JP2003174431A - Radio communication equipment and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove a signal transmitted from a base station device, to which its own station is not belonging, as interfering component. <P>SOLUTION: A delay profile preparing part 103 prepares a delay profile corresponding to a radio signal transmitted from a base station device to which its own station is belonging, and outputs the delay profile and a diffuse code to be used for communication between its own station and the base station device to a JD demodulating part 105. Each of delay profile preparing parts 104a-104n prepares a delay profile corresponding to a radio signal transmitted from a base station device to which its own station is not belonging, and outputs the delay profile and a diffuse code to be used for the signal transmitted by the base station device to which its own station is not belonging to the JD demodulating part 105. The JD demodulating part 105 performs a joint detection arithmetic operation to a reception signal by using the replica of the delay profile and the diffuse code, and outputs the obtained reception signal to a decoding part 106. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device and a wireless communication method, and more particularly to TD-CDMA (Time Divisi).
The present invention relates to a wireless communication device and a wireless communication method suitable for use in on-code division multiple access.

[0002]

2. Description of the Related Art Conventionally, as a method of removing various interferences such as interference due to multipath fading, intersymbol interference, and multiple access interference and extracting a demodulated signal, a joint detection (hereinafter referred to as "JD") is performed. There is an interference signal removal method using. This JD
For more information on “Zero Forcing and Minimum Mean-Squ
are-Error Equalization for Multiuser Detection
in Code -DivisionMultiple-Access Channels ”
(Klein A., Kaleh G. K., Baier P. W., IEEE
Trans. Vehicular Technology, Vol. 45, pp
． 276-287, 1996. ).

For example, TD-CDMA (Time Divisio)
In the n-Code Division Multiple Access (time division code division multiple access) system, one frame has a plurality of frames (for example, 15 frames).
Number of timeslots, and each user has a DPCH (DeDe) for one or more timeslots in each frame.
Signals are transmitted using dedicated physical channels. One or more of the time slots in one frame are downlink P-
CCPCH (Primary-Common Control Physical Channe
l: first common control physical channel). P
-CCPCH is a channel used for transmitting downlink notification information. Hereinafter, the description will be limited to downlink reception.

A known reference signal called a midamble code is inserted between the data parts of the DPCH and P-CCPCH signals. The midamble code is used for channel estimation for each user signal.

A radio communication apparatus using the TD-CDMA and the midamble code will be described. FIG. 26 shows
It is a block diagram which shows an example of a structure of the conventional wireless communication apparatus.

Midamble replica code generator 11
Creates a replica of the midamble code of its own cell and outputs it to the midamble correlation unit 12. Here, the own cell indicates a range in which the own cell can communicate with the base station device to which the own cell belongs. The midamble code of the own cell is an area in which the base station device to which the own station belongs covers communication, and indicates a midamble code used when the base station device and the own station communicate with each other.

The midamble correlation section 12 multiplies the midamble section of the received signal by the midamble code of its own cell to create a delay profile showing the correlation between the received signal and the midamble code, and outputs it to the path determination section 13. To do. When JD is used as the demodulation method, it is necessary to provide delay profiles for all users, including not only the user but also other users, which are multiplexed in the received signal. The midamble code used in each channel is a basic code circulated in delay window width units. Therefore, the midamble correlation unit 12 creates a plurality of delay profiles by shifting the timing of multiplying the received signal and the midamble code for each delay window width unit, and outputs the plurality of delay profiles to the path determination unit 13. .

The path determination unit 13 outputs to the midamble shift determination unit 14 a channel estimation value obtained by selecting only valid paths from the delay profile output from the midamble correlation unit 12. The midamble shift determination unit 14 determines whether or not all input delay profiles are actually multiplexed midamble codes.

The spreading code determining unit 15 determines all channelization codes actually used in communication by the base station device of the own cell, and scrambles the channelization code determined to be used and the own cell. A spreading code is generated from the code and output to the JD demodulation unit 17. The delay unit 16 delays the received signal until the processing timing of the JD demodulation unit 17.

The JD demodulation unit 17 performs joint detection calculation on the received signal using the delay profile and the replica of the spreading code. Specifically, the JD demodulation unit 17
Is a convolution product of a delay profile and a spread code replica to create a system matrix, and the received signal is multiplied by the system matrix to obtain a demodulated received signal.

As described above, in the conventional wireless communication apparatus, signals other than those directed to the own station are removed as interference components by using joint detection calculation or the like. However, there are interference components that cannot be removed by conventional wireless communication devices.

FIG. 27 is a diagram showing an example of communication between the base station apparatus and the communication terminal apparatus. In FIG. 27, the communication terminal device 23 in the cell 22 to which the base station device belongs is the cell 22
The case where the cell exists near the cell edge of is described.

The base station device 21 is replaced with another communication terminal device 24.
When the signal is transmitted to the base station device 21, the base station device 21 and the communication terminal device 24 are close to each other, so that the base station device 21 can transmit the signal with weak transmission power to perform communication. The signal for the communication terminal device 24 becomes a weak interference signal with respect to the communication terminal device 23.

The base station device 31 in the cell 32 adjacent to the cell 22 communicates with the communication terminal device 33 existing in the cell 32. When the communication terminal device 33 exists at the cell edge of the cell 32, the base station device 31 transmits a signal with strong transmission power in consideration of signal attenuation.

When the communication terminal device 23 exists in the area where the cell 22 and the cell 32 overlap, the signal transmitted from the base station device 31 to the communication terminal device 33 is the communication terminal device 23.
It becomes a strong interference signal to.

Further, when the base station device transmits a signal by using a directional antenna, the problem that the communication signal of the adjacent cell becomes an interference component appears similarly. FIG. 28 is a diagram illustrating an example of communication between the base station device and the communication terminal device. The base station device 41 transmits signals to the communication terminal devices 43 and 44 in the cell 42 with directivity 45.

When the base station device 41 transmits a signal to the communication terminal device 44, the base station device 41 and the communication terminal device 44.
Since the distance is short, the base station device 41 can perform communication by transmitting a signal with weak transmission power. The signal for the communication terminal device 44 is a weak interference signal for the communication terminal device 43.

The base station device 51 of the cell 52 adjacent to the cell 42 is the communication terminal device 53 belonging to the cell 52.
Communicate with. The base station device 51 transmits a signal with the directivity 55 in the direction in which the communication terminal device 53 exists.

Here, when the communication terminal device 43 exists on the extension of the direction 55 of the directivity for transmitting the signal from the base station device 51, the signal transmitted from the base station device 51 to the communication terminal device 53 is communicated. It becomes a strong interference signal for the terminal device 53.

[0020]

As described above, in the conventional apparatus, the signal transmitted from the base station apparatus to which the own station does not belong is used as an interference component by the interference removing method using the joint detection operation or the like. There is a problem that it cannot be removed.

The present invention has been made in view of the above points, and provides a wireless communication apparatus and a wireless communication method capable of removing a signal transmitted from a base station apparatus to which the own station does not belong as an interference component. The purpose is to

[0022]

A wireless communication apparatus according to the present invention comprises an own cell correlation means for creating a delay profile of a wireless signal transmitted from a base station apparatus to which the own station belongs, and a base station apparatus to which the own station does not belong. Other cell correlation means for creating a delay profile of the radio signal transmitted from, a joint detection operation using the delay profile created in the own cell correlation means and the delay profile created in the other cell correlation means. And a joint detection calculation means for removing an interference component of the received and received radio signal.

The radio communication apparatus of the present invention comprises a cell parameter acquisition means for acquiring from the demodulation result of the received signal the identification information of the midamble code and the spreading code used for the radio signal transmitted from the base station to which the own station does not belong. A cell parameter distribution unit that distributes the identification information of the midamble code and the spreading code, and a spreading replica code generation unit that generates a spreading replica code corresponding to the identification information of the spreading code distributed from the cell parameter distribution unit. , And the other cell correlation means is a midamble replica code generation means for generating the midamble replica code corresponding to the identification information of the midamble code distributed from the cell parameter distribution means,
Midamble correlation means for creating a delay profile from the correlation between the midamble replica code and the received signal.

According to these configurations, the delay profile of the radio signal transmitted from the base station apparatus to which the own station does not belong is created, and the joint detection operation is performed by including this delay profile, thereby A signal transmitted from a base station device that does not belong can be removed as an interference component, and reception performance can be improved.

The wireless communication apparatus of the present invention comprises path extracting means for extracting a predetermined number of paths from the delay profile, and the joint detection calculating means uses the paths extracted by the path extracting means for joint detection. Adopt a configuration that performs a calculation operation.

According to this configuration, the power values of the received signals are compared on a cell-by-cell basis, and the signal transmitted from the cell having a high power value is removed as an interference component, whereby midamble replica code generation, delay profile generation, It is possible to reduce the processing required for path determination, midamble shift determination, spreading code determination, and spreading replica code creation, and reduce the amount of calculation processing of the wireless communication device.

The wireless communication apparatus of the present invention comprises a path extracting means for extracting a path that gives a predetermined amount of interference or more to a desired signal from the delay profile, and the joint detection calculating means is the path extracting means. A configuration for performing joint detection calculation using the extracted path is adopted.

According to this configuration, the signal levels of the paths are compared with each other, and only the path having a high signal level is removed as an interference component, thereby reducing the processing required for the spreading code determination and the spreading replica code creation. Therefore, the calculation processing amount of the wireless communication device can be reduced.

The wireless communication apparatus of the present invention comprises received power measuring means for measuring the received power value of a wireless signal transmitted from a plurality of base station apparatuses to which the own station does not belong, and the base station in descending order of the received power value. Cell selection means for selecting a predetermined number of base station devices from the device as a base station device that transmits a radio signal targeted for removal, and the other cell correlation means is a base selected by the cell selection device. The configuration is such that a delay profile of a radio signal transmitted from the station device is created.

According to this configuration, the power values of the received signals are compared on a cell-by-cell basis, and the signal transmitted from the cell with a high power value is removed as an interference component, whereby midamble replica code generation, delay profile generation, It is possible to reduce the processing required for path determination, midamble shift determination, spreading code determination, and spreading replica code creation, and reduce the amount of calculation processing of the wireless communication device.

The wireless communication device of the present invention measures its own received power value of the radio signal transmitted from the base station device to which the own station belongs, and outputs it as its own cell received power value, and its own cell received power measuring means. Other cell reception power measuring means for measuring the reception power value of a radio signal transmitted from a plurality of base station devices not belonging to and outputting it as another cell reception power value, the own cell reception power value and the other cell reception power When the received power comparison means for comparing values and the own cell received power value is equal to or more than the other cell received power value, the other cell correlation means is instructed to stop, and the own cell received power value is received by the other cell. If it is less than the power value, a control means for instructing the operation of the other cell correlation means is provided.

