JP5119079B2 - Wireless communication device - Google Patents

Wireless communication device Download PDF

Info

Publication number
JP5119079B2
JP5119079B2 JP2008200697A JP2008200697A JP5119079B2 JP 5119079 B2 JP5119079 B2 JP 5119079B2 JP 2008200697 A JP2008200697 A JP 2008200697A JP 2008200697 A JP2008200697 A JP 2008200697A JP 5119079 B2 JP5119079 B2 JP 5119079B2
Authority
JP
Japan
Prior art keywords
channel
radio signal
unit
wireless communication
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2008200697A
Other languages
Japanese (ja)
Other versions
JP2010041290A (en
Inventor
忠行 福原
和則 竹内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KDDI Corp
Original Assignee
KDDI Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KDDI Corp filed Critical KDDI Corp
Priority to JP2008200697A priority Critical patent/JP5119079B2/en
Publication of JP2010041290A publication Critical patent/JP2010041290A/en
Application granted granted Critical
Publication of JP5119079B2 publication Critical patent/JP5119079B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Monitoring And Testing Of Transmission In General (AREA)

Description

本発明は、無線通信装置に関する。   The present invention relates to a wireless communication apparatus.

コグニティブ無線技術は、特性の異なる複数の無線システムの使用状況を認識し、複数の無線システムを適応的に使用することにより周波数利用効率を向上させる技術である。また、コグニティブ無線は多種多様な無線情報を活用するため、無線の品質を正確に把握することが重要である。無線の品質としては、受信信号強度（ＲＳＳＩ、Ｒｅｃｅｉｖｅｄ Ｓｉｇｎａｌ Ｓｔｒｅｎｇｔｈ Ｉｎｄｉｃａｔｏｒ）や伝送路特性など個々の端末と基地局との位置関係で決まる項目と、ＣＩＮＲ（Ｃａｒｒｉｅｒ ｔｏ Ｉｎｔｅｒｆｅｒｅｎｃｅ ａｎｄ Ｎｏｉｓｅ Ｒａｔｉｏ、搬送波対干渉波及び雑音の電力比）など他の端末の通信状況が影響する項目がある。   The cognitive radio technology is a technology for recognizing the usage status of a plurality of radio systems having different characteristics and improving the frequency utilization efficiency by adaptively using the plurality of radio systems. In addition, since cognitive radio uses a wide variety of radio information, it is important to accurately grasp radio quality. Radio quality includes items determined by the positional relationship between individual terminals and base stations, such as received signal strength (RSSI, Received Signal Strength Indicator) and transmission path characteristics, CINR (Carrier to Interference and Noise Ratio), and carrier-to-interference waves. There are items that are affected by the communication status of other terminals, such as the power ratio of noise.

ＣＩＮＲの取得には、通信の状況を監視する必要がある。ＷｉＭＡＸなどの通信の状況を監視し、ＣＩＮＲを取得する方法としては以下の方法が知られている。初めに、所望チャネルの受信信号のプリアンブル部分から既知のプリアンブル信号を抽出しレプリカを作成する。続いて、受信信号からレプリカを除去することにより、干渉を含むノイズ電力を求める。続いて、干渉を含むノイズ電力と、所望の電力との比からＣＩＮＲを求める（例えば、特許文献１参照）。
特開２００８−６１２４４号公報 To obtain CINR, it is necessary to monitor the communication status. The following methods are known as methods for monitoring the communication status such as WiMAX and acquiring CINR. First, a known preamble signal is extracted from the preamble portion of the received signal of the desired channel to create a replica. Subsequently, the noise power including interference is obtained by removing the replica from the received signal. Subsequently, CINR is obtained from the ratio between the noise power including interference and the desired power (see, for example, Patent Document 1).
JP 2008-61244 A

ＷｉＭＡＸのように各基地局が常にダウンリンクの信号を送信する場合には特許文献１の方法により干渉電力を求めることができる。しかしながら、自身が使用しているチャネルとは異なるチャネルで送信された無線信号の干渉電力を求めることができなという問題がある。   When each base station always transmits a downlink signal as in WiMAX, the interference power can be obtained by the method of Patent Document 1. However, there is a problem that interference power of a radio signal transmitted through a channel different from the channel used by itself cannot be obtained.

