JP2000252926A - Device and method for measuring desired wave power to interfering wave power ratio of detected signal - Google Patents
Device and method for measuring desired wave power to interfering wave power ratio of detected signalInfo
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- JP2000252926A JP2000252926A JP5174499A JP5174499A JP2000252926A JP 2000252926 A JP2000252926 A JP 2000252926A JP 5174499 A JP5174499 A JP 5174499A JP 5174499 A JP5174499 A JP 5174499A JP 2000252926 A JP2000252926 A JP 2000252926A
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Abstract
Description
【０００１】[0001]
【発明が属する技術分野】この発明は検波した信号の希
望波電力と干渉波電力との比を測定する装置およびその
方法に係り、特に、ＣＤＭＡ方式（多元接続法式）の通
信システムにおいて好適に利用することができる検波信
号の希望波電力対干渉波電力比測定装置およびその方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for measuring a ratio between a desired signal power and an interference signal power of a detected signal, and more particularly to a CDMA (multiple access method) communication system. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for measuring a desired signal power to interference wave power ratio of a detected signal.
【０００２】[0002]
【従来の技術】従来、検波した信号の希望波電力と干渉
波電力との比を測定する装置に関連する技術は特開平１
０−１３５９０４号公報などに開示されている。図４は
このような従来の検波信号の希望波電力対干渉波電力比
測定装置の基本的な構成を示すブロック図である。図に
おいて、１は検波器などから無線信号などに基づいて出
力される復調シンボル、２はこの復調シンボル１が入力
され、この復調シンボル１から情報変調成分を取り除い
て、これを逆変調信号として出力する逆変調手段、３は
この逆変調手段２の出力する逆変調信号が入力され、デ
ータＮａｖ個分に相当する期間毎にその平均値を演算し
て平均値信号を出力する平均化手段、４は平均化手段３
の出力するこの平均値信号を二乗して希望波電力として
出力する二乗化手段、５は上記逆変調信号と上記平均値
信号とが入力され、上記データＮａｖ個分に相当する期
間毎にその分散値を演算してこの分散値を干渉波電力と
して出力する分散演算手段、６は上記希望波電力および
干渉波電力が入力され、この希望波電力の値を干渉波電
力の値で割った値を電力比測定値として出力するＳＩＲ
（Ｓｉｇｎａｌ ｔｏ Ｉｎｔｅｒｆｅｒｅｎｃｅ Ｒ
ａｔｉｏ）算出手段である。そして、この電力比測定値
が復調シンボル１の希望波電力対干渉波電力比ＳＩＲ１
４として出力される。2. Description of the Related Art Conventionally, a technique relating to an apparatus for measuring a ratio between a desired signal power and an interference signal power of a detected signal is disclosed in Japanese Unexamined Patent Publication No. Hei.
No. 0-135904. FIG. 4 is a block diagram showing a basic configuration of such a conventional apparatus for measuring a desired signal power / interference wave power ratio of a detected signal. In the figure, 1 is a demodulated symbol output from a detector or the like based on a radio signal or the like, 2 is a demodulated symbol 1 input, removes an information modulation component from the demodulated symbol 1, and outputs this as an inverse modulation signal. The inverse modulation means 3 receives the inverse modulation signal output from the inverse modulation means 2 and calculates an average value for each period corresponding to the number of data Nav to output an average value signal. Is the averaging means 3
The squaring means 5 for squaring the average value signal output as described above and outputting it as a desired signal power is provided with the inverse modulation signal and the average value signal, and the variance of the average value signal is dispersed every period corresponding to the data Nav. A dispersion calculating means 6 for calculating a value and outputting this variance value as interference wave power, receives the desired wave power and the interference wave power, and divides the desired wave power value by the interference wave power value. SIR output as measured power ratio
(Signal to Interference R
atio) calculation means. The measured power ratio is the desired signal power / interference signal power ratio SIR1 of demodulated symbol 1.
4 is output.