According to this configuration, the received power values of the signals transmitted from the respective base station devices are compared, and from this comparison result, the signal transmitted from the base station device to which the own station does not belong is regarded as an interference component and joint detection is performed. By determining whether or not to calculate, it is possible to perform processing such as delay profile creation only for the amount necessary for interference removal, and it is possible to reduce the amount of calculation and power consumption.

The radio communication apparatus of the present invention comprises signaling acquisition means for extracting from the received signal other cell information including multiplexing information at the time of transmission in the base station apparatus to which the own station does not belong, and the other cell correlation means is , The channelization code is identified based on the other cell information, and the joint detection calculation means performs the joint detection calculation using the channelization code identified by the other cell correlation means.

In the wireless communication device of the present invention, other cell information is
The configuration is the maximum number of midamble shifts.

In the wireless communication device of the present invention, other cell information is
A structure that is information indicating the identification of the midamble allocation mode is adopted.

In the radio communication apparatus of the present invention, the other cell correlation means identifies the midamble code based on the other cell information, and the joint detection calculation means identifies the midamble code identified by the other cell correlation means. Adopt a configuration for performing joint detection calculation using the above.

According to these configurations, in the control station apparatus, the multiplexing information at the time of transmission in the base station apparatus to which the wireless communication apparatus does not belong is transmitted through the base station apparatus, and the multiplexing information is transmitted in the wireless communication apparatus. By specifying the interference component by using the coding information and removing it from the received signal, it is possible to perform the joint detection calculation and improve the reception performance without having to estimate the multiplexing information.

The radio communication apparatus of the present invention measures the reception power of another cell for each channel of the reception power of the radio signal transmitted from the base station apparatus to which the own station does not belong, and the reception power measured for each channel. And a transmitting means for transmitting the value by a radio signal.

According to this configuration, in order to remove a signal having a large interference in the wireless communication device, the reception levels of the signals transmitted from the base station device to which the own station does not belong are compared, and the signal having a large reception level is transmitted. By removing the signal transmitted from the base station apparatus as an interference component from the received signal, it is possible to remove a signal with large interference with a small amount of processing and improve the reception performance.

Further, according to this configuration, the control station device determines the base station device that has transmitted the signal having a large reception level, and therefore the wireless communication device does not need to make the determination, and the configuration of the wireless communication device is configured. Can be simplified and power consumption can be reduced.

The radio communication apparatus of the present invention comprises another cell reception power measuring means for measuring the reception power of the radio signal transmitted from the base station apparatus to which the own station does not belong, and the reception power measured for each channel. A configuration is provided that includes a transmitting unit that selects a predetermined number of base station apparatuses to which the own station does not belong in descending order of value and transmits a request for other cell information of the base station apparatus by radio signals.

According to this configuration, in order to remove a signal having a large interference in the wireless communication device, the reception levels of the signals transmitted from the base station device to which the own station does not belong are compared, and the signal having a large reception level is transmitted. By removing the signal transmitted from the base station apparatus as an interference component from the received signal, it is possible to remove a signal with large interference with a small amount of processing and improve the reception performance.

The radio communication apparatus of the present invention comprises adjusting means for adjusting the code used for joint detection calculation and the channel estimation value to the same time width in each channel,
The joint detection calculation means employs a configuration for performing joint detection calculation using the code and the channel estimation value adjusted by the adjustment means.

According to this configuration, the code used for the joint detection calculation and the channel estimation value are adjusted to have the same time width in each channel, so that the signals transmitted by the midamble codes having different multiplicities are received. Even in this case, the joint detection calculation can be performed, and the signal transmitted from the base station apparatus to which the own station does not belong can be removed as an interference component, and the reception performance can be improved.

The control station apparatus of the present invention comprises cell information storage means for storing other cell information including multiplexing information at the time of transmission in a plurality of base station apparatuses, and transmission means for transmitting the other cell information. Adopt a configuration that has.

According to this configuration, in the control station device,
The multiplexing information at the time of transmission in the base station device to which the wireless communication device does not belong is transmitted through the base station device, and the wireless communication device uses this multiplexing information to identify the interference component and remove it from the received signal. As a result, it is possible to perform joint detection calculation and improve reception performance without having to estimate the multiplexed information.

The control station apparatus of the present invention comprises a receiving means for receiving a request for other cell information and a selecting means for taking out the requested other cell information from the cell information storage means, and the transmitting means is a requester. The other cell information is transmitted.

According to this configuration, in order to remove a signal having a large interference in the wireless communication device, the reception levels of the signals transmitted from the base station device to which the own station does not belong are compared, and the signal having a large reception level is transmitted. By removing the signal transmitted from the base station apparatus as an interference component from the received signal, it is possible to remove a signal with large interference with a small amount of processing and improve the reception performance.

The control station apparatus of the present invention selects a predetermined number of base station apparatuses in the descending order of the receiving means for receiving a signal including the measured received power value for each channel and the measured received power value for each channel. Selecting means and selecting means for taking out the selected other cell information from the cell information storage means, and the transmitting means has a configuration for transmitting the selected other cell information.

According to this configuration, in order to remove a signal having a large interference in the wireless communication device, the reception levels of the signals transmitted from the base station device to which the own station does not belong are compared, and the signal having a large reception level is transmitted. By removing the signal transmitted from the base station apparatus as an interference component from the received signal, it is possible to remove a signal with large interference with a small amount of processing and improve the reception performance.

Further, according to this configuration, the control station device determines the base station device that has transmitted a signal having a large reception level, and therefore the wireless communication device does not need to make the determination, and the configuration of the wireless communication device is eliminated. Can be simplified and power consumption can be reduced.

The base station apparatus of the present invention comprises a receiving means for receiving other cell information including multiplexing information at the time of transmission by a plurality of base station apparatuses, and a wireless transmitting means for transmitting the other cell information by a radio signal. , Is adopted.

According to this configuration, in the control station device,
The multiplexing information at the time of transmission in the base station device to which the wireless communication device does not belong is transmitted through the base station device, and the wireless communication device uses this multiplexing information to identify the interference component and remove it from the received signal. As a result, it is possible to perform joint detection calculation and improve reception performance without having to estimate the multiplexed information.

The base station apparatus of the present invention has a configuration including a radio receiving means for receiving a radio signal including a request for other cell information and a transmitting means for transmitting the request for other cell information.

According to this configuration, in order to remove a signal having a large interference in the wireless communication device, the reception levels of the signals transmitted from the base station device to which the own station does not belong are compared, and the signal having a large reception level is transmitted. By removing the signal transmitted from the base station apparatus as an interference component from the received signal, it is possible to remove a signal with large interference with a small amount of processing and improve the reception performance.

The base station apparatus of the present invention comprises radio receiving means for receiving a radio signal including the measured received power value for each channel, and transmitting means for transmitting a signal including the received power value. Take the composition.

According to this configuration, in order to remove a signal having a large interference in the wireless communication device, the reception levels of the signals transmitted from the base station device to which the own station does not belong are compared, and the signal having a large reception level is transmitted. By removing the signal transmitted from the base station apparatus as an interference component from the received signal, it is possible to remove a signal with large interference with a small amount of processing and improve the reception performance.

According to this structure, the base station device that has transmitted a signal having a large reception level is judged by the control station device, so that it is not necessary for the wireless communication device to make the judgment, and the structure of the wireless communication device is improved. Can be simplified and power consumption can be reduced.

The wireless communication method of the present invention includes a self-cell correlation process for creating a delay profile of a wireless signal transmitted from a base station device to which the local station belongs, and a wireless signal transmitted from a base station device to which the local station does not belong. Other cell correlation process to create a delay profile of, the delay profile created in the own cell correlation process and the delay profile created in the other cell correlation process using the joint detection operation of the received radio signal And a joint detection calculation step for removing an interference component.

According to this method, the delay profile of the radio signal transmitted from the base station apparatus to which the own station does not belong is created, and the joint detection operation is performed by including this delay profile, whereby the own station belongs. It is possible to improve the normal reception by removing the signal transmitted from the base station device that is not installed as an interference component.

[0061]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventor focuses on the fact that in the interference cancellation of a radio signal using joint detection calculation, only the signal transmitted from the base station device to which the own station belongs is removed as an interference component. Then, the inventors have found that the demodulation result is improved by removing the signal transmitted from the base station apparatus to which the own station does not belong as an interference component, and have completed the present invention.

That is, the gist of the present invention is to create a delay profile of a radio signal transmitted from a base station apparatus to which the own station does not belong, perform joint detection calculation including this delay profile, and obtain a desired received signal. Is to improve the reception performance by removing the interference component.

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

(Embodiment 1) In this embodiment, TD
An example of a communication terminal device that receives a signal transmitted from a base station device in CDMA communication will be described.

FIG. 1 is a block diagram showing the configuration of the radio communication apparatus according to Embodiment 1 of the present invention. The wireless communication device 100 of FIG. 1 includes a wireless unit 101, a delay unit 102, a delay profile creation unit 103, n delay profile creation units 104a to 104n, a JD demodulation unit 105, and
Decoding section 106, cell parameter acquisition section 107, cell parameter storage section 108, and parameter conversion section 109
And other cell parameter distribution unit 110. Here, n is the number of base stations (or cells in which the base station covers communication) that transmits a signal that becomes an interference component with respect to a desired signal among signals transmitted from a base station to which the local station does not belong. Show. For example, it is the number of base station devices in cells adjacent to the cell of the base station device to which the own station belongs.

Delay profile creating section 103 is mainly composed of a midamble replica code generating section 111, a midamble correlating section 112, a path determining section 113, a midamble shift determining section 114, and a code determining section 115. , Create a delay profile for all users to the radio signal transmitted from the base station device to which the own station belongs, and this delay profile and all spreading codes used by the base station device to which the own station belongs for communication. Is output to the JD demodulation unit 105.

Also, the delay profile creating section 104a
Is a midamble replica code generator 121a,
Midamble correlation section 122a and path determination section 123a
And a midamble shift determination unit 124a and a code determination unit 125a, which are delays for all users belonging to the base station device with respect to a radio signal transmitted from a base station device to which the own station does not belong. A profile is created, and this delay profile and spreading codes for all users belonging to the base station apparatus are output to the JD demodulation unit 105.

Similarly, the delay profile creating section 104b
To 104n are the midamble replica code generation units 121b to 121n and the midamble correlation unit 1 respectively.
22b to 122n and path determination units 123b to 123n.
And midamble shift determination units 124b to 124n
And the code determination units 125b to 125n, and creates delay profiles for all users belonging to the base station device for radio signals transmitted from the base station device to which the local station does not belong. The delay profile and the spreading codes of all the users belonging to the base station device are set to J
Output to the D demodulation unit 105.

Radio section 101 receives a radio signal, amplifies the received radio signal, frequency-converts the obtained baseband received signal, delay section 102, midamble correlation section 112, and midamble correlation. Parts 122a-12
Output to 2n. The delay unit 102 delays the received signal until the processing timings of the code determination units 115 and the code determination units 125a to 125n and delays the code determination units 125a to 125n.
To the JD demodulation unit 105 after delaying the processing timing of the JD demodulation unit 105.