本発明は上記の課題を解決するためになされたものであり、無線通信装置が使用するチャネルとは異なるチャネルで送信された無線信号の干渉電力を求めることが可能な無線通信装置を提供することを目的とする。   The present invention has been made to solve the above-described problem, and provides a wireless communication apparatus capable of obtaining interference power of a wireless signal transmitted through a channel different from the channel used by the wireless communication apparatus. With the goal.

本発明は、第１のチャネルを用いて通信を行う無線通信装置において、前記第１のチャネルの周波数帯で送信された無線信号を受信する無線信号受信部と、前記無線信号受信部が受信した前記無線信号を復調し、パケットを取得するパケット取得部と、前記パケットに含まれるチャネル情報を取得するチャネル情報取得部と、前記無線信号受信部が受信した前記無線信号と、前記チャネル情報とに基づいて、前記第１のチャネルの周波数と異なる周波数を持つ第２のチャネルで送信された前記無線信号の受信電力を求める干渉電力推定部と、前記第１のチャネルと前記第２のチャネルとのチャネル差と、前記チャネル差と送信電力の減衰量との対応情報であるチャネル減衰情報とに基づいて、該無線信号が送信された送信レベルを推定する送信レベル推定部と、前記送信レベルからの減衰量を示す減衰量情報を変調方式ごとに記憶する記憶部と、を備え、前記干渉電力推定部は、前記送信レベル推定部が推定した前記送信レベルと、前記減衰量情報とに基づいて受信電力を推定することを特徴とする無線通信装置である。 According to the present invention, in a wireless communication apparatus that performs communication using a first channel, a wireless signal receiving unit that receives a wireless signal transmitted in the frequency band of the first channel and the wireless signal receiving unit A packet acquisition unit that demodulates the radio signal and acquires a packet, a channel information acquisition unit that acquires channel information included in the packet, the radio signal received by the radio signal reception unit, and the channel information An interference power estimation unit that obtains reception power of the radio signal transmitted through a second channel having a frequency different from the frequency of the first channel, and the first channel and the second channel, Based on the channel difference and channel attenuation information that is correspondence information between the channel difference and the transmission power attenuation amount, a transmission level for estimating the transmission level at which the radio signal is transmitted is estimated. A level estimation unit; and a storage unit that stores attenuation amount information indicating an attenuation amount from the transmission level for each modulation scheme, and the interference power estimation unit includes the transmission level estimated by the transmission level estimation unit, The wireless communication apparatus is configured to estimate received power based on the attenuation amount information .

また、本発明は、前記第１のチャネルで送信された前記無線信号を復調して取得した前記パケットに基づいて、該無線信号のレプリカを生成するレプリカ生成部を備え、前記無線信号受信部は、受信した前記無線信号から前記レプリカを差し引くことを特徴とする無線通信装置である。   The present invention further includes a replica generation unit that generates a replica of the radio signal based on the packet acquired by demodulating the radio signal transmitted through the first channel, and the radio signal reception unit includes: A wireless communication apparatus, wherein the replica is subtracted from the received wireless signal.

本発明によれば、無線通信装置が使用するチャネルとは異なるチャネルで送信された無線信号の干渉電力を求めることができる。   ADVANTAGE OF THE INVENTION According to this invention, the interference power of the radio signal transmitted with the channel different from the channel which a radio | wireless communication apparatus uses can be calculated | required.

