JP2010268115A - Reception gain control method, program, and reception gain control device - Google Patents
Reception gain control method, program, and reception gain control device Download PDFInfo
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本発明は、広帯域な周波数帯の受信信号に含まれる所望の無線通信方式の信号が復調処理に適した電力レベルになるように電力利得を制御する受信利得制御方法、プログラム、および受信利得制御装置に関する。 The present invention relates to a reception gain control method, a program, and a reception gain control apparatus for controlling a power gain so that a signal of a desired wireless communication method included in a reception signal in a wide frequency band has a power level suitable for demodulation processing. About.
図６は、従来の無線通信システムにおける受信利得制御方法の概略を説明するためのブロック図である。ＲＦフロントエンド部２−２は、受信信号２−１に対して、受信利得制御や、ダウンコンバートなどを行った後、アナログベースバンド信号をＡＤ変換回路２−３に出力する。ＡＤ変換回路２−３は、アナログベースバンド信号のＡＤ変換を行い、ディジタルベースバンド信号を復調処理回路２−４に出力する。 FIG. 6 is a block diagram for explaining an outline of a reception gain control method in a conventional wireless communication system. The RF front end unit 2-2 performs reception gain control, down-conversion, and the like on the reception signal 2-1, and then outputs an analog baseband signal to the AD conversion circuit 2-3. The AD conversion circuit 2-3 performs AD conversion of the analog baseband signal and outputs the digital baseband signal to the demodulation processing circuit 2-4.
復調処理回路２−４は、ディジタル信号処理により復調を行い、復調後のデータ２−６を出力するとともに、復調時の受信電力のレベルを測定し、ＲＦフロントエンド部２−２に対して、受信電力の利得制御のためのＲＦフロントエンド部利得制御信号２−５を供給する。このＲＦフロントエンド部利得制御信号２−５に基づき、ＲＦフロントエンド部２−２は、受信信号２−１の電力の強弱に対して利得調整を行う。 The demodulation processing circuit 2-4 performs demodulation by digital signal processing, outputs demodulated data 2-6, measures the level of received power at the time of demodulation, and outputs to the RF front end unit 2-2 An RF front end gain control signal 2-5 for gain control of received power is supplied. Based on the RF front-end unit gain control signal 2-5, the RF front-end unit 2-2 performs gain adjustment with respect to the power level of the reception signal 2-1.
このような利得制御を行う技術として、特許文献１および特許文献２の技術が開示されている。
As techniques for performing such gain control, the techniques of
しかしながら、上述した従来技術による無線通信システムにおける受信利得制御では、様々な無線通信方式の信号を含む広帯域な周波数帯の電波を一括して受信する場合、ＲＦフロントエンド部２−２で広帯域な周波数帯の電波に対して一括して利得制御を行うため、広帯域な周波数帯に含まれ、利用する周波数帯の異なる各無線通信方式の信号の受信電力に強弱があると、無線通信方式毎に適切な利得制御を行うことはできないという問題がある。 However, in the reception gain control in the wireless communication system according to the above-described prior art, when receiving radio waves in a wide frequency band including signals of various wireless communication systems at once, the RF front end unit 2-2 has a wide frequency range. Since the gain control is performed collectively for the radio waves in the band, it is appropriate for each radio communication system if the received power of the signal of each radio communication system that is included in a wide frequency band and that uses different frequency bands is strong or weak There is a problem that it is not possible to perform a proper gain control.
この場合、ＲＦフロントエンド部２−２のアナログ回路の受信特性が飽和しないように、強い受信電力の無線通信方式を基準に対して利得制御が行われるため、同時に受信した弱い受信電力の無線通信方式に対しては、適切な利得制御が行われず、弱い受信電力の無線通信方式の信号を復調することが困難になるという問題があった。 In this case, since the gain control is performed based on the wireless communication system with strong reception power so that the reception characteristic of the analog circuit of the RF front end unit 2-2 is not saturated, the wireless communication with weak reception power simultaneously received. For the system, there is a problem that appropriate gain control is not performed and it is difficult to demodulate a signal of a wireless communication system with weak reception power.
本発明は、このような事情を考慮してなされたものであり、その目的は、広帯域な周波数帯の受信信号に含まれる多様な無線プロトコル毎に、受信電力の利得を適切に制御することができる受信利得制御方法、プログラム、および受信利得制御装置を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is to appropriately control the gain of received power for each of various wireless protocols included in a received signal in a wide frequency band. An object of the present invention is to provide a receiving gain control method, a program, and a receiving gain control device.
上述した課題を解決するために、本発明は、一括して受信した、様々な無線通信方式の信号を含む広帯域な周波数帯の受信信号に対して、前記様々な無線通信方式の信号の復調を行う際に、前記受信した広帯域な周波数帯の受信信号の利得を制御する受信利得制御方法であって、広帯域な周波数帯の電波を受信するステップと、前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により特定の周波数帯の帯域制限信号を抽出するステップと、前記抽出された帯域制限信号に含まれる所望の無線通信方式の復調処理に適した電力レベルになるように、前記帯域制限信号の電力利得を制御するステップとからなる利得制御ステップを含むことを特徴とする受信利得制御方法である。 In order to solve the above-described problems, the present invention performs demodulation of signals of various wireless communication schemes on received signals in a wide frequency band including signals of various wireless communication schemes that are collectively received. A reception gain control method for controlling the gain of the received signal in the wideband frequency band when performing a step of receiving radio waves in the wideband frequency band, and a bandpass from the received signal in the wideband frequency band A step of extracting a band-limited signal of a specific frequency band by filtering, and the power of the band-limited signal so that the power level is suitable for demodulation processing of a desired wireless communication method included in the extracted band-limited signal. And a gain control step including a step of controlling a power gain.
本発明は、上記の発明において、前記利得制御ステップは、前記バンドパスフィルタ処理後の帯域制限信号を蓄積するステップと、前記蓄積した帯域制限信号を読み出し、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算し、相互相関値を算出するステップと、前記算出された相互相関値に基づき、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれているか否かを判定するステップと、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれていると判定された場合、前記相互相関値に基づき、前記帯域制限信号の電力利得を適切に制御するための利得制御値を算出するステップと、前記蓄積した帯域制限信号を読み出し、前記算出された利得制御値に基づき、帯域制限信号の電力利得を制御するステップとを含むことを特徴とする。 According to the present invention, in the above invention, the gain control step includes a step of accumulating the band-limited signal after the band-pass filter processing, and reading out the accumulated band-limited signal and including it in a data frame of a desired wireless communication system Multiplying a known preamble pattern to calculate a cross-correlation value, and based on the calculated cross-correlation value, whether or not a data frame of a desired wireless communication scheme is included in the band limited signal And when it is determined that a data frame of a desired wireless communication system is included in the band limited signal, the power gain of the band limited signal is appropriately controlled based on the cross-correlation value. Calculating a gain control value for reading, and reading the accumulated band limit signal, and based on the calculated gain control value Characterized in that it comprises the steps of controlling the power gain of the signal.
本発明は、上記の発明において、前記利得制御ステップは、所望の無線通信方式として、周波数偏移変調方式の復調を行う場合、前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する高周波数と低周波数とのそれぞれの帯域制限信号を抽出するステップと、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを前記それぞれの帯域制限信号と乗算し、高周波数の相互相関値と低周波数の相互相関値とを算出するステップと、前記算出された高周波数の相互相関値と低周波数の相互相関値とを加算することにより、前記利得制御値を算出するための最終的な相互相関値を計算するステップとを更に含むことを特徴とする。 According to the present invention, in the above invention, when the gain control step performs demodulation of a frequency shift modulation method as a desired radio communication method, the gain shift step performs frequency shift by bandpass filter processing from the received signal in the wide frequency band. Extracting each band-limited signal of high frequency and low frequency used in the modulation scheme, separating a known preamble pattern included in a data frame of a desired wireless communication scheme into a high frequency and a low frequency, Multiplying the respective band-limited signals by the separated preamble patterns to calculate a high-frequency cross-correlation value and a low-frequency cross-correlation value; and calculating the calculated high-frequency cross-correlation value and the low-frequency cross-correlation value. Calculating a final cross-correlation value for calculating the gain control value by adding the correlation value. And wherein the door.