Midamble replica code generator 11
1 creates a replica of the midamble basic code from the known midamble basic code of the own cell and outputs the replica to the midamble correlation unit 112. Here, the own cell indicates a range in which the own cell can communicate with the base station device to which the own cell belongs. The midamble basic code of the own cell is an area in which the base station device to which the own station belongs covers communication, and indicates a midamble basic code used when the base station device and the own station communicate with each other.

The midamble correlator 112 multiplies the midamble part of the received signal by the midamble replica code of its own cell to create a delay profile showing the correlation between the midamble part of the received signal and the midamble replica code, It outputs to the path determination unit 113. The midamble replica code used in each channel is a basic code circulated in delay window width units. Specifically, the midamble correlation unit 112 creates a plurality of delay profiles by shifting the timing of multiplying the received signal and the midamble code for each delay window width unit,
The delay profiles are output to the path determination unit 113.

Path determining section 113 outputs a channel estimation value obtained by selecting only valid paths from the delay profile output from midamble correlating section 112, to midamble shift determining section 114.

The midamble shift decision section 114 decides whether or not all the input delay profiles are midamble codes that are actually multiplexed.
Specifically, the midamble shift determination unit 114 is different when using a midamble code common to all users and when using a midamble code for each spreading code.

In the former case, the midamble shift determination section 114 determines the midamble shift used is 1
Select only one. As a selection method, for example, the path of the maximum power is compared from the channel estimation value for the delay profile of each midamble shift, and it is determined that the midamble shift having the largest power is actually used.

On the other hand, in the latter case, the midamble shift determination unit 114 selects the path with the maximum power from the delay profile obtained by multiplying all the midamble shifts used in the own cell, and determines the maximum power, for example. Is set as a reference, and it is determined that a midamble shift having a path whose power is equal to or higher than the threshold actually exists.

The code judging section 115 judges the channelization code used by the base station apparatus to which the own station belongs for communication, and generates from the channelization code judged to be used and the scrambling code of the own cell. The spread code to be output is output to the JD demodulation unit 105.

Specifically, the code determining section 115 differs between when the midamble code common to all users is used and when the midamble code dedicated to each spreading code is used.

In the former case, the code deciding unit 115 generates the spreading code from the scrambling code of the own cell for all the channelization codes because the midamble shift corresponds to the number K of used channelization codes. Then, after performing despreading and RAKE combining processing over a predetermined number of symbols using all kinds of spreading codes, the RAKE output power is compared between the spreading codes, and the upper K spreading codes are actually multiplexed. It is determined that there is.

On the other hand, in the latter case, the code judging section 115
Since the midamble shift and the type of the used channelization code correspond to each other, the midamble shift determination unit 114 selects the channelization code corresponding to the midamble shift determined to be actually used, A spreading code is generated from the scrambling code and channelization code of the own cell.

Midamble replica code generator 12
1a to 121n create a replica of the midamble basic code from the midamble basic code of the other cell output from the other cell parameter distribution unit 110, and output the replicas to the midamble correlation units 122a to 122n, respectively. Here, the other cell indicates a communicable range with a base station device to which the own cell does not belong. Then, the midamble basic code of another cell indicates a midamble basic code used when a base station device to which the own station does not communicate.

Midamble correlation sections 122a to 122n
Multiplies the midamble part of the received signal by the midamble replica code of another cell to create a delay profile showing the correlation between the midamble part of the received signal and the midamble replica code, and the path determination parts 123a to 123.
Output to n respectively. Then, the midamble correlation units 122a to 122n create a plurality of delay profiles by shifting the timing of multiplying the midamble portion of the received signal by the midamble replica code for each window width unit, and pass the plurality of delay profiles. Determination unit 123a
To 123n respectively.

The path deciding units 123a to 123n select channel valid values obtained by selecting only valid paths from the delay profiles output from the midamble correlating units 122a to 122n, respectively.
It outputs to 124n.

Midamble shift decision sections 124a-1.
24n determines whether all the input delay profiles are midamble codes that are actually multiplexed, and determines the determination result as code determination units 125a to 125.
output to n.

The code determining units 125a to 125n determine the channelization code used by the base station device of another cell for communication, and use the channelization code determined to be used and the scrambling code of the other cell. The generated spreading code is output to the JD demodulation unit 105.

JD demodulation section 105 performs joint detection calculation on the received signal using the delay profile and the replica of the spreading code, and decodes the obtained received signal in decoding section 1
It outputs to 06. Specifically, the JD demodulation unit 105 convolutionally multiplies the delay profile and the spread code replica to create a system matrix, and multiplies the received signal by the system matrix to obtain a demodulated received signal.

Decoding section 106 decodes the demodulated received signal to obtain received data. Then, decoding section 106 outputs the received signal to cell parameter acquisition section 107.

Cell parameter acquisition section 107 acquires the cell ID included in the BCH of the received signal and outputs it to cell parameter storage section 108. Here, the cell ID is an ID for identifying the cell.

The cell parameter storage unit 108 stores the cell ID
And outputs the cell ID in response to the request from the other cell parameter distribution unit 110. The parameter conversion unit 109 converts the cell ID into a midamble basic code and a scrambling code, and the other cell parameter distribution unit 110.
Output to.

The other cell parameter distribution unit 110 sets the midamble basic code used for communication in the other cell to the midamble replica code generation units 121a to 121a.
21n and the scrambling code used for communication in other cells is output to the code determination units 125a to 125n.

Next, the operation of the radio communication apparatus according to this embodiment will be described. FIG. 2 is a flow chart showing an example of the operation of the wireless communication device of the present embodiment.

In FIG. 2, in step (hereinafter referred to as "ST") 201, decoding section 106 decodes the received signal.

In ST202, cell parameter acquisition unit 1
The cell ID of the other cell is acquired from the BCH of the received signal decoded in 07, and the cell ID is the cell parameter storage unit 10.
8 is stored.

In ST203, parameter conversion section 109
In, the cell ID is converted into a cell parameter, and the converted cell parameter of the other cell (midamble basic code, scrambling code) is a midamble replica code generation unit 121a to 121n via the other cell parameter distribution unit 110, Code determination unit 125a
To 125n.

In ST204, midamble replica code generation section 111 generates a midamble replica code of the own cell, and midamble replica code generation sections 121a to 121n generate midamble replica codes of other cells.

At ST205, midamble correlation section 1
In 12, the correlation between the midamble portion of the received signal and the midamble replica code of the own cell is obtained, and in the midamble correlation portions 122a to 122n, the correlation between the midamble portion of the received signal and the midamble replica code of another cell is obtained. , And create a delay profile for each.

In ST206, path decision section 113 and path decision sections 123a to 123n select valid paths from the delay profiles and obtain channel estimation values.

In ST207, midamble shift decision section 114 decides which midamble shift user in the own cell is multiplexed and outputs the decision result to code decision section 115.

Similarly, the midamble shift decision unit 12
4a to 124n, it is determined which user has a different midamble shift in other cells,
The determination result is output to the code determination units 125a to 125n.

In ST208, code determining section 115 determines all channelization codes used in the own cell and generates a spreading code from the determined channelization code and the scrambling code of the own cell. Further, the code determination units 125a-12
In 5n, all channelization codes used in other cells are determined, and spreading codes are generated from the determined channelization codes and the scrambling code of the other cells.

In ST209, a replica of the spread code is output from code determining section 115 to JD demodulating section 105. From the code determination units 125a to 125n to the JD demodulation unit 1
It is output to 05.

In ST210, the JD demodulation section 105 generates a system matrix from the delay profile and the spread replica code, and the system matrix is multiplied by the received signal to obtain a demodulated received signal.

Next, signals received by the wireless communication apparatus of this embodiment will be described. FIG. 3 is a diagram showing an example of a delay profile in the wireless communication device of the present embodiment. In FIG. 3, the vertical axis represents the power value and the horizontal axis represents the time.

FIG. 3A is a delay profile showing the correlation between the midamble replica code used in the own cell and the midamble part of the received signal. Figure 3
(B) is a delay profile showing the correlation between the midamble replica code used in another cell and the midamble part of the received signal. In this example, the maximum number of midamble shifts is 8.

In FIG. 3A, the delay profile 3
Reference numerals 11 to 318 are delay profiles created by midambles cut out from the midamble basic code of the own cell by midamble shifts # 1 to # 8, respectively. The midamble shift is the number of shifts when shifting and cutting out the midamble code from the midamble basic code.

Similarly, in FIG. 3 (B), delay profiles 321 to 328 have midamble shift # 1 to midamble shift # 1 from the midamble basic code of another cell, respectively.
It is a delay profile created with the midamble cut out in # 8.

In FIG. 3 (A), when the delay profile 312 is for the signal destined for the own station, the delay profile 3
Reference numerals 11, 313 to 318 are delay profiles of signals for other communication terminal devices that communicate with the base station to which the own station belongs. Since these are interference components with respect to the own station, in the joint detection calculation, a system matrix for removing the interference components is created using these delay profiles, and the received signal is multiplied to remove the interference of the signal for the own station. .

Further, in the wireless communication apparatus of the present invention, the interference component due to the signal transmitted by the base station apparatus to which the own station does not belong is also targeted for removal. The delay profile 321 in FIG.
˜328 are delay profiles created by multiplying the signal received by the local station by the midamble code used by the base station apparatus to which the local station does not belong for communication.

Here, the delay profile 321 has a large signal level and is a large interference component with respect to the received signal. For example, in FIG. 27, when the communication terminal device 23 is receiving a signal, the base station device 31 is the communication terminal device 33.
The signal to be transmitted to the signal is a delay profile having a large signal level shown in the delay profile 302a.

Conventionally, since the interference of large power of other cells is not removed from the received signal, the delay profile 3
Although the interference component having a large signal level 21 has an effect on the demodulation of the received signal, the wireless communication device of the present invention creates a delay profile for the signal transmitted by the base station device of another cell and performs joint detection calculation. The signal from the other cell can be removed and the reception performance can be improved.

As described above, according to the radio communication apparatus of this embodiment, a delay profile of a radio signal transmitted from a base station apparatus to which the own station does not belong is created, and joint detection including this delay profile is performed. By performing the calculation, the signal transmitted from the base station apparatus to which the own station does not belong can be removed as an interference component, and the reception performance can be improved.

(Embodiment 2) FIG.4 is a block diagram showing a configuration of a radio communication apparatus according to Embodiment 2 of the present invention. However, the same components as those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

Radio communication apparatus 400 of FIG. 4 has path sort section 401 and cell / midamble shift selection section 402.
, Cell parameter selection unit 403, and code determination unit 41
5 and code determining units 425a to 425i, the signal levels of the paths are compared, and only the midamble-shifted user (spread code) having a path with a high signal level is removed as an interference component in FIG. Different from a wireless communication device.

