequency region other than the desired signal region with respect to the frequency-converted transmission signal and output it to the E / O units 133a to 133n. The E / O units 133a to 133n convert the electric signals into optical signals and output the optical signals to the delay units 111a to 111n. At this time, each transmission signal is converted into an optical signal with a different frequency for each transmission signal. The delay units 111a to 111n delay the transmission signal by a predetermined delay time and output it to the optical fiber cables 506a to 506n. At this time, the delay units 111a to 111n are delayed by different delay times. Since the optical fiber cables forming the delay units 111a to 111n have different lengths for the respective delay units 111a to 111n, the loss caused when transmitting the optical fiber cable also differs for each of the delay units 111a to 111n. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length. When the delay units 111a to 111n output to the optical fiber cables 506a to 506n, the processing in the control station device 501 ends.

Next, the transmission signal is input from the optical fiber cables 506a to 506n to the O / E units 112a to 112n, and the processing of the base station apparatus 501 starts from here. The O / E units 112a to 112n convert the transmission signal from an optical signal to an electric signal and filter the units 113a to 113n.
Output to. The filter units 113a to 113n attenuate the frequency region other than the desired signal region with respect to the transmission signal converted into the electric signal, and output the attenuated frequency region to the frequency conversion units 114a to 114n. The local oscillator 115 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency and outputs the local signal to the frequency converters 114a to 114n. Frequency converter 114a
Up to 114n multiply the transmission signal by the local signal to convert the frequency of the transmission signal into a radio frequency, and output the frequency-converted transmission signal to the amplification units 116a to 116n. The amplifiers 116a to 116n amplify the transmission signal to generate the duplexer 1.
The transmission signals are transmitted from the antenna elements 103a to 103n by outputting to 04a to 104n. In addition,
Each transmission signal is transmitted by transmitting a control information signal including transmission power information from a transmission power control unit (not shown) of the base station device 501 to a transmission power control unit (not shown) of the control station device 502. Of the transmission power value of the amplifiers 116a to 116
output to n.

As described above, the wireless device 50 of the present embodiment
0, the delay units 110a to 110n and 111a to 1
Since 11n causes a delay in the optical signal, it can be delayed easily and for a required time. Also, the delay units 110a to 110n and 111a to 111n.
Is formed by winding an optical fiber cable, the delay unit can be formed with a simple structure, the base station device 501 can be installed at low cost, and the base station device 501 can be downsized. Also, the delay units 110a to 110n and 111a.
In order to make the optical fiber cables forming the ~ 111n spiral, delay time is increased, that is, even if the length of the optical fiber cables forming the delay sections 110a to 110n and 111a to 111n is lengthened, the delay sections 110a to 110n, The size of 111a to 111n can be reduced. The combining unit 125 and the delay units 110a to 110n, 11
Since 1a to 111n are provided in the control station device 502, the base station device 501 can be inexpensively installed and the base station device 5 can be installed.
01 can be miniaturized. In addition, even if the delay time due to the micro multipath is short, the delay units 110a to 110n
Since it is delayed so as to generate a delay time of 1 chip time or more, the rake combining can be performed, and the communication quality can be improved regardless of the environment used. Further, in the delay units 110a to 110n, optical signals of wavelengths with small loss are transmitted to long optical fiber cables, so that signals are not deteriorated even when a large delay is given. Further, since the transmission signal and the reception signal are converted into the intermediate frequency to remove the noise, the noise can be sufficiently attenuated.

The number of antenna elements 103a to 103n and the optical fiber cables 503a to 503n, 50 are used.
The number of 6a to 506n is not particularly limited and can be set to any number. In addition, in the present embodiment, the delay unit 11
0a to 110n are optical fiber cables 503a to 50n
Although it is arranged on the output side to 3n and the delay units 111a to 111n are arranged on the input side of the optical fiber cables 503a to 503n, a plurality of delay units can be provided. That is, the optical fiber cables 503a to 503n, 50
6a to 506n, optical fiber cable 503a
~ 503n input side, optical fiber cable 506a ~
It is also possible to arrange it on the output side of 506n, and the same effect can be obtained if the sum of the delay times of all the delay units is the required delay time.

(Embodiment 3) FIG. 6 is a diagram showing the configuration of radio apparatus 600 according to Embodiment 3 of the present invention.

In this embodiment, the delay section 110a is used.
110n and 111a to 111n are arranged outside the base station device 601 and the control station device 602 and on the optical transmission path between the base station device 601 and the control station device 602. The delay units 110a to 110n, 11
Except for the positions where 1a to 111n are arranged, the structure is the same as that of the above-described first embodiment, and therefore the same reference numerals are given and the description thereof is omitted.

Radio apparatus 600 is mainly composed of base station apparatus 601 and control station apparatus 602. Base station device 60
1 is the antenna elements 103a to 103n and the duplexer 104.
a-104n, amplification sections 105a-105n, frequency conversion sections 106a-106n, local transmission section 107, filter sections 108a-108n, E / O sections 109a-109n, O
/ E units 112a to 112n, filter units 113a to 11
3n, frequency converters 114a to 114n, local transmitter 1
15 and amplification units 116a to 116n. Here, the amplification units 105a to 105n, the frequency conversion units 106a to 106n, the local transmission unit 107, and the filter unit 1
08a to 108n and E / O units 109a to 109n
The received signal is processed, and the O / E unit 112a ...
112n, filter units 113a to 113n, frequency conversion units 114a to 114n, local transmission unit 115, and amplification unit 1.
16a to 116n perform processing of transmission signals. Antenna elements 103a to 103n and duplexer 104
a to 104n are used for processing both the transmission signal and the reception signal.