【０００３】次に動作について説明する。復調シンボル
１が逆変調手段２に入力されると、この逆変調手段２は
逆変調を行い情報変調の解かれた復調シンボルを出力す
る。そして、逆変調手段２からデータＮａｖ個分に相当
する期間の復調シンボルが出力される毎に、平均化手段
３はその期間における平均値を演算し、二乗化手段４は
その期間における平均値をその絶対値をとって二乗して
希望波電力を得、分散演算手段５はその期間における分
散値を演算して干渉波電力を得る。また、ＳＩＲ算出手
段６はこの希望波電力を干渉波電力で割って電力比測定
値を算出し、復調シンボル１の希望波電力対干渉波電力
比ＳＩＲ１４が出力される。Next, the operation will be described. When the demodulation symbol 1 is input to the inverse modulation means 2, the inverse modulation means 2 performs inverse modulation and outputs a demodulated symbol from which information modulation has been released. Each time a demodulated symbol for a period corresponding to the number of data Nav is output from the inverse modulation unit 2, the averaging unit 3 calculates the average value in that period, and the squaring unit 4 calculates the average value in that period. The absolute value is squared to obtain the desired wave power, and the dispersion calculating means 5 calculates the dispersion value in that period to obtain the interference wave power. The SIR calculating means 6 calculates a power ratio measurement value by dividing the desired signal power by the interference signal power, and outputs a desired signal power to interference signal power ratio SIR14 of the demodulated symbol 1.
【０００４】なお、上記特開平１０−１３５９０４号公
報に開示された希望波電力対干渉波電力比測定装置で
は、このような構成および動作を基本としつつ、干渉波
電力が増加する場合には上記希望波電力対干渉波電力比
を演算する際のデータ個数Ｎａｖを増加させることで、
干渉波電力の変動に起因する測定誤差の増加を抑制する
技術が開示されている。Incidentally, the desired-wave power-to-interference-wave-power-ratio measuring device disclosed in Japanese Patent Application Laid-Open No. 10-135904 is based on such a configuration and operation. By increasing the number of data Nav when calculating the desired wave power to interference wave power ratio,
There is disclosed a technique for suppressing an increase in a measurement error due to a fluctuation in interference wave power.
【０００５】[0005]
【発明が解決しようとする課題】従来の検波信号の希望
波電力対干渉波電力比測定装置およびその方法は以上の
ように構成されているので、いずれにしても、有限個Ｎ
ａｖの離散値に基づいて希望波電力と干渉波電力とを演
算し、更にこれらの比から電力比測定値を演算すること
になるので、平均値の中に干渉波電力成分が残留して、
その分、電力比測定値は無限の離散値に基づく理論値に
対して必然的にオフセットが生じてしまい、理論値より
も高い値が生成されてしまうなどの課題があった。The conventional apparatus for measuring the ratio of the power of a desired signal to the power of an interference wave of a detected signal and the method thereof are constructed as described above.
The desired wave power and the interference wave power are calculated based on the discrete values of av, and the power ratio measurement value is further calculated from these ratios, so that the interference wave power component remains in the average value,
Accordingly, there is a problem in that the measured power ratio is inevitably offset from the theoretical value based on infinite discrete values, and a value higher than the theoretical value is generated.
【０００６】特に、このようなオフセットは定常的に発
生してしまうものなので、ＣＤＭＡ方式の通信システム
においてこの電力比測定値を用いて移動局の出力電力を
制御した場合に、この移動局において常に余分な電力を
出力してしまったり、あるいは、常に実際の電力が低い
状態に制御されてしまったりするという問題が生じてし
まい、この検波信号の希望波電力対干渉波電力比のオフ
セットを解消することが重要な技術的課題となる。In particular, since such an offset is constantly generated, when the output power of a mobile station is controlled using the measured power ratio in a CDMA communication system, the mobile station always generates the offset. The problem that excessive power is output or the actual power is always controlled to be low occurs, and the offset of the desired signal power to interference wave power ratio of the detected signal is eliminated. This is an important technical issue.
【０００７】なお、従来の他の要因によるオフセットを
解消する場合と同様にいわゆるフィードバック制御用の
アウターループを設けてこれを解消することも考えられ
るが、構成が複雑になってしまうなどの二次的な不都合
が生じてしまう。また、閉ループ制御では必然的に制御
遅れが生じるため、その分、移動局の出力電力制御のリ
アルタイム性が損なわれてしまいその追従性が低下して
しまう。その結果、ＣＤＭＡ方式の通信システムにおい
て、移動局における余分な電力を効果的に削減したり、
安定性、電送品質、システム容量を効果的に向上させる
ことはできない。[0007] It is conceivable to provide an outer loop for so-called feedback control in the same manner as in the case of eliminating the offset due to other factors in the related art, but this problem can be solved. Inconvenience occurs. In addition, since the control delay is inevitably caused in the closed loop control, the real-time property of the output power control of the mobile station is impaired and the follow-up property is reduced. As a result, in a CDMA communication system, excess power in a mobile station can be effectively reduced,
Stability, transmission quality, and system capacity cannot be effectively improved.