以下、本発明の一実施形態について説明する。図１は本実施形態における無線通信装置の構成を示した図である。無線通信装置は、アンテナ１０と、無線信号受信部１１と、パケット取得部１２と、チャネル情報取得部１３と、送信レベル推定部１４と、干渉電力推定部１５と、レプリカ生成部１６と、記憶部１７とを備える。無線信号受信部１１は、アンテナ１０を介して無線信号を受信する。パケット取得部１１は、無線信号受信部１１が取得した無線信号を復調し、パケットを取得する。チャネル情報取得部１３は、パケット取得部１１が取得したパケットに含まれるチャネル情報を取得する。送信レベル推定部１４は、受信した無線信号の送信レベルを推定する。干渉電力推定部１５は、自身が使用するチャネル以外のチャネルで送信された無線信号の干渉電力を推定する。レプリカ生成部１６は、受信した無線信号のレプリカを生成する。記憶部１７は無線通信装置で用いる情報を記憶する。   Hereinafter, an embodiment of the present invention will be described. FIG. 1 is a diagram illustrating a configuration of a wireless communication apparatus according to the present embodiment. The wireless communication apparatus includes an antenna 10, a wireless signal receiver 11, a packet acquisition unit 12, a channel information acquisition unit 13, a transmission level estimation unit 14, an interference power estimation unit 15, a replica generation unit 16, and a storage Unit 17. The radio signal receiving unit 11 receives a radio signal via the antenna 10. The packet acquisition unit 11 demodulates the radio signal acquired by the radio signal reception unit 11 and acquires a packet. The channel information acquisition unit 13 acquires channel information included in the packet acquired by the packet acquisition unit 11. The transmission level estimation unit 14 estimates the transmission level of the received radio signal. The interference power estimation unit 15 estimates interference power of a radio signal transmitted on a channel other than the channel used by itself. The replica generation unit 16 generates a replica of the received radio signal. The storage unit 17 stores information used in the wireless communication device.

なお、無線信号受信部１１は、スペクトラム拡散（ＤＳＳＳ、Ｄｉｒｅｃｔ Ｓｅｑｕｅｎｃｅ Ｓｐｒｅａｄ−Ｓｐｅｃｔｒｕｍ）方式で送信された無線信号を受信する。また、無線信号受信部１１は、スペクトラム拡散方式以外で送信された無線信号を受信することができてもよい。例えば、ＯＦＤＭ（Ｏｒｔｈｏｇｏｎａｌ Ｆｒｅｑｕｅｎｃｙ Ｄｉｖｉｓｉｏｎ Ｍｕｌｔｉｐｌｅｘｉｎｇ）方式で送信された無線信号を受信することができてもよい。   The radio signal receiving unit 11 receives a radio signal transmitted by a spread spectrum (DSSS, Direct Sequence Spread-Spectrum) method. Further, the wireless signal receiving unit 11 may be able to receive a wireless signal transmitted by a method other than the spread spectrum method. For example, it may be possible to receive a radio signal transmitted by an OFDM (Orthogonal Frequency Division Multiplexing) scheme.

スペクトラム拡散方式は、ＩＥＥＥ８０２．１１ｂ／ｇやｃｄｍａシステムで用いられている。また、スペクトラム拡散方式を用いる無線通信装置は、無線通信装置が使用するチャネル（第１のチャネル）とは異なるチャネル（第２のチャネル）で送信されたスペクトラム拡散方式信号を正常に復調可能であり、また、第２のチャネルで送信された無線信号の受信電力は第1のチャネルで送信された信号への干渉電力となる。   The spread spectrum system is used in IEEE 802.11b / g and cdma systems. In addition, a wireless communication apparatus using the spread spectrum method can normally demodulate a spread spectrum signal transmitted on a channel (second channel) different from the channel (first channel) used by the wireless communication apparatus. In addition, the reception power of the radio signal transmitted through the second channel is interference power with respect to the signal transmitted through the first channel.

また、第２のチャネルで送信された無線信号の送信電力（送信レベル）は同一でも、第１のチャネルと第２のチャネルとのチャネル差が大きくなるに従い、無線通信装置で受信する第２のチャネルで送信された信号の受信電力は小さくなる。また、チャネルの差と受信電力の減衰量とは関連づいている。本実施形態では、記憶部１７は、チャネルの差と受信電力の減衰量との関連を示すチャネル減衰情報を予め記憶している。これにより、第１のチャネルと第２のチャネルとのチャネル差と、チャネル減衰情報と、無線信号の受信電力とが分かれば、この無線信号の送信レベル（送信電力）を推定することができる。本実施形態ではこの性質に基づいて、送信レベル推定部１４は、第２のチャネルで送信された無線信号の送信レベルを推定する。   Further, even if the transmission power (transmission level) of the radio signal transmitted through the second channel is the same, the second signal received by the radio communication device increases as the channel difference between the first channel and the second channel increases. The received power of the signal transmitted through the channel is reduced. Further, the channel difference and the attenuation amount of the received power are associated with each other. In the present embodiment, the storage unit 17 stores in advance channel attenuation information indicating the relationship between channel differences and received power attenuation. Thus, if the channel difference between the first channel and the second channel, channel attenuation information, and the reception power of the radio signal are known, the transmission level (transmission power) of this radio signal can be estimated. In the present embodiment, based on this property, the transmission level estimation unit 14 estimates the transmission level of the radio signal transmitted on the second channel.