The control station device 602 includes the O / E section 117a ...
117n, filter units 118a to 118n, frequency conversion units 119a to 119n, local transmission unit 120, despreading unit 1
21a to 121n, demodulation units 122a to 122n, decoding units 123a to 123n, and A / D conversion units 124a to 124.
n, the synthesizing unit 125, the D / A converting units 126a to 126n,
Encoding units 127a to 127n, modulation units 128a to 128
n, spreading units 129a to 129n, frequency conversion unit 130a.
-130n, local transmission part 131, filter part 132a-
132n and E / O units 133a to 133n. Here, the O / E units 117a to 117n, the filter units 118a to 118n, and the frequency conversion units 119a to 11n.
9n, local transmitter 120, despreaders 121a to 121
n, demodulation units 122a to 122n, and decoding units 123a to 1
23n, A / D converters 124a to 124n, and a synthesizer 1
Reference numeral 25 is for processing received signals, and includes D / A converters 126a to 126n, encoders 127a to 127n, modulators 128a to 128n, and spreaders 129a to 129n.
Frequency conversion units 130a to 130n, a local transmission unit 131,
Filter units 132a to 132n and E / O unit 133a to
133n processes a transmission signal. Delay part 1
10a to 110n and 111a to 111n are outside the base station apparatus 601 and the control station apparatus 602 and are the base station apparatus 6
01 and the control station device 602 are arranged on the optical transmission line. The delay units 110a to 110n process received signals, and the delay units 111a to 111n process transmitted signals. The local transmitters 107, 11
Except for 5, 120, 131 and the synthesizing unit 125, n units are provided, and one synthesizing unit 125 is provided.

Next, the structure of the portion for transmitting an optical signal will be described. Between the E / O units 109a to 109n and the delay units 110a to 110n, between the delay units 110a to 110n and the O / E units 117a to 117n, and the E / O units 133a to 1
33n and the delay units 111a to 111n, and the delay unit 111.
a-111n and O / E parts 112a-112n, respectively, optical fiber cables 603a-603n, 604a-.
604n, 605a to 605n, 606a to 606n are connected, and the base station device 601 and the control station device 602 are connected.
Are connected by an optical transmission line. The optical fiber cables 603a to 603n and 604a to 604n are for transmitting a reception signal, and the optical fiber cable 60
5a to 605n and 606a to 606n are for transmitting a transmission signal. Also, an optical fiber cable 603a
~ 603n, 604a to 604n, 605a to 605
n, 606a to 606n connect the base station device 601 and the control station device 602, and a plurality of them are provided in each of the reception signal transmission path and the transmission signal transmission path.

Next, the wireless device 60 having the above configuration
The operation of 0 will be described. First, the antenna element 103
The case where a to 103n receive a signal will be described.
A signal transmitted from a mobile station device (not shown) is received with a delay caused by each of the antenna elements 103a to 103n due to multipath or the like. Antenna elements 103a to 103
The received signals received at n are shared devices 104a to 104.
From n, it is input to the amplification units 105a to 105n, amplified, and output to the frequency conversion units 106a to 106n. The local oscillator 107 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency to generate the frequency converters 106a to 1a.
Output to 06n. Frequency converters 106a to 106n
Multiplies the received signal by the local signal, converts the received signal into an intermediate frequency having a different frequency for each received signal, and outputs the intermediate frequency to the filter units 108a to 108n. Filter unit 108a
Up to 108n attenuate the frequency region other than the desired signal region with respect to the received signal after the frequency conversion and perform E / O unit 109.
a to 109n.

Next, in the E / O units 109a to 109n, electric signals are converted into optical signals and the optical fiber cable 6
03a to 603n. At this time, each received signal is converted into an optical signal with a different frequency for each received signal. This completes the processing by the base station device 601. Next, the received signal is an optical fiber cable 603a.
˜603n to the delay units 110a to 110n.
The delay units 110a to 110n delay the received signal by a predetermined delay time to delay the optical fiber cables 604a to 604.
output to n. At this time, the delay units 110a to 110n delay with different delay times. Delay units 110a to 11
The optical fiber cable that constitutes 0n includes the delay unit 110.
Since the lengths are different for each of a to 110n, the loss caused when transmitting the optical fiber cable also causes the delay unit 110a to.
It differs for every 110n. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length. next,
Received signals are optical fiber cables 604a to 604n
To the O / E units 117a to 117n, and the control station device 602 starts processing from here. O / E section 117a
-117n convert a received signal into an electric signal from an optical signal, and output it to filter parts 118a-118n.

The filter units 118a to 118n attenuate the frequency region other than the desired signal region with respect to the received signal converted into the electric signal, and output it to the frequency conversion units 119a to 119n. The local transmitter 120 generates a local signal of an intermediate frequency and outputs it to the frequency converters 119a to 119n. The frequency conversion units 119a to 119n convert the received signal into a frequency that allows despreading and demodulation, and despreading unit 121.
a to 121n. Despreading units 121a to 121n
Is a demodulation unit 122a-1 after despreading the received signal.
22n. The demodulation units 122a to 122n demodulate the received signal and output it to the decoding units 123a to 123n. The decoding units 123a to 123n decode the received signals and output the decoded signals to the A / D conversion units 124a to 124n. A / D
The converters 124a to 124n convert the received signal from analog to digital and output the converted signal to the synthesizer 125. Synthesis part 1
In 25, the reception signals output from the respective A / D converters 124a to 124n are diversity-combined. This suppresses the effects of fading and interference waves,
A received signal with good characteristics can be obtained.

Next, the case of transmitting from the antenna elements 103a to 103n will be described. The signal to send is D
The A / A converters 126a to 126n convert from digital to analog and output to the encoders 127a to 127n.
Encoding sections 127a to 127n encode the transmission signal and output it to modulating sections 128a to 128n. Modulator 128a
~ 128n is the spreading unit 129a after modulating the transmission signal.
To 129n. The diffusion units 129a to 129n are
After the transmission signal is spread, the frequency converters 130a-1
Output to 30n. The local transmitter 131 generates a local signal of an intermediate frequency and outputs the frequency converters 130a to 130a.
output to n. The frequency conversion units 130a to 130n multiply the modulated and spread transmission signal by a local signal to convert the transmission signal into an intermediate frequency of a frequency different for each transmission signal, and the transmission signal after the frequency conversion is filtered from the filtering unit 132a to 130n.
It outputs to 132n.