【０００８】また、上記離散値の個数Ｎａｖを増加させ
ることでこのオフセットを減少させることも考えられる
が、このような方法ではオフセットを完全に取り除くこ
とができないばかりか、今度は離散値の個数Ｎａｖを確
保するために１回の動作時間（検出周期）が長くなって
しまい、希望波電力対干渉波電力比の更新周期が長期化
してしまうので、移動局の出力電力制御のリアルタイム
性や追従性が損なわれてしまう。その結果、ＣＤＭＡ方
式の通信システムにおいて、移動局における余分な電力
を効果的に削減したり、安定性、電送品質、システム容
量を効果的に向上させることはできない。It is conceivable to reduce the offset by increasing the number Nav of the discrete values. However, such a method cannot completely remove the offset, and this time, the number Nav of the discrete values can be reduced. One operation time (detection cycle) is prolonged in order to secure the frequency, and the update cycle of the desired signal power / interference wave power ratio is prolonged. Is impaired. As a result, in a CDMA communication system, it is not possible to effectively reduce excess power in a mobile station or to effectively improve stability, transmission quality, and system capacity.
【０００９】この発明は上記のような課題を解決するた
めになされたもので、構成の複雑化を招いたり、この検
波信号の希望波電力対干渉波電力比を用いた制御のリア
ルタイム性を損なってしまうことなく上記オフセットを
確実に減少させることができ、ひいてはＣＤＭＡ方式の
通信システムにおいて移動局における余分な電力を効果
的に削減したり、安定性、電送品質、システム容量を効
果的に向上させることができる検波信号の希望波電力対
干渉波電力比測定装置およびその方法を得ることを目的
とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and thus the structure is complicated and the real-time control of the detected signal using the desired signal power to interference signal power ratio is impaired. The above-mentioned offset can be surely reduced without causing the above problem, and thus, in a CDMA communication system, excess power in a mobile station can be effectively reduced, and stability, transmission quality, and system capacity can be effectively improved. It is an object of the present invention to provide an apparatus and a method for measuring a desired signal power to interference wave power ratio of a detected signal.
【００１０】[0010]
【課題を解決するための手段】この発明に係る検波信号
の希望波電力対干渉波電力比測定装置は、検波した信号
が入力され、この検波信号から情報変調成分を取り除い
て逆変調信号を生成する逆変調手段と、上記逆変調信号
が入力され、この逆変調信号から得られる複数の離散値
に基づいて当該逆変調信号の平均値を演算し、かつ該平
均値の絶対値の二乗値を演算して希望波電力値として出
力する希望波電力演算手段と、上記逆変調信号が入力さ
れ、上記希望波電力演算手段と同じ複数の離散値に基づ
いて当該逆変調信号の分散値を演算し、この分散値を干
渉波電力値として出力する干渉波電力演算手段と、上記
希望波電力値および上記干渉波電力値が入力され、この
希望波電力値と干渉波電力値との比を電力比測定値とし
て出力する電力比演算手段と、上記電力比測定値が入力
され、上記離散値の個数に応じたオフセット補正処理を
行って、それを電力比補正値として出力する電力比補正
手段とを備え、上記電力比補正値を上記検波信号の希望
波電力対干渉波電力比として出力するものである。According to the present invention, a desired signal power to interference signal power ratio measuring apparatus for a detected signal receives a detected signal, and removes an information modulation component from the detected signal to generate an inverse modulation signal. Inverse modulation means, and the inverse modulation signal is input, an average value of the inverse modulation signal is calculated based on a plurality of discrete values obtained from the inverse modulation signal, and a square value of an absolute value of the average value is calculated. A desired wave power calculating means for calculating and outputting as a desired wave power value, and the inverse modulation signal are inputted, and a variance value of the inverse modulation signal is calculated based on the same plurality of discrete values as the desired wave power calculating means. An interference wave power calculating means for outputting the variance value as an interference wave power value, and the desired wave power value and the interference wave power value are inputted, and a ratio between the desired wave power value and the interference wave power value is calculated as a power ratio. Power ratio output as measured value And a power ratio correction unit that receives the power ratio measurement value, performs offset correction processing according to the number of the discrete values, and outputs it as a power ratio correction value. Is output as the ratio of the desired signal power to the interference signal power of the detection signal.