Path determining section 113 outputs a channel estimation value obtained by selecting only valid paths from the delay profile output from midamble correlation section 112, to path sorting section 401. Similarly, the path determination units 123a to 123
23 n outputs the channel estimation value obtained by selecting only valid paths from the delay profiles output from the midamble correlation sections 122 a to 122 n to the path sorting section 401.

The path sort unit 401 includes the path determination unit 113.
And the cell / midamble shift selection unit 402 by comparing the path sizes from the channel estimation values output from the path determination units 123a to 123n and sorting the paths in descending order of the paths.
Output to.

Cell / midamble shift selection section 402
Selects i from the input sorted channel estimation values having the largest power other than that of the own station, and the code determination unit 42
5a to 425i. Further, cell / midamble shift selection section 402 outputs the selected midamble shift and cell identification information corresponding to the selected midamble shift to cell parameter selection section 403. Here, i is a number equal to or less than all the midamble shift numbers of all base stations other than the base station to which the own station belongs in the embodiment.

The cell / midamble shift selection section 402 outputs the midamble shift of its own station to the code determination section 415.

The other cell parameter distribution unit 110 sets the midamble basic code used for communication in the other cell to the midamble replica code generation units 121a to 121a.
21n and the scrambling code used for communication in another cell is output to the cell parameter selection unit 403.

Cell parameter selecting section 403 selects cell / midamble shift selecting section 40 among scrambling codes output from other cell parameter distributing section 110.
Only the scrambling code of the other cell selected in 2 is output to the code determination units 425a to 425i.

Since the code judging section 415 knows the channelization code used by the base station apparatus to which the own station belongs to communicate with itself, the code judging section 415 determines the spreading code from the channelization code and the scrambling code of the own cell. It is generated and output to the JD demodulation unit 105.

The code judging sections 425a to 425i are the cells
/ Determines the channelization code of the user including other cells other than the own station selected by the midamble shift selection unit 402, and generates a spreading code from the channelization code and the scrambling code of the other cell,
Output to the JD demodulation unit 105.

Next, the operation of the radio communication apparatus according to this embodiment will be described. FIG. 5 is a flowchart showing an example of the operation of the wireless communication device of the present embodiment.

In FIG. 5, in ST501, the decoding unit 1
At 06, the received signal is decoded. In ST502, the cell parameter acquisition unit 107 acquires the cell ID of another cell from the BCH of the received signal decoded, and the cell ID is stored in the cell parameter storage unit 108.

In ST503, parameter conversion section 109
In, the cell ID is converted into a cell parameter (midamble basic code, scrambling code), and among the converted cell parameters of other cells, the midamble basic code is a midamble replica code via the other cell parameter distribution unit 110. Generator 1
21a to 121n, and the scrambling code is output to the cell parameter selection unit 403.

In ST504, midamble replica code generation section 111 generates a midamble replica code of the own cell, and midamble replica code generation sections 121a to 121n generate midamble replica codes of other cells.

At ST505, midamble correlation section 1
At 12, the correlation between the midamble portion of the received signal and the midamble replica code of the own cell is obtained, and at the midamble correlation portions 122a to 122n, the correlation between the midamble of the received signal and the midamble replica code of another cell is obtained, Create a delay profile for each.

In ST506, the path determining section 113 and the path determining sections 123a to 123n select a valid path from the delay profile and obtain a channel estimation value.

In ST507, the path sort section 401 compares the maximum path power values for each delay profile,
The largest path power value (delay profile) is sorted in descending order.

In ST 508, cell / midamble shift selection section 402 selects i from the sorted channel estimation values input from the path sorting section from the one having the largest power other than that of its own station, and code determination sections 425 a to 425 a-4.
25i is output. Further, the midamble shift selected by the cell / midamble shift selection section 402 and the identification information of the cell corresponding to the selected midamble shift are output to the cell parameter selection section 403.

In ST 509, the code determination section 415 knows the channelization code used by the base station apparatus to which the own station belongs to communicate with itself, and therefore, based on the channelization code and the scrambling code of the own cell, A spreading code is generated and output to the JD demodulation unit 105. In addition, in the code determination units 425a to 425i, the channelization code of the user including other cells other than the own station selected by the cell / midamble shift selection unit 402 is determined, and the channelization code and the scrambling of the other cells are determined. A spreading code is generated from the ring code and output to the JD demodulation unit 105.

In ST510, the spread code replica is output from code determining sections 415 to 425i to JD demodulating section 105.

[0131] In ST511, the JD demodulation section 105 generates a system matrix from the delay profile and the spread replica code, and the system matrix is multiplied by the received signal to obtain a demodulated received signal.

The operation of the path sort unit 401 will be described. FIG. 6 is a diagram showing an example of a path sort operation in the wireless communication device of the present embodiment.

FIG. 6A shows the midamble shift and the power value before being processed by the path sort unit 401. The number of midamble shifts corresponds to the number of midamble shifts in the delay profile of FIG. Here, # 1 (self) to # 8 (self) represent the number of the midamble shift of the delay profile obtained by multiplying the midamble part of the received signal by the midamble replica code of the own cell, and # 1 (Other 1) to # 8 (Other 1) show the number of the midamble shift of the delay profile obtained by multiplying the midamble part of the received signal by the midamble replica code of the other cell.

The path sort unit 401 sorts the power values of the paths in each midamble shift together with the own cell and other cells. FIG. 6B shows the midamble shift and the power value after processing in the path sort unit 401. cell/
The midamble shift selection unit 403 selects cell / midamble shift from the result of FIG. 6B in order of increasing path for both the own cell and other cells.

As described above, according to the radio communication apparatus of this embodiment, the signal levels of the paths are compared from the own cell and other cells, and the user of the midamble shift having the path having the higher signal level uses the midamble shift. By removing only the signal as the interference component, it is possible to reduce the processing required for the joint detection calculation for removing the interference signal transmitted from the base station device to which the own station does not belong, and the calculation processing amount of the wireless communication device. Can be reduced.

In the wireless communication device of this embodiment,
Channel selection values of a predetermined number of midamble shifts are selected from the delay profile in the order of effective paths in order of increasing path sort path.However, the path selection method is not limited to this, and the path selection method is not limited to this. You may select the path | pass which gives interference more than fixed quantity.

For example, a value obtained by subtracting a predetermined value from the signal level of the path having the highest signal level in the delay profile of the radio signal transmitted from the base station apparatus to which the own station belongs is set as a threshold value, and the paths having the threshold value or more are selected. You can also choose.

(Embodiment 3) FIG.7 is a block diagram showing a configuration of a radio communication apparatus according to Embodiment 3 of the present invention. However, the same components as those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

Radio communication apparatus 600 in FIG. 7 has received power measuring section 601, received power comparing section 602, and cell selecting section 6
03 and a cell parameter selection unit 604, the power values of received signals are compared on a cell-by-cell basis, and a signal transmitted from a cell having a high power value is removed as an interference component.
Wireless communication device.

Radio section 101 receives a radio signal, amplifies the received radio signal, frequency-converts the obtained baseband received signal, delay section 102, midamble correlation section 112, and midamble correlation. Parts 122a-12
2j and outputs to the received power measuring unit 601.

Reception power measuring section 601 measures the reception power of the radio signal in cell units, and outputs the measurement result and cell ID to reception power comparing section 602. Specifically, the reception power measuring unit 601 measures the reception power of the PCCPCH for each cell.

Reception power comparing section 602 rearranges the measurement results in descending order of power value and outputs the power value and cell ID to cell selecting section 603. The cell selection unit 603 selects j other cells from the one with the highest power value, and outputs the cell ID of the selected cell to the cell parameter selection unit 604.

Cell parameter selecting section 604 outputs the midamble replica code corresponding to the cell selected by cell selecting section 603 to midamble replica code generating sections 121a to 121j and the scrambling code to code determining sections 125a to 125j. To do. here,
j is a number equal to or less than the number n of base stations other than the base station to which the own station belongs.

Midamble replica code generation unit 12
1a to 121j create a replica of the midamble code from the midamble basic code output from the cell parameter selection unit to generate a midamble correlation unit 12
2a to 122j, respectively.

The code determining units 125a to 125j determine the channelization code used by the base station device of the other cell for communication, and use the channelization code determined to be used and the scrambling code of the other cell. The generated diffusion code is output to the JD demodulation unit 105.

Next, the operation of the radio communication apparatus according to this embodiment will be described. FIG. 8 is a flow chart showing an example of the operation of the wireless communication device of the present embodiment.

In FIG. 8, in ST701, received power measuring section 601 measures the received power of a radio signal in cell units.

In ST702, received power comparison section 602 rearranges power values in descending order.

In ST703, cell selecting section 603 selects j other cells from the one having the highest power value, and cell parameter selecting section 604 selects the midamble basic code corresponding to the selected cell as the midamble replica code. The scrambling codes are sent to the generation units 121a to 121j and the code determination units 125a to 125j.
Is output to.

In ST704, decoding section 106 decodes the received signal.

In ST705, cell parameter acquisition section 1
The cell ID of the other cell is acquired from the BCH of the received signal decoded in 07, and the cell ID is the cell parameter storage unit 10.
8 is stored.

In ST706, parameter conversion section 109
In, the cell ID is converted into a cell parameter (midamble basic code, scrambling code), and the converted cell parameter of the other cell is output to the cell parameter selection unit via the other cell parameter distribution unit 110, and the cell selection unit The midamble basic code of the other cell selected in 603 is output to the midamble replica code generation units 121a to 121j, and the scrambling code is output to the code determination units 125a to 125j.

In ST707, midamble replica code generation section 111 generates the midamble replica code of the own cell, and midamble replica code generation sections 121a to 121j select cell selection section 6
The midamble replica code of the other cell selected in 03 is generated.

At ST708, midamble correlation section 1
In 12, the correlation between the midamble portion of the received signal and the midamble replica code of the own cell is obtained, and in the midamble correlation portions 122a to 122j, the correlation between the midamble portion of the received signal and the midamble replica code of another cell is obtained. , And create a delay profile for each.

In ST709, the path determining section 113 and the path determining sections 123a to 123j select a valid path from the delay profile and obtain a channel estimation value.

In ST710, midamble shift determination section 114 determines which midamble shift user in the cell is multiplexed and outputs the determination result to code determination section 115.

Similarly, the midamble shift determination unit 12
4a to 124j, it is determined which midamble shift user is multiplexed in another cell,
The determination result is output to the code determination units 125a to 125j.

In ST711, code determination section 115 determines all spreading codes used in the own cell. In addition, the code determining units 125a to 125j determine all spreading codes used in other cells selected by the cell selecting unit 603.

In ST712, a replica of the spread code is output from code determining section 115 to JD demodulating section 105.

In ST713, the JD demodulation section 105 generates a system matrix from the delay profile and the spread replica code, and the system matrix is multiplied by the received signal to obtain a demodulated received signal.