The filter units 132a to 132n attenuate the frequency region other than the desired signal region with respect to the frequency-converted transmission signal and output it to the E / O units 133a to 133n. The E / O units 133a to 133n convert electric signals into optical signals and output the optical signals to the optical fiber cables 605a to 605n. At this time, each transmission signal is converted into an optical signal with a different frequency for each transmission signal. As a result, the processing in the control station device 602 ends. Next, the transmission signal is input from the optical fiber cables 605a to 605n to the delay units 111a to 111n. Next, the delay unit 111
a to 111n delay the transmission signal by a predetermined delay time and output it to the optical fiber cables 606a to 606n. At this time, the delay units 111a to 111n delay with different delay times. The optical fiber cables forming the delay units 111a to 111n are the same as the delay units 111a to 111n.
Since the length is different for each n, the loss generated when transmitting the optical fiber cable is also different for each delay unit 111a to 111n. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length.

Next, the transmission signal is input from the optical fiber cables 606a to 606n to the O / E units 112a to 112n, from which the processing by the base station apparatus 601 starts. The O / E units 112a to 112n convert the transmission signal from an optical signal to an electric signal and filter the units 113a to 113.
output to n. The filter units 113a to 113n attenuate the frequency region other than the desired signal region with respect to the transmission signal converted into the electric signal, and the frequency conversion units 114a to 114n.
Output to. The local oscillator 115 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency and outputs the local signal to the frequency converters 114a to 114n. Frequency converter 114
a to 114n multiply the transmission signal by the local signal to convert the frequency of the transmission signal into a radio frequency, and output the frequency-converted transmission signal to the amplification units 116a to 116n. The amplification units 116a to 116n amplify the transmission signal and output the amplified transmission signal to the duplexers 104a to 104n, whereby the transmission signal is transmitted from the antenna elements 103a to 103n. It should be noted that a control information signal including transmission power information is transmitted from a transmission power control unit (not shown) of the base station device 601 to a transmission power control unit (not shown) of the control station device 602, and The transmission power value of the transmission signal is amplified by the amplification units 116a to 11a.
Output to 6n.

As described above, the radio device 60 of the present embodiment
0, the delay units 110a to 110n and 111a to 1
Since 11n causes a delay in the optical signal, it can be delayed easily and for a required time. Moreover, since the delay units 110a to 110n and 111a to 111n are provided outside the base station device 601 and the control station device 602, the base station device 601 and the control station device 602 can be installed at low cost and both can be downsized. Further, since the delay units 110a to 110n and 111a to 111n are formed by winding an optical fiber cable, the delay unit can be formed with a simple structure, the base station device 601 can be installed at low cost, and the base station device 601 can be installed. Can be miniaturized. Further, in order to make the optical fiber cables forming the delay units 110a to 110n and 111a to 111n spiral,
When increasing the delay time, that is, the delay units 110a-
Even when the length of the optical fiber cables forming 110n and 111a to 111n is increased, the delay units 110a to 1 are used.
10n and 111a to 111n can be miniaturized. Further, even when the delay time due to the micro multipath is small, the delay units 110a to 110n delay so as to generate a delay time of one chip time or more, so that the rake method synthesis can be performed, regardless of the environment used. Communication quality can be improved. Further, in the delay units 110a to 110n, optical signals of wavelengths with small loss are transmitted to long optical fiber cables, so that signals are not deteriorated even when a large delay is given. Further, since the transmission signal and the reception signal are converted into the intermediate frequency to remove the noise, the noise can be sufficiently attenuated.

The number of antenna elements 103a to 103n and the optical fiber cables 603a to 603n, 60 are set.
4a to 604n, 605a to 605n, 606a to 60
The number of 6n is not particularly limited, and can be any number. In addition, in this embodiment, the delay units 110a to 11a are used.
Although 0n and 111a to 111n are provided on the optical transmission path between the base station device 601 and the control station device 602, a plurality of delay units can be provided. That is, the input side of the optical fiber cables 603a to 603n and 605a to 605n, and the optical fiber cables 604a to 604n and 606.
It is also possible to arrange them on the output side of a to 606n, and the same effect can be obtained if the sum of the delay times of all the delay units is the required delay time.

(Embodiment 4) FIG.7 is a diagram showing the configuration of radio apparatus 700 according to Embodiment 4 of the present invention.

In the present embodiment, the radio equipment 100 in the above-mentioned Embodiment 1 is provided with multiplexing sections 701 and 702 and demultiplexing sections 703 and 704, and further, an optical fiber cable as an optical transmission line is used for transmission and reception. The case of using two will be described. It should be noted that, except that the multiplexing units 701 and 702 and the demultiplexing units 703 and 704 are provided, and that the optical fiber cable is provided for two for transmission and two for reception, the same configuration as that of the above-described first embodiment is used, and therefore the same reference numerals are used. The description is omitted.

Radio apparatus 700 is mainly composed of base station apparatus 705 and control station apparatus 706. Base station device 70
Reference numeral 5 denotes antenna elements 103a to 103n and duplexer 104.
a-104n, amplification sections 105a-105n, frequency conversion sections 106a-106n, local transmission section 107, filter sections 108a-108n, E / O sections 109a-109n, delay sections 110a-110n, multiplexing section 701, demultiplexing section 70.
4, delay units 111a to 111n, O / E units 112a to 1
12n, separation unit 704, filter units 113a to 113
n, frequency converters 114a to 114n, local transmitter 11
5 and amplifiers 116a to 116n. Here, the amplification units 105a to 105n, the frequency conversion units 106a to 106n, the local transmission unit 107, and the filter unit 1
08a to 108n, E / O sections 109a to 109n, delay sections 110a to 110n, and multiplexing section 701 perform processing of received signals, and separation section 704 and delay section 111a to.
111n, O / E units 112a to 112n, separation unit 70
4, filter units 113a to 113n, frequency conversion unit 11
4a to 114n, local transmitter 115 and amplifier 116a
116n is for processing the transmission signal. Antenna elements 103a to 103n and duplexers 104a to 104
n is used for processing both the transmission signal and the reception signal.