図２は、ＩＥＥＥ８０２．１１におけるＤＳＳＳとＯＦＤＭのスペクトラムを示した図である。本図は、同一の送信電力で無線信号を送信した場合での各変調方式でのスペクトラムを示している。スペクトラム２１はＤＳＳＳのスペクトラムを示している。スペクトル２２はＯＦＤＭのスペクトラムを示している。スペクトラムマスク２３はＤＳＳＳのスペクトラムマスクを示している。スペクトラムマスク２４はＯＦＤＭのスペクトラムマスクを示している。   FIG. 2 is a diagram showing the spectrum of DSSS and OFDM in IEEE 802.11. This figure has shown the spectrum by each modulation system at the time of transmitting a radio signal with the same transmission power. A spectrum 21 indicates the spectrum of DSSS. A spectrum 22 represents an OFDM spectrum. A spectrum mask 23 is a DSSS spectrum mask. A spectrum mask 24 represents an OFDM spectrum mask.

図示するように、同一の送信電力で無線信号を送信した場合においても、無線通信装置が使用するフィルタや変調方式が異なると、受信チャネルごとに受信電力の減衰量が異なる。この減衰量は変調方式ごとに決まる値である。本実施形態では、記憶部１７は、変調方式と受信電力の減少量との関連を示す減衰量情報を予め記憶している。これにより、無線信号の送信レベルと減衰量情報とがわかれば、受信電力（干渉電力）を推定することができる。本実施形態ではこの性質に基づいて、送信レベル推定部１４が推定した送信レベルと、記憶部１７が変調方式ごとに記憶する減衰量情報とに基づいて、干渉電力推定部１５は受信電力（干渉電力）を変調方式ごとに推定する。   As shown in the figure, even when radio signals are transmitted with the same transmission power, the amount of attenuation of received power differs for each reception channel if the filter and modulation method used by the wireless communication apparatus are different. This attenuation is a value determined for each modulation method. In the present embodiment, the storage unit 17 stores in advance attenuation amount information indicating the relationship between the modulation method and the amount of decrease in received power. Thereby, if the transmission level and attenuation amount information of the radio signal are known, the received power (interference power) can be estimated. In the present embodiment, based on this property, the interference power estimation unit 15 determines the received power (interference power) based on the transmission level estimated by the transmission level estimation unit 14 and the attenuation amount information stored for each modulation scheme by the storage unit 17. Power) is estimated for each modulation method.

次に、本発明の具体的な動作について説明する。
（第１の具体例）
はじめに、第１の具体例について説明する。本具体例では、無線通信装置が使用するチャネル（第１のチャネル）とは異なるチャネル（第２のチャネル）で送信された無線信号を無線通信装置が受信した例を説明する。 Next, a specific operation of the present invention will be described.
(First specific example)
First, a first specific example will be described. In this specific example, an example will be described in which the wireless communication device receives a wireless signal transmitted through a channel (second channel) different from the channel (first channel) used by the wireless communication device.

（ステップＳ１０１）無線信号受信部１１は、無線信号を受信する。その後、ステップＳ１０２に進む。
（ステップＳ１０２）パケット取得部１２は、無線信号受信部１１が受信した無線信号を復調し、パケットを取得する。その後、ステップＳ１０３に進む。
（ステップＳ１０３）チャネル情報取得部１３は、パケット取得部１２が取得したパケットからチャネル情報「第２のチャネル」を取得する。その後、ステップＳ１０４に進む。 (Step S101) The radio signal receiving unit 11 receives a radio signal. Thereafter, the process proceeds to step S102.
(Step S102) The packet acquisition unit 12 demodulates the radio signal received by the radio signal reception unit 11 and acquires a packet. Thereafter, the process proceeds to step S103.
(Step S <b> 103) The channel information acquisition unit 13 acquires channel information “second channel” from the packet acquired by the packet acquisition unit 12. Thereafter, the process proceeds to step S104.