As described above, according to the radio communication apparatus of the present embodiment, the power values of received signals are compared on a cell-by-cell basis, and a signal transmitted from a cell having a high power value is removed as an interference component. It is possible to reduce the processing required for midamble replica code generation, delay profile generation, path determination, midamble shift determination, spread code determination, and spread replica code generation, and to reduce the amount of calculation processing of the wireless communication device. it can.

Also, the wireless communication device of the second embodiment and the wireless communication device of the third embodiment can be applied in combination. In this case, it is realized by comparing the power value of the received signal on a cell-by-cell basis, using the signal transmitted from the cell with a large power value as the interference component, and then selecting the interference component on a midamble shift (user) basis. be able to.

(Embodiment 4) FIG. 9 is a block diagram showing the configuration of a radio communication apparatus according to Embodiment 4 of the present invention. However, the same components as those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

Radio communication apparatus 800 in FIG. 9 is provided with received power measuring section 801, received power measuring section 802, received power comparing section 803, and control section 804, and is a signal transmitted from each base station apparatus. 1 individually compares the received power values of the wireless communication devices, and determines from the comparison result whether or not to perform joint detection calculation using a signal transmitted from a base station device to which the local station does not belong as an interference component. Different from

Radio section 101 receives a radio signal, amplifies the received radio signal, frequency-converts the obtained baseband received signal, delay section 102, midamble correlation section 112, and midamble correlation. Parts 122a-12
2n and outputs to the received power measuring unit 801.

The received power measuring unit 801 measures the received power of the radio signal transmitted from the base station apparatus to which the own station belongs,
The measurement result is output to the reception power comparison unit 803. Specifically, the received power measuring unit 801 determines that the received signal PCCPCH
Measure the received power of. The reception power measuring unit 802 measures the reception power of radio signals transmitted from n (a to n) base station devices to which the own station does not belong, and outputs the measurement result to the reception power comparing unit 803.

The reception power comparison unit 803 individually compares the reception power value of the signal transmitted from the base station device to which the own station belongs and the reception power value of the signal transmitted from each base station device, and controls the comparison result. It is output to the unit 804. The control unit 804 gives an instruction to control whether or not the delay profile creation units 104a to 104n operate according to the determination result of the received power comparison unit 803.

For example, the control unit 804 may control the delay profile generators 104a to 104n to supply or stop the power supply, or control the delay profile to be output or not to be output. The control unit 804 creates a delay profile from the result of individually comparing the received power value of the signal transmitted from the base station device to which the own station belongs and the received power value of the signal transmitted from each base station device to which the own station does not belong. It is possible to individually control whether or not the units 104a to 104n operate.

Next, the operation of the radio communication apparatus according to this embodiment will be described. FIG. 10 is a flowchart showing an example of the operation of the wireless communication device of this embodiment.

In FIG. 10, in ST901, received power measuring section 801 measures the received power of a radio signal transmitted from the base station apparatus to which the own station belongs, and received power measuring section 802 determines that n does not belong to the own station. The reception power of the radio signal transmitted from each of the base station devices is measured. ST
In 902, in the reception power comparison unit 803, the reception power of the radio signal transmitted from the base station device to which the own station belongs,
The received power values of the radio signals transmitted from the n base station devices to which the own station does not belong are compared.

In ST903, control section 804
Based on the determination result of the reception power comparison unit 803, it is determined whether the reception power value of the signal transmitted from the base station device to which the own station belongs is greater than or less than the reception power value of the signal transmitted from the base station device to which the own station does not belong. . When the received power value of the signal for the local station is equal to or higher than the received power value of the signal transmitted from the base station device to which the local station does not belong, the process proceeds to ST904. If the received power value of the signal for the own station is less than the received power value of the signal transmitted from the base station apparatus to which the own station does not belong, ST905
Proceed to. It should be noted that the difference between the received power value of the signal transmitted from the base station device to which the own station belongs and the received power value of the signal transmitted from the base station device to which the own station does not belong is calculated. If the difference is equal to or greater than a specific threshold value, ST904 Go to step ST905 if less than the threshold
You may take the structure which progresses to.

In ST904, a delay profile is created only by delay profile creating section 103. ST90
5, the delay profile creation units 104a to 10a corresponding to other cells whose received power value is larger than the received power value of the own cell.
4n and the delay profile creation unit 103 create a delay profile.

In ST906, JD demodulation section 105 performs joint detection calculation to demodulate the received signal.

As described above, according to the radio communication apparatus of the present embodiment, the received power values of the signals transmitted from the respective base station apparatuses are compared, and the base station apparatus to which the own station does not belong is transmitted from the comparison result. By determining whether or not to perform joint detection calculation using the received signal as an interference component, processing such as delay profile creation can be performed only for the amount necessary for interference removal, and the amount of calculation and power consumption can be reduced. You can

The method is not limited to the method of measuring the received powers of the signals from all the base stations to which the own station does not belong and comparing with the received power from the base stations to which the own station belongs, but the own station belongs to the The interference power from all non-existing base stations may be measured, and if the interference power is less than or equal to a certain threshold, JD may be performed only for the own cell.

Further, the radio communication apparatus of this embodiment can be applied in combination with the radio communication apparatus of Embodiments 1 to 3. In this case, this can be realized by controlling the part that processes the signal transmitted from the base station device to which the own station does not belong.

(Embodiment 5) When the interference component from the signal transmitted from the base station to which the own station does not belong is removed from the received signal, the signal transmitted by the base station to which this own station does not belong is removed. It is necessary to know if the data is being sent in such a state. In the present embodiment, the control station device uses the multiplexing information at the time of signal transmission of each base station device, for example, TD-C.
An example will be described in which the maximum number of midamble shifts in the DMA communication, the midamble allocation mode, or the like is notified, and the wireless communication device specifies and removes the interference component using these pieces of information.

FIG. 11 is a diagram showing an example of configurations of a control station apparatus, a base station apparatus, and a wireless communication apparatus according to Embodiment 5 of the present invention. In FIG. 11, the control station device 1101
Controls the base station devices (BS) 1111 to 1117,
Also communicate. The wireless communication device 1121 exists in the communication area of the base station device 1111 and communicates with the base station device 1111.

The control station apparatus 1101 is the base station apparatus 111.
The information items 1 to 1117 at the time of signal transmission, for example, information items such as multiplexing information at the time of signal transmission are determined and notified to the wireless communication device 1121 via the base station device 1111.

The detailed operations of the control station apparatus, base station apparatus, and wireless communication apparatus will be described below. FIG. 12 is a block diagram showing an example of configurations of a control station apparatus and a base station apparatus according to Embodiment 5 of the present invention.

In FIG. 12, the control station device 1200 is
Signaling parameter storage unit 1201 and distribution unit 12
It is mainly composed of 02 and. In addition, the base station device 1250
Is mainly composed of a communication unit 1251 and a wireless transmission unit 1252.

Signaling parameter storage unit 1201
Stores other cell information (cell ID in TD-CDMA, maximum midamble shift number, midamble allocation mode, etc.) indicating the signal transmission method of each base station apparatus, and outputs it to distribution section 1202. Delivery unit 12
02 transmits the other cell information to the communication unit 1251.

The communication section 1251 receives the other cell information and outputs it to the wireless transmission section 1252. Wireless transmitter 1252
Converts other cell information into a radio signal and transmits it.

Next, the wireless communication device will be described. FIG. 13 is a block diagram showing an example of the configuration of the radio reception apparatus according to Embodiment 5 of the present invention. However, the same components as those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

Radio receiving apparatus 1300 of FIG. 13 has signaling acquisition section 1301 and signaling storage section 1302.
, Signaling distribution section 1303, midamble shift determination sections 1304a to 1304n, and code determination section 1
305a to 1305n and a JD demodulation unit 1306, and extracts from the radio signal the information of the midamble code and spreading code used by the base station apparatus other than the base station with which the local station is communicating for communication. 1 is different from the wireless reception device of FIG. 1 in that the interference component is estimated from the received signal using the information of 1) and the joint detection calculation is performed.

Decoding section 106 decodes the demodulated received signal to obtain received data. Then, decoding section 106 outputs the received signal to cell parameter acquisition section 107 and signaling acquisition section 1301.

[0187] Signaling acquisition section 1301 acquires another cell parameter included in the dedicated control channel (hereinafter referred to as DCCH) of the received signal and outputs it to signaling storage section 1302. Here, the other cell parameter is a parameter used for communication by a base station device other than the base station with which the wireless reception device 1300 is communicating. Specifically, the other cell parameter indicates the maximum number of midamble shifts of the midamble code and the midamble allocation mode. The midamble allocation mode can be user-specific, user-specific, or code-specific.

Signaling storage section 1302 stores the other cell parameters and outputs the other cell parameters in response to the request from signaling distribution section 1303. The signaling distribution unit 1303 determines the maximum number of midamble shifts and the number of midamble allocation modes of the midamble basic code used for communication in other cells to the midamble shift determination units 1304a to 1304n, the code determination units 1305a to 1305n, and the JD demodulation unit 1306. Output.

The path deciding units 123a to 123n select channel effective values obtained by selecting only valid paths from the delay profiles output from the midamble correlating units 122a to 122n, and a midamble shift deciding unit 1304a.
To 1304n.

Midamble shift determination section 1304a-
1304n uses the maximum number of midamble shifts of the midamble code and the midamble allocation mode output from the signaling distribution unit 1303,
For all input delay profiles, determine whether the midamble code is actually multiplexed,
The judgment result is output to the code judgment units 1305a to 1305n.

The code judging units 1305a-1305n are
The maximum number of midamble shifts of the midamble code and the midamble allocation mode output from the signaling distribution unit 1303, and the midamble shift determination results output from the midamble shift determination units 1304a to 1304n are used to determine the base station of another cell. The device determines the channelization code used for communication, and outputs the spreading code generated from the channelization code determined to be used and the scrambling code of the other cell to the JD demodulation unit 1306.

JD demodulation section 1306 performs joint detection calculation on the received signal using the delay profile and the spread code replica, and outputs the obtained received signal to decoding section 106. Specifically, the JD demodulation unit 1306
Is a convolution product of a delay profile and a spread code replica to create a system matrix, and the received signal is multiplied by the system matrix to obtain a demodulated received signal.

Next, the control station device 120 of the present embodiment
0, base station apparatus 1250, and wireless communication apparatus 1300 exchange signals.

First, the exchange regarding the list of adjacent cells will be described. FIG. 14 is a sequence diagram showing an example of signal exchange between the control station device, the base station device, and the mobile station device according to the present embodiment. The mobile station apparatus of FIG. 14 shows a wireless communication apparatus 1300.

In FIG. 14, the control station device first transmits another cell list, which is information on a list of cells adjacent to the base station device. Then, the base station device transmits the other cell list to the mobile station device by a radio signal.

The mobile station device measures the RSCP of the P-CCPCH of the cell included in the received other cell list, and transmits the measurement result to the base station device as a radio signal. The base station device transmits this measurement result to the control station device, and the control station device updates the other cell list based on the measurement result.