The control station device 706 includes a separating unit 703, O /
E units 117a to 117n, separating unit 703, filter unit 1
18a to 118n, frequency converters 119a to 119n,
Local transmission section 120, despreading sections 121a to 121n, demodulation sections 122a to 122n, decoding sections 123a to 123n,
A / D converters 124a to 124n, synthesizer 125, D /
A conversion units 126a to 126n, encoding units 127a to 12
7n, modulators 128a to 128n, diffusers 129a to 1
29n, frequency converters 130a to 130n, local oscillator 131, filter units 132a to 132n, E / O unit 13
3a to 133n and a multiplexing unit 702.
Here, the separation unit 703, the O / E units 117a to 117n,
Filter units 118a to 118n and frequency conversion unit 119a
-119n, local transmitter 120, despreader 121a-1
21n, demodulation units 122a to 122n, and decoding unit 123a.
-123n, A / D converters 124a-124n, and synthesizer 125 process received signals, and D / A converters 126a-126n and encoders 127a-127.
n, modulation units 128a to 128n, diffusion units 129a to 12
9n, frequency converters 130a to 130n, local transmitter 1
31, filter units 132a to 132n, E / O unit 133
The a to 133n and the multiplexing unit 702 process the transmission signal.

Multiplexers 701 and 702 multiplex the received signals converted by the frequency converters 106a to 106n at different frequencies by frequency. Separation unit 70
Signals 3 and 704 separate and extract signals in units of a predetermined frequency domain. The multiplexing units 701 and 702 and the demultiplexing unit 70
3, 704, local transmitters 107, 115, 120, 13
Except for 1 and the synthesizing section 125, n pieces are provided,
One combining unit 125 is provided.

Next, the structure of the portion for transmitting an optical signal will be described. Between the E / O units 109a to 109n and the delay units 110a to 110n, between the delay units 110a to 110n and the multiplexing unit 701, between the multiplexing unit 701 and the demultiplexing unit 703, between the demultiplexing unit 703 and the O / E units 117a to 117n, E / O part 1
33a to 133n and the multiplexer 702, between the multiplexer 702 and the separator 704, and between the separator 704 and the delay units 111a to 111.
n and delay units 111a to 111n and O / E unit 112a.
-112n, optical fiber cables 707a-
707n, 708a to 708n, 709, 710a to 7
10n, 711a to 711n, 712, 713a to 71
3n, 714a to 714n, and the base station device 705 and the control station device 706 are connected by an optical transmission line. Optical fiber cables 707a-707n,
708a to 708n, 709, 710a to 710n are
Received signals are transmitted, and optical fiber cables 711a to 711n, 712, 713a to 713n, 7
14a to 714n are for transmitting a transmission signal. Optical fiber cables 707a to 707n and 708a to 7
08n, 713a to 713n, 714a to 714n,
It is arranged in the base station device 705, and the optical fiber cables 710a to 710n and 711a to 711n are arranged in the control station device 706. Further, the optical fiber cables 709 and 712 connect the base station device 705 and the control station device 706, and in order to multiplex the reception signal in the multiplexing unit 701 or the transmission signal in the multiplexing unit 702, the base station device There are only two optical transmission lines between the optical fiber cable 709 for transmitting the reception signal and the optical fiber cable 712 for transmitting the transmission signal between the control station device 706 and the control station device 706.

Next, the wireless device 70 having the above configuration
The operation of 0 will be described. First, the antenna element 103
The case where a to 103n receive a signal will be described.
A signal transmitted from a mobile station device (not shown) is received with a delay caused by each of the antenna elements 103a to 103n due to multipath or the like. Antenna elements 103a to 103
The received signals received at n are shared devices 104a to 104.
From n, it is input to the amplification units 105a to 105n, amplified, and output to the frequency conversion units 106a to 106n. The local oscillator 107 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency to generate the frequency converters 106a to 1a.
Output to 06n. Frequency converters 106a to 106n
Multiplies the received signal by the local signal, converts the received signal into an intermediate frequency having a different frequency for each received signal, and outputs the intermediate frequency to the filter units 108a to 108n. Filter unit 108a
Up to 108n attenuate the frequency region other than the desired signal region with respect to the received signal after the frequency conversion and perform E / O unit 109.
a to 109n. E / O units 109a to 109n
Converts the received signal from an electric signal into an optical signal and outputs it to the delay units 110a to 110n. At this time, each received signal is converted into an optical signal with a different frequency for each received signal.

Next, delay sections 110a to 110n delay the received signal by a predetermined delay time and output it to multiplexing section 701. At this time, the delay units 110a to 110n delay with different delay times. The optical fiber cables forming the delay units 110a to 110n are the delay units 110a to 11n.
Since the length is different for each 0n, the loss generated when transmitting the optical fiber cable also delays 110a to 110n.
Different for each. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length. Multiplexer 701
Multiplexes a plurality of received signals, combines them into one, and outputs them collectively to the optical fiber cable 709. This completes the processing by the base station device 705. Next, the received signal is separated from the optical fiber cable 709 by the separating unit 70.
3, and the processing in the control station device 706 starts from here. Separation section 703 separates and extracts the received signal in units of a predetermined frequency region, and outputs the extracted received signal to O / E sections 117a to 117n. O / E section 117a-1
17n converts the received signal from an optical signal into an electric signal, and outputs the electric signal to the filter units 118a to 118n.

The filter units 118a to 118n attenuate the frequency region other than the desired signal region with respect to the received signal converted into the electric signal and output it to the frequency conversion units 119a to 119n. The local transmitter 120 generates a local signal of an intermediate frequency and outputs it to the frequency converters 119a to 119n. The frequency conversion units 119a to 119n convert the received signal into a frequency that allows despreading and demodulation, and despreading unit 121.
a to 121n. Despreading units 121a to 121n
Is a demodulation unit 122a-1 after despreading the received signal.
22n. The demodulation units 122a to 122n demodulate the received signal and output it to the decoding units 123a to 123n. The decoding units 123a to 123n decode the received signals and output the decoded signals to the A / D conversion units 124a to 124n. A / D
The converters 124a to 124n convert the received signal from analog to digital and output the converted signal to the synthesizer 125. Synthesis part 1
In 25, the reception signals output from the respective A / D converters 124a to 124n are diversity-combined. This suppresses the effects of fading and interference waves,
A received signal with good characteristics can be obtained.