【００１１】この発明に係る検波信号の希望波電力対干
渉波電力比測定装置は、電力比補正手段が、離散値の個
数をＮａｖとした場合に、下記式３を用いて希望波電力
対干渉波電力比の補正値を演算するものである。The desired signal power to interference signal power ratio measuring apparatus according to the present invention is characterized in that the power ratio correction means uses the following equation 3 to calculate the desired signal power to interference signal when the number of discrete values is Nav. The correction value of the wave power ratio is calculated.
【００１２】 電力比補正値 ＝ ｛（Ｎａｖ−１）／Ｎａｖ｝×（電力比測定値）−１ ／Ｎａｖ ・・・式３Power ratio correction value = {(Nav−1) / Nav} × (measured power ratio) −1 / Nav Equation 3
【００１３】この発明に係る検波信号の希望波電力対干
渉波電力比測定方法は、検波信号から情報変調成分を取
り除いた逆変調信号の複数の離散値から当該逆変調信号
の平均値の絶対値を二乗した二乗値と分散値とを演算
し、当該二乗値と分散値との比から電力比測定値を演算
し、更に、この電力比測定値に対して上記離散値の個数
に応じたオフセット補正処理を行って、その補正された
電力比測定値を上記検波信号の希望波電力対干渉波電力
比として出力するものである。A method for measuring a desired signal power to an interference signal power ratio of a detected signal according to the present invention is the method of measuring the absolute value of the average value of the inverse modulated signal from a plurality of discrete values of the inverse modulated signal obtained by removing the information modulation component from the detected signal. To calculate the power ratio measurement value from the ratio of the square value and the variance value, and further calculate an offset corresponding to the number of the discrete values with respect to this power ratio measurement value. A correction process is performed, and the corrected power ratio measurement value is output as a desired signal power to interference wave power ratio of the detection signal.
【００１４】この発明に係る検波信号の希望波電力対干
渉波電力比測定方法は、二乗値と分散値との演算に用い
られる離散値の個数をＮａｖとした場合に、下記式４を
用いてオフセット補正処理を行うものである。In the method for measuring a desired signal power / interference signal power ratio of a detection signal according to the present invention, when the number of discrete values used for calculating a square value and a variance value is Nav, the following equation 4 is used. The offset correction processing is performed.
【００１５】 電力比補正値 ＝ ｛（Ｎａｖ−１）／Ｎａｖ｝×（電力比測定値）−１ ／Ｎａｖ ・・・式４Power ratio correction value = {(Nav−1) / Nav} × (measured power ratio) −1 / Nav Equation 4
【００１６】[0016]
【発明の実施の形態】以下、この発明の実施の一形態に
ついて説明する。 実施の形態１．図１はこの発明の実施の形態１による検
波信号の希望波電力対干渉波電力比測定装置の構成を示
すブロック図である。図において、１は検波器などから
無線信号などに基づいて出力される復調シンボル（検波
信号）、２はこの復調シンボル１が入力され、この復調
シンボル１から上記データ系列による情報変調成分を取
り除いて、情報変調成分を除かれた復調シンボルを生成
し、逆変調信号として出力する逆変調手段、３はこの逆
変調手段２の出力する逆変調信号である情報変調成分の
取り除かれた復調シンボルが入力され、上記データＮａ
ｖ個分に相当する期間の上記復調シンボル（複数の離散
値）の平均値をコヒーレントに平均化するように演算
し、これを平均値信号として出力する平均化手段（希望
波電力演算手段）、４はこの平均化手段３の出力する平
均値信号が入力され、これの絶対値を二乗して希望波電
力を出力する二乗化手段（希望波電力演算手段）であ
る。また、５は上記逆変調信号である情報変調成分の除
かれた復調シンボルと上記平均値信号とが入力され、上
記データＮａｖ個分に相当する期間の上記情報変調成分
の除かれた復調シンボルにおける平均化手段３から入力
される平均値信号に対する分散値を演算し、これを干渉
波電力として出力する分散演算手段（干渉波電力演算手
段）である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a block diagram showing a configuration of a desired signal power to interference signal power ratio measuring device of a detection signal according to Embodiment 1 of the present invention. In the figure, 1 is a demodulated symbol (detected signal) output from a detector or the like based on a radio signal or the like, 2 is a demodulated symbol 1 input, and removes an information modulation component due to the data sequence from the demodulated symbol 1. An inverse modulation means for generating a demodulated symbol from which the information modulation component has been removed and outputting the demodulated symbol as an inverse modulation signal; And the data Na