また、上述した課題を解決するために、本発明は、一括して受信した、様々な無線通信方式の信号を含む広帯域な周波数帯の受信信号に対して、前記様々な無線通信方式の信号の復調を行う際に、前記受信した広帯域な周波数帯の受信信号の利得を制御する受信利得制御装置を制御するコンピュータに、前記広帯域な周波数帯の受信信号から特定の周波数帯の帯域制限信号を抽出するバンドパスフィルタ処理機能、前記バンドパスフィルタ処理機能により抽出された前記帯域制限信号を蓄積する信号蓄積機能、前記信号蓄積機能により蓄積された前記帯域制限信号を読み出し、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算し、相互相関値を算出する相関値算出機能、前記算出された相互相関値に基づき、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれているか否かを判定するデータ有無判定機能、前記データ有無判定機能により、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれていると判定された場合、前記相関値算出機能により算出された相互相関値に基づき、前記帯域制限信号の電力利得を適切に制御するための利得制御値を計算する利得制御値算出機能、前記信号蓄積機能により蓄積された前記帯域制限信号を読み出し、前記利得制御値算出機能より算出された利得制御値に基づき、前記帯域制限信号の電力利得を制御する利得制御機能を実行させることを特徴とするプログラムである。 Further, in order to solve the above-described problem, the present invention relates to signals of various wireless communication schemes with respect to received signals in a wide frequency band including signals of various wireless communication schemes received collectively. When performing demodulation, extract a band-limited signal in a specific frequency band from the received signal in the wideband frequency band to a computer that controls the reception gain control device that controls the gain of the received signal in the wideband frequency band A band pass filter processing function, a signal storage function for storing the band limited signal extracted by the band pass filter processing function, reading the band limited signal stored by the signal storage function, and data of a desired wireless communication system A correlation value calculation function for calculating a cross-correlation value by multiplying with a known preamble pattern included in the frame, based on the calculated cross-correlation value A data presence / absence determination function for determining whether or not a data frame of a desired wireless communication system is included in the band limited signal, and the data presence / absence determination function allows a data frame of a desired wireless communication system to be Gain control value for calculating a gain control value for appropriately controlling the power gain of the band-limited signal based on the cross-correlation value calculated by the correlation value calculation function. A value calculation function, reading the band limit signal stored by the signal storage function, and executing a gain control function for controlling the power gain of the band limit signal based on the gain control value calculated by the gain control value calculation function It is a program characterized by making it carry out.
本発明は、上記の発明において、所望の無線通信方式として、周波数偏移変調方式の復調を行う場合、前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する高周波数の帯域制限信号を抽出する高周波用バンドパスフィルタ処理機能、前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する低周波数の帯域制限信号を抽出する低周波用バンドパスフィルタ処理機能、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを、前記高周波用バンドパスフィルタ処理機能により抽出された前記高周波数の帯域制限信号と乗算し、高周波数の相互相関値を算出する高周波数用相関値算出機能、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを、前記低周波用バンドパスフィルタ処理機能により抽出された前記低周波数の帯域制限信号と乗算し、低周波数の相互相関値を算出する低周波数用相関値算出機能とを更に実行させ、前記相関値算出機能は、前記高周波数用相関値算出機能により算出された高周波数の相互相関値と前記低周波数用相関値算出機能により算出された低周波数の相互相関値とを加算することにより、前記利得制御値を算出するための最終的な相互相関値を計算することを特徴とする。 In the above invention, the present invention provides a high frequency band modulation method that uses a wideband frequency received signal by bandpass filtering when demodulating a frequency shift modulation method as a desired radio communication method. High-frequency band-pass filter processing function for extracting frequency band-limited signals, Low-frequency band-pass signals used for frequency shift modulation by band-pass filter processing from received signals in the wide frequency band A band pass filter processing function, a known preamble pattern included in a data frame of a desired wireless communication system is separated into a high frequency and a low frequency, and the separated preamble pattern is extracted by the high frequency band pass filter processing function The high frequency band limit signal is multiplied to calculate a high frequency cross-correlation value. Correlation value calculation function for wave number, a known preamble pattern included in a data frame of a desired wireless communication system is separated into a high frequency and a low frequency, and the separated preamble pattern is obtained by the band pass filter processing function for low frequency A low-frequency correlation value calculating function for multiplying the extracted low-frequency band-limited signal and calculating a low-frequency cross-correlation value; and the correlation value calculating function calculates the high-frequency correlation value By adding the high-frequency cross-correlation value calculated by the function and the low-frequency cross-correlation value calculated by the low-frequency correlation value calculation function, a final mutual control for calculating the gain control value is obtained. A correlation value is calculated.
また、上述した課題を解決するために、本発明は、一括して受信した、様々な無線通信方式の信号を含む広帯域な周波数帯の受信信号に対して、前記様々な無線通信方式の信号の復調を行う際に、前記受信した広帯域な周波数帯の受信信号の利得を制御する受信利得制御装置であって、前記広帯域な周波数帯の受信信号から特定の周波数帯の帯域制限信号を抽出するバンドパスフィルタ処理回路と、前記バンドパスフィルタ処理回路により抽出された前記帯域制限信号を蓄積する信号蓄積回路と、前記信号蓄積回路に蓄積された前記帯域制限信号を読み出し、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算し、相互相関値を算出する相関値算出回路と、前記算出された相互相関値に基づき、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれているか否かを判定するデータ有無判定回路と、前記データ有無判定回路により、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれていると判定された場合、前記相関値算出回路で算出された相互相関値に基づき、前記帯域制限信号の電力利得を適切に制御するための利得制御値を計算する利得制御値算出回路と、前記信号蓄積回路に蓄積された前記帯域制限信号を読み出し、前記利得制御値算出回路で算出された利得制御値に基づき、前記帯域制限信号の電力利得を制御する利得制御回路とを備えたことを特徴とする受信利得制御装置である。 Further, in order to solve the above-described problem, the present invention relates to signals of various wireless communication schemes with respect to received signals in a wide frequency band including signals of various wireless communication schemes received collectively. A reception gain control device for controlling a gain of a received signal in a wide frequency band when the demodulation is performed, wherein a band-limited signal in a specific frequency band is extracted from the received signal in the wide frequency band A pass filter processing circuit; a signal storage circuit for storing the band limited signal extracted by the band pass filter processing circuit; and reading the band limited signal stored in the signal storage circuit to obtain data of a desired wireless communication system A correlation value calculation circuit that multiplies a known preamble pattern included in the frame to calculate a cross-correlation value, and a desired wireless communication based on the calculated cross-correlation value. A data presence / absence determination circuit for determining whether or not a data frame of a scheme is included in the band limited signal, and a data frame of a desired wireless communication scheme in the band limited signal by the data presence / absence determination circuit A gain control value calculation circuit that calculates a gain control value for appropriately controlling the power gain of the band limited signal based on the cross-correlation value calculated by the correlation value calculation circuit when it is determined to be included And a gain control circuit that reads out the band limit signal stored in the signal storage circuit and controls the power gain of the band limit signal based on the gain control value calculated by the gain control value calculation circuit. This is a reception gain control device.