Then, the control station apparatus determines the information of each cell in the updated other cell list, for example, the maximum number of midamble shifts of the midamble code used in each cell or the midamble allocation mode, etc. To the mobile station device. These pieces of information differ depending on the method of multiplexing data in the slots, so that the mobile station apparatus can cancel interference from the received signal by transmitting the information from the control station apparatus to the mobile station apparatus.

FIG. 15 is a sequence diagram showing an example of signal exchange between the control station apparatus, the base station apparatus and the mobile station apparatus of this embodiment. The mobile station apparatus of FIG. 15 shows a wireless communication apparatus 1300.

The control station device sets the maximum number of midamble shifts and the midamble allocation mode of the base station with which the mobile station device, which is the destination of information, is not communicating,
It transmits to a mobile station apparatus via a base station apparatus. The mobile station apparatus obtains information on the maximum number of midamble shifts and the midamble allocation mode of the base station apparatus to which the mobile station does not belong. Then, in the joint detection calculation, the mobile station device uses these pieces of information to identify the radio signal transmitted from the base station device to which the mobile station does not belong, and removes it from the received signal as an interference component.

As described above, the control station device of the present embodiment,
According to the base station device and the wireless communication device, in the control station device, the multiplexing information at the time of transmission in the base station device to which the wireless communication device does not transmit is transmitted via the base station device, and in the wireless communication device, By using this multiplexing information to identify the interference component and remove it from the received signal, joint detection calculation can be performed and reception performance can be improved without having to estimate the multiplexing information.

(Embodiment 6) In Embodiment 6, in order to remove a signal with large interference in the radio communication apparatus,
The reception levels of the signals transmitted from the base station apparatus to which the own station does not belong are compared, and the signal transmitted from the base station apparatus that has transmitted the signal having a large reception level is removed from the reception signal as an interference component. In addition, in the sixth embodiment, the other cell list is distributed similarly to the description of FIG. 14 of the fifth embodiment.

FIG. 16 is a diagram showing an example of configurations of a control station apparatus, a base station apparatus, and a radio communication apparatus according to Embodiment 6 of the present invention. The control station device 1500 of FIG. 16 is different from the control station device of FIG. 12 in that the control station device 1500 includes a cell selection unit 1501 and transmits the multiplexing information at the time of signal transmission for the base station device designated by the wireless communication device. Similarly, the base station device 1550 of FIG. 16 includes a wireless reception unit 1551 and a communication unit 1552, and controls a transmission request of multiplexing information at the time of signal transmission with respect to a base station device designated by the wireless communication device. It differs from the base station apparatus of FIG. 12 in that it is transmitted to the station apparatus 1500.

Radio receiving section 1551 receives a radio signal including a transmission request of multiplexing information at the time of signal transmission from the base station apparatus designated by the radio communication apparatus, and outputs it to communication section 1552. The communication unit 1552 transmits a transmission request of the multiplexing information at the time of signal transmission for the base station device designated by the wireless communication device, to the cell selection unit 1501 of the control station device 1500. Further, the communication unit 1552 receives the other cell information and outputs it to the wireless transmission unit 1252. Wireless transmitter 1252
Converts other cell information into a radio signal and transmits it.

The cell selection unit 1501 extracts the requested multiplexing information from the signaling parameter storage unit according to the transmission request of the multiplexing information at the time of signal transmission with respect to the base station device designated by the radio communication device, and outputs it to the distribution unit 1202. Output. The distribution unit 1202 transmits the multiplexing information output from the cell selection unit 1501 to the communication unit 1552.

Next, the radio communication device will be described. FIG. 17 is a block diagram showing an example of the configuration of the radio reception apparatus according to Embodiment 6 of the present invention. However, the same components as those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

Radio receiving apparatus 1600 of FIG. 17 has reception power measuring section 1601, reception power comparing section 1602, cell selecting section 1603, transmitting section 1604, and wireless transmitting section 16
05, which is different from the wireless reception device of FIG.

Radio section 101 receives a radio signal, amplifies the received radio signal and frequency-converts the obtained baseband received signal, delay section 102, midamble correlation section 112, and midamble correlation. Parts 122a-12
2n, and outputs to the received power measuring unit 1601.

Reception power measuring section 1601 measures RSCP of P-CCPCH for all cells of cell ID notified from the control device via the base station, and outputs the measurement result to reception power comparing section 1602. .

Received power comparison section 1602 compares the measurement results for each base station apparatus, ranks the received powers in descending order, and outputs this order to cell selection section 1603. The cell selection unit 1603 selects a predetermined number of higher base station devices among the base station devices ranked by the received power comparison unit 1602. Then, an instruction to request other cell information of the selected base station device is output to transmitting section 1604.

The transmitting unit 1604 multiplexes the request output from the cell selecting unit 1603 on the transmission data, and the radio transmitting unit 1
Output to 605. The wireless transmission unit 1605 is the transmission unit 16
The signal including the request output from 04 is subjected to processing such as modulation and conversion into a radio frequency, and is transmitted as a radio signal.

[0211] Next, the control station apparatus 150 of this embodiment
0, base station apparatus 1550, and wireless communication apparatus 1600 exchange signals. First, the fifth embodiment
The other cell list is distributed in the same manner as described with reference to FIG.

FIG. 18 is a sequence diagram showing an example of signal exchange between the control station apparatus, the base station apparatus and the mobile station apparatus according to this embodiment. The mobile station apparatus of FIG. 18 shows a wireless communication apparatus 1600.

[0213] First, the mobile station apparatus uses the P-CCP of another cell.
Measure PSCP of CH. And the measured P-CC
PSCP of PCH is a predetermined number M in descending order of received power value.
Each base station device (cell) is selected, and other cell information of the selected base station device is requested to the control station device. The base station device receives this request and transmits it to the control station device.

The control station device sends the requested other cell information to
It transmits to a mobile station apparatus via a base station apparatus. The mobile station apparatus obtains information on the maximum number of midamble shifts and the midamble allocation mode of the base station apparatus to which the mobile station does not belong. Then, in the joint detection calculation, the mobile station device uses these pieces of information to identify the radio signal transmitted from the base station device to which the mobile station does not belong, and removes it from the received signal as an interference component.

As described above, the control station apparatus of the present embodiment,
According to the base station device and the wireless communication device, in order to remove a signal with large interference in the wireless communication device, the reception levels of the signals transmitted from the base station device to which the own station does not belong are compared, and the signal with the large reception level is compared. By removing from the received signal the signal transmitted from the base station device that has transmitted as the interference component, it is possible to remove a signal with large interference with a small amount of processing and improve the reception performance.

(Embodiment 7) In Embodiment 7, the radio communication apparatus measures the reception level of the signal transmitted from the base station apparatus to which the own station does not belong, and the control station apparatus measures this reception level to the base station. The comparison is made on a station-by-station basis, and the base station apparatus that has transmitted a signal with a high reception level is selected. Then, the control station device notifies the wireless communication device of the multiplexing information at the time of signal transmission of the selected base station device, and the wireless communication device receives the signal transmitted from the selected base station device as an interference component. Remove from signal. In addition, in the seventh embodiment,
The other cell list is distributed in the same manner as described with reference to FIG. 14 of the fifth embodiment.

FIG. 19 is a diagram showing an example of configurations of a control station apparatus, a base station apparatus, and a wireless communication apparatus according to Embodiment 7 of the present invention. The control station device 1800 of FIG. 19 includes a received power comparison unit 1801 and a cell selection unit 1802,
The point that the received power value of P-CCPCH of each cell transmitted from the wireless communication device is compared to select a base station (cell) and the multiplexing information at the time of signal transmission is transmitted for the selected base station device is illustrated. It is different from 12 control station devices. Similarly, FIG.
The base station device 1850 includes a wireless reception unit 1851 and a communication unit 1852, and the received power value of the P-CCPCH of each cell transmitted from the wireless communication device is the control station device 180.
0 is different from the base station apparatus of FIG.

Radio receiving section 1851 receives a radio signal including the received power value of P-CCPCH of each cell transmitted from the radio communication apparatus and outputs it to communication section 1852. Communication unit 1
Reference numeral 852 indicates the received power value of the P-CCPCH as the control station device 1.
It is transmitted to the reception power comparison unit 1801 of 800. In addition, the communication unit 1852 receives the other cell information, and the wireless transmission unit 12 receives the information.
Output to 52. The wireless transmission unit 1252 converts other cell information into a wireless signal and transmits it.

The reception power comparing section 1801 is the communication section 185.
The received power values of the P-CCPCH transmitted from No. 2 are compared in base station units, and the received power values are ranked in descending order of received power, and this order is output to the cell selection unit 1802.

Cell selecting section 1802 has reception power comparing section 1
Among the base station devices ranked in 801, a predetermined number of higher base station devices are selected. Then, the cell selection unit 1
802 extracts the other cell information of the selected base station device from the signaling parameter storage unit 1201 and the distribution unit 12
Output to 02. The delivery unit 1202 uses the cell selection unit 150.
The multiplexed information output from 1 is transmitted to the communication unit 1852.

Next, the wireless communication device will be described. FIG. 20 is a block diagram showing an example of the configuration of the radio reception apparatus according to Embodiment 7 of the present invention. However, the same components as those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

Radio receiving apparatus 1900 of FIG. 20 has received power measuring section 1901, transmitting section 1902, and radio transmitting section 1
903 and that the received power measurement value of the P-CCPCH of each cell is transmitted by a radio signal, which is different from the radio reception device of FIG.

Radio section 101 receives a radio signal, amplifies the received radio signal, frequency-converts the obtained baseband received signal, delay section 102, midamble correlation section 112, and midamble correlation. Parts 122a-12
2n and outputs to the received power measuring unit 1901.

Reception power measuring section 1901 measures RSCP of P-CCPCH for all cells of cell ID notified from the control device via the base station, and outputs the measurement result to transmitting section 1902.

The transmitting section 1902 has a received power comparing section 190.
The measurement result output from 1 is multiplexed with the transmission data and output to the wireless transmission unit 1903. The wireless transmission unit 1903 modulates the signal including the measurement result output from the transmission unit 1604, performs processing such as conversion into a radio frequency, and transmits the signal as a radio signal.

Next, the control station device 180 of this embodiment
0, base station apparatus 1850, and wireless communication apparatus 1900 exchange signals. First, the fifth embodiment
The other cell list is distributed in the same manner as described with reference to FIG.

FIG. 21 is a sequence diagram showing an example of signal exchange between the control station apparatus, the base station apparatus and the mobile station apparatus according to this embodiment. The mobile station apparatus of FIG. 21 shows a wireless communication apparatus 1900.

[0228] First, the mobile station apparatus uses the P-CCP of another cell.
Measure RSCP of CH. Then, the measured RSCP of the P-CCPCH of the other cell is transmitted to the base station apparatus. The base station device receives the RSC of the received P-CCPCH of another cell.
P is transmitted to the control station device.