averaging means (desired wave power calculating means) for calculating an average value of the demodulated symbols (a plurality of discrete values) for a period corresponding to v so as to average them coherently and outputting this as an average signal; Reference numeral 4 denotes a squaring means (desired wave power calculating means) which receives the average signal output from the averaging means 3 and squares its absolute value to output the desired wave power. Reference numeral 5 denotes a demodulated symbol from which the information modulation component, which is the inverse modulation signal, is removed and the average value signal is input, and the demodulation symbol from which the information modulation component is removed in a period corresponding to the data Nav is provided. Dispersion calculating means (interference wave power calculating means) for calculating a variance value for the average signal input from the averaging means 3 and outputting the calculated variance value as interference wave power.
【００１７】そして、二乗化手段４から出力されるデー
タＮａｖ個分に相当する期間の上記平均値信号の絶対値
の二乗平均値は、当該期間における復調シンボル１の信
号成分の電力値、すなわちＣＤＭＡ方式の通信システム
においては希望波の信号成分の受信電力値に相当するも
のであり、分散演算手段５から出力されるデータＮａｖ
個分に相当する期間の上記情報成分が除かれた復調シン
ボルの分散値は、当該区間における復調シンボル１の雑
音成分の電力値、すなわちＣＤＭＡ方式の通信システム
においては希望波以外の信号成分（つまり符号の相互関
数に起因する干渉波成分など）の受信電力値に相当する
ものである。The mean square value of the absolute value of the average signal during the period corresponding to the data Nav output from the squaring means 4 is the power value of the signal component of the demodulated symbol 1 in the period, that is, CDMA. In the communication system of the system, the data Nav corresponds to the received power value of the signal component of the desired wave,
The variance of the demodulated symbol from which the information component has been removed during the period corresponding to the individual component is the power value of the noise component of the demodulated symbol 1 in the section, that is, the signal component other than the desired wave (that is, the signal component in the CDMA communication system). (E.g., an interference wave component caused by a code mutual function).
【００１８】また、６は上記希望波電力および上記分散
波電力が入力され、この希望波電力の値を干渉波電力の
値で割った値を電力比測定値として出力するＳＩＲ算出
手段（電力比演算手段）、７はこの電力比測定値が入力
され、下記式５に基づいてオフセット補正処理を行っ
て、それを電力比補正値として出力するＳＩＲ補正手段
（電力比演算手段）、８は当該装置から復調シンボル１
の希望波電力対干渉波電力比として出力される電力比補
正値（検波信号の希望波電力対干渉波電力比）である。Reference numeral 6 denotes an SIR calculating means (power ratio) that receives the desired wave power and the dispersed wave power and outputs a value obtained by dividing the desired wave power value by the interference wave power value as a power ratio measurement value. SIR correction means (power ratio calculation means) which receives the power ratio measurement value, performs offset correction processing based on the following equation 5, and outputs the result as a power ratio correction value, and 8 Demodulated symbol 1 from device
The power ratio correction value (the ratio of the desired signal power to the interference signal power of the detected signal) is output as the desired signal power to interference signal power ratio.