Next, the case of transmitting from the antenna elements 103a to 103n will be described. The signal to send is D
The A / A converters 126a to 126n convert from digital to analog and output to the encoders 127a to 127n.
Encoding sections 127a to 127n encode the transmission signal and output it to modulating sections 128a to 128n. Modulator 128a
~ 128n is the spreading unit 129a after modulating the transmission signal.
To 129n. The diffusion units 129a to 129n are
After the transmission signal is spread, the frequency converters 130a-1
Output to 30n. The local transmitter 131 generates a local signal of an intermediate frequency and outputs the frequency converters 130a to 130a.
output to n. The frequency conversion units 130a to 130n multiply the modulated and spread transmission signal by a local signal to convert the transmission signal into an intermediate frequency of a frequency different for each transmission signal, and the transmission signal after the frequency conversion is filtered from the filtering unit 132a to 130n.
It outputs to 132n.

The filter units 132a to 132n attenuate the frequency region other than the desired signal region with respect to the frequency-converted transmission signal and output the attenuated signal to the E / O units 133a to 133n. The E / O units 133a to 133n convert the electric signal into an optical signal and output the optical signal to the multiplexing unit 702. At this time, each transmission signal is converted into an optical signal with a different frequency for each transmission signal. The multiplexing unit 702 multiplexes the transmission signals by frequency and outputs them to the optical fiber cable 712 collectively.
This completes the processing in the control station device 706. Next, the transmission signal is input from the optical fiber cable 712 to the separation unit 704, and the processing of the base station device 705 starts from here. The separation unit 704 separates and extracts the transmission signal in units of a predetermined frequency domain, and outputs each extracted transmission signal to the delay units 111a to 111n. Delay part 1
11a to 111n delay the transmission signal by a predetermined delay time and output it to the O / E units 112a to 112n. At this time, the delay units 111a to 111n delay with different delay times. Since the optical fiber cables forming the delay units 111a to 111n have different lengths for the respective delay units 111a to 111n, the loss caused when transmitting the optical fiber cable also differs for each of the delay units 111a to 111n.
Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length. Next, the O / E units 112a to 1
12 n converts a transmission signal from an optical signal into an electric signal and outputs the electric signal to the separation unit 704.

Separation section 704 separates and extracts the transmission signal in units of a predetermined frequency domain, and outputs each of the extracted transmission signals to filter sections 113a to 113n. The filter units 113a to 113n attenuate the frequency region other than the desired signal region with respect to the transmission signal converted into the electric signal, and output the attenuated frequency region to the frequency conversion units 114a to 114n. The local oscillator 115 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency and outputs the local signal to the frequency converters 114a to 114n. The frequency conversion units 114 a to 114 n multiply the transmission signal by the local signal to convert the frequency of the transmission signal into a radio frequency, and amplify the transmission signal after frequency conversion into the amplification unit 116.
a to 116n. Amplifiers 116a to 116n
Amplifies the transmission signal and outputs the amplified signal to the duplexers 104a to 104n.
The transmission signal is transmitted from.

The transmission paths of the received signal or the transmitted signal to be transmitted are one for the received signal and the other for the transmitted signal from the multiplexing section 701 to the demultiplexing section 703 and from the multiplexing section 702 to the demultiplexing section 704, respectively. -10
n to the multiplexer 701, the separator 703 to the synthesizer 125, and the D / A converters 126a to 126n to the multiplexer 702.
Up to and from the separating unit 704 to the antenna elements 103a to 10a
There is a plurality up to 3n. It should be noted that a transmission power control unit (not shown) of the base station device 705 transmits a control information signal including transmission power information to a transmission power control unit (not shown) of the control station device 706. The transmission power value of the transmission signal is output to the amplification units 116a to 116n.

As described above, the wireless device 70 of the present embodiment
According to 0, in addition to the effect of the first embodiment, signals are multiplexed by the multiplexing units 701 and 702 and transmitted between the base station device 705 and the control station device 706 by the optical fiber cables 708a to 708n and 709. Therefore, only one transmission line is required for each of the transmission line and the reception line, so that the base station apparatus 705 and the control station apparatus 706 can be installed at a low cost with a simple structure. Further, since there is one optical fiber cable 709 for reception and one optical fiber cable 712 for transmission, the base station device 705 and the control station device 7 are provided.
During the transmission between 06, external influences such as temperature changes affect the transmission signal and the reception signal under the same conditions, respectively, and the delay time does not vary due to different factors and conditions to cause an error. Further, since the transmission signal and the reception signal are converted into the intermediate frequency to remove the noise, the noise can be sufficiently attenuated.

The number of antenna elements 103a to 103n is not particularly limited, and can be any number. Further, the present invention is also applicable to the case where the received signal and a part of the transmitted signal are respectively multiplexed, or the case where the transmitted signal or the received signal is divided into a plurality of groups and then multiplexed for each group. In addition, the delay units 110a to 110n and 111.
a-111n, multiplexing units 701 and 702, and demultiplexing unit 70
3 and 704, if delay processing is performed with an optical signal, they may be provided at any position such as when they are provided on the control station device 706 side or when they are provided outside the base station device 705 and the control station device 706. The same effect can be obtained by setting the total delay time of the delay units to the required delay time. In addition, the delay units 110a to 110 without converting to the intermediate frequency.
The same effect can be obtained even if the delay is performed at n and 111a to 111n. In addition, the diffusion units 129a to 129n
Also, the same effect can be obtained without providing the despreading units 121a to 121n. Further, the multiplexing method in the multiplexing units 701 and 702 is not limited to frequency multiplexing, and the same applies when wavelength multiplexing or time division multiplexing is performed in which the wavelength is changed for each of a plurality of reception signals or transmission signals. The effect of is obtained.