本発明は、上記の発明において、所望の無線通信方式として、周波数偏移変調方式の復調を行う場合、前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する高周波数の帯域制限信号を抽出する高周波用バンドパスフィルタ処理回路と、前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する低周波数の帯域制限信号を抽出する低周波用バンドパスフィルタ処理回路と、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを、前記高周波用バンドパスフィルタ処理回路により抽出された前記高周波数の帯域制限信号と乗算し、高周波数の相互相関値を算出する高周波数用相関値算出回路と、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを、前記低周波用バンドパスフィルタ処理回路により抽出された前記低周波数の帯域制限信号と乗算し、低周波数の相互相関値を算出する低周波数用相関値算出回路とを更に備え、前記相関値算出回路は、前記高周波数用相関値算出回路により算出された高周波数の相互相関値と前記低周波数用相関値算出回路により算出された低周波数の相互相関値とを加算することにより、前記利得制御値を算出するための最終的な相互相関値を計算することを特徴とする。 In the above invention, the present invention provides a high frequency band modulation method that uses a wideband frequency received signal by bandpass filtering when demodulating a frequency shift modulation method as a desired radio communication method. A high-frequency band-pass filter processing circuit for extracting a frequency band-limited signal, and a low-frequency band-pass signal for extracting a low-frequency band-limited signal to be used in a frequency shift keying method by band-pass filter processing from the received signal in the wide frequency band A bandpass filter processing circuit for use and a known preamble pattern included in a data frame of a desired wireless communication method are separated into a high frequency and a low frequency, and the separated preamble pattern is separated by the bandpass filter processing circuit for high frequency Multiply the extracted high frequency band-limited signal to calculate the high frequency cross-correlation value. A high-frequency correlation value calculation circuit and a known preamble pattern included in a data frame of a desired wireless communication system are separated into a high frequency and a low frequency, and the separated preamble pattern is subjected to the low-frequency bandpass filter processing. A low-frequency correlation value calculating circuit that multiplies the low-frequency band-limited signal extracted by the circuit to calculate a low-frequency cross-correlation value, and the correlation value calculating circuit includes the high-frequency correlation value By adding the high-frequency cross-correlation value calculated by the calculation circuit and the low-frequency cross-correlation value calculated by the low-frequency correlation value calculation circuit, a final control for calculating the gain control value is performed. It is characterized by calculating a cross-correlation value.
この発明によれば、受信利得制御装置は様々な無線通信方式の信号を含む広帯域な周波数帯の受信信号から特定の周波数帯の帯域制限信号を抽出するバンドパスフィルタ処理を行い、前記帯域制限信号に含まれる所望の無線通信方式の復調処理に適した電力レベルになるように、前記帯域制限信号の電力利得を制御するようにしたため、広帯域な周波数帯に含まれ、利用する周波数帯の異なる各無線通信方式の信号の受信電力に強弱がある場合であっても、無線通信方式毎に適切な利得制御を行うことができる。これにより、強い受信電力の無線通信方式の信号と弱い受信電力の無線通信方式の信号とを同時に受信した場合であっても、それぞれの無線通信方式の信号を復調することができるという利点が得られる。 According to the present invention, the reception gain control device performs bandpass filter processing for extracting a band limited signal of a specific frequency band from a received signal in a wide frequency band including signals of various wireless communication schemes, and the band limited signal Since the power gain of the band-limited signal is controlled so that the power level is suitable for demodulation processing of a desired wireless communication method included in the frequency band, each of the different frequency bands to be used is included in the wideband frequency band. Even when the received power of the wireless communication system signal is strong or weak, appropriate gain control can be performed for each wireless communication system. As a result, even when a signal with a strong communication power and a signal with a weak communication power are received at the same time, it is possible to demodulate each signal with a wireless communication system. It is done.
また、バンドパスフィルタ処理後の帯域制限信号を所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算して相互相関値を計算し、その計算結果に基づき利得制御値を計算することにより、適切な利得制御値で前記帯域制限信号の利得制御を行うことができるという利点が得られる。 In addition, a cross-correlation value is calculated by multiplying the band-limited signal after the band-pass filter processing by a known preamble pattern included in a data frame of a desired wireless communication method, and a gain control value is calculated based on the calculation result Thus, an advantage is obtained that the gain control of the band limited signal can be performed with an appropriate gain control value.
本発明では、様々な無線通信方式の信号を含む広帯域な周波数帯の受信信号から特定の周波数帯の帯域制限信号を抽出するバンドパスフィルタ処理を行い、帯域制限信号に含まれる所望の無線通信方式の復調処理に適した電力レベルになるように、帯域制限信号の電力利得をソフトウェア信号処理で自動的に制御することを特徴とする。これにより、利用する周波数帯の異なる各無線通信方式の信号の受信電力に強弱がある場合であっても、無線通信方式毎に適切な利得制御を行うことが可能になる。ゆえに、強い受信電力の無線通信方式の信号と弱い受信電力の無線通信方式の信号とを同時に受信した場合であっても、それぞれの無線通信方式の信号を復調することができるという効果を奏する。 In the present invention, a bandpass filter process for extracting a band-limited signal in a specific frequency band from a received signal in a wide frequency band including signals of various wireless communication systems is performed, and a desired wireless communication system included in the band-limited signal is performed. The power gain of the band-limited signal is automatically controlled by software signal processing so that the power level is suitable for the demodulation process. As a result, even when the received power of the signals of the respective wireless communication systems using different frequency bands is strong or weak, it is possible to perform appropriate gain control for each wireless communication system. Therefore, even when a signal of a wireless communication system with strong reception power and a signal of a wireless communication system with weak reception power are received at the same time, there is an effect that the signal of each wireless communication system can be demodulated.
以下、本発明の一実施形態を、図面を参照して説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Ａ．基本動作
まず、本発明の受信利得制御方法の基本動作について説明する。
図１は、本発明による受信利得制御方法の基本動作を示すフローチャートである。様々な無線通信方式の信号を含む広帯域な周波数帯の受信信号を一括して受信し、該受信信号をディジタルの受信データに変換すると（ステップＳ１）、ソフトウェア信号処理によるバンドパスフィルタ処理により、広帯域な周波数帯の受信データから特定の周波数帯の帯域制限信号を抽出し（ステップＳ２）、帯域制限信号に含まれる所望の無線通信方式の復調処理に適した電力レベルになるように、ソフトウェア信号処理により、該帯域制限信号の電力利得を制御する（ステップＳ３）。
A. Basic Operation First, the basic operation of the reception gain control method of the present invention will be described.
FIG. 1 is a flowchart showing the basic operation of a reception gain control method according to the present invention. When reception signals in a wide frequency band including signals of various wireless communication systems are collectively received and converted into digital reception data (step S1), wideband filtering is performed by software signal processing. A band-limited signal of a specific frequency band is extracted from received data of a specific frequency band (step S2), and software signal processing is performed so that the power level is suitable for demodulation processing of a desired wireless communication method included in the band-limited signal Thus, the power gain of the band limited signal is controlled (step S3).
以下、上述した本発明による受信利得制御方法、および受信利得制御装置の詳細について説明する。 Details of the above-described reception gain control method and reception gain control apparatus according to the present invention will be described below.
Ｂ．第１実施形態
次に、本発明の第１実施形態について説明する。
図２は、本発明の第１実施形態による受信利得制御装置の構成を示すブロック図である。図において、まず、受信利得制御装置１−１は、複数のソフトウェア自動利得制御回路１−８を備えている。複数のソフトウェア自動利得制御回路１−８は、各々、周波数帯毎、あるいは所望の無線通信方式毎に、動作パラメータが異なる。また、複数のソフトウェア自動利得制御回路１−８は、同時に並列動作できる構成となっている。
B. First Embodiment Next, a first embodiment of the present invention will be described.
FIG. 2 is a block diagram showing the configuration of the reception gain control apparatus according to the first embodiment of the present invention. In the figure, first, the reception gain control device 1-1 includes a plurality of software automatic gain control circuits 1-8. The plurality of software automatic gain control circuits 1-8 have different operation parameters for each frequency band or each desired wireless communication system. Further, the plurality of software automatic gain control circuits 1-8 can be operated in parallel at the same time.
ＲＦフロントエンド部２−２は、受信信号２−１に対して、受信利得制御や、ダウンコンバートなどを行った後、アナログベースバンド信号をＡＤ変換回路２−３に出力する。ＡＤ変換回路２−３は、アナログベースバンド信号のＡＤ変換を行い、ディジタルベースバンド信号を受信利得制御装置１−１に含まれるソフトウェア自動利得制御回路１−８内のバンドパスフィルタ処理回路１−２に出力する。 The RF front end unit 2-2 performs reception gain control, down-conversion, and the like on the reception signal 2-1, and then outputs an analog baseband signal to the AD conversion circuit 2-3. The AD conversion circuit 2-3 performs AD conversion of the analog baseband signal and converts the digital baseband signal into a bandpass filter processing circuit 1-1 in the software automatic gain control circuit 1-8 included in the reception gain control device 1-1. Output to 2.