The control station device compares the RSCPs of the received P-CCPCH and selects a predetermined number N of base station devices (cells) in descending order of RSCP value. Then, the control station device transmits the other cell information of the selected base station device to the mobile station device via the base station device. The mobile station device is
The information about the maximum number of midamble shifts and the midamble allocation mode of the base station apparatus to which the own station does not belong is obtained. Then, in the joint detection calculation, the mobile station device uses these pieces of information to identify the radio signal transmitted from the base station device to which the mobile station does not belong, and removes it from the received signal as an interference component.

As described above, the control station device of the present embodiment,
According to the base station device and the wireless communication device, in order to remove a signal with large interference in the wireless communication device, the reception levels of the signals transmitted from the base station device to which the own station does not belong are compared, and the signal with the large reception level is compared. By removing from the received signal the signal transmitted from the base station device that has transmitted as the interference component, it is possible to remove a signal with large interference with a small amount of processing and improve the reception performance.

Further, according to the control station apparatus, the base station apparatus, and the wireless communication apparatus of this embodiment, the control station apparatus determines the base station apparatus that has transmitted a signal with a large reception level, thereby performing wireless communication. The device does not need to make the determination, and the configuration of the wireless communication device can be simplified and power consumption can be reduced.

(Embodiment 8) In Embodiment 8, a midamble code used by a base station apparatus to which a wireless communication apparatus belongs for communication and a midamble code used by a base station apparatus not belonging to a wireless communication apparatus for communication are multiplexed. An example when the states are different will be described.

[0233] The maximum number of midamble shifts of the above-mentioned midamble code changes depending on the maximum number of users assumed to be multiplexed in one slot and the cell radius of each cell. Since the length of the entire midamble code is constant, the length (time) per midamble shift varies depending on the maximum number of midamble shifts.

The wireless communication device of the present embodiment has a delay profile (channel estimation value) obtained from signals transmitted from both the base station to which its own station belongs and the base station to which its own station does not belong.
Are adjusted to the same time width and joint detection calculation is performed.

FIG. 22 is a block diagram showing an example of the configuration of the radio communication apparatus according to Embodiment 8 of the present invention. Figure 2
The wireless communication device 2100 of No. 2 is different from the wireless communication device of FIG. 13 in that the wireless communication device 2100 of 2 includes a size adjusting unit 2101 and adjusts the delay profile (channel estimation value) used for the joint detection calculation to the same time width in each cell. .

The midamble shift decision section 114 decides whether or not all the input delay profiles are actually multiplexed midamble codes.
Then, the midamble shift determination unit 114 outputs the determination result to the code determination unit 115 and the size adjustment unit 2101. Specifically, the midamble shift determination unit 11
4 is when using the midamble code common to all users,
Spreading code Different when using individual midamble code.

The code judging unit 115 judges the channelization code used by the base station apparatus to which the own station belongs for communication, and generates from the channelization code judged to be used and the scrambling code of the own cell. The generated spreading code is output to the JD demodulation unit 1306.

Midamble shift determination section 1304a-
1304n uses the maximum number of midamble shifts of the midamble code and the midamble allocation mode output from the signaling distribution unit 1303,
For all input delay profiles, determine whether the midamble code is actually multiplexed,
The judgment result is output to the code judgment units 1305a to 1305n and the size adjustment unit 2101.

The code judging units 1305a to 1305n are
The maximum number of midamble shifts of the midamble code and the midamble allocation mode output from the signaling distribution unit 1303, and the midamble shift determination results output from the midamble shift determination units 1304a to 1304n are used to determine the base station of another cell. The device determines the channelization code used for communication, and outputs the spreading code generated from the channelization code determined to be used and the scrambling code of the other cell to the JD demodulation unit 1306.

The size adjusting section 2101 has a midamble shift determining section 114 and a midamble shift determining section 13.
The delay profiles (channel estimation values) output from 04a to 1304n are adjusted to have the same time width between cells. Then, the adjusted delay profile (channel estimation value) is output to the JD demodulation unit 1306.

JD demodulation section 1306 performs a joint detection operation on the received signal using the delay profile and the spread code replica, and outputs the obtained received signal to decoding section 106. Specifically, the JD demodulation unit 1306
Is a convolution product of a delay profile and a spread code replica to create a system matrix, and the received signal is multiplied by the system matrix to obtain a demodulated received signal.

Next, the delay profile (channel estimation value) and spread code time width adjustment of the radio communication apparatus according to the present embodiment will be explained.

FIG. 23 is a diagram showing an example of a delay profile created in the wireless communication apparatus of this embodiment. FIG. 23A shows a delay profile for a signal transmitted from a base station apparatus (own cell base station) to which a wireless communication apparatus belongs. Further, FIG. 23B shows a delay profile for a signal transmitted from a base station device (other cell base station) to which the wireless communication device does not belong.

When the own cell base station assumes the maximum number of K users, that is, the maximum number of midamble shifts or K, the total length of the midamble code is divided by K. It is the length (time width) of the midamble shift. Similarly, when the other cell base station assumes the maximum number of users of K ′, that is, the maximum number of midambles or K.
In the case of ', the length of the entire midamble code divided by K'is each midamble shift. Where K
And K ′ are different, the length (time width) of the midamble shift, that is, the time width of the delay profile assigned to each user is different.

In the radio communication apparatus of this embodiment, the size adjusting section 2101 allows the length of the midamble shift,
That is, the length of the delay profile (channel estimate)
Adjust (Time Width) to the same time width in each cell.

FIG. 24 is a diagram showing an example of a delay profile created in the wireless communication apparatus of this embodiment. FIG. 24A shows a delay profile for a signal transmitted from a base station device (own cell base station) to which a wireless communication device belongs. 24B and 24C show delay profiles for signals transmitted from base station devices (other cell base stations) to which the wireless communication device does not belong. 24B and 24C are delay profiles of signals transmitted from different cells # 1 and # 2, respectively.

The time width of the delay profile of FIG. 24A is
W ₀ . The time width of the delay profile in FIG. 24B is W ₁ , and the time width of the delay profile in FIG. 24C is W ₂ . In cell # 1, since the number of assumed multiple users is smaller than that in the own cell, the time width W ₁ per midamble shift is longer than W ₀ . On the other hand, in cell # 2, since the expected number of multiple users is larger than that of the own cell, the time width W ₂ per midamble shift is shorter than W ₀ .

The size adjusting unit 2101 of the radio communication apparatus according to this embodiment adjusts other delay profiles by aligning them with the length of the delay profile of the cell having the longest time width. Specifically, in the delay profile of FIG. 24A, the time width W
The correlation value of the portion longer than ₀ is set to “0” and treated as a delay profile of the time width W ₁ . Similarly, in the delay profile of FIG. 24C, the correlation value of a portion longer than the time width W ₂ is set to “0” and treated as a delay profile of the time width W ₁ . The time width W of the delay profile for performing the joint detection calculation is W ₁ .

As described above, the radio communication apparatus according to the present embodiment adjusts the delay profile (channel estimation value) used for the joint detection calculation to the same time width in each cell, so that the midambles with different multiplicities are adjusted. Code, that is, even when receiving signals transmitted with different maximum midamble shift numbers, joint detection operation can be performed with the same matrix size, and signals transmitted from base station devices to which the own station does not belong The interference component can be removed to improve the reception performance. Furthermore, since the time width of the delay profile is adjusted to match the longest cell, the delay wave in other cells that are larger than the time width of the delay profile of the own cell can be removed and the reception performance can be improved. You can

In the above embodiment, the time width of the delay profile is adjusted to be the longest time width, but the time width is not particularly limited, and is longer than the time width of the delay profile of the own cell. If For example, the time width of the delay profile of its own cell may be adjusted to the time width of another delay profile.

FIG. 25 is a diagram showing an example of a delay profile created in the wireless communication apparatus of this embodiment. FIG. 25A shows a delay profile for a signal transmitted from a base station apparatus (own cell base station) to which a wireless communication apparatus belongs. Further, FIGS. 25B and 25C show delay profiles for signals transmitted from base station devices (other cell base stations) to which the wireless communication device does not belong. 25B and 25C are delay profiles of signals transmitted from different cells # 1 and # 2, respectively.

The time width of the delay profile of FIG. 25A is
W ₀ . The time width of the delay profile in FIG. 25B is W ₁ , and the time width of the delay profile in FIG. 25 is W ₂ . In cell # 1, since the number of assumed multiple users is smaller than that in the own cell, the time width W ₁ per midamble shift is longer than W ₀ . On the other hand, in cell # 2, since the expected number of multiple users is larger than that of the own cell, the time width W ₂ per midamble shift is shorter than W ₀ .

The size adjusting section 2101 of the radio communication apparatus according to this embodiment adjusts the delay profiles of other cells to the length of the delay profile of its own cell. Specifically, FIG.
The correlation value of the portion of the delay profile of 5B longer than the time width W ₁ is discarded and treated as a delay profile of the time width W ₀ . Further, in the delay profile of FIG. 24C, the correlation value of the portion longer than the time width W ₂ is set to “0”, and the time width W ₀
Treated as a delay profile. The time width W of the delay profile for performing the joint detection calculation is W ₀ .

As described above, the radio communication apparatus according to the present embodiment adjusts the delay profile (channel estimation value) used for the joint detection calculation to the same time width in each cell, so that the midambles with different multiplicities are adjusted. Even when receiving the signal transmitted by the code, joint detection calculation can be performed with the same matrix size as when removing the interference signal from the base station to which the own station belongs,
Furthermore, the signal transmitted from the base station device to which the own station does not belong can be removed as an interference component to improve the reception performance.

Further, the radio communication apparatus according to the present embodiment has a delay profile used for joint detection calculation.
By adjusting the (channel estimation value) by aligning the time width of the delay profile of each cell with the time width of the delay profile in which the own station is communicating, a base station device to which the own station does not belong can be calculated with a small amount of calculation. It is possible to improve the reception performance by removing the transmitted signal as an interference component.

In each of the embodiments, the information of the midamble code and the spreading code is acquired from the received signal, but the acquisition method is not limited, and the wireless communication device of the present invention starts communication with the base station device. At times, the information of the midamble code and the spreading code used in the cell adjacent to the own cell may be acquired from the base station, or the information of these codes may be acquired from the base station at any time during communication.

Further, when the information of the midamble code and the spread code cannot be acquired, these codes may be blindly estimated.

Further, the effects of the respective embodiments can be obtained by applying a plurality of the respective embodiments in combination.

Further, in the above description of the embodiment, the multiplexing information at the time of signal transmission of each base station apparatus, for example, TD-C is used.
The maximum number of midamble shifts or midamble allocation mode in DMA communication is notified, and the signal of another cell is removed from the received signal as an interference component, but this is not the only option, and a parameter that specifies the interference removal component is transmitted. Then, it can be removed as an interference component. For example, it can be realized by transmitting information such as midamble shift and channelization code of another user.

In each of the above embodiments, the P-CCP
Although the received power value of the CH is measured, the signal of the channel to be measured is not limited to this, and any sequence transmitted with known power may be used. For example, the received power value may be measured using a beacon channel or the like.