（ステップＳ１０４）干渉電力推定部１５は、チャネル情報取得部１３が取得したチャネル情報「第２のチャネル」と、無線信号受信部１１が取得した無線信号の受信電力とに基づいて、干渉電力を推定する。本無線通信装置が使用するチャネルは「第１のチャネル」である。ステップＳ１０３でチャネル情報取得部１３が取得したチャネル情報は「第２のチャネル」である。よって、チャネル情報に基づいて、干渉電力推定部１５はステップＳ１０１で受信した無線信号は干渉信号であると判断する。また、干渉電力推定部１５は、ステップＳ１０１で受信した無線信号の受信電力を干渉電力と推定する。その後、処理を終了する。
これにより、無線通信装置は干渉電力を求めることができる。 (Step S104) The interference power estimation unit 15 calculates interference power based on the channel information “second channel” acquired by the channel information acquisition unit 13 and the reception power of the radio signal acquired by the radio signal reception unit 11. presume. The channel used by the wireless communication apparatus is the “first channel”. The channel information acquired by the channel information acquisition unit 13 in step S103 is “second channel”. Therefore, based on the channel information, the interference power estimation unit 15 determines that the radio signal received in step S101 is an interference signal. Further, the interference power estimation unit 15 estimates the reception power of the radio signal received in step S101 as interference power. Thereafter, the process ends.
Thereby, the wireless communication apparatus can obtain the interference power.

（第２の具体例）
次に、第２の具体例について説明する。本具体例では、第１の具体例で受信した無線信号が送信された変調方式とは異なる変調方式で無線信号が送信された場合の干渉電力を求める例を説明する。 (Second specific example)
Next, a second specific example will be described. In this specific example, an example will be described in which interference power is obtained when a radio signal is transmitted with a modulation scheme different from the modulation scheme with which the radio signal received in the first specific example is transmitted.

（ステップＳ２０１）無線信号受信部１１は、無線信号を受信する。その後、ステップＳ２０２に進む。
（ステップＳ２０２）パケット取得部１２は、無線信号受信部１１が受信した無線信号を復調し、パケットを取得する。その後、ステップＳ２０３に進む。
（ステップＳ２０３）チャネル情報取得部１３は、パケット取得部１２が取得したパケットからチャネル情報「第２のチャネル」を取得する。その後、ステップＳ２０４に進む。 (Step S201) The radio signal receiving unit 11 receives a radio signal. Thereafter, the process proceeds to step S202.
(Step S202) The packet acquisition unit 12 demodulates the radio signal received by the radio signal reception unit 11 and acquires a packet. Thereafter, the process proceeds to step S203.
(Step S <b> 203) The channel information acquisition unit 13 acquires channel information “second channel” from the packet acquired by the packet acquisition unit 12. Thereafter, the process proceeds to step S204.

（ステップＳ２０４）送信レベル推定部１４は、自無線通信装置が使用するチャネル「第１のチャネル」と、チャネル情報取得部１３が取得したチャネル情報「第２のチャネル」とのチャネル差を算出する。続いて、記憶部１７が記憶するチャネル差と送信電力の減衰量との対応情報であるチャネル減衰情報に基づいて、ステップＳ２０１で受信した無線信号の送信レベルを推定する。その後、ステップＳ２０５に進む。   (Step S <b> 204) The transmission level estimation unit 14 calculates a channel difference between the channel “first channel” used by the own wireless communication device and the channel information “second channel” acquired by the channel information acquisition unit 13. . Subsequently, the transmission level of the radio signal received in step S201 is estimated based on channel attenuation information that is correspondence information between the channel difference stored in the storage unit 17 and the attenuation amount of transmission power. Thereafter, the process proceeds to step S205.

（ステップＳ２０５）干渉電力推定部１５は、記憶部１７が記憶する変調方式と受信電力の減衰量との対応情報である減衰量情報と、ステップＳ２０４で推定した送信レベルとに基づいて、干渉電力を変調方式ごとに推定する。その後、処理を終了する。
これにより、無線通信装置は、様々な変調方式で無線信号が送信された場合の干渉電力を求めることができる。 (Step S205) The interference power estimation unit 15 determines the interference power based on the attenuation amount information that is correspondence information between the modulation scheme stored in the storage unit 17 and the attenuation amount of the received power, and the transmission level estimated in step S204. Is estimated for each modulation scheme. Thereafter, the process ends.
Thereby, the wireless communication apparatus can obtain the interference power when the wireless signal is transmitted by various modulation schemes.