Also, the base station device 705 and the control station device 70
The structure can be simplified by further multiplexing the optical transmission lines between 6 by changing the frequency, the wavelength, or the like, and combining the optical transmission lines for reception and transmission into one optical transmission line. In addition, the base station device 705 and the control station device 706 can be installed at a lower cost, and the base station device 705 and the control station device 706 can be downsized.

(Embodiment 5) FIG.8 is a diagram showing the configuration of radio apparatus 800 according to Embodiment 5 of the present invention.

In this embodiment, a case will be described where base station apparatus 101 and control station apparatus 102 in above Embodiment 1 are combined into one radio apparatus 800.
It should be noted that, except that the base station apparatus 101 and the control station apparatus 102 are combined into one, the configuration is the same as that of the above-described first embodiment, and therefore the same reference numerals are given and the description thereof is omitted.

Radio apparatus 800 includes antenna element 103a.
˜103n, duplexers 104a to 104n, amplifier 105
a-105n, frequency conversion units 106a-106n, local transmission unit 107, filter units 108a-108n, E / O
Sections 109a-109n, delay sections 110a-110n, O
/ E sections 117a to 117n, filter sections 118a to 11
8n, frequency converters 119a to 119n, local transmitter 1
20, despreaders 121a to 121n, demodulators 122a to
122n, decoding sections 123a to 123n, A / D conversion sections 124a to 124n, combining section 125, D / A conversion section 12
6a to 126n, encoders 127a to 127n, modulators 128a to 128n, spreaders 129a to 129n, frequency converters 130a to 130n, local oscillator 131, filter units 132a to 132n, E / O units 133a to 133.
n, delay units 111a to 111n, O / E units 112a to 1
12n, filter units 113a to 113n, frequency conversion units 114a to 114n, local transmission unit 115, and amplification unit 11.
6a to 116n. Here, the amplification units 105a to 105n and the frequency conversion units 106a to 106n.
n, local transmission unit 107, filter units 108a to 108
n, E / O units 109a to 109n, delay units 110a to 1
10n, O / E units 117a to 117n, filter unit 11
8a to 118n, frequency conversion units 119a to 119n, local transmission unit 120, despreading units 121a to 121n, demodulation units 122a to 122n, decoding units 123a to 123n, A.
The D / D converters 124a to 124n and the synthesizer 125 process received signals. On the other hand, the D / A converter 12
6a to 126n, encoders 127a to 127n, modulators 128a to 128n, spreaders 129a to 129n, frequency converters 130a to 130n, local oscillator 131, filter units 132a to 132n, E / O units 133a to 133.
n, delay units 111a to 111n, O / E units 112a to 1
12n, filter units 113a to 113n, frequency conversion units 114a to 114n, local transmission unit 115, and amplification unit 11.
6a to 116n perform processing of transmission signals. Antenna elements 103a to 103n and duplexers 104a to 1
04n is used for processing both the transmission signal and the reception signal. The local transmitters 107, 115, 120, 131
Other than the synthesizing unit 125, n units are provided, and one synthesizing unit 125 is provided.

Next, the structure of the portion for transmitting an optical signal will be described. Between the E / O units 109a to 109n and the delay units 110a to 110n, between the delay units 110a to 110n and the O / E units 117a to 117n, and the E / O units 133a to 1
33n and the delay units 111a to 111n, and the delay unit 111.
a-111n and O / E sections 112a-112n, respectively, optical fiber cables 801a-801n, 802a-
802n, 803a to 803n, and 804a to 804n are connected. Optical fiber cables 801a-80
1n and 802a to 802n are for transmitting a reception signal, and are optical fiber cables 803a to 803n and 8n.
Reference numerals 04a to 804n are for transmitting a transmission signal, and a plurality of them are provided in each. Optical fiber cables 801a-801n, 802a-802n, 803a-
803n and 804a to 804n are housed in the wireless device 800. A transmission power control unit (not shown) of the wireless device 800 transmits a control information signal including transmission power information to the transmission power control unit, and the transmission power values of the respective transmission signals are amplified by the amplification units 116a to 116n. Output to.

Next, radio apparatus 800 having the above configuration
The operation of will be described. First, the antenna element 103a
The case where ˜103n receives a signal will be described. A signal transmitted from a mobile station device (not shown) is received with a delay caused by each of the antenna elements 103a to 103n due to multipath or the like. Antenna elements 103a to 103n
The received signals received at are shared devices 104a to 104n.
Is further input to and amplified by the amplification units 105a to 105n,
It is output to the frequency conversion units 106a to 106n. The local transmitter 107 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency to generate the frequency converters 106a to 106a.
output to n. The frequency converters 106a to 106n multiply the received signal by a local signal, convert the received signal into an intermediate frequency of a frequency different for each received signal, and filter the filter unit 1.
It outputs to 08a-108n.

Filter units 108a-108n attenuate the frequency region other than the desired signal region with respect to the received signal after frequency conversion, and output it to E / O units 109a-109n. Next, the E / O units 109a to 109n convert the electric signals into optical signals and output the optical signals to the delay units 110a to 110n. At this time, each received signal is converted into an optical signal with a different frequency for each received signal. Next, the delay unit 110
In a to 110n, the received signal is delayed by a predetermined delay time and output to the O / E units 117a to 117n. At this time, the delay units 110a to 110n are delayed by different delay times. Since the optical fiber cables forming the delay units 110a to 110n have different lengths for the respective delay units 110a to 110n, the loss generated when transmitting the optical fiber cables also differs for each of the delay units 110a to 110n. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length. O / E section 117a-11
7n converts the received signal from an optical signal to an electrical signal and outputs it to the filter units 118a to 118n.