【００１９】 電力比補正値 ＝ ｛（Ｎａｖ−１）／Ｎａｖ｝×（電力比測定値）−１ ／Ｎａｖ ・・・式５Power ratio correction value = {(Nav−1) / Nav} × (measured power ratio) −1 / Nav Equation 5
【００２０】次に動作について説明する。復調シンボル
１が逆変調手段２に入力されると、この逆変調手段２は
逆変調を行い情報変調成分の除かれた復調シンボルを出
力する。そして、データＮａｖ個分に相当する期間の上
記復調シンボルが出力される毎に、平均化手段３はその
期間における平均値を演算し、二乗化手段４はその期間
における平均値を絶対値をとって二乗し、分散演算手段
５はその期間における分散値を演算する。また、ＳＩＲ
算出手段６はこの二乗平均値を分散値で割って電力比測
定値を算出し、ＳＩＲ補正手段７は、この電力比測定値
を上記式５に代入して電力比補正値８を生成し、この電
力比補正値８が復調シンボル１の希望波電力対干渉波電
力比として出力される。Next, the operation will be described. When the demodulation symbol 1 is input to the inverse modulation means 2, the inverse modulation means 2 performs inverse modulation and outputs a demodulated symbol from which information modulation components have been removed. Each time the demodulated symbols for a period corresponding to the number of data Nav are output, the averaging means 3 calculates the average value in that period, and the squaring means 4 calculates the absolute value of the average value in that period. And the variance calculating means 5 calculates the variance value in the period. Also, SIR
The calculating means 6 calculates the power ratio measurement value by dividing the mean square value by the variance value, and the SIR correction means 7 substitutes the measured power ratio value into the above equation 5 to generate a power ratio correction value 8, This power ratio correction value 8 is output as the ratio of the desired signal power to the interference signal power of demodulated symbol 1.
【００２１】なお、情報変調成分の除かれた復調シンボ
ルは、復調シンボル１を（Ｒｉ＋ｊＲｑ）、その復調シ
ンボル１の情報変調値を（Ｐｉ＋ｊＰｑ）とした場合、
「（Ｒｉ＋ｊＲｑ）・（Ｐｉ−ｊＰｑ）」で求めること
ができる。また、この逆変調を行う情報変調値（Ｐｉ＋
ｊＰｑ）が未知である場合には、この復調シンボル１
（Ｒｉ＋ｊＲｑ）自身から情報変調値（Ｐｉ＋ｊＰｑ）
を判定し、その判定により得られた情報変調値（Ｐｉ＋
ｊＰｑ）を用いるようにすればよい。The demodulated symbols from which the information modulation component has been removed are as follows: when the demodulation symbol 1 is (Ri + jRq) and the information modulation value of the demodulation symbol 1 is (Pi + jPq),
It can be obtained by “(Ri + jRq) · (Pi−jPq)”. The information modulation value (Pi +
jPq) is unknown, this demodulated symbol 1
From (Ri + jRq) itself, the information modulation value (Pi + jPq)
Is determined, and the information modulation value (Pi +
jPq) may be used.
【００２２】図２はこの発明の実施の形態１の希望波電
力対干渉波電力比測定装置において、４つのデータ（Ｎ
ａｖ＝４）に相当する期間の情報変調成分の除かれた復
調シンボルに基づいて得られる電力比測定値と、この電
力比測定値を上記式５に基づいて補正して得られる電力
比補正値とを示す特性線図である。図において、横軸は
無限個のデータからなる復調シンボル１に基づいて得ら
れる理論値、縦軸は上記有限個Ｎａｖのデータからなる
復調シンボル１に基づいて得られる値、９は電力比測定
値の特性線、１０は電力比補正値の特性線である。そし
て、同図においては原点（０，０）をとおってリニアに
増加する特性であれば、上記有限個Ｎａｖのデータを使
用することに基づく理論値との誤差がないものと判断す
ることができるものであり、同図に示すように電力比補
正値はほぼこの好適な特性となっている。FIG. 2 shows four data (N) in the desired signal power to interference wave power ratio measuring apparatus according to the first embodiment of the present invention.
av = 4) A power ratio measurement value obtained based on the demodulated symbol from which the information modulation component has been removed in a period corresponding to the power ratio correction value, and a power ratio correction value obtained by correcting the power ratio measurement value based on Equation 5 above. FIG. In the figure, the horizontal axis represents the theoretical value obtained based on the demodulated symbol 1 composed of infinite number of data, the vertical axis represents the value obtained based on the demodulated symbol 1 composed of the finite number of data Nav, and 9 represents the measured power ratio. Are the characteristic lines of the power ratio correction value. In the figure, if the characteristic increases linearly through the origin (0, 0), it can be determined that there is no error from the theoretical value based on the use of the finite number of Nav data. In this case, the power ratio correction value has almost this preferable characteristic as shown in FIG.