（第３の具体例）
次に、第３の具体例について説明する。本具体例では、無線通信装置が使用するチャネル（第１のチャネル）で送信された無線信号と、第１のチャネルとは異なるチャネル（第２のチャネル）で送信された無線信号とが干渉した無線信号を無線通信装置が受信した例を説明する。 (Third example)
Next, a third specific example will be described. In this specific example, a radio signal transmitted through a channel (first channel) used by the wireless communication apparatus interferes with a radio signal transmitted through a channel (second channel) different from the first channel. An example in which a wireless signal is received by a wireless communication device will be described.

（ステップＳ３０１）無線信号受信部１１は、第１のチャネルで送信された無線信号と第２のチャネルで送信された無線信号とが干渉した無線信号を受信する。その後、ステップＳ３０２に進む。
（ステップＳ３０２）パケット取得部１２は、無線信号受信部１１が受信した無線信号を復調し、第１のチャネルで送信されたパケットを取得する。その後、ステップＳ３０３に進む。 (Step S301) The radio signal receiving unit 11 receives a radio signal in which a radio signal transmitted through the first channel interferes with a radio signal transmitted through the second channel. Thereafter, the process proceeds to step S302.
(Step S302) The packet acquisition unit 12 demodulates the radio signal received by the radio signal reception unit 11, and acquires a packet transmitted through the first channel. Thereafter, the process proceeds to step S303.

（ステップＳ３０３）レプリカ生成部１６は、パケット取得部１２が取得した第１のチャネルで送信されたパケットを変調し、レプリカを生成する。その後、ステップＳ３０４に進む。
（ステップＳ３０４）無線信号受信部１１は、第１のチャネルで送信された無線信号と第２のチャネルで送信された無線信号とが干渉した無線信号から、レプリカ生成部１６が生成したレプリカを差し引く。これにより、第２のチャネルで送信された無線信号を取得することができる。その後、ステップＳ３０５に進む。 (Step S303) The replica generation unit 16 modulates the packet transmitted on the first channel acquired by the packet acquisition unit 12, and generates a replica. Thereafter, the process proceeds to step S304.
(Step S304) The radio signal reception unit 11 subtracts the replica generated by the replica generation unit 16 from the radio signal in which the radio signal transmitted through the first channel interferes with the radio signal transmitted through the second channel. . Thereby, the radio signal transmitted on the second channel can be acquired. Thereafter, the process proceeds to step S305.

（ステップＳ３０５）ステップＳ３０４で取得した無線信号に基づいて、第１の具体例のステップＳ１０２〜ステップＳ１０４の処理、または、第２の具体例のステップＳ２０２〜ステップＳ２０５の処理と同様の処理を行い、干渉電力を求める。その後、処理を終了する。
これにより、無線通信装置はより正確な干渉電力を求めることができる。 (Step S305) Based on the radio signal acquired in step S304, the same processing as the processing of step S102 to step S104 of the first specific example or the processing of step S202 to step S205 of the second specific example is performed. Find the interference power. Thereafter, the process ends.
Thereby, the wireless communication apparatus can obtain more accurate interference power.

上述したとおり、本実施形態によれば、無線通信装置は、自身が使用する第１のチャネルとは異なる第２のチャネルで送信された無線信号の受信電力（干渉電力）を推定することができる。また、無線通信装置は、様々な変調方式で無線信号が送信された場合の干渉電力を求めることができる。また、第１のチャネルで送信された無線信号と第２のチャネルで送信された無線信号とが干渉した無線信号を無線通信装置が受信した場合においても、無線通信装置は、第２のチャネルで送信された無線信号のみを取得することができ、第２のチャネルで送信された無線信号の干渉電力を推定することができる。   As described above, according to the present embodiment, the wireless communication apparatus can estimate the received power (interference power) of a wireless signal transmitted on a second channel different from the first channel used by itself. . In addition, the wireless communication apparatus can obtain interference power when a wireless signal is transmitted with various modulation schemes. Further, even when the wireless communication device receives a wireless signal in which the wireless signal transmitted on the first channel interferes with the wireless signal transmitted on the second channel, the wireless communication device is not connected to the second channel. Only the transmitted radio signal can be acquired, and the interference power of the radio signal transmitted on the second channel can be estimated.