The filter sections 118a to 118n attenuate the frequency domain other than the desired signal domain with respect to the received signal converted into the electric signal and output it to the frequency conversion sections 119a to 119n. The local transmitter 120 generates a local signal of an intermediate frequency and outputs it to the frequency converters 119a to 119n. The frequency conversion units 119a to 119n convert the received signal into a frequency that allows despreading and demodulation, and despreading unit 121.
a to 121n. Despreading units 121a to 121n
Is a demodulation unit 122a-1 after despreading the received signal.
22n. The demodulation units 122a to 122n demodulate the received signal and output it to the decoding units 123a to 123n. The decoding units 123a to 123n decode the received signals and output the decoded signals to the A / D conversion units 124a to 124n. A / D
The converters 124a to 124n convert the received signal from analog to digital and output the converted signal to the synthesizer 125. Synthesis part 1
In 25, the reception signals output from the respective A / D converters 124a to 124n are diversity-combined. This suppresses the effects of fading and interference waves,
A received signal with good characteristics can be obtained.

Next, the case of transmitting from the antenna elements 103a to 103n will be described. The signal to send is D
The A / A converters 126a to 126n convert from digital to analog and output to the encoders 127a to 127n.
Encoding sections 127a to 127n encode the transmission signal and output it to modulating sections 128a to 128n. Modulator 128a
~ 128n is the spreading unit 129a after modulating the transmission signal.
To 129n. The diffusion units 129a to 129n are
After the transmission signal is spread, the frequency converters 130a-1
Output to 30n. The local transmitter 131 generates a local signal of an intermediate frequency and outputs the frequency converters 130a to 130a.
output to n. The frequency conversion units 130a to 130n multiply the modulated and spread transmission signal by a local signal to convert the transmission signal into an intermediate frequency of a frequency different for each transmission signal, and the transmission signal after the frequency conversion is filtered from the filtering unit 132a to 130n.
It outputs to 132n.

Filter units 132a to 132n attenuate the frequency region other than the desired signal region for the frequency-converted transmission signal and output the attenuated frequency region to E / O units 133a to 133n. The E / O units 133a to 133n convert the electric signals into optical signals and output the optical signals to the delay units 111a to 111n. At this time, each transmission signal is converted into an optical signal with a different frequency for each transmission signal. Next, the delay units 111a to 111n
Delays the transmission signal by a predetermined delay time, and the O / E unit 1
12a to 112n. At this time, the delay unit 111
Each of a to 111n is delayed by a different delay time. Since the optical fiber cables forming the delay units 111a to 111n have different lengths for the respective delay units 111a to 111n, the loss caused when transmitting the optical fiber cable also differs for each of the delay units 111a to 111n. Since the loss increases as the length of the optical fiber cable increases, the optical signals of wavelengths with smaller transmission loss are allocated in order from the optical fiber cable with the longer length to the optical fiber cable with the shorter length.

Next, the O / E units 112a to 112n convert the transmission signal from an optical signal to an electrical signal and filter it.
3a to 113n. Filter units 113a to 11
3n attenuates a frequency region other than a desired signal region with respect to a transmission signal converted into an electric signal and then frequency conversion unit 114.
a to 114n. The local oscillator 115 generates a local signal having a frequency difference between the radio frequency and the intermediate frequency and outputs the local signal to the frequency converters 114a to 114n. The frequency conversion units 114a to 114n multiply the transmission signal by the local signal to convert the frequency of the transmission signal into a radio frequency, and output the frequency-converted transmission signal to the amplification units 116a to 116n. The amplification units 116a to 116n amplify the transmission signal and output the amplified transmission signal to the duplexers 104a to 104n, whereby the transmission signal is transmitted from the antenna elements 103a to 103n. In addition, the transmission power value of each transmission signal obtained using the control information signal including the information of the transmission power by the transmission power control unit not shown in the figure is set to the amplification units 116a to 116a.
output to n.

As described above, the wireless device 80 of the present embodiment
0, the delay units 110a to 110n and 111a to 1
Since 11n causes a delay in the optical signal, it can be delayed easily and for a required time. Also, the delay units 110a to 110n and 111a to 111n.
Is formed by winding an optical fiber cable, the delay unit can be formed with a simple structure, the wireless device 800 can be installed at low cost, and the wireless device 800 can be downsized. In addition, the delay units 110a to 110n and 111a to 1
In order to increase the delay time in order to make the optical fiber cable forming 11n spiral, that is, the delay unit 1
Even when the length of the optical fiber cables forming 10a to 110n and 111a to 111n is increased, the delay unit 11
The size of 0a to 110n and 111a to 111n can be reduced.
Further, even when the delay time due to the micro multipath is small, the delay units 110a to 110n delay so as to generate a delay time of one chip time or more, so that the rake method synthesis can be performed, regardless of the environment used. Communication quality can be improved. Further, since the transmission signal and the reception signal are converted into the intermediate frequency to remove the noise, the noise can be sufficiently attenuated.

The number of antenna elements 103a to 103n and the optical fiber cables 801a to 801n, 80
2a to 802n, 803a to 803n, 804a to 80
The number of 4n is not particularly limited, and can be any number. In addition, in this embodiment, the delay units 110a to 11a are used.
0n corresponds to E / O units 109a to 109n and O / E unit 117a.
~ 117n and the delay units 111a to 111n are provided between the E / O units 133a to 133n and the O / E units 112a to 112n, the delay units 110a to 110n and 111 are not necessarily provided.
The number of a to 111n is not limited to one provided in each transmission line, and a plurality of a to 111n can be provided, and the number is arbitrary, and the total delay time of all the delay units becomes the required delay time. By doing so, the same effect can be obtained.

(Other Embodiments) In the above-described first to fifth embodiments, the received signal processing and the transmitted signal processing are performed in the same base station apparatus and the same control station apparatus. However, the effect of the present invention is not necessarily required to be performed in the same device, and the effect of the present invention can be obtained even when the receiving device and the transmitting device are separate devices. In this case, the antenna element needs to be installed separately in the receiving device and the transmitting device. Further, in the above-described first to fifth embodiments, the modulation section and the demodulation section are provided separately, but it is not always necessary to provide them separately, and the effects of the present invention can be obtained even if they are integrated as a modulation / demodulation section that performs both modulation and demodulation. Is obtained. Further, in the above-described first to fifth embodiments, the optical fiber cable is used as the transmission unit, but any medium other than the optical fiber cable can be applied as long as it is a medium capable of transmitting an optical signal. Further, in the above-described first to fifth embodiments, the intermediate frequency signal is converted into the optical signal,
Even if a high frequency signal is converted into an optical signal without being converted into an intermediate frequency, the effect of the present invention can be obtained.