バンドパスフィルタ処理回路１−２は、ディジタルベースバンド信号から、特定の周波数帯の帯域制限信号を抽出する。信号蓄積回路１−３は、抽出された帯域制限信号を蓄積する。相関値算出回路１−４は、信号蓄積回路１−３に蓄積された帯域制限信号を読み出し、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算し、相互相関値を計算する。 The band pass filter processing circuit 1-2 extracts a band limited signal of a specific frequency band from the digital baseband signal. The signal accumulation circuit 1-3 accumulates the extracted band limited signal. The correlation value calculation circuit 1-4 reads the band limited signal stored in the signal storage circuit 1-3, multiplies it with a known preamble pattern included in a data frame of a desired wireless communication system, and calculates a cross correlation value. .
データ有無判定回路１−５は、相関値算出回路１−４で計算した相互相関値を予め設定した信号有無判定閾値と比較し、所望の無線通信方式のデータフレームが帯域制限信号の中に含まれているか否かを判定する。利得制御値算出回路１−６は、所望の無線通信方式のデータフレームが帯域制限信号の中に含まれていると判定された場合には、相関値算出回路１−４で計算した相互相関値に基づき、帯域制限信号の電力利得を適切に制御するための利得制御値を計算する。利得制御値の計算例を以下の数式に示す。 The data presence / absence determination circuit 1-5 compares the cross-correlation value calculated by the correlation value calculation circuit 1-4 with a preset signal presence / absence determination threshold, and a data frame of a desired wireless communication method is included in the band limited signal. It is determined whether or not. When it is determined that the data frame of the desired wireless communication system is included in the band limited signal, the gain control value calculation circuit 1-6 calculates the cross-correlation value calculated by the correlation value calculation circuit 1-4. Based on the above, a gain control value for appropriately controlling the power gain of the band limited signal is calculated. An example of calculating the gain control value is shown in the following formula.
利得制御値＝１／（ピーク相互相関値／基準相関値） Gain control value = 1 / (peak cross-correlation value / reference correlation value)
ここで、ピーク相互相関値とは、帯域制限信号を１サンプル毎にシフトしながらプリアンブルパターンと乗算したときに、１データフレーム内で最大となる相関値である。基準相関値とは、予め設定した所望の無線通信方式の利得制御の基準となる相関値である。 Here, the peak cross-correlation value is a correlation value that becomes the maximum in one data frame when the band-limited signal is multiplied by the preamble pattern while shifting every sample. The reference correlation value is a correlation value serving as a reference for gain control of a desired wireless communication method set in advance.
利得制御回路１−７は、信号蓄積回路１−３で蓄積した帯域制限信号を読み出し、利得制御値算出回路１−６で計算した利得制御値に基づき、読み出した帯域制限信号の電力利得をソフトウェア信号処理で制御し、復調処理回路２−４に出力する。復調処理回路２−４は、ディジタル信号処理により復調を行い、復調後のデータ２−６を出力するとともに、復調時の受信電力のレベルを測定し、ＲＦフロントエンド部２−２に対して、受信電力の利得制御のためのＲＦフロントエンド部利得制御信号２−５を、ＲＦフロントエンド部２−２に供給する。ＲＦフロントエンド部２−２は、ＲＦフロントエンド部利得制御信号２−５に基づき、受信信号２−１の電力の強弱に対して利得調整を行う。 The gain control circuit 1-7 reads the band limit signal stored in the signal storage circuit 1-3, and sets the power gain of the read band limit signal to software based on the gain control value calculated by the gain control value calculation circuit 1-6. It is controlled by signal processing and output to the demodulation processing circuit 2-4. The demodulation processing circuit 2-4 performs demodulation by digital signal processing, outputs demodulated data 2-6, measures the level of received power at the time of demodulation, and outputs to the RF front end unit 2-2 An RF front end gain control signal 2-5 for gain control of received power is supplied to the RF front end 2-2. The RF front end unit 2-2 performs gain adjustment on the strength of the power of the reception signal 2-1 based on the RF front end unit gain control signal 2-5.
図３は、本第１実施形態による受信利得制御方法の動作を示すフローチャートである。まず、受信利得制御装置１−１のソフトウェア自動利得制御回路１−８に受信データが入力されると（ステップＳ１０）、バンドパスフィルタ処理回路１−２は、特定の周波数帯の帯域制限信号を抽出し（ステップＳ１１）、信号蓄積回路１−３は、抽出した帯域制限信号をバッファに蓄積する（ステップＳ１２）。 FIG. 3 is a flowchart showing the operation of the reception gain control method according to the first embodiment. First, when reception data is input to the software automatic gain control circuit 1-8 of the reception gain control device 1-1 (step S10), the bandpass filter processing circuit 1-2 outputs a band-limited signal in a specific frequency band. Extracting (step S11), the signal storage circuit 1-3 stores the extracted band-limited signal in the buffer (step S12).
相関値算出回路１−４は、信号蓄積回路１−３に蓄積された帯域制限信号を読み出し、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算し、相互相関値を計算する（ステップＳ１３）。データ有無判定回路１−５は、相関値算出回路１−４で計算した相互相関値を予め設定した信号有無判定閾値と比較し、所望の無線通信方式のデータフレームが帯域制限信号の中に含まれているか否かを判定する（ステップＳ１４）。 The correlation value calculation circuit 1-4 reads the band limited signal stored in the signal storage circuit 1-3, multiplies it with a known preamble pattern included in a data frame of a desired wireless communication system, and calculates a cross correlation value. (Step S13). The data presence / absence determination circuit 1-5 compares the cross-correlation value calculated by the correlation value calculation circuit 1-4 with a preset signal presence / absence determination threshold, and a data frame of a desired wireless communication method is included in the band limited signal. It is determined whether it has been (step S14).
そして、データ有無判定回路１−５において所望の無線通信方式のデータフレームが帯域制限信号の中に含まれていないと判定された場合には（ステップＳ１４のＮＯ）、以降の処理は、行わずに終了する。一方、データ有無判定回路１−５において所望の無線通信方式のデータフレームが帯域制限信号の中に含まれていると判定された場合には（ステップＳ１４のＹＥＳ）、利得制御値算出回路１−６は、相関値算出回路１−４で計算した相互相関値に基づき、帯域制限信号の電力利得を適切に制御するための利得制御値を計算する（ステップＳ１５）。 If the data presence / absence determination circuit 1-5 determines that the data frame of the desired wireless communication system is not included in the band limited signal (NO in step S14), the subsequent processing is not performed. To finish. On the other hand, if the data presence / absence determination circuit 1-5 determines that the data frame of the desired wireless communication system is included in the band limited signal (YES in step S14), the gain control value calculation circuit 1- 6 calculates a gain control value for appropriately controlling the power gain of the band-limited signal based on the cross-correlation value calculated by the correlation value calculation circuit 1-4 (step S15).
利得制御回路１−７は、信号蓄積回路１−３で蓄積した帯域制限信号を読み出し、利得制御値算出回路１−６で計算した利得制御値に基づき、帯域制限信号の電力利得をソフトウェア信号処理で制御し（ステップＳ１６）、復調処理回路２−４にデータを出力する（ステップＳ１７）。 The gain control circuit 1-7 reads the band limit signal stored in the signal storage circuit 1-3, and performs software signal processing on the power gain of the band limit signal based on the gain control value calculated by the gain control value calculation circuit 1-6. (Step S16), and outputs data to the demodulation processing circuit 2-4 (step S17).