また、干渉電力推定部１５は、第２のチャネルの干渉電力と、単位時間当たりに無線パケットが送信される時間の比を示す無線占有率とに基づいて、第１のチャネルが受ける平均干渉電力を求めることができる。また、第２のチャネルとして複数のチャネルが存在する場合、各チャネルにおける平均干渉電力を求め、複数のチャネルの平均干渉電力を足し合わせることで、第１のチャネルが受ける平均干渉電力を求めることができる。また、干渉電力推定部１５は、第２のチャネルの送信時間率を求め、第１のチャネルが受ける干渉電力の時間率を求めることができる。   In addition, the interference power estimation unit 15 determines the average interference power received by the first channel based on the interference power of the second channel and the radio occupation ratio indicating the ratio of the time at which radio packets are transmitted per unit time. Can be requested. Further, when there are a plurality of channels as the second channel, the average interference power in each channel is obtained, and the average interference power received by the first channel is obtained by adding the average interference power of the plurality of channels. it can. Also, the interference power estimation unit 15 can determine the transmission time rate of the second channel and the time rate of the interference power received by the first channel.

以上、この発明の実施形態について図面を参照して詳述してきたが、具体的な構成はこの実施形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計等も含まれる。   The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

本発明の一実施形態における無線通信装置の構成を示した図である。It is the figure which showed the structure of the radio | wireless communication apparatus in one Embodiment of this invention. ＩＥＥＥ８０２．１１におけるＤＳＳＳとＯＦＤＭのスペクトラムを示した図である。It is the figure which showed the spectrum of DSSS and OFDM in IEEE802.11. 本実施形態における無線通信装置の手順を示したフローチャートである。It is the flowchart which showed the procedure of the radio | wireless communication apparatus in this embodiment. 本実施形態における無線通信装置の手順を示したフローチャートである。It is the flowchart which showed the procedure of the radio | wireless communication apparatus in this embodiment. 本実施形態における無線通信装置の手順を示したフローチャートである。It is the flowchart which showed the procedure of the radio | wireless communication apparatus in this embodiment.

符号の説明Explanation of symbols

１０・・・アンテナ、１１・・・無線信号受信部、１２・・・パケット取得部、１３・・・チャネル情報取得部、１４・・・送信レベル推定部、１５・・・干渉電力推定部、１６・・・レプリカ生成部、１７・・・記憶部 DESCRIPTION OF SYMBOLS 10 ... Antenna, 11 ... Radio signal receiving part, 12 ... Packet acquisition part, 13 ... Channel information acquisition part, 14 ... Transmission level estimation part, 15 ... Interference power estimation part, 16 ... replica generation unit, 17 ... storage unit

Claims (2)

第１のチャネルを用いて通信を行う無線通信装置において、
前記第１のチャネルの周波数帯で送信された無線信号を受信する無線信号受信部と、
前記無線信号受信部が受信した前記無線信号を復調し、パケットを取得するパケット取得部と、
前記パケットに含まれるチャネル情報を取得するチャネル情報取得部と、
前記無線信号受信部が受信した前記無線信号と、前記チャネル情報とに基づいて、前記第１のチャネルの周波数と異なる周波数を持つ第２のチャネルで送信された前記無線信号の受信電力を求める干渉電力推定部と、
前記第１のチャネルと前記第２のチャネルとのチャネル差と、前記チャネル差と送信電力の減衰量との対応情報であるチャネル減衰情報とに基づいて、該無線信号が送信された送信レベルを推定する送信レベル推定部と、
前記送信レベルからの減衰量を示す減衰量情報を変調方式ごとに記憶する記憶部と、
を備え、
前記干渉電力推定部は、前記送信レベル推定部が推定した前記送信レベルと、前記減衰量情報とに基づいて受信電力を推定する
ことを特徴とする無線通信装置。 In a wireless communication apparatus that performs communication using a first channel,
A radio signal receiving unit for receiving a radio signal transmitted in the frequency band of the first channel;
A packet acquisition unit that demodulates the radio signal received by the radio signal reception unit and acquires a packet;
A channel information acquisition unit for acquiring channel information included in the packet;
Based on the radio signal received by the radio signal receiver and the channel information, interference for obtaining reception power of the radio signal transmitted through a second channel having a frequency different from the frequency of the first channel. A power estimation unit;
Based on the channel difference between the first channel and the second channel, and channel attenuation information that is correspondence information between the channel difference and transmission power attenuation, the transmission level at which the radio signal is transmitted is determined. A transmission level estimation unit to be estimated;
A storage unit for storing attenuation amount information indicating an attenuation amount from the transmission level for each modulation method;
With
The interference power estimation unit estimates received power based on the transmission level estimated by the transmission level estimation unit and the attenuation amount information.
A wireless communication apparatus. 前記第１のチャネルで送信された前記無線信号を復調して取得した前記パケットに基づいて、該無線信号のレプリカを生成するレプリカ生成部
を備え、
前記無線信号受信部は、受信した前記無線信号から前記レプリカを差し引く
ことを特徴とする請求項１に記載の無線通信装置。 A replica generation unit that generates a replica of the radio signal based on the packet acquired by demodulating the radio signal transmitted on the first channel;
The wireless communication device according to claim 1, wherein the wireless signal receiving unit subtracts the replica from the received wireless signal.
JP2008200697A 2008-08-04 2008-08-04 Wireless communication device Expired - Fee Related JP5119079B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008200697A JP5119079B2 (en) 2008-08-04 2008-08-04 Wireless communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008200697A JP5119079B2 (en) 2008-08-04 2008-08-04 Wireless communication device