[0115]

As described above, according to the present invention,
Since it causes a delay for the optical signal, it is easy and
It is possible to provide a wireless device that can cause a delay for a required time.

[Brief description of drawings]

FIG. 1 is a diagram showing configurations of a base station apparatus and a control station apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing an example of a frequency distribution of electric power in a transmission signal.

FIG. 3 is a diagram showing an example of an attenuation characteristic of a filter used at a radio frequency and a frequency distribution of power of a transmission signal.

FIG. 4 is a diagram showing an example of attenuation characteristics of a filter used at an intermediate frequency and a frequency distribution of power of a transmission signal.

FIG. 5 is a diagram showing configurations of a base station apparatus and a control station apparatus according to Embodiment 2 of the present invention.

FIG. 6 is a diagram showing configurations of a base station apparatus and a control station apparatus according to Embodiment 3 of the present invention.

FIG. 7 is a diagram showing configurations of a base station apparatus and a control station apparatus according to Embodiment 4 of the present invention.

FIG. 8 is a diagram showing configurations of a base station apparatus and a control station apparatus according to Embodiment 5 of the present invention.

[Explanation of symbols]

100 wireless devices 101 base station device 102 control station device 106a-106n frequency converter 109a-109n E / O section 110a to 110n delay unit 111a-111n delay unit 112a to 112n O / E section 114a to 114n frequency converter 117a-117n O / E part 119a to 119n Frequency converter 125 Synthesis Department 130a-130n frequency converter 133a-133n E / O part 135a-135n Optical fiber cable 136a-136n optical fiber cable

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04Q 7/36 F term (reference) 5K028 BB08 CC02 DD01 DD02 KK01 KK03 5K059 CC03 DD35 EE02 5K067 AA23 CC24 DD57 EE10 EE37 EE59 5K102 AA01 RB01

Claims (18)

[Claims] 1. An electro-optical converting means for converting a plurality of received signals received by a plurality of antennas from an electric signal to an optical signal,
A base station apparatus comprising: a delay section that causes a delay for each received signal converted into an optical signal by the electro-optical conversion section, and a transmission section that transmits the received signal to a control station apparatus. 2. The base station apparatus according to claim 1, wherein a plurality of received signals delayed by the delay means are multiplexed and then are collectively transmitted by the transmission means. 3. The delay means delays the delay time between the reception signals to be 1 chip time or more when the delay time between the reception signals is 1 chip time or less. 1 or the base station device according to claim 2. 4. A delay means for delaying each of a plurality of transmission signals which are optical signals transmitted from the control station device, and a photoelectric device for converting the transmission signal delayed by the delay means from an optical signal to an electric signal. A base station apparatus comprising: a conversion unit and a transmission unit that transmits a transmission signal. 5. A delay unit that causes a delay for each of a plurality of received signals which are optical signals transmitted from a base station device, a photoelectric conversion unit that converts an optical signal into an electric signal, and a plurality of received signals are combined. A control station device comprising: combining means. 6. The delay means delays the delay time between received signals to be 1 chip time or more when the delay time between received signals is 1 chip time or less. 5. The control station device according to item 5. 7. An electro-optical converting means for converting a received signal received by a plurality of antennas from an electric signal into an optical signal, and a delay for causing a delay for each of the plurality of received signals converted into an optical signal by the electro-optical converting means. A radio apparatus comprising: a unit, a photoelectric conversion unit that converts a received signal from an optical signal to an electric signal, and a combining unit that combines a plurality of received signals. 8. The delay means is provided in a base station device, the combining means is provided in a control station device, and a transmission signal is transmitted from the base station device to the control station device by a transmission means. The wireless device according to claim 7. 9. The wireless device according to claim 7, wherein the delay unit and the combining unit are provided in the control station device, and a transmission signal is transmitted from the base station device to the control station device by the transmission unit. apparatus. 10. The radio apparatus according to claim 8, wherein a plurality of received signals are multiplexed and then collectively transmitted by the transmitting means. 11. The delay means delays the delay time between received signals to be 1 chip time or more when the delay time between received signals is 1 chip time or less. The wireless device according to any one of claims 7 to 10. 12. An electro-optical conversion means for converting a plurality of transmission signals from an electric signal into an optical signal, a delay means for causing a delay for each transmission signal, a photoelectric conversion means for converting an optical signal into an electric signal, and a transmission signal. And a transmitting means for transmitting the. 13. The radio apparatus according to claim 12, wherein the delay means is provided in the base station apparatus, and the transmission means transmits a transmission signal from the control station apparatus to the base station apparatus. 14. The radio apparatus according to claim 12, wherein the delay unit is provided in the control station apparatus, and the transmission unit transmits the transmission signal from the control station apparatus to the base station apparatus. 15. The radio apparatus according to claim 14, wherein after multiplexing a plurality of transmission signals, the transmission means collectively transmits the signals. 16. The radio apparatus according to claim 7, wherein the delay unit is formed of an optical fiber cable having a different length for each delay unit. 17. An electro-optical conversion step of converting a received signal received by a plurality of antennas from an electric signal to an optical signal, and a delay step of causing a delay for each received signal converted into an optical signal by the electro-optical conversion step, A transmission step of transmitting a reception signal from the base station apparatus to the control station apparatus; a photoelectric conversion step of converting the reception signal from an optical signal to an electric signal; and a combining step of combining a plurality of reception signals. And a method of receiving a wireless device. 18. An electro-optical conversion step of converting a plurality of transmission signals from an electric signal into an optical signal, a transmission step of transmitting the transmission signals from a control station device to a base station device, and an optical signal converted by the electro-optical conversion step. And a transmission step of transmitting the transmission signal, and a photoelectric conversion step of converting the transmission signal from an optical signal into an electric signal, and a transmission step of transmitting the transmission signal. Method.