このように、本第１実施形態によれば、広帯域な周波数帯に含まれ、利用する周波数帯の異なる各無線通信方式の信号の受信電力に強弱がある場合であっても、無線通信方式毎に適切な利得制御を行うことができる。これにより、強い受信電力の無線通信方式の信号と弱い受信電力の無線通信方式の信号とを同時に受信した場合でも、それぞれの無線通信方式の信号を復調することができる。 As described above, according to the first embodiment, even if the received power of the signals of the wireless communication methods included in the wide frequency band and different frequency bands to be used is strong or weak, each wireless communication method Therefore, it is possible to perform appropriate gain control. Thereby, even when a signal of a wireless communication system with strong reception power and a signal of a wireless communication system with weak reception power are received at the same time, the signal of each wireless communication system can be demodulated.
また、バンドパスフィルタ処理後の帯域制限信号を所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算して相互相関値を計算し、その計算結果に基づき利得制御値を計算することより、適切な利得制御値で前記帯域制限信号の利得制御を行うことができる。 In addition, a cross-correlation value is calculated by multiplying the band-limited signal after the band-pass filter processing by a known preamble pattern included in a data frame of a desired wireless communication method, and a gain control value is calculated based on the calculation result Thus, the gain control of the band limited signal can be performed with an appropriate gain control value.
なお、本第１実施形態において、ＲＦフロントエンド部２−２とＡＤ変換回路２−３と受信利得制御装置１−１と復調処理回路２−４とは、直接接続されていると説明したが、それぞれネットワークを介して接続されていても良い。これにより、各回路や装置の設置自由度を高めることができる。 In the first embodiment, the RF front end unit 2-2, the AD conversion circuit 2-3, the reception gain control device 1-1, and the demodulation processing circuit 2-4 are described as being directly connected. Each may be connected via a network. Thereby, the freedom degree of installation of each circuit and apparatus can be raised.
Ｃ．第２実施形態
次に、本発明の第２実施形態について説明する。本第２実施形態は、所望の無線通信方式として、周波数偏移変調（ＦＳＫ：Ｆｒｅｑｕｅｎｃｙ Ｓｈｉｆｔ Ｋｅｙｉｎｇ）方式の復調を行う場合の受信利得制御の例である。
C. Second Embodiment Next, a second embodiment of the present invention will be described. The second embodiment is an example of reception gain control in the case of performing demodulation of a frequency shift keying (FSK) system as a desired wireless communication system.
図４は、本発明の第２実施形態による受信利得制御装置の構成を示すブロック図である。第２実施形態における受信利得制御装置３−１は、上述した第１実施形態における受信利得制御装置１−１のソフトウェア自動利得制御回路１−８の構成に、さらに高周波数用バンドパスフィルタ処理回路３−１、低周波数用バンドパスフィルタ処理回路３−２、高周波数用相関値算出回路３−３、低周波数用相関値算出回路３−４を備えるソフトウェア自動利得制御回路３−８からなる。また、相関値算出回路３−５の機能が、第１実施形態の相関値算出回路１−４の機能と異なる。他の構成・機能は、第１実施形態と同一であるため、同じ符号を付けて説明を省略する。 FIG. 4 is a block diagram showing a configuration of a reception gain control apparatus according to the second embodiment of the present invention. The reception gain control device 3-1 in the second embodiment has a high-frequency bandpass filter processing circuit in addition to the configuration of the software automatic gain control circuit 1-8 of the reception gain control device 1-1 in the first embodiment described above. 3-1, a low-frequency bandpass filter processing circuit 3-2, a high-frequency correlation value calculation circuit 3-3, and a software automatic gain control circuit 3-8 including a low-frequency correlation value calculation circuit 3-4. Further, the function of the correlation value calculation circuit 3-5 is different from the function of the correlation value calculation circuit 1-4 of the first embodiment. Other configurations and functions are the same as those in the first embodiment, and thus the same reference numerals are given and description thereof is omitted.
ＡＤ変換回路２−３は、ディジタルベースバンド信号を受信利得制御装置３−１に含まれるソフトウェア自動利得制御回路３−８内のバンドパスフィルタ処理回路１−２、高周波数用バンドパスフィルタ処理回路３−１、低周波数用バンドパスフィルタ処理回路３−２に出力する。 The AD conversion circuit 2-3 includes a bandpass filter processing circuit 1-2 and a high-frequency bandpass filter processing circuit in the software automatic gain control circuit 3-8 included in the reception gain control device 3-1 for the digital baseband signal. 3-1. Output to the low-frequency bandpass filter processing circuit 3-2.
高周波数用バンドパスフィルタ処理回路３−１は、ＦＳＫ方式で利用する２つの周波数のうち、高周波数に対応した帯域制限信号を抽出する。高周波数用相関値算出回路３−３は、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンをＦＳＫ方式の高周波数と低周波数とに分離し、分離した高周波数のプリアンブルパターンを高周波数用バンドパスフィルタ処理回路３−１から出力されたＦＳＫ方式の高周波数の帯域制限信号と乗算し、ＦＳＫ方式の高周波数の相互相関値を計算する。 The high-frequency bandpass filter processing circuit 3-1 extracts a band-limited signal corresponding to a high frequency from two frequencies used in the FSK method. The high-frequency correlation value calculation circuit 3-3 separates a known preamble pattern included in a data frame of a desired wireless communication method into a high frequency and a low frequency of the FSK method, and converts the separated high-frequency preamble pattern into a high frequency The FSK high-frequency band limit signal output from the frequency bandpass filter processing circuit 3-1 is multiplied to calculate the FSK high-frequency cross-correlation value.
一方、低周波数用バンドパスフィルタ処理回路３−２は、ＦＳＫ方式で利用する２つの周波数のうち、低周波数に対応した帯域制限信号を抽出する。低周波数用相関値算出回路３−４は、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンをＦＳＫ方式の高周波数と低周波数とに分離し、分離した低周波数のプリアンブルパターンを低周波数用バンドパスフィルタ処理回路３−２から出力されたＦＳＫ方式の低周波数の帯域制限信号と乗算し、ＦＳＫ方式の低周波数の相互相関値を計算する。 On the other hand, the low-frequency bandpass filter processing circuit 3-2 extracts a band-limited signal corresponding to a low frequency out of two frequencies used in the FSK method. The low frequency correlation value calculation circuit 3-4 separates a known preamble pattern included in a data frame of a desired wireless communication system into a high frequency and a low frequency of the FSK system, and reduces the separated low frequency preamble pattern to a low frequency The FSK low-frequency band-limited signal output from the frequency band-pass filter processing circuit 3-2 is multiplied to calculate the FSK low-frequency cross-correlation value.
相関値算出回路３−５は、高周波数用相関値算出回路３−３で計算したＦＳＫ方式の高周波数の相互相関値と、低周波数用相関値算出回路３−４で計算したＦＳＫ方式の低周波数の相互相関値とを、サンプルタイミングを合わせて加算することで、相互相関値の合計値を計算し、計算結果をデータ有無判定回路１−５に出力する。 The correlation value calculation circuit 3-5 includes an FSK high-frequency cross-correlation value calculated by the high-frequency correlation value calculation circuit 3-3 and an FSK low-frequency calculation calculated by the low-frequency correlation value calculation circuit 3-4. The sum of the cross-correlation values is calculated by adding the cross-correlation values of the frequencies together with the sample timing, and the calculation result is output to the data presence / absence determination circuit 1-5.
図５は、本第２実施形態による受信利得制御方法の動作を示すフローチャートである。まず、受信利得制御装置１−１のソフトウェア自動利得制御回路３−８に受信データが入力されると（ステップＳ２０）、バンドパスフィルタ処理回路１−２は、受信データから特定の周波数帯の帯域制限信号を抽出し（ステップＳ２１）、信号蓄積回路１−３は、抽出した帯域制限信号をバッファに蓄積する（ステップＳ２２）。 FIG. 5 is a flowchart showing the operation of the reception gain control method according to the second embodiment. First, when reception data is input to the software automatic gain control circuit 3-8 of the reception gain control device 1-1 (step S20), the bandpass filter processing circuit 1-2 determines a band of a specific frequency band from the reception data. The limit signal is extracted (step S21), and the signal storage circuit 1-3 stores the extracted band limit signal in the buffer (step S22).
一方、高周波数用バンドパスフィルタ処理回路３−１は、受信データからＦＳＫ方式で利用する２つの周波数のうち、高周波数に対応した帯域制限信号を抽出する（ステップＳ２３）。高周波数用相関値算出回路３−３は、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンをＦＳＫ方式の高周波数と低周波数とに分離し、分離した高周波数のプリアンブルパターンを高周波数用バンドパスフィルタ処理回路３−１から出力されたＦＳＫ方式の高周波数の帯域制限信号と乗算し、ＦＳＫ方式の高周波数の相互相関値を計算する（ステップＳ２４）。 On the other hand, the high-frequency bandpass filter processing circuit 3-1 extracts a band-limited signal corresponding to the high frequency from the two frequencies used in the FSK method from the received data (step S23). The high-frequency correlation value calculation circuit 3-3 separates a known preamble pattern included in a data frame of a desired wireless communication method into a high frequency and a low frequency of the FSK method, and converts the separated high-frequency preamble pattern into a high frequency The FSK high frequency band-limited signal output from the frequency bandpass filter processing circuit 3-1 is multiplied to calculate the FSK high frequency cross-correlation value (step S24).
また、低周波数用バンドパスフィルタ処理回路３−２は、受信データからＦＳＫ方式で利用する２つの周波数のうち、低周波数に対応した帯域制限信号を抽出する（ステップＳ２５）。低周波数用相関値算出回路３−４は、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンをＦＳＫ方式の高周波数と低周波数とに分離し、分離した低周波数のプリアンブルパターンを低周波数用バンドパスフィルタ処理回路３−２から出力されたＦＳＫ方式の低周波数の帯域制限信号と乗算し、ＦＳＫ方式の低周波数の相互相関値を計算する（ステップＳ２６）。 Further, the low-frequency bandpass filter processing circuit 3-2 extracts a band-limited signal corresponding to the low frequency from the two frequencies used by the FSK method from the received data (step S25). The low frequency correlation value calculation circuit 3-4 separates a known preamble pattern included in a data frame of a desired wireless communication system into a high frequency and a low frequency of the FSK system, and reduces the separated low frequency preamble pattern to a low frequency The FSK low-frequency band-limited signal output from the frequency bandpass filter processing circuit 3-2 is multiplied to calculate the FSK low-frequency cross-correlation value (step S26).
相関値算出回路３−５は、高周波数用相関値算出回路３−３で計算したＦＳＫ方式の高周波数の相互相関値と、低周波数用相関値算出回路３−４で計算したＦＳＫ方式の低周波数の相互相関値とを、サンプルタイミングを合わせて加算することで、相互相関値の合計値を計算する（ステップＳ２７）。次に、データ有無判定回路１−５は、相関値算出回路１−４で計算した相互相関値を予め設定した信号有無判定閾値と比較し、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれているか否かを判定する（ステップＳ２８）。 The correlation value calculation circuit 3-5 includes an FSK high-frequency cross-correlation value calculated by the high-frequency correlation value calculation circuit 3-3 and an FSK low-frequency calculation calculated by the low-frequency correlation value calculation circuit 3-4. The sum of the cross-correlation values is calculated by adding the cross-correlation values of the frequencies together with the sample timing (step S27). Next, the data presence / absence determination circuit 1-5 compares the cross-correlation value calculated by the correlation value calculation circuit 1-4 with a preset signal presence / absence determination threshold, and a data frame of a desired wireless communication scheme is the band-limited signal. It is determined whether it is included in (step S28).
データ有無判定回路１−５において所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれていないと判定された場合には（ステップＳ２８のＮＯ）、以降の処理は行わず終了する。一方、データ有無判定回路１−５において所望の無線通信方式のデータフレームが帯域制限信号の中に含まれていると判定された場合には（ステップＳ２８のＹＥＳ）、利得制御値算出回路１−６は、相関値算出回路１−４で計算した相互相関値に基づき、帯域制限信号の電力利得を適切に制御するための利得制御値を計算する（ステップＳ２９）。 If the data presence / absence determination circuit 1-5 determines that the data frame of the desired wireless communication system is not included in the band limited signal (NO in step S28), the process is terminated without performing the subsequent processing. . On the other hand, when the data presence / absence determination circuit 1-5 determines that the data frame of the desired wireless communication method is included in the band limited signal (YES in step S28), the gain control value calculation circuit 1- 6 calculates a gain control value for appropriately controlling the power gain of the band-limited signal based on the cross-correlation value calculated by the correlation value calculation circuit 1-4 (step S29).
そして、利得制御回路１−７は、信号蓄積回路１−３で蓄積した帯域制限信号を読み出し、利得制御値算出回路１−６で計算した利得制御値に基づき、読み出した帯域制限信号の電力利得をソフトウェア信号処理で制御し（ステップＳ３０）、復調処理回路２−４にデータを出力する（ステップＳ３１）。 Then, the gain control circuit 1-7 reads the band limit signal accumulated by the signal accumulation circuit 1-3, and based on the gain control value calculated by the gain control value calculation circuit 1-6, the power gain of the read band limit signal Is controlled by software signal processing (step S30), and data is output to the demodulation processing circuit 2-4 (step S31).
以降、第１実施形態と同様に、復調処理回路２−４は、ディジタル信号処理により復調を行い、復調後のデータ２−６を出力するとともに、復調時の受信電力のレベルを測定し、ＲＦフロントエンド部２−２に対して、受信電力の利得制御のためのＲＦフロントエンド部利得制御信号２−５を、ＲＦフロントエンド部２−２に供給する。ＲＦフロントエンド部２−２は、ＲＦフロントエンド部利得制御信号２−５に基づき、受信信号２−１の電力の強弱に対して利得調整を行う。 Thereafter, as in the first embodiment, the demodulation processing circuit 2-4 performs demodulation by digital signal processing, outputs demodulated data 2-6, measures the level of received power at the time of demodulation, and performs RF An RF front end unit gain control signal 2-5 for gain control of received power is supplied to the front end unit 2-2 to the RF front end unit 2-2. The RF front end unit 2-2 performs gain adjustment on the strength of the power of the reception signal 2-1 based on the RF front end unit gain control signal 2-5.
このように、本第２実施形態によれば、所望の無線通信方式がＦＳＫ方式を利用する場合、ＦＳＫ方式で利用する高周波数と低周波数とに分離してプリアンブルパターンを乗算し、それぞれの相互相関値を計算し、各相互相関値を加算することにより、高精度に相関値を計算することができる。これにより、利得制御値の計算制度を向上することができ、高精度に利得制御を行うことができる。 As described above, according to the second embodiment, when the desired wireless communication method uses the FSK method, the high frequency and the low frequency used in the FSK method are separated into each other and multiplied by the preamble pattern. By calculating the correlation value and adding each cross-correlation value, the correlation value can be calculated with high accuracy. Thereby, the calculation system of the gain control value can be improved, and gain control can be performed with high accuracy.
なお、本第２実施形態において、ＲＦフロントエンド部２−２とＡＤ変換回路２−３と受信利得制御装置３−１と復調処理回路２−４とは、直接接続されていると説明したが、それぞれネットワークを介して接続されていても良い。これにより、各回路や装置の設置自由度を高めることができる。 In the second embodiment, it has been described that the RF front end unit 2-2, the AD conversion circuit 2-3, the reception gain control device 3-1, and the demodulation processing circuit 2-4 are directly connected. Each may be connected via a network. Thereby, the freedom degree of installation of each circuit and apparatus can be raised.