【００２３】次に上記式５によるオフセット抑制効果に
ついてＣＤＭＡ方式の通信システムを例に詳しく説明す
る。Next, the effect of suppressing the offset by the above equation (5) will be described in detail using a CDMA communication system as an example.
【００２４】シンボル数をＮａｖ、希望波の電力をＳ
（ｔｒｕｅ）、希望波電力における残留干渉波成分の電
力をσ２ ／Ｎａｖとした場合、上記希望波電力Ｓ（ｍ
ｅｓ）は下記式６のように表され、また、上記干渉波電
力Ｉ（ｍｅｓ）は下記式７のように表される。従って、
測定値に基づく希望波電力対干渉波電力比ＳＩＲ（ｍｅ
ｓ）は下記式８のように表され、希望波電力および干渉
波電力がどのような場合においても少なくとも理論値
「Ｓ（ｔｒｕｅ）／σ２」よりも下記式９の分だけ大き
な値となってしまう。なお、ここでは干渉波の振幅分布
は正規分布と仮定している。The number of symbols is Nav, and the power of the desired wave is S
(True), when the power of the residual interference wave component in the desired signal power is σ 2 / Nav, the desired signal power S (m
es) is expressed by the following equation 6, and the interference wave power I (mes) is expressed by the following equation 7. Therefore,
Desired wave power to interference wave power ratio SIR (me
s) is expressed by the following equation 8, and in any case, the desired signal power and the interference signal power are values that are at least larger than the theoretical value “S (true) / σ 2 ” by the following equation 9. Would. Here, the amplitude distribution of the interference wave is assumed to be a normal distribution.
【００２５】 Ｓ（ｍｅｓ） ＝ Ｓ（ｔｒｕｅ）＋σ２ ／Ｎａｖ ・・・式６ Ｉ（ｍｅｓ） ＝ σ２ −σ２ ／Ｎａｖ ・・・式７ ＳＩＲ（ｍｅｓ） ＝ ｛Ｎａｖ／（Ｎａｖ−１）｝×Ｓ（ｔｒｕｅ） ／σ２ ＋１／（Ｎａｖ−１） ・・・式８ １０ｌｏｇ｛Ｎａｖ／（Ｎａｖ−１）｝［ｄＢ］ ・・・式９S (mes) = S (true) + σ 2 / Nav Equation 6 I (mes) = σ 2 −σ 2 / Nav Equation 7 SIR (mes) = ｛Nav / (Nav−1) )｝ × S (true) / σ 2 + 1 / (Nav-1) Equation 8 10 log {Nav / (Nav-1)} [dB] Equation 9
【００２６】そして、この実施の形態１では、式８を式
５に代入すれは明らかなように、この希望波電力対干渉
波電力比の理論値に対する測定値の誤差を完全に補正す
ることができ、有限なデータに基づいて電力比測定値を
求めた場合であってもそのオフセットを解消することが
できる。In the first embodiment, it is clear that equation 8 is substituted into equation 5, so that the error of the measured value with respect to the theoretical value of the desired signal power to interference signal power ratio can be completely corrected. Even if the power ratio measurement value is obtained based on finite data, the offset can be eliminated.
【００２７】以上のように、この実施の形態１によれ
ば、復調シンボル１のデータＮａｖ個分の離散値に基づ
いて当該復調シンボル１の電力比測定値を生成するため
の逆変調手段２、平均化手段３、二乗化手段４、分散演
算手段５、ＳＩＲ算出手段６とともに、この復調シンボ
ル１の電力比測定値と上記式５とに基づいて当該離散値
の個数Ｎａｖに応じたオフセット補正処理を行うＳＩＲ
補正手段７を設け、このＳＩＲ補正手段７から出力され
る電力比補正値を上記検波信号の希望波電力対干渉波電
力比８として出力するようにしたので、上記Ｎａｖ個の
離散値に基づく上記電力比測定値と無限の離散値に基づ
く理論値との間の定常的なオフセットをＳＩＲ補正手段
７で解消することができる。As described above, according to the first embodiment, the inverse modulation means 2 for generating the power ratio measurement value of the demodulated symbol 1 based on the discrete values of the data Nav of the demodulated symbol 1, Together with the averaging means 3, the squaring means 4, the variance calculating means 5, and the SIR calculating means 6, based on the power ratio measurement value of the demodulated symbol 1 and the above equation 5, the offset correction processing according to the number Nav of the discrete values SIR that performs
The correction means 7 is provided, and the power ratio correction value output from the SIR correction means 7 is output as the desired signal power to interference wave power ratio 8 of the detection signal. The stationary offset between the measured power ratio value and the theoretical value based on the infinite discrete value can be eliminated by the SIR correction means 7.