Publications (2)

Publication Number Publication Date
JP2010041290A JP2010041290A (en) 2010-02-18
JP5119079B2 true JP5119079B2 (en) 2013-01-16

Family

ID=42013376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008200697A Expired - Fee Related JP5119079B2 (en) 2008-08-04 2008-08-04 Wireless communication device

Country Status (1)

Country Link
JP (1) JP5119079B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7340367B2 (en) * 2019-06-28 2023-09-07 パナソニックホールディングス株式会社 Base station and notification method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001044930A (en) * 1999-07-30 2001-02-16 Matsushita Electric Ind Co Ltd Device and method for radio communication
JP3915021B2 (en) * 2001-10-12 2007-05-16 日本電気株式会社 Channel selection method
JP4578376B2 (en) * 2004-09-30 2010-11-10 株式会社エヌ・ティ・ティ・ドコモ Signal separation device
JP2008067121A (en) * 2006-09-08 2008-03-21 Iwatsu Electric Co Ltd Automatic channel determination method and apparatus

Also Published As

Publication number Publication date
JP2010041290A (en) 2010-02-18

Similar Documents

Publication Publication Date Title
JP5024934B2 (en) Wireless communication device
US8626216B2 (en) Transmission and reception bandwidth setting method, mobile terminal and base station in radio communication system that defines a plurality of signal bandwidths
EP2476275B1 (en) Adjusting sensing rate of wireless transmissions from a licensed user in a cognitive radio system
US8243779B2 (en) Method of quality-based frequency hopping in a wirelesscommunication system
US20120164950A1 (en) Cognitive Radio Transmission
US8509289B2 (en) Relay device and wireless relay method
KR101467300B1 (en) Facilitating noise estimation in wireless communication
US20230031794A1 (en) Selection of decoding level at signal forwarding devices
KR101517241B1 (en) Method of selecting relay station
KR20190027654A (en) Method and apparatus for wireless communication considering collisions among device to device transmissions
KR20090088086A (en) Apparatus and method for power control in distributed antenna system
EP1170974B1 (en) Base station device, communication terminal, and communication method
EP3254422B1 (en) Management and mitigation of narrowband interference
JP5172302B2 (en) Modulation method selection method for base station apparatus and base station apparatus using the same
JP5119079B2 (en) Wireless communication device
US11177871B2 (en) Control signaling for the relay scenarios
JP5198993B2 (en) Wireless communication method and wireless base station
JP5164746B2 (en) Wireless communication method and wireless communication base station
JP5474007B2 (en) Transmission / reception bandwidth setting method in wireless communication system defining multiple signal bandwidths
JP7299030B2 (en) Wireless base station and wireless communication method
JP2009055546A (en) Mobile communication system and mobile radio terminal device
KR20100084739A (en) Method and apparatus for detecting channel quality information in communication system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20110131

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20110201

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120622

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120703

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120903

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20120904

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20120925

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20121022

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151026

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees