JPH11252614A - Communication system, base station device and mobile station device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a follow-up characteristic to the fluctuation of a transmission line by making an upper orientation which is balanced among plural different orientations and whose receiving quality is satisfactory a candidate, sending with a signal part sent in the candidate orientation included in a transmitting signal, selecting the optimum orientation from the signal part and sending information in the optimum orientation to a base station. SOLUTION: A signal arriving at antenna 112 from a base station device is received by an AR part 113, is converted into a low pass frequency to be a mobile station receiving signal and is outputted to a beam candidate receiving level comparator 115. The comparator 115 respectively detects receiving levels of plural pilot beams among inputted mobile station receiving signals and outputs them to an optimum beam selection circuit 116. The circuit 116 selects what is maximum among inputted receiving levels and outputs it as optimum beam information to a modulator 117 and it modulates the optimum beam information and sends and outputs it to a base station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to digital radio communication between a base station apparatus and a mobile station apparatus used for mobile communication and the like. The present invention relates to a communication system, a base station device, and a mobile station device that can be improved.

[0002]

2. Description of the Related Art In radio communication, on the receiving side, in addition to waves arriving from a transmitting station (direct waves), waves arriving after being reflected on a building or the like are superimposed and received. There's a problem. PDC (Personal Dig
ital Cellular) or PHS (Personal Handy-phone Sys)
A mobile phone system typified by tem) includes a sector antenna composed of a plurality of directional antennas having different directional directions, and includes a sector antenna based on a positional relationship between a base station (BS) and a mobile station (MS). By successively switching to an antenna having optimal directivity, the influence of waves arriving after being reflected on a building or the like was minimized to reduce multipath fading.

Specifically, a base station (BS) and a mobile station (M
Uplink communication (MS transmission, BS reception) with S)
In the sector antennas, the characteristics can be improved by using techniques such as antenna selection diversity, which switches from the received signal of each antenna to the antenna that has the optimum (maximum received power) for reception, or combining diversity, which combines the received signals of each antenna at the maximum ratio. it can.

In downlink communication (BS transmission and MS reception), TDD (Time Divisio
n Duplex) method (time multiplex using the same frequency for transmission and reception)
By using the identity of transmission / reception propagation path fluctuations in a short time period, which is a feature of the above, by selecting an antenna in a sector antenna having the maximum uplink received power and performing downlink transmission, quasi-optimal pointing control is achieved. It becomes possible.

However, FDD (Frequency Division Duplex) using different frequencies for uplink and downlink like PDC.
) Method, it is not possible to assume that the transmission and reception propagation path fluctuations are the same, so that the base station (B
A method has been required in which the directivity direction of the transmitting antenna in S) is sequentially scanned, and the mobile station (MS) feeds back the directivity direction at which the received power becomes maximum as information.

Here, a conventional directivity control method using FDD will be described with reference to FIGS. 7 and 8. FIG. FIG.
FIG. 8 is an explanatory diagram illustrating a directivity control method using a conventional FDD, and FIG. 8 is an explanatory diagram illustrating a beam selection process. As shown in FIG. 7, a base station (BS) is a mobile station (M
S) is transmitted at the transmission frequency f1.
Signals to be transmitted are transmission information data and antenna beams 1 to 8 having different transmission directivity characteristics from the base station (BS) as pilot beams, which are sequentially switched for each transmission slot and output. is there. FIG. 8 shows the state of the MS reception power of each beam as the reception power on the vertical axis and the time on the horizontal axis.

[0007] Since the transmission signals of the beams have different transmission directions, they pass through different propagation paths. Therefore, the mobile station (MS) receives the signal of each beam after receiving a different propagation path variation. And mobile station (MS)
Then, the pilot beam in each slot is identified, and the optimum beam number that maximizes the received power is detected. This optimum beam number is incorporated in a part of the upstream transmission information, and the base station (BS)
Send to

[0008] The base station (BS) determines a beam to be used for transmitting transmission information data according to the optimum beam number transmitted from the mobile station (MS). With such control,
The propagation path fluctuation of the BS transmission frequency f1 is detected, and the mobile station (M
The optimum beam that maximizes the reception power in S) can be selected. As a result, a path selection diversity effect can be obtained.

Next, a base station apparatus and a mobile station apparatus used in the conventional directivity control system in the FDD system will be described with reference to FIGS. FIG. 9 is a configuration block diagram of a conventional base station device, and FIG. 10 is a configuration block diagram of a conventional mobile station device. The base station apparatus includes a pilot beam transmission data generator 1 as shown in FIG.
A slot data generator 2, a modulator 3, an RF unit 4,
It comprises an antenna selection controller 5, a beam antenna group 6, a detector 7, and an optimum beam information detector 8.

[0010] Each part of the base station apparatus will be specifically described. The pilot beam transmission data generator 1 generates pilot beam transmission data and outputs it to the generator 2 in slots. The slot data generator 2 receives transmission information data from the outside and pilot beam transmission data from the pilot beam transmission data generator 1, and generates slot data composed of pilot beam transmission data and transmission information data. .

The modulator 3 receives slot data from the slot data generator 2, modulates the modulated data, and converts the modulated signal to RF.
Output to section 4. The RF unit 4 receives a modulation signal from the modulator 3, converts the modulation signal into an RF (Radio Frequency: radio frequency) band signal, and outputs the signal to the beam antenna group 6.

The beam antenna group 6 is an antenna group provided with beam antennas that equally divide the entire 360-degree direction into about eight directions, and the antenna group is controlled by the antenna selection controller 5 to issue an antenna selection instruction. One of the antennas is selected, and the beam generated by the selected antenna is transmitted at the transmission frequency f1 for down transmission.

In uplink reception, an MS transmission signal to be described later is received by a beam antenna group 6 at a reception frequency f 2, an RF section 4 converts the received signal into a low-frequency band, a detector 7 converts the signal into a baseband signal, and The information detector 8 detects the optimum beam information included in the data received from the mobile station (MS) and outputs it to the antenna selection controller 5.

The antenna selection controller 5 selects the antenna in the pilot beam direction in the beam antenna group 6 when outputting the pilot beam portion, and selects the antenna in the optimal beam direction in the beam antenna group 6 when outputting the transmission information data. It controls the beam antenna group 6.

As shown in FIG. 10, the mobile station apparatus includes an antenna 9, an RF unit 10, a detector 11, each beam reception level detector 12, and an optimum beam number detector 1.
3 and a modulator 14.

Each part of the mobile station device will be specifically described. The antenna 9 receives a signal from the base station, and
Numeral 0 detects the reception signal of the reception frequency f1 from the signal received by the antenna 9, and the detector 11 converts the reception signal detected by the RF unit 10 into a low-band frequency and converts it into a mobile station reception signal. Output to the level detector 12.

Each beam reception level detector 12 detects the reception level of a pilot beam included in each slot from the mobile station reception signal converted by the detector 11. Furthermore,
The optimum beam number detector 13 compares the reception levels of the pilot beams in all eight directions, detects the pilot beam having the maximum reception level, determines the pilot beam as the optimum beam, and outputs the beam number to the modulator 14.

The modulator 14 includes an optimum beam number detector 13
, And outputs a modulated signal including the optimum beam number as a part of the transmission information to the RF unit 10.
Then, the RF unit 10 receives the modulated signal from the modulator 14 and converts the modulated signal to a transmission frequency f2 in a high frequency range.
Output to The antenna 9 transmits the signal of the transmission frequency f2 to MS
Transmit as a transmission signal.

As described above, by always directing the beam in the direction in which the reception level at the mobile station apparatus is maximized, it is possible to realize high-quality information transmission following the fluctuation of the propagation path.

Next, an example of a signal format of a BS transmission slot from the base station device will be described with reference to FIGS. FIG. 11 is a diagram illustrating a signal format example of a transmission slot from the base station device, and FIG. 12 is a diagram illustrating another signal format example of a transmission slot from the base station device. In the example shown in FIG.
In this system, the mobile station apparatus scans by embedding the omnidirectional (8 directions) pilot beam of the beam 8. In the example shown in FIG. 12, only one direction of the pilot beam is embedded in one slot. In this method, beam numbers 1 to 8 are sequentially embedded. In both cases, the transmission information includes transmission data transmitted in the beam direction specified by the mobile station (MS).

[0021]

However, the conventional communication method between the base station apparatus and the mobile station apparatus has the following problems. The method of FIG. 11 has the advantage that the optimum beam can be detected within one slot and therefore has excellent follow-up characteristics with respect to fluctuations in the propagation path. There has been a problem that data transmission has resulted in poor information transmission efficiency.

The method of FIG. 12 has an advantage that the transmission interval for a beam occupying one slot can be reduced, so that a decrease in information transmission efficiency can be reduced.
Unless the received power of the pilot beam is detected over the slot, the optimum beam cannot be selected, and there is a problem in that the tracking characteristic to the fluctuation of the transmission path is not good.

The present invention has been made in view of the above circumstances, and provides a communication system, a base station apparatus, and a mobile station apparatus capable of improving the follow-up characteristics with respect to a change in a transmission path while maintaining information transmission efficiency. Aim.

[0024]

According to a first aspect of the present invention, there is provided a communication system, comprising: a plurality of different directing directions; A directivity direction is set as a candidate, a base station apparatus that transmits a signal portion transmitted in the directivity direction of the candidate by incorporating it into a transmission signal, and selects an optimal directivity direction from the signal portion, and transmits the information of the optimal directivity direction to the information. And a mobile station device for transmitting to the base station device.

According to a second aspect of the present invention, there is provided a base station apparatus for averaging the quality of a signal received via a plurality of antennas having different directivities for each direction. From the averaged result, to select a plurality of high-quality candidates from among the plurality of directional directions as candidates, to detect the directional directions of the selected plurality of candidates, and to transmit in each of the directional directions. The transmission is performed by incorporating the signal to be transmitted into the transmission signal.

According to a third aspect of the present invention, there is provided a mobile station apparatus which receives a transmission signal transmitted from a base station apparatus according to the second aspect, and transmits the received signal to the mobile station apparatus. The reception quality is detected for a signal for detecting the orientation directions of a plurality of included candidates, the orientation direction with the best reception quality is selected as the optimal orientation direction, and information indicating the optimal orientation direction is transmitted to the base station apparatus. It is characterized in that it is incorporated in a transmission signal and transmitted.

According to a fourth aspect of the present invention, there is provided a communication system comprising a base station apparatus according to the second aspect and a mobile station apparatus according to the third aspect, wherein The station device obtains information indicating the optimal directivity direction from the signal received from the mobile station device, selects a plurality of candidates in the directivity direction from the received signal, and transmits the plurality of candidates in the transmission signal to the mobile station device. A base for detecting a candidate directional direction, incorporating a signal transmitted in the directional direction, and further transmitting transmission data in the transmission signal in the directional direction according to information indicating the optimal directional direction; It is a station device.

According to a fifth aspect of the present invention, there is provided a base station apparatus comprising a plurality of directional antennas so as to evenly distribute transmission and reception directions on a horizontal plane. A beam antenna element group arranged, an antenna selection controller for specifying a selected antenna by switching and selecting one antenna element from the beam antenna element group, and pilot beam transmission data for generating pilot beam transmission data. A generator, a slot data generator for generating slot configuration data including the pilot beam transmission data and transmission information, a modulator for converting and outputting the slot configuration data to a transmission baseband signal, and the transmission baseband signal. The radio frequency f1
And an RF unit that outputs the signal received at the radio frequency f2 to the selected antenna as a reception baseband signal, and outputs the signal received at the radio frequency f2 to the selected antenna at the radio frequency f2 to each antenna element of the beam antenna element group. Each beam reception level detecting circuit for detecting the level of the obtained signal as each beam reception level, each beam reception level averaging circuit for averaging each beam reception level over time, and outputting each beam average level; A beam candidate selection circuit for selecting a plurality of beam candidates specified in advance in descending order of the reception level from the level and outputting the selected beam candidates as the plurality of beam candidates; and a detection circuit for converting the reception baseband signal into reception bit data. And a selected antenna to be used in a section for transmitting transmission information among the received bit data. An optimal beam information detector for detecting optimal beam information to be transmitted, wherein the antenna selection controller identifies the plurality of beam candidates for each slot in the transmission section of the pilot beam transmission data in the slot configuration data. An antenna selection controller is configured to switch the selected antenna so as to select the antenna and to switch the selected antenna according to the optimum beam information in a transmission section of the information information.

According to a sixth aspect of the present invention, there is provided a mobile station apparatus for receiving a transmission signal from a base station apparatus at a radio frequency f 1, A mobile station antenna for transmitting a transmission signal to the apparatus at a radio frequency f2; a reception signal at a radio frequency f1 output from the mobile station antenna as a reception baseband signal;
An RF unit for converting the received baseband signal into received bit data; and a beam candidate for comparing the reception levels of two beam candidates among the received bit data. A reception level comparator, an optimum beam selection circuit for selecting a beam having a maximum reception level among the reception levels of the two beam candidates, and outputting the selected content as optimum beam information, and modulating the optimum beam information And a modulator that converts the signal into a baseband signal by incorporating it into information and outputs the baseband signal to the RF unit.

According to a seventh aspect of the present invention, there is provided a base station apparatus comprising a plurality of directional antennas in a base station apparatus so as to evenly distribute transmission and reception directions on a horizontal plane. A beam antenna element group arranged, an antenna selection controller for specifying a selected antenna by switching and selecting one antenna element from the beam antenna element group, and pilot beam transmission data for generating pilot beam transmission data. A generator, a slot data generator for generating slot configuration data including the pilot beam transmission data and transmission information, a modulator for converting and outputting the slot configuration data to a transmission baseband signal, and the transmission baseband signal. The radio frequency f1
And an RF unit that outputs the signal received at the radio frequency f2 to the selected antenna as a reception baseband signal, and outputs the signal received at the radio frequency f2 to the selected antenna at the radio frequency f2 to each antenna element of the beam antenna element group. Output while performing switching to sequentially select the selected signal faster than the slot period, and an antenna scan circuit that sequentially outputs information specifying the selected antenna, and a level of a received signal sequentially input from the antenna scan circuit. A reception level detection circuit for detecting as a beam reception level and sequentially outputting in accordance with the information specifying the selected antenna, and time-averaging each beam reception level sequentially input from the reception level detection circuit and outputting each beam average level Each beam reception level averaging circuit, A beam candidate selection circuit that selects a plurality of beam candidates specified in advance in descending order of reception level from the signal and outputs the selected plurality of beam candidates, and a detector that converts the reception baseband signal into reception data. And comprises an optimal beam information detector for detecting optimal beam information for determining a selected antenna to be used in a section for transmitting transmission information among the reception data, wherein the antenna selection controller comprises: An antenna selection controller that switches the selected antenna so as to select each of the plurality of beam candidates for each slot in a transmission section of pilot beam transmission data, and switches the selected antenna according to the optimum beam information in a transmission section of the information information. It is characterized by being.

According to an eighth aspect of the present invention, there is provided a base station apparatus comprising: an omnidirectional antenna element group including a plurality of omnidirectional antennas; An antenna beam selection controller for specifying a beam direction which is a direction of a signal to be transmitted and output through a group of antenna elements, a pilot beam transmission data generator for generating pilot beam transmission data, and the pilot beam transmission A slot data generator for generating slot configuration data including credit data and transmission information; a modulator for converting the slot configuration data into a transmission baseband signal; and an antenna beam selection controller for controlling a beam direction of a signal to be transmitted and output. A transmission baseband that transmits and outputs through each of the omni-directional antennas so as to be directed to the beam direction specified by A Wo coefficient controller for designating a coefficient for adjusting a phase amplitude of a signal, and a transmission baseband signal input from the modulator based on a coefficient input from the Wo coefficient controller. A first phase amplitude adjuster for adjusting the phase amplitude of each of the branched signals; and a transmission baseband signal input from each of the first phase amplitude adjusters is converted into a radio frequency f1,
While outputting to the corresponding omni-directional antenna, a signal arriving at the omni-directional antenna element group at a radio frequency f2 is received by each omni-directional antenna, and each reception baseband signal and the reception baseband signal are received. An RF unit for outputting a combined reception baseband signal; and an antenna beam for outputting information for specifying the selected beam direction while sequentially selecting and specifying a plurality of beam directions specified in advance faster than the slot cycle. A scan circuit and a Wi coefficient designating a coefficient for adjusting a phase amplitude of a received baseband signal output from each of the RF units so that a signal arriving from a beam direction specified by the antenna beam scan circuit can be emphasized and received. A controller and a reception baseband output from the RF unit based on the coefficient specified by the Wi coefficient controller. A second phase and amplitude adjuster for adjusting the phase amplitude of the signal, a combiner for combining and outputting respective signals output from the second phase and amplitude adjuster, and a received signal input from the combiner Level as a beam reception level, and a reception level detection circuit for sequentially outputting according to the information for specifying the selected beam direction, and a time average of each beam reception level sequentially input from the reception level detection circuit, Each beam reception level averaging circuit for outputting an average level, and a plurality of beam candidates specified in advance in descending order of the reception level from the respective beam average levels, and a beam output as the selected plurality of beam candidates A candidate selection circuit, a detector that receives and detects a combined received baseband signal from the RF unit, and outputs the detected signal as received data; An optimum beam information detector for detecting an optimum beam information for determining a beam direction to be used in a section for transmitting transmission information, wherein the antenna beam selection controller controls the pilot beam transmission data among the slot configuration data. In the transmission section, the coefficient of the Wo coefficient controller is controlled so as to be the beam direction of the plurality of beam candidates for each slot, and in the transmission section of the information information, the Wo coefficient is controlled to be the beam direction according to the optimum beam information. It is an antenna beam selection controller for controlling the coefficient of the coefficient controller.

[0032]

Embodiments of the present invention will be described with reference to the drawings. The communication system, the base station apparatus, and the mobile station apparatus according to the embodiment of the present invention generally have different correlations for fading in a short time when frequencies used for transmission and reception are different, but fading the arrival direction of a received signal. By averaging over a longer period,
Focusing on being able to narrow down the candidates for the transmission direction,
The base station apparatus averages the strength of the signal arriving from the mobile station apparatus for each direction of arrival, selects a plurality of candidates, outputs pilot beams by the number of the candidates, and the mobile station apparatus receives the pilot beam. In this case, an appropriate beam is detected and transmitted as information to the base station apparatus, and the base station apparatus specifies a beam direction to be used for transmission output of transmission data based on the information. , While increasing the possibility of using the optimal beam and maintaining transmission quality,
By using a smaller number of pilot beams, it is possible to increase the information transmission efficiency and improve the following characteristics with respect to propagation path fluctuation.

This is because the transmission and reception frequencies are different.
As described above, the transmission / reception propagation path fluctuation cannot be regarded as the same as D. Considering the principle of fading generation, fading occurs by combining a plurality of arriving waves, so that amplitude fluctuations occur due to the phase relationship between the arriving waves. Therefore, it is known that if the transmission and reception wavelengths are different, different phase relationships are synthesized, and the transmission and reception fading has no correlation. But in the longer term,
Since the direction of the arriving radio waves is determined naturally by the surrounding environment, etc., even if the transmission / reception frequency is different, TD
Can be known in the same way as D. Therefore, if the arrival direction of the uplink received signal is viewed at a time interval longer than the fading cycle, candidates in the downlink transmission direction can be narrowed down. That is, it can be said that it is possible to narrow down the average direction of arrival.

Next, a communication system, a base station apparatus and a mobile station apparatus according to an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 1 is a configuration block diagram of a base station device (first base station device) according to an embodiment of the present invention, and FIG. 2 is a configuration block diagram of a mobile station device according to the embodiment of the present invention. FIG. 3 is a configuration block diagram of a base station apparatus (second base station apparatus) according to another embodiment of the present invention, and FIG. 4 is a base station according to another embodiment of the present invention. It is a block diagram of a structure of an apparatus (third base station apparatus),
FIG. 5 is a diagram showing a signal format example of a transmission slot from the base station apparatus according to the embodiment of the present invention.
FIG. 4 is a diagram showing error rate characteristics.

The communication system according to the embodiment of the present invention basically transmits and outputs a pilot beam while switching the directivity direction (beam direction), and outputs information indicating which beam direction is appropriate (optimum beam direction). Information), select an antenna based on the optimum beam information, transmit and output transmission data, and receive a pilot beam transmitted and output by the base station device while switching the beam direction. The mobile station device transmits and outputs optimal beam information as information indicating the direction of the beam.

The configurations of the base station apparatus and the mobile station apparatus will be described respectively. First, the mobile station apparatus according to the embodiment of the present invention, as shown in FIG.
2, an RF unit 113, a detector 114, a beam candidate reception level comparator 115, and an optimum beam selection circuit 116.
And a modulator 117.

Hereinafter, these components will be described in detail.
The RF unit 113 receives the signal of the frequency f1 arriving from the base station apparatus at the antenna 112 and outputs the signal to the detector 114. The RF unit 113 also converts the uplink transmission baseband signal input from the modulator 117 into the frequency f2. The signal is converted into an RF band signal (signal in a radio frequency band) and transmitted and output via the antenna 112.

The detector 114 converts the received signal input from the RF unit 113 into a low-band frequency signal and outputs it to the beam candidate received level comparator 115 as a mobile station received signal.

The beam candidate reception level comparator 115 detects the reception level of each of a plurality of pilot beams from the mobile station reception signal input from the detector 114 and outputs it to the optimum beam selection circuit 116.

The optimum beam selection circuit 116 selects a pilot beam having the maximum reception level from the reception levels input from the beam candidate reception level comparator 115 and outputs the selected pilot beam to the modulator 117 as optimum beam information. is there.

The modulator 117 includes an optimum beam selecting circuit 11
6 receives the optimum beam information and modulates it,
13 is output. The detector 114 outputs an audio signal received from the base station apparatus in addition to the pilot beam, and the modulator 117 modulates an externally input audio signal and outputs the modulated signal to the RF unit 113. However, for simplicity of description, this part is omitted here.

Here, the operation of the mobile station apparatus according to the embodiment of the present invention will be described. The signal arriving at the antenna 112 from the base station apparatus is received by the RF unit 113, subjected to low-frequency conversion by the detector 114, becomes a mobile station reception signal, and is output to the beam candidate reception level comparator 115.

Then, the beam candidate reception level comparator 11
5 detects the reception levels of a plurality of pilot beams among the received mobile station received signals, and outputs them to the optimum beam selection circuit 116.

Then, the optimum beam selecting circuit 116 selects the highest one of the received reception levels, and outputs the optimum beam information to the modulator 117.

Then, the modulator 117 modulates the optimum beam information and outputs the modulated beam information to the RF unit 113.
The signal is converted into a band signal and transmitted and output to the base station device via the antenna 112.

Further, the first base station apparatus according to the embodiment of the present invention uses a plurality of beam antennas directed in each beam direction when switching the beam direction. As shown in FIG. Beam transmission data generator 101, slot data generator 102, modulator 103, RF unit 104, antenna selection controller 10
5, beam antenna group 106, detector 107, optimum beam information detector 108, each beam reception level detection circuit 109, and each beam reception level averaging circuit 110
And a beam selection circuit 111.

Hereinafter, each section of the base station apparatus will be described in detail. The pilot beam transmission data generator 101 generates a predetermined number of data (pilot beam transmission data) used for the pilot beam and outputs the data to the slot data generator 102.

The slot data generator 102 receives the input of the transmission information data and the transmission data for the pilot beam, forms a slot to be described later, and outputs it to the modulator 103 as slot data.

The antenna selection controller 105 controls so as to select a beam antenna in the pilot beam direction when outputting the pilot beam portion and to select a beam antenna in the optimum beam direction when outputting transmission information data.

The modulator 103 includes a slot data generator 1
The modulator modulates the slot data input from 02 and outputs it to the RF unit 104.

The RF section 104 converts a signal input from the modulator 103 into an RF band signal (signal in a radio frequency band) having a frequency f 1, and among a plurality of antennas constituting the beam antenna group 106, will be described later. Then, the transmission signal is transmitted as a downlink transmission signal at a frequency f1 through one antenna designated by the antenna selection controller 105.

Further, the RF unit 104 controls the antenna selection controller 1 among the antennas constituting the beam antenna group 106.
The signal received from the mobile station device at the frequency f2 is received via one antenna designated by the receiver 05 and output to the detector 107 as an uplink received signal.

The antenna selection controller 105 designates a beam direction, and designates one of a plurality of antennas constituting the beam antenna group 106.

Specifically, when the base station apparatus outputs a pilot beam, the antenna selection controller 105
In response to input of a plurality of beam candidates from the beam selection circuit 111, antennas directed in the beam direction indicated by the beam candidates are sequentially designated. Further, when outputting the transmission information data, the antenna selection controller 105 specifies an antenna directed in the beam direction input from the optimum beam information detector 108.

The beam antenna group 106 is a set of directional antennas (beam antennas). If all 360-degree directions are divided into, for example, eight directions, beam antennas having directivity radially at every 40 degrees are formed. It will be arranged.

The detector 107 detects the uplink received signal input from the RF unit 104 and outputs the detected signal to the optimum beam information detector 108 as received data. The signal output from the detector 107 is processed as a received audio signal, but for simplicity, FIG. 1 omits a portion for performing the processing.

The optimum beam information detector 108 is the detector 1
The optimum beam information is detected from the received data input from the unit 07, and the beam direction indicated by the optimum beam information is output to the antenna selection controller 105.

Each beam reception level detection circuit 109 detects the reception level of a signal arriving at a frequency f 2 from the mobile station apparatus at each beam antenna constituting the beam antenna group 106, and outputs a signal to each beam reception level averaging circuit 110. Output.

That is, each beam reception level detection circuit 109
When there are eight beam antennas, the reception levels of signals arriving at these eight beam antennas are detected at the same time and output to each beam reception level averaging circuit 110.

Each beam reception level averaging circuit 110
The reception level of the arriving signal input for each beam antenna is averaged sequentially to calculate each average reception level.

The beam selection circuit 111 outputs a signal for specifying a predetermined number of beam antennas in descending order from the largest one (maximum reception beam) among the average reception levels calculated by each beam reception level averaging circuit 110. It is output to the antenna selection controller 105 as a beam candidate.

That is, when it is specified that two candidates are to be output, the beam selection circuit 111 outputs a signal for specifying the beam direction of the beam antenna having the maximum average reception level and a signal for specifying the next best signal. And a signal specifying the beam direction of the beam antenna to be output as a beam candidate.

Here, the operation of the first base station apparatus will be described. In the following description, it is assumed that two are specified as the number of beam candidates.

First, the slot data generator 102 receives the input of pilot beam transmission data from the pilot beam transmission data generator 101 and the input of transmission information data from the outside, as shown in FIG. A format transmission slot is formed and output to the modulator 103 as slot data.

Then, the modulator 103 modulates the slot data and generates an uplink transmission baseband signal by RF
Then, the RF unit 104 converts the uplink transmission baseband signal into an RF band signal, and transmits and outputs the signal via a beam antenna designated by the antenna selection controller 105.

On the other hand, the frequency f
The signal arriving from the mobile station device at 2 is received by the RF unit 104 and output to the detector 107.

Then, the detector 107 detects the signal input from the RF unit 104 and outputs it as received data, and the optimum beam information detector 108 detects the optimum beam information from the received data and expresses it in the information. The transmission direction is output to the antenna selection controller 105.

Each beam reception level detection circuit 109
Detects the reception level of the signal of frequency f2 arriving from the mobile station apparatus at the beam antenna group 106 for each beam antenna, and each beam reception level averaging circuit 110 averages the detected reception level for each beam antenna. Then, the beam selection circuit 111 outputs to the antenna selection controller 105 the beam directions of two beams (the largest beam and the next best beam) specified in the descending order of the averaged reception level as beam candidates.

Then, at the timing when the RF unit 104 outputs pilot beam transmission data out of the slot data converted into the RF band signal, the antenna selection controller 10
5 sequentially designates the beam antenna having the maximum reception level and the beam antenna having the next best reception level from the beam antenna group 106 in accordance with the plurality of beam candidates input from the beam selection circuit 111, and designates the pilot beam. The transmission data is output via the two designated antennas.

Further, at the timing when the transmission data is output from the slot data converted to the RF band signal by the RF unit 104, the antenna selection controller 105 determines the beam antenna in the transmission direction input from the optimum beam information detector 108. As a result, the transmission data is transmitted and output via the beam antenna.

According to such a first base station apparatus, it is possible to reduce the number of beam candidates compared to the number of antennas while maintaining transmission quality, and to improve information transmission efficiency by using fewer pilot beams. Thus, there is an effect that the follow-up characteristic to the propagation path fluctuation can be enhanced.

Next, a second base station apparatus according to the embodiment of the present invention will be described. In switching the beam direction, the second base station apparatus uses a plurality of beam antennas directed in each beam direction, and uses an antenna scan circuit that sequentially switches and selects a reception signal from each beam antenna. As shown in FIG. 3, a pilot beam transmission data generator 121, a slot data generator 122, a modulator 123, an RF unit 124,
Antenna selection controller 125, beam antenna group 126
, A detector 127, an optimum beam information detector 128,
Antenna switching circuit 130 and antenna scanning circuit 13
1, a reception level detection circuit 132, each beam reception level averaging circuit 133, and a beam selection circuit 134.

The respective units will be specifically described below. The pilot beam transmission data generator 121, the slot data generator 122, the modulator 123, the RF unit 124,
Antenna selection controller 125, beam antenna group 126
, The detector 127 and the optimum beam information detector 128 are respectively a pilot beam transmission data generator 101 and a slot data generator 102 of the first base station apparatus.
, Modulator 103, RF unit 104, antenna selection controller 105, beam antenna group 106, detector 10
7 and the same as the optimal beam information detector 108. Each beam reception level averaging circuit 133 and the beam selection circuit 134 include the respective beam reception level averaging circuits 110 and 110 of the first base station apparatus. Since the configuration is the same as that of the beam selection circuit 111, the description thereof is omitted.

The antenna switching circuit 130 outputs a signal arriving at the designated beam antenna from the antenna scanning circuit 131 to the reception level detection circuit 132.

The antenna scan circuit 131 sequentially and periodically designates each beam antenna constituting the beam antenna group 126, and outputs information indicating which beam antenna is currently designated to the reception level detection circuit 13.
2 is output.

The reception level detection circuit 132 receives a signal input from the antenna switching circuit 130, detects the reception level of the received signal, and
According to information indicating which beam antenna is currently specified, which is input from 31, as a reception level of a signal arriving at the beam antenna indicated by the information,
It is output to each beam reception level averaging circuit 133.

Here, the operation of the second base station apparatus will be described. In the following description, it is assumed that two are specified as the number of beam candidates.

First, the slot data generator 122 receives the input of pilot beam transmission data from the pilot beam transmission data generator 121 and the input of transmission information data from the outside, as shown in FIG. A transmission slot in a format is formed and output to the modulator 123 as slot data.

Then, the modulator 123 modulates the slot data and generates an uplink transmission baseband signal by RF
The RF unit 124 converts the uplink transmission baseband signal into an RF band signal, and outputs the signal via a beam antenna designated by the antenna selection controller 125.

The frequency f is applied to the beam antenna group 126.
The signal arriving from the mobile station device at 2 is received by the RF unit 124 and output to the detector 127.

Then, the detector 127 detects the signal input from the RF unit 124 and outputs it as received data, and the optimum beam information detector 128 detects the optimum beam information from the received data and is represented by the information. Is output to the antenna selection controller 125.

On the other hand, the antenna scanning circuit 131 sequentially and periodically designates each beam antenna, and outputs information indicating which beam antenna is currently designated to the reception level detection circuit 132.

Then, the antenna switching circuit 130 outputs a signal arriving at the beam antenna designated by the antenna scanning circuit 131 to the reception level detection circuit 132, and the reception level detection circuit 132 outputs the signal via the antenna switching circuit 130. Detect the reception level of the input signal,
According to information indicating which beam antenna is currently specified, which is input from the antenna scan circuit 131, as a reception level arriving at the beam antenna,
Output to each beam reception level averaging circuit 133.

That is, the signal arriving at each beam antenna is transmitted to the antenna scan circuit 131 and the antenna switching circuit 1
By the function of the signal 30, the signals are sequentially output to the reception level detection circuit 132 in a time-division manner, and the reception level detection circuit 132 sequentially detects these reception levels and branches as the reception level of the signal arriving at each beam antenna. It outputs to each beam reception level averaging circuit 133.

Then, each beam reception level averaging circuit 1
Reference numeral 33 averages the reception levels detected for each of the beam antennas, and a beam selection circuit 134 selects two (maximum and second best) beams designated in advance in descending order of the averaged reception levels. Is output to the antenna selection controller 125 as a beam candidate.

The antenna selection controller 12 outputs the pilot beam transmission data out of the slot data converted by the RF unit 124 into the RF band signal.
5 sequentially designates the beam antenna having the maximum reception level and the beam antenna having the next best reception level from the beam antenna group 126 according to the plurality of beam candidates input from the beam selection circuit 134, and designates the pilot beam. The transmission data is output via the two designated antennas.

At the timing when the transmission data is output from the slot data converted to the RF band signal by the RF unit 124, the antenna selection controller 125 determines the beam antenna in the transmission direction input from the optimal beam information detector 128. As a result, the transmission data is transmitted and output via the beam antenna.

According to such a second base station apparatus, instead of detecting the intensity of the signal arriving at each beam antenna all at once, the antenna switching circuit 130 and the antenna scan circuit 131 time-divisionally use each beam antenna. Specify the antenna,
The reception level detection circuit 132 detects the reception level of the signal arriving at the designated beam antenna, so that the number of beam candidates can be reduced compared to the number of antennas while maintaining transmission quality. It is possible to increase the information transmission efficiency by using less pilot beams, and to have the effect of improving the follow-up characteristic to the propagation path fluctuation.
There is an effect that the circuit configuration can be simplified.

Further, a third base station apparatus according to the embodiment of the present invention will be described. The third base station apparatus specifies a beam direction using an adaptive array antenna using a plurality of non-directional antennas. As shown in FIG. 4, a pilot beam transmission data generator 141 includes: A slot data generator 142 and a modulator 14
3, the first phase and amplitude adjuster 144, and the RF unit 145.
An omnidirectional antenna group 146 having a plurality of omnidirectional antennas, a detector 147, an optimal beam information detector 148, an antenna beam selection controller 149, a WO coefficient controller 150, and a second Phase amplitude adjuster 151, combiner 152, Wi coefficient controller 153, reception level detection circuit 154, and beam reception level averaging circuit 155
, A beam selection circuit 156, and an antenna beam scan circuit 157.

Hereinafter, each part will be described in detail, but a pilot beam transmission data generator 141, a slot data generator 142, a modulator 143, a detector 147,
Optimal beam information detector 148, antenna beam selection controller 149, reception level detection circuit 154, each beam reception level averaging circuit 155, beam selection circuit 156
And an antenna beam scan circuit 157 respectively include a pilot beam transmission data generator 121, a slot data generator 122, and a modulator 1 of the second base station apparatus.
23, a detector 127, and an optimum beam information detector 128
, The antenna selection controller 125, the reception level detection circuit 132, each beam reception level averaging circuit 133, and the beam selection circuit 134, and a description thereof will be omitted.