また、上述した第１、第２実施形態において、受信利得制御装置１−１、３−１における各機能を実現するためのプログラムをコンピュータ読み取り可能な記録媒体に記録して、この記録媒体に記録されたプログラムをコンピュータシステムに読み込ませ、実行するようにしてもよい。なお、ここでいう「コンピュータシステム」とは、ＯＳや周辺機器等のハードウェアを含むものであってもよい。また、「コンピュータシステム」は、ＷＷＷシステムを利用している場合であれば、ホームページ提供環境（あるいは表示環境）も含むものとする。また、「コンピュータ読み取り可能な記録媒体」とは、フレキシブルディスク、光磁気ディスク、ＲＯＭ、フラッシュメモリ等の書き込み可能な不揮発性メモリ、ＣＤ−ＲＯＭ等の可搬媒体、コンピュータシステムに内蔵されるハードディスク等の記憶装置のことをいう。 In the first and second embodiments described above, a program for realizing each function in the reception gain control apparatuses 1-1 and 3-1 is recorded on a computer-readable recording medium and recorded on the recording medium. The read program may be read into a computer system and executed. Here, the “computer system” may include an OS and hardware such as peripheral devices. Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used. The “computer-readable recording medium” means a flexible disk, a magneto-optical disk, a ROM, a writable nonvolatile memory such as a flash memory, a portable medium such as a CD-ROM, a hard disk built in a computer system, etc. This is a storage device.
さらに「コンピュータ読み取り可能な記録媒体」とは、インターネット等のネットワークや電話回線等の通信回線を介してプログラムが送信された場合のサーバやクライアントとなるコンピュータシステム内部の揮発性メモリ（例えばＤＲＡＭ（Dynamic Random Access Memory））のように、一定時間プログラムを保持しているものも含むものとする。また、上記プログラムは、このプログラムを記憶装置等に格納したコンピュータシステムから、伝送媒体を介して、あるいは、伝送媒体中の伝送波により他のコンピュータシステムに伝送されてもよい。ここで、プログラムを伝送する「伝送媒体」は、インターネット等のネットワーク（通信網）や電話回線等の通信回線（通信線）のように情報を伝送する機能を有する媒体のことをいう。また、上記プログラムは、前述した機能の一部を実現するためのものであっても良い。さらに、前述した機能をコンピュータシステムにすでに記録されているプログラムとの組み合わせで実現できるもの、いわゆる差分ファイル（差分プログラム）であっても良い。 Further, the “computer-readable recording medium” means a volatile memory (for example, DRAM (Dynamic DRAM) in a computer system that becomes a server or a client when a program is transmitted through a network such as the Internet or a communication line such as a telephone line. Random Access Memory)), etc., which hold programs for a certain period of time. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.
１−１、３−１ 受信利得制御装置
１−２ バンドパスフィルタ処理回路
１−３ 信号蓄積回路
１−４ 相関値算出回路
１−５ データ有無判定回路
１−６ 利得制御値算出回路
１−７ 利得制御回路
２−１ 受信信号
２−２ ＲＦフロントエンド部
２−３ ＡＤ変換回路
２−４ 復調処理回路
２−５ ＲＦフロントエンド部利得制御信号
２−６ データ
３−１ 高周波用バンドパスフィルタ処理回路
３−２ 低周波用バンドパスフィルタ処理回路
３−３ 高周波用相関値算出回路
３−４ 低周波用相関値算出回路
３−５ 相関値算出回路
1-1, 3-1 Reception gain control device 1-2 Band pass filter processing circuit 1-3 Signal accumulation circuit 1-4 Correlation value calculation circuit 1-5 Data presence / absence determination circuit 1-6 Gain control value calculation circuit 1-7 Gain Control Circuit 2-1 Received Signal 2-2 RF Front End Unit 2-3 AD Converter Circuit 2-4 Demodulation Processing Circuit 2-5 RF Front End Unit Gain Control Signal 2-6 Data 3-1 High Frequency Bandpass Filter Processing Circuit 3-2 Low-frequency bandpass filter processing circuit 3-3 High-frequency correlation value calculation circuit 3-4 Low-frequency correlation value calculation circuit 3-5 Correlation value calculation circuit
Claims (7)
広帯域な周波数帯の電波を受信するステップと、
前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により特定の周波数帯の帯域制限信号を抽出するステップと、
前記抽出された帯域制限信号に含まれる所望の無線通信方式の復調処理に適した電力レベルになるように、前記帯域制限信号の電力利得を制御するステップと
からなる利得制御ステップを含むことを特徴とする受信利得制御方法。 When demodulating the signals of the various wireless communication systems with respect to the received signals of the wide frequency bands including the signals of various wireless communication systems received in a batch, the reception of the received wide frequency bands is performed. A reception gain control method for controlling the gain of a signal, comprising:
Receiving radio waves in a wide frequency band; and
Extracting a band-limited signal of a specific frequency band by band-pass filtering from the received signal of the wide frequency band;
And a gain control step comprising: controlling a power gain of the band limited signal so as to obtain a power level suitable for demodulation processing of a desired wireless communication system included in the extracted band limited signal. A receiving gain control method.
前記バンドパスフィルタ処理後の帯域制限信号を蓄積するステップと、
前記蓄積した帯域制限信号を読み出し、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算し、相互相関値を算出するステップと、
前記算出された相互相関値に基づき、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれているか否かを判定するステップと、
所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれていると判定された場合、前記相互相関値に基づき、前記帯域制限信号の電力利得を適切に制御するための利得制御値を算出するステップと、
前記蓄積した帯域制限信号を読み出し、前記算出された利得制御値に基づき、帯域制限信号の電力利得を制御するステップと
を含むことを特徴とする請求項１に記載の受信利得制御方法。 The gain control step includes
Accumulating a band-limited signal after the bandpass filter processing;
Reading the accumulated band-limited signal, multiplying by a known preamble pattern included in a data frame of a desired wireless communication scheme, and calculating a cross-correlation value;
Determining whether a data frame of a desired wireless communication scheme is included in the band limited signal based on the calculated cross-correlation value;
A gain control value for appropriately controlling a power gain of the band-limited signal based on the cross-correlation value when it is determined that a data frame of a desired wireless communication method is included in the band-limited signal. Calculating steps,
2. The reception gain control method according to claim 1, further comprising: reading the accumulated band limit signal and controlling a power gain of the band limit signal based on the calculated gain control value.
所望の無線通信方式として、周波数偏移変調方式の復調を行う場合、
前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する高周波数と低周波数とのそれぞれの帯域制限信号を抽出するステップと、
所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを前記それぞれの帯域制限信号と乗算し、高周波数の相互相関値と低周波数の相互相関値とを算出するステップと、
前記算出された高周波数の相互相関値と低周波数の相互相関値とを加算することにより、前記利得制御値を算出するための最終的な相互相関値を計算するステップと
を更に含むことを特徴とする請求項２に記載の受信利得制御方法。 The gain control step includes
As a desired wireless communication method, when performing frequency shift keying demodulation,
Extracting each band-limited signal of high frequency and low frequency used in the frequency shift keying method by band-pass filter processing from the received signal in the wide frequency band;
A known preamble pattern included in a data frame of a desired wireless communication system is separated into a high frequency and a low frequency, and the separated preamble pattern is multiplied by the respective band-limited signals to obtain a high frequency cross-correlation value and a low frequency. Calculating a frequency cross-correlation value;
Adding the calculated high-frequency cross-correlation value and the low-frequency cross-correlation value to calculate a final cross-correlation value for calculating the gain control value. The reception gain control method according to claim 2.