[0261]

As described above, according to the wireless communication apparatus and the wireless communication method of the present invention, a delay profile of a wireless signal transmitted from a base station apparatus to which the own station does not belong is created, and this delay profile is created. It is possible to improve the reception performance by performing joint detection calculation including, and removing the interference component from the desired received signal, thereby removing the signal transmitted from the base station device to which the own station does not belong, as the interference component. it can.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a wireless communication device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an example of the operation of the wireless communication device of the above embodiment.

FIG. 3 is a diagram showing an example of a delay profile in the wireless communication device of the present embodiment.

FIG. 4 is a block diagram showing a configuration of a wireless communication device according to a second embodiment of the present invention.

FIG. 5 is a flowchart showing an example of the operation of the wireless communication device of the above embodiment.

FIG. 6 is a diagram showing an example of a path sort operation in the wireless communication device of the present embodiment.

FIG. 7 is a block diagram showing a configuration of a wireless communication apparatus according to Embodiment 3 of the present invention.

FIG. 8 is a flowchart showing an example of the operation of the wireless communication device of the above embodiment.

FIG. 9 is a block diagram showing a configuration of a wireless communication apparatus according to Embodiment 4 of the present invention.

FIG. 10 is a flowchart showing an example of the operation of the wireless communication device of the above embodiment.

FIG. 11 is a diagram showing an example of configurations of a control station device, a base station device, and a mobile station device according to Embodiment 5 of the present invention.

FIG. 12 is a block diagram showing an example of configurations of a control station apparatus and a base station apparatus according to the above embodiment.

FIG. 13 is a block diagram showing an example of a configuration of a wireless reception device according to the above embodiment.

FIG. 14 is a sequence diagram showing an example of signal exchange between the control station device, the base station device, and the mobile station device according to the above embodiments.

FIG. 15 is a control station device, a base station device, and
And a sequence diagram showing an example of signal exchange between mobile station devices

FIG. 16 is a diagram showing an example of configurations of a control station apparatus, a base station apparatus, and a mobile station apparatus according to Embodiment 6 of the present invention.

FIG. 17 is a block diagram showing an example of a configuration of a wireless reception device according to the above embodiment.

FIG. 18 is a control station device, base station device, and
And a sequence diagram showing an example of signal exchange between mobile station devices

FIG. 19 is a diagram showing an example of configurations of a control station apparatus, a base station apparatus, and a mobile station apparatus according to Embodiment 7 of the present invention.

FIG. 20 is a block diagram showing an example of a configuration of a wireless reception device according to the above embodiment.

FIG. 21 is a control station device, a base station device, and
And a sequence diagram showing an example of signal exchange between mobile station devices

FIG. 22 is a block diagram showing an example of a configuration of a wireless communication apparatus according to Embodiment 8 of the present invention.

FIG. 23 is a diagram showing an example of a delay profile created in the wireless communication device of the above embodiment.

FIG. 24 is a diagram showing an example of a delay profile created in the wireless communication device of the above embodiment.

FIG. 25 is a diagram showing an example of a delay profile created in the wireless communication device of the above embodiment.

FIG. 26 is a block diagram showing an example of a configuration of a conventional wireless communication device.

FIG. 27 is a diagram showing an example of communication between a base station device and a communication terminal device.

FIG. 28 is a diagram showing an example of communication between a base station device and a communication terminal device.

[Explanation of symbols]

103, 104a to 104n Delay profile creation unit 105, 1306 JD demodulation unit 106 Decoding unit 107 Cell parameter acquisition unit 108 Cell parameter storage unit 109 Parameter conversion unit 110 Other cell parameter distribution unit 111, 121a to 121n Midamble replica code generation unit 112 , 122a to 122n Midamble correlation section 113, 123a to 123n Path determination section 114, 124a to 124n, 1304a to 1304n
Midamble shift determination section 115, 125a to 12
5n, 1305a to 1305n Code determination unit 401 Path sort unit 402 Cell / midamble shift selection unit 403, 604 Cell parameter selection unit 601, 801, 802, 1601, 1901 Received power measurement unit 602, 803, 1602, 1801 Received power comparison unit 603, 1501, 1603, 1802 Cell selection unit 804 Control unit 1201 Signaling parameter storage unit 1301 Signaling acquisition unit 1302 Signaling storage unit 1303 Signaling distribution unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Keiichi Kitagawa             3-1, Tsunashima-Higashi 4-chome, Kohoku-ku, Yokohama-shi, Kanagawa             Matsushita Communication Industry Co., Ltd. (72) Inventor Hiroki Haga             2-5-chome, Meidori, Izumi-ku, Sendai-shi, Miyagi Stock             Matsushita Communication Sendai Research Institute F-term (reference) 5K022 FF01                 5K067 AA03 AA42 AA43 CC10 DD19                       DD44 DD57 EE02 EE10 EE16                       EE23 HH22 HH23 HH24 JJ74

Claims (20)

[Claims] 1. A self-cell correlating means for creating a delay profile of a radio signal transmitted from a base station apparatus to which the own station belongs and a delay profile of a radio signal transmitted from a base station apparatus to which the own station does not belong. A joint for performing a joint detection operation using another cell correlation means, a delay profile created by the own cell correlation means and a delay profile created by the other cell correlation means, and removing an interference component of a received radio signal. A wireless communication device comprising: a detection calculation means. 2. A cell parameter acquisition means for acquiring identification information of a midamble code and a spreading code used for a radio signal transmitted from a base station to which the local station does not belong, from a demodulation result of a received signal, the midamble code, and Cell parameter distribution means for distributing the spread code identification information, and spread replica code generation means for generating a spread replica code corresponding to the spread code identification information distributed from the cell parameter distribution unit. Cell correlation means, a midamble replica code generation means for generating the midamble replica code corresponding to the identification information of the midamble code distributed from the cell parameter distribution means, the midamble replica code and the received signal Mid-an to create delay profile from correlation 2. The wireless communication device according to claim 1, further comprising a bull correlation unit. 3. A path detection means for extracting a predetermined number of paths from the delay profile, wherein the joint detection calculation means performs a joint detection calculation using the paths extracted by the path extraction means. The wireless communication device according to claim 1, wherein the wireless communication device is a wireless communication device. 4. A path extraction means for extracting a path that gives interference to a desired signal by a predetermined amount or more from a delay profile, and the joint detection calculation means uses the path extracted by the path extraction means. The wireless communication device according to claim 1 or 2, wherein a joint detection operation is performed. 5. A reception power measuring means for measuring a reception power value of a radio signal transmitted from a plurality of base station devices to which the own station does not belong, and a predetermined number from the base station device in descending order of the reception power value. Cell selecting means for selecting a base station device as a base station device for transmitting a radio signal targeted for removal, and the other cell correlating device is transmitted from the base station device selected by the cell selecting device. The wireless communication device according to any one of claims 1 to 4, wherein a delay profile of a wireless signal is created. 6. A self-cell reception power measuring means for measuring a reception power value of a radio signal transmitted from a base station device to which the self-station belongs and outputting it as a self-cell reception power value, and a plurality of bases to which the self-station does not belong. Other cell reception power measuring means for measuring the reception power value of the radio signal transmitted from the station device and outputting it as another cell reception power value, and reception power for comparing the own cell reception power value and the other cell reception power value In the case where the comparison means and the own cell reception power value are equal to or more than the other cell reception power value, the other cell correlation means is instructed to stop the operation, and the own cell reception power value is less than the other cell reception power value. 6. The wireless communication device according to claim 1, further comprising: a control unit that instructs the operation of the other cell correlation unit. 7. The base station apparatus, to which the own station does not belong, comprises signaling acquisition means for extracting from the received signal other cell information including multiplexing information at the time of transmission, and the other cell correlation means includes the other cell information. The channelization code is identified based on the joint detection calculation means,
The wireless communication device according to claim 1, wherein joint detection calculation is performed using the channelization code identified by the other cell correlation unit. 8. The wireless communication apparatus according to claim 7, wherein the other cell information is a maximum number of midamble shifts. 9. The wireless communication apparatus according to claim 7, wherein the other cell information is information indicating the identification of the midamble allocation mode. 10. The other-cell correlation means identifies a midamble code based on the other-cell information, and the joint detection calculation means uses the midamble code identified by the other-cell correlation means to perform a joint detection calculation. The wireless communication device according to any one of claims 7 to 9, characterized by performing. 11. Another cell reception power measuring means for measuring, for each channel, the reception power of a radio signal transmitted from a base station apparatus to which the own station does not belong, and the value of the reception power measured for each channel is transmitted as a radio signal. The wireless communication device according to any one of claims 7 to 10, further comprising: 12. Another cell received power measuring means for measuring, for each channel, received power of a radio signal transmitted from a base station device to which the own station does not belong, and the own station in descending order of the measured received power value for each channel. 7. A transmission means is provided for selecting a predetermined number of base station devices to which the wireless base station does not belong and transmitting a request for other cell information of the base station device by radio signal.
11. The wireless communication device according to claim 10. 13. A code adjusting means for adjusting a code used for joint detection calculation and a channel estimation value to have the same time width for each channel, wherein the joint detection calculating means includes a code adjusted by the adjusting means. The wireless communication device according to any one of claims 1 to 12, wherein joint detection calculation is performed using a channel estimation value. 14. A cell information storage means for storing other cell information including multiplexing information at the time of transmission in a plurality of base station devices, and a transmitting means for transmitting the other cell information. Control station equipment. 15. A receiving means for receiving a request for other cell information, and a selecting means for taking out the requested other cell information from the cell information storing means, wherein the transmitting means includes the requested other cell information. The control station device according to claim 14, wherein the control station device transmits. 16. Receiving means for receiving a signal including the measured received power value for each channel, and selecting means for selecting a predetermined number of base station devices in descending order of the measured received power value for each channel. 15. The control station apparatus according to claim 14, further comprising: a selection unit that extracts the selected other cell information from the cell information storage unit, and the transmission unit transmits the selected other cell information. 17. A reception means for receiving other cell information including multiplexing information at the time of transmission in a plurality of base station devices, and a wireless transmission means for transmitting the other cell information by a radio signal. A characteristic base station device. 18. A radio reception unit for receiving a radio signal including a request for other cell information, and a transmission unit for transmitting the request for other cell information.
The base station device according to 1. 19. A wireless communication device, comprising: a wireless receiving means for receiving a wireless signal including a measured received power value for each channel; and a transmitting means for transmitting a signal including the received power value. Item 17. The base station device according to Item 17. 20. A self-correlation process for creating a delay profile of a radio signal transmitted from a base station device to which the self station belongs and a delay profile of a radio signal transmitted from a base station device to which the self station does not belong. Joint for removing the interference component of the received radio signal by performing a joint detection operation using the other cell correlation step, the delay profile created in the own cell correlation step and the delay profile created in the other cell correlation step A detection operation step, and a wireless communication method.