In the following description, a first phase / amplitude adjuster 144, an antenna beam selection controller 149,
The Wo coefficient controller 150, the RF unit 145, and the omni-directional antenna group 146 are collectively referred to as a transmission adaptive array antenna, and include the RF unit 145, the omni-directional antenna group 146, and the second phase amplitude adjustment. Unit 151 and synthesizer 1
52 and the Wi coefficient controller 153 together with a receiving adaptive array antenna are collectively referred to as a receiving adaptive array antenna.

Here, the transmitting adaptive array antenna is one that forms a directional beam by adjusting the phase amplitude of a signal to be transmitted and output through each of the plurality of omnidirectional antennas. The adaptive array antenna for reception is a device that receives signals arriving at a plurality of omnidirectional antennas, and combines them while adjusting their phase amplitudes to enable directional reception. is there.

The first phase / amplitude adjuster 144 includes multipliers corresponding to the number of omnidirectional antennas forming the omnidirectional antenna group 146, and includes a Wo coefficient controller 1 described later.
50, the input of the Wo coefficient for each of the multipliers, the multiplier multiplies the modulated signal input from the modulator 143 by the Wo coefficient, and outputs the result to the RF unit 145. .

That is, the first phase / amplitude adjuster 144
The amplitude of the modulated signal transmitted and output from each antenna of the omnidirectional antenna group 146 is adjusted based on the Wo coefficient, whereby the beam direction of the transmission signal is adjusted.

The RF section 145 includes the first phase and amplitude adjuster 1
Each of the multiplied signals input from 44 is converted into an RF band signal, and transmitted and output at the frequency f1 via the corresponding antenna of the omnidirectional antenna group 146.

The RF unit 145 converts a signal arriving at the frequency f 2 via each antenna of the omnidirectional antenna group 146 into a low frequency band, and outputs the low frequency band to the second phase amplitude adjuster 151. Things.

The Wo coefficient controller 150 selects a set of Wo coefficients so as to have directivity in the beam direction input from the antenna beam selection controller 149, and sets the first phase and amplitude controller 144. Is output to

The second phase and amplitude adjuster 151 is provided in the RF section 1
Each of the signals received from the antennas 45 and received via each antenna is multiplied by the corresponding Wi coefficient and output. The combiner 152 adds and combines the results of the multiplications input from the second phase and amplitude adjuster 151 and outputs the result.

That is, the second phase amplitude adjuster 151 and the synthesizer 152 adjust the amplitude of the signal received via each antenna of the omnidirectional antenna group 146 based on the Wi coefficient, and add and synthesize. Thus, a received signal arriving from a specific direction is emphasized, that is, the beam direction of the received signal is adjusted.

The Wi coefficient controller 153 selects a set of Wi coefficients in accordance with the beam direction input from the antenna beam scanning circuit 157 so as to emphasize the received signal in the beam direction, and sets the second phase amplitude. Adjuster 1
51.

Here, the operation of the third base station apparatus will be described assuming that two are specified as the number of beam candidates. First, the slot data generator 142 receives the input of pilot beam transmission data from the pilot beam transmission data generator 141 and receives the input of transmission information data from the outside, and transmits the data in a format as shown in FIG. A slot is formed and output to the modulator 143 as slot data.

Then, modulator 143 modulates the slot data and generates the first transmission as an uplink transmission baseband signal.
Is output to the phase and amplitude adjuster 144. On the other hand, at the timing when the antenna beam selection controller 149 transmits and outputs pilot beam transmission data, the beam direction indicated by the beam candidate input from the beam selection circuit 156 is sequentially designated, and a signal is transmitted in the designated beam direction. Wo coefficient controller 150 outputs a set of Wo coefficients.

Then, the first phase / amplitude adjuster 144
Divide the uplink transmission baseband signal by the number of antennas,
Each is multiplied by the corresponding Wo coefficient and output to the RF unit 145. Then, the RF unit 145 converts the multiplied signal into an RF band signal, and transmits and outputs the signal via the corresponding antenna.

The signal arriving from the mobile station apparatus at the antenna at frequency f 2 is received by RF section 145 and output to detector 147.

The detector 147 detects the signal input from the RF unit 145 and outputs it as received data. The optimum beam information detector 148 detects the optimum beam information from the received data and expresses it in the information. Is output to the antenna beam selection controller 149.

The RF section 145 receives the signals arriving at each antenna, respectively, and
51, while the antenna beam scan circuit 15
7 sequentially and periodically designates each beam direction, and outputs information indicating the currently designated beam direction to the reception level detection circuit 154.

Then, the Wi coefficient controller 153 outputs a set of Wi coefficients so that the signal received from the direction specified by the antenna beam scanning circuit 157 is emphasized, and the second phase and amplitude adjuster 151 outputs the RF coefficient. Each signal input from section 145 is multiplied by the corresponding Wi coefficient and output to combiner 152, and combiner 152 adds and combines these multiplied signals and outputs the resultant signal.

Then, reception level detection circuit 154 detects the reception level of the signal input via combiner 152, and identifies the currently designated beam antenna input from antenna beam scan circuit 157. Is output to each beam reception level averaging circuit 155 as the reception level arriving at the beam antenna in accordance with the information indicating.

That is, the signal arriving from each beam direction is transmitted to the antenna beam scan circuit 157, the Wi coefficient controller 153, the second phase amplitude adjuster 151, and the combiner 1
By the function of 52, the signals are sequentially output to the reception level detection circuit 154 in a time-sharing manner, and the reception level detection circuit 154 sequentially detects these reception levels and branches as the reception level of the signal arriving at each beam antenna. It outputs to each beam reception level averaging circuit 155.

Then, each beam reception level averaging circuit 1
Reference numeral 55 denotes an average of the reception levels detected for each of the beam antennas, and a beam selection circuit 156 selects two (maximum and second best) beams designated in advance in descending order of the averaged reception level. Is output to the antenna beam selection controller 149 as a beam candidate.

At the timing when the RF section 145 outputs pilot beam transmission data out of the slot data converted into the RF band signal, the antenna beam selection controller 149 sets the plurality of beam candidates input from the beam selection circuit 156. , The beam direction having the maximum reception level and the beam direction having the next best reception level among the beam directions are sequentially switched and designated, and the pilot beam transmission data is respectively transmitted to the designated two beam directions. Will be output.

At the timing when the transmission data is output from the slot data converted by the RF unit 145 into the RF band signal, the antenna beam selection controller 149 sets the beam direction of the transmission direction input from the optimum beam information detector 148 at the timing. , And the transmission data is transmitted and output in the beam direction.

Further, in the adaptive array antenna for reception in the third base station apparatus according to the embodiment of the present invention, antenna signal scan circuit 157 sequentially changes the direction of the directivity and designates the signal designated by the Wi coefficient controller. Fifteen
3 and a signal indicating which direction of the directivity is currently specified is received by the reception level detection circuit 154.
Output to

According to such a third base station apparatus, it is possible to reduce the number of beam candidates compared to the number of antennas while maintaining transmission quality, and to improve information transmission efficiency by using fewer pilot beams. In addition, there is an effect that the follow-up characteristic with respect to the propagation path fluctuation can be enhanced, and the beam shape can be arbitrarily set by setting the coefficient Wi so that even if there is a received interference wave, the reception in the arrival direction of the interference wave is possible. Since the so-called null point control can be performed so that the sensitivity becomes 0, there is an effect that the quality of the uplink signal can be further improved.

Next, the operation of the communication system according to the embodiment of the present invention will be described. First, the first to third
The base station apparatus transmits and outputs pilot beam transmission data sequentially in the beam direction of a small number of beam candidates as slot data as shown in FIG. 5, and subsequently downloads the beam direction specified in advance by the mobile station apparatus. The transmission data is transmitted and output.

Then, the mobile station apparatus receives the slot data, detects the beam direction in which the reception intensity of the pilot beam transmission data is maximized, modulates the optimum beam information designating the beam direction, and The output is transmitted together with the transmission data.

Then, the base station device detects the intensity of the signal transmitted and output by the mobile station device coming from each beam direction for each beam direction, averaging them, and arbitrarily arranging an arbitrary number of signals in order from the largest one. A beam candidate is selected, and pilot beam transmission data included in the next slot is sequentially transmitted and output in the beam direction indicated by the beam candidate.

Further, the base station apparatus detects the optimum beam information from the signal received from the mobile station apparatus, and transmits and outputs downlink transmission data in the beam direction indicated by the optimum beam information.

According to the communication system of the embodiment of the present invention, the base station apparatus averages the intensity of the signal received from the mobile station in the direction of each beam direction for each beam direction, and determines a small number of beam candidates. The mobile station device detects and outputs a pilot beam in the beam direction of the beam candidate, and the mobile station device detects the optimal beam direction among the beam directions of the beam candidate and transmits the beam direction to the base station device as optimal beam information. By outputting, it is possible to improve the information transmission efficiency by using a smaller number of pilot beams while maintaining the transmission quality, and to improve the tracking characteristics with respect to the propagation path fluctuation.

[0120]

EXAMPLE A result of a simulation performed on an error rate characteristic (BER) of a communication system according to an embodiment of the present invention will be described with reference to FIG. FIG. 6 is a diagram illustrating an error rate characteristic.

In FIG. 6, the average Eb / No is d on the horizontal axis.
Taking the unit of B, and taking the BER as the vertical axis, the conventional system of 8 slots / frame repetition (8B) and the communication system of the present invention (in the case of 2 slots / frame repetition)
The BER with (2B) is plotted in a semilogarithmic scale.

Here, the modulation scheme is QPSK, the transmission rate is 153.6 Kbps, and the propagation path model is such that the direction of arrival of the base station uplink received wave is independent of ray aging from two directions of 10 ° and 125 °. The maximum Doppler frequency fD is 20 Hz and 4
The case of 0 Hz is simulated.

Also, it is assumed that the incoming direction of the downlink received wave from the mobile station is the same as the uplink, but that the uplink and downlink propagation path fluctuations are completely uncorrelated. For comparison, the theoretical value in the case where Rayleigh fading is present and the theoretical value of selection diversity are plotted together.

As shown in FIG. 6, the communication system of the present invention (in the case of 2 slots / frame repetition) (2B)
Compared with the conventional method (8B), the BER is smaller in the vicinity of the theoretical value of the selection diversity.

When the fluctuation of the propagation path is fast (Eb / No
In most cases, the conventional method (8B) exceeds the theoretical value of Rayleigh fading in both cases where the maximum Doppler frequency fD is 20 Hz and 40 Hz, whereas in the communication system of the present invention, Is lower than the theoretical value of Rayleigh fading, which indicates that the error rate characteristic is improved as a result of the improvement of the tracking characteristic.

[0126]

According to the present invention, a signal transmitted in the directivity direction of a candidate is set as an upper directivity direction having good reception quality, which is averaged from a plurality of different directivity directions by the base station apparatus as a candidate. The mobile station device selects the optimum directivity direction from the signal portion and transmits the information of the optimum directivity direction to the base station device, so that the information transmission efficiency is maintained. In addition, there is an effect that the following characteristic with respect to the fluctuation of the transmission path can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a base station apparatus (first base station apparatus) according to an embodiment of the present invention.

FIG. 2 is a configuration block diagram of a mobile station device according to the embodiment of the present invention.

FIG. 3 is a configuration block diagram of a base station apparatus (second base station apparatus) according to another embodiment of the present invention.

FIG. 4 is a configuration block diagram of a base station device (third base station device) according to another embodiment of the present invention.

FIG. 5 is a diagram showing a signal format example of a transmission slot from the base station apparatus according to the embodiment of the present invention.

FIG. 6 is a diagram illustrating error rate characteristics.

FIG. 7 is an explanatory diagram of a directivity control method using a conventional FDD.

FIG. 8 is an explanatory diagram illustrating a process of beam selection.

FIG. 9 is a configuration block diagram of a conventional base station device.

FIG. 10 is a configuration block diagram of a conventional mobile station device.

FIG. 11 is a diagram illustrating an example of a signal format of a transmission slot from a base station device.

FIG. 12 is a diagram illustrating another signal format example of a transmission slot from the base station device.

[Explanation of symbols]

1, 101, 121, 141 ... data generator for pilot beam transmission, 2, 102, 122, 142 ... slot data generator, 3, 14, 103, 117, 12
3, 143 ... modulator, 4, 10, 104, 113, 1
24, 145: RF unit, 5, 105, 125: Antenna selection controller, 6, 106, 126: Beam antenna group, 7, 11, 114, 127: Detector, 8, 10
8, 128: Optimum beam information detector, 9, 112: Antenna, 12: Each beam reception level detector, 13:
Optimum beam number detector, 109: each beam reception level detector, 110, 133: each beam reception level averaging circuit, 111, 134: beam selection circuit, 115 ...
Beam candidate reception level comparator, 116: optimum beam number selection circuit, 130: antenna switching circuit, 131 ...
Antenna scan circuit, 144, 151 phase and amplitude adjuster, 152 synthesizer, 146 omnidirectional antenna group, 150 Wo1 to Wo8 coefficient controller, 153 Wi1
~ Wi8 coefficient controller

Claims (8)

[Claims] 1. A base for transmitting a signal by transmitting a signal part transmitted in the direction of the candidate as a candidate, the higher direction having good reception quality averaged from a plurality of different directions. A communication system comprising: a station device; and a mobile station device that selects an optimal directivity direction from the signal portion and transmits information on the optimal directivity direction to the base station device. 2. A method for averaging the qualities of signals received via a plurality of antennas having different directivities for each directional direction, and selecting candidates having higher quality from the plurality of directional directions based on the averaged result. A base station device for detecting the direction of the selected plurality of candidates, and incorporating a signal transmitted in each of the directions in a transmission signal and transmitting the signal. 3. A reception signal received from the base station apparatus according to claim 2, and receiving quality of a signal for detecting a plurality of candidate directional directions included in the received signal is detected and received. A mobile station device, wherein a direction of highest quality is selected as an optimal direction, and information indicating the optimal direction is incorporated in a transmission signal to the base station and transmitted. 4. The base station apparatus according to claim 2, and claim 3.
Mobile base station device, the base station device acquires information indicating the optimal directivity direction from a signal received from the mobile station device, and selects a plurality of candidates in the directivity direction from the received signal, A signal for detecting the direction of the plurality of candidates in the transmission signal to the mobile station device, incorporating a signal transmitted in each of the direction, the transmission data in the transmission signal further the optimal direction. A communication system, which is a base station device that transmits in the direction in accordance with the indicated information. 5. A beam antenna element group in which a plurality of directional antennas are arranged so as to equally distribute transmission and reception directivity directions on a horizontal plane, and one antenna element is switched from the beam antenna element group. An antenna selection controller for specifying a selected antenna by selecting; a pilot beam transmission data generator for generating pilot beam transmission data; and generating slot configuration data including the pilot beam transmission data and transmission information. A slot data generator, a modulator that converts and outputs the slot configuration data to a transmission baseband signal, and converts the transmission baseband signal to a radio frequency f1,
An RF unit that outputs to the selected antenna and outputs a signal received at a radio frequency f2 to the selected antenna as a reception baseband signal; and a level of a signal received at a radio frequency f2 to each antenna element of the beam antenna element group. Each beam reception level detecting circuit for detecting the respective beam reception levels, each beam reception level is averaged over time, and each beam reception level averaging circuit that outputs each beam average level; and a reception level from each beam average level. A beam candidate selection circuit that selects a plurality of beam candidates specified in advance in descending order and outputs the selected plurality of beam candidates, and a detector that converts the received baseband signal into received bit data. When determining the selected antenna to be used in the section for transmitting the transmission information in the received bit data, And an optimum beam information detector for detecting beam information, the antenna selection controller is in transmission period of the pilot beam transmission data of the slot configuration data 1
A base station, comprising: an antenna selection controller that switches the selected antenna so as to select each of the plurality of beam candidates for each slot, and switches the selected antenna according to the optimum beam information in a transmission section of the information information. apparatus. 6. A mobile station antenna that receives a transmission signal from the base station apparatus according to claim 5 at a radio frequency f1, and transmits a transmission signal to the base station apparatus at a radio frequency f2. An RF unit for outputting a reception signal of the radio frequency f1 as a reception baseband signal, converting a transmission baseband signal to a radio frequency f2 and outputting the radio baseband signal to the mobile station antenna, and converting the reception baseband signal to reception bit data A beam detector that compares the reception levels of two beam candidates from the received bit data; and selects a beam having the maximum reception level among the reception levels of the two beam candidates. An optimal beam selecting circuit for outputting the selected content as optimal beam information; and incorporating the optimal beam information into the modulation information. And a modulator that converts the signal into a band signal and outputs the signal to the RF unit. 7. A beam antenna element group in which a plurality of directional antennas are arranged so as to evenly distribute transmission and reception directivity directions on a horizontal plane, and one antenna element is switched from the beam antenna element group. An antenna selection controller for specifying a selected antenna by selecting; a pilot beam transmission data generator for generating pilot beam transmission data; and generating slot configuration data including the pilot beam transmission data and transmission information. A slot data generator, a modulator that converts and outputs the slot configuration data to a transmission baseband signal, and converts the transmission baseband signal to a radio frequency f1,
An RF unit that outputs to the selected antenna and outputs a signal received at the radio frequency f2 to the selected antenna as a reception baseband signal; and a slot that receives a signal received at the radio frequency f2 to each antenna element of the beam antenna element group. An antenna scan circuit that sequentially outputs information specifying the selected antenna while performing switching while sequentially performing selection faster than the cycle, and a level of a received signal sequentially input from the antenna scan circuit as a beam reception level. A reception level detection circuit for detecting and sequentially outputting in accordance with information specifying the selected antenna; and a beam reception circuit for time-averaging each beam reception level sequentially input from the reception level detection circuit and outputting each beam average level A level averaging circuit, and from each of the beam average levels A beam candidate selection circuit that selects a plurality of beam candidates specified in advance in descending order of the signal level and outputs the selected plurality of beam candidates, and a detector that converts the received baseband signal into received data. An optimal beam information detector for detecting optimal beam information for determining a selected antenna to be used in a section for transmitting transmission information in the reception data, wherein the antenna selection controller is configured to control the pilot beam in the slot configuration data. 1 in the transmission section of transmission data
A base station, comprising: an antenna selection controller that switches the selected antenna so as to select each of the plurality of beam candidates for each slot, and switches the selected antenna according to the optimum beam information in a transmission section of the information information. apparatus. 8. An omnidirectional antenna element group formed by arranging a plurality of omnidirectional antennas, and a beam direction which is a directivity direction of a signal transmitted and output through the omnidirectional antenna element group is specified. An antenna beam selection controller; a pilot beam transmission data generator for generating pilot beam transmission data; a slot data generator for generating slot configuration data including the pilot beam transmission data and transmission information; and the slot. A modulator for converting configuration data into a transmission baseband signal; and a transmission output through each of the omni-directional antennas so that a beam direction of a signal to be transmitted and output is directed to a beam direction specified by the antenna beam selection controller. Wo coefficient controller for specifying a coefficient for adjusting a phase amplitude of a transmission baseband signal to be transmitted; A first phase amplitude adjuster that splits a transmission baseband signal input from the modulator into the number of the omnidirectional antennas based on a coefficient input from the modulator, and adjusts a phase amplitude of each split signal. The transmission baseband signal input from each of the first phase and amplitude adjusters is converted into a radio frequency f1 and output to the corresponding omnidirectional antenna, and the omnidirectional antenna element group is transmitted to the omnidirectional antenna element group at radio frequency f2 An RF unit that receives an incoming signal with each omni-directional antenna, and outputs each received baseband signal and a combined received baseband signal obtained by combining the received baseband signals; and a plurality of beam directions specified in advance. An antenna beam scan circuit that outputs information for specifying the selected beam direction while sequentially selecting and specifying the beam speed faster than the slot cycle; The RF to be able to receive emphasizes the signals coming from the beam direction turbocharger down circuit to identify
A Wi coefficient controller that specifies a coefficient for adjusting the phase amplitude of the received baseband signal output from each of the receiving units; and a reception base that is output from the RF unit based on the coefficient specified by the Wi coefficient controller. A second phase amplitude adjuster that adjusts the phase amplitude of the band signal; a synthesizer that synthesizes and outputs each signal output by the second phase amplitude adjuster; A reception level detection circuit that detects a signal level as a beam reception level and sequentially outputs the selected beam direction according to the information specifying the selected beam direction; and time-averages each beam reception level sequentially input from the reception level detection circuit. A beam reception level averaging circuit for outputting a beam average level; and a plurality of beams specified in advance in descending order of the reception level from the beam average level. A beam candidate selection circuit that selects a complement and outputs the selected plurality of beam candidates, a detector that inputs and detects a combined reception baseband signal from the RF unit, and outputs the received data as reception data; An optimal beam information detector for detecting optimal beam information for determining a beam direction to be used in a section for transmitting transmission information, wherein the antenna beam selection controller is configured to transmit the pilot beam transmission data among the slot configuration data. In the transmission section, the coefficient of the Wo coefficient controller is controlled so as to be the beam direction of the plurality of beam candidates for each slot, and in the transmission section of the information information, the Wo coefficient is controlled to be the beam direction according to the optimum beam information. A base station apparatus, which is an antenna beam selection controller that controls a coefficient of a coefficient controller.