前記広帯域な周波数帯の受信信号から特定の周波数帯の帯域制限信号を抽出するバンドパスフィルタ処理機能、
前記バンドパスフィルタ処理機能により抽出された前記帯域制限信号を蓄積する信号蓄積機能、
前記信号蓄積機能により蓄積された前記帯域制限信号を読み出し、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算し、相互相関値を算出する相関値算出機能、
前記算出された相互相関値に基づき、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれているか否かを判定するデータ有無判定機能、
前記データ有無判定機能により、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれていると判定された場合、前記相関値算出機能により算出された相互相関値に基づき、前記帯域制限信号の電力利得を適切に制御するための利得制御値を計算する利得制御値算出機能、
前記信号蓄積機能により蓄積された前記帯域制限信号を読み出し、前記利得制御値算出機能より算出された利得制御値に基づき、前記帯域制限信号の電力利得を制御する利得制御機能
を実行させることを特徴とするプログラム。 When demodulating the signals of the various wireless communication systems with respect to the received signals of the wide frequency bands including the signals of various wireless communication systems received in a batch, the reception of the received wide frequency bands is performed. A computer for controlling a reception gain control device for controlling a gain of a signal;
A bandpass filter processing function for extracting a band-limited signal in a specific frequency band from the received signal in the wide frequency band;
A signal storage function for storing the band-limited signal extracted by the band-pass filter processing function;
A correlation value calculation function for reading out the band-limited signal stored by the signal storage function, multiplying it by a known preamble pattern included in a data frame of a desired wireless communication method, and calculating a cross-correlation value;
A data presence / absence determination function for determining whether a data frame of a desired wireless communication method is included in the band-limited signal based on the calculated cross-correlation value;
When it is determined by the data presence / absence determination function that a data frame of a desired wireless communication method is included in the band limited signal, the band is based on the cross-correlation value calculated by the correlation value calculation function. A gain control value calculation function for calculating a gain control value for appropriately controlling the power gain of the limit signal;
Reading the band limited signal stored by the signal storage function, and executing a gain control function for controlling a power gain of the band limited signal based on a gain control value calculated by the gain control value calculating function. Program.
前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する高周波数の帯域制限信号を抽出する高周波用バンドパスフィルタ処理機能、
前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する低周波数の帯域制限信号を抽出する低周波用バンドパスフィルタ処理機能、
所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを、前記高周波用バンドパスフィルタ処理機能により抽出された前記高周波数の帯域制限信号と乗算し、高周波数の相互相関値を算出する高周波数用相関値算出機能、
所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを、前記低周波用バンドパスフィルタ処理機能により抽出された前記低周波数の帯域制限信号と乗算し、低周波数の相互相関値を算出する低周波数用相関値算出機能とを更に実行させ、
前記相関値算出機能は、
前記高周波数用相関値算出機能により算出された高周波数の相互相関値と前記低周波数用相関値算出機能により算出された低周波数の相互相関値とを加算することにより、前記利得制御値を算出するための最終的な相互相関値を計算する
ことを特徴とする請求項４に記載のプログラム。 As a desired wireless communication method, when performing frequency shift keying demodulation,
A high-frequency band-pass filter processing function for extracting a high-frequency band-limited signal used in the frequency shift keying modulation method from the received signal in the wide frequency band by band-pass filter processing;
A low-frequency band-pass filter processing function for extracting a low-frequency band-limited signal to be used in a frequency shift keying method by band-pass filter processing from the received signal in the wide frequency band;
A known preamble pattern included in a data frame of a desired wireless communication method is separated into a high frequency and a low frequency, and the separated preamble pattern is extracted by the high frequency bandpass filter processing function. A high-frequency correlation value calculation function that multiplies the limit signal and calculates a high-frequency cross-correlation value,
A known preamble pattern included in a data frame of a desired wireless communication system is separated into a high frequency and a low frequency, and the separated preamble pattern is extracted from the low frequency bandpass filter processing function. Further, a low-frequency correlation value calculation function for calculating a low-frequency cross-correlation value by multiplying the band-limited signal is executed,
The correlation value calculation function is:
The gain control value is calculated by adding the high-frequency cross-correlation value calculated by the high-frequency correlation value calculating function and the low-frequency cross-correlation value calculated by the low-frequency correlation value calculating function. The program according to claim 4, wherein a final cross-correlation value is calculated.
前記広帯域な周波数帯の受信信号から特定の周波数帯の帯域制限信号を抽出するバンドパスフィルタ処理回路と、
前記バンドパスフィルタ処理回路により抽出された前記帯域制限信号を蓄積する信号蓄積回路と、
前記信号蓄積回路に蓄積された前記帯域制限信号を読み出し、所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンと乗算し、相互相関値を算出する相関値算出回路と、
前記算出された相互相関値に基づき、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれているか否かを判定するデータ有無判定回路と、
前記データ有無判定回路により、所望の無線通信方式のデータフレームが前記帯域制限信号の中に含まれていると判定された場合、前記相関値算出回路で算出された相互相関値に基づき、前記帯域制限信号の電力利得を適切に制御するための利得制御値を計算する利得制御値算出回路と、
前記信号蓄積回路に蓄積された前記帯域制限信号を読み出し、前記利得制御値算出回路で算出された利得制御値に基づき、前記帯域制限信号の電力利得を制御する利得制御回路と
を備えたことを特徴とする受信利得制御装置。 When demodulating the signals of the various wireless communication systems with respect to the received signals of the wide frequency bands including the signals of various wireless communication systems received in a batch, the reception of the received wide frequency bands is performed. A reception gain control device for controlling the gain of a signal,
A bandpass filter processing circuit for extracting a band-limited signal of a specific frequency band from the received signal of the wideband frequency band;
A signal storage circuit for storing the band-limited signal extracted by the band-pass filter processing circuit;
A correlation value calculation circuit that reads out the band-limited signal stored in the signal storage circuit, multiplies it with a known preamble pattern included in a data frame of a desired wireless communication system, and calculates a cross-correlation value;
A data presence / absence determination circuit that determines whether a data frame of a desired wireless communication scheme is included in the band-limited signal based on the calculated cross-correlation value;
When it is determined by the data presence / absence determination circuit that a data frame of a desired wireless communication system is included in the band limited signal, based on the cross-correlation value calculated by the correlation value calculation circuit, the band A gain control value calculation circuit for calculating a gain control value for appropriately controlling the power gain of the limit signal;
A gain control circuit that reads the band-limited signal stored in the signal storage circuit and controls the power gain of the band-limited signal based on the gain control value calculated by the gain control value calculation circuit. A reception gain control device.
前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する高周波数の帯域制限信号を抽出する高周波用バンドパスフィルタ処理回路と、
前記広帯域な周波数帯の受信信号からバンドパスフィルタ処理により周波数偏移変調方式で利用する低周波数の帯域制限信号を抽出する低周波用バンドパスフィルタ処理回路と、
所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを、前記高周波用バンドパスフィルタ処理回路により抽出された前記高周波数の帯域制限信号と乗算し、高周波数の相互相関値を算出する高周波数用相関値算出回路と、
所望の無線通信方式のデータフレームに含まれる既知のプリアンブルパターンを高周波数と低周波数とに分離し、該分離したプリアンブルパターンを、前記低周波用バンドパスフィルタ処理回路により抽出された前記低周波数の帯域制限信号と乗算し、低周波数の相互相関値を算出する低周波数用相関値算出回路とを更に備え、
前記相関値算出回路は、
前記高周波数用相関値算出回路により算出された高周波数の相互相関値と前記低周波数用相関値算出回路により算出された低周波数の相互相関値とを加算することにより、前記利得制御値を算出するための最終的な相互相関値を計算する
ことを特徴とする請求項６に記載の受信利得制御装置。 As a desired wireless communication method, when performing frequency shift keying demodulation,
A high-frequency band-pass filter processing circuit for extracting a high-frequency band-limited signal used in the frequency shift keying method by band-pass filter processing from the received signal in the wide frequency band; and
A low-frequency band-pass filter processing circuit for extracting a low-frequency band-limited signal used in a frequency shift keying method by band-pass filter processing from the received signal in the wide frequency band; and
A known preamble pattern included in a data frame of a desired wireless communication system is separated into a high frequency and a low frequency, and the separated preamble pattern is extracted from the high frequency bandpass filter processing circuit. A high-frequency correlation value calculating circuit that multiplies the limiting signal and calculates a high-frequency cross-correlation value;
A known preamble pattern included in a data frame of a desired wireless communication system is separated into a high frequency and a low frequency, and the separated preamble pattern is extracted from the low frequency bandpass filter processing circuit. A low-frequency correlation value calculating circuit that multiplies the band-limited signal and calculates a low-frequency cross-correlation value;
The correlation value calculation circuit includes:
The gain control value is calculated by adding the high-frequency cross-correlation value calculated by the high-frequency correlation value calculating circuit and the low-frequency cross-correlation value calculated by the low-frequency correlation value calculating circuit. 7. The reception gain control apparatus according to claim 6, wherein a final cross-correlation value is calculated.
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