【００２８】この実施の形態１によれば、復調シンボル
１の複数の離散値からその平均値の絶対値をとった二乗
値と分散値とを演算し、当該二乗値と分散値との比から
電力比測定値を演算し、更に、この電力比測定値に対し
て上記離散値の個数Ｎａｖに応じたオフセット補正処理
を行って、その補正された電力比測定値を上記復調シン
ボル１の希望波電力対干渉波電力比として出力するの
で、上記Ｎａｖ個の離散値に基づく上記電力比測定値と
無限の離散値に基づく理論値との間の定常的なオフセッ
トを解消することができる。According to the first embodiment, the variance value and the square value obtained by taking the absolute value of the average value from a plurality of discrete values of demodulated symbol 1 are calculated, and the ratio between the square value and the variance value is calculated. A power ratio measurement value is calculated, and an offset correction process is performed on the power ratio measurement value in accordance with the number of discrete values Nav, and the corrected power ratio measurement value is converted to a desired signal of the demodulated symbol 1. Since the output is performed as the power-to-interference-wave power ratio, a stationary offset between the measured power ratio based on the Nav discrete values and the theoretical value based on infinite discrete values can be eliminated.
【００２９】従って、従来のようにアウターループを設
けたり、データの個数Ｎａｖを増加させたりすることな
く上記オフセットを削減することができるので、構成の
複雑化を招いたり、この復調シンボル１の希望波電力対
干渉波電力比を用いた制御のリアルタイム性を損なって
しまうことなく上記オフセットを確実に解消することが
でき、ひいてはＣＤＭＡ方式の通信システムにおいて移
動局における余分な電力の発生を防止したり、安定性、
電送品質、システム容量を効果的に向上させることがで
きる効果がある。Therefore, the offset can be reduced without providing an outer loop or increasing the number of data Nav as in the prior art, thereby complicating the configuration or making the demodulated symbol 1 desired. The above offset can be reliably eliminated without impairing the real-time property of the control using the wave power to interference wave power ratio, thereby preventing the generation of extra power in a mobile station in a CDMA communication system. ,Stability,
There is an effect that transmission quality and system capacity can be effectively improved.
【００３０】実施の形態２．図３はこの発明の実施の形
態２による検波信号の希望波電力対干渉波電力比測定装
置の構成を示すブロック図である。図において、１１は
復調シンボル１が入力され、それを各データに相当する
期間毎に絶対値をとって二乗して二乗平均値シンボル信
号を出力する第二の二乗化手段（干渉波電力演算手
段）、１２はこの二乗平均値シンボル信号が入力され、
データＮａｖ個分に相当する期間毎にその平均値を演算
して第二平均値信号として出力する第二の平均化手段
（干渉波電力演算手段）、１３はこの第二平均信号とと
もに二乗化手段４からの二乗平均値信号が入力され、第
二平均信号から二乗平均値信号を減算して減算信号を出
力する減算手段（干渉波電力演算手段）である。これ以
外の構成は実施の形態１と同様であり同一の符号を付し
て説明を省略する。Embodiment 2 FIG. FIG. 3 is a block diagram showing a configuration of a desired signal power to interference signal power ratio measuring device of a detection signal according to Embodiment 2 of the present invention. In the figure, reference numeral 11 denotes a second squaring means (interference wave power calculating means) for receiving a demodulated symbol 1 and taking an absolute value of the demodulated symbol 1 for each data period, squaring the absolute value, and outputting a root mean square symbol signal. ) And 12 are input with the mean square symbol signal,
Second averaging means (interference wave power calculating means) 13 for calculating the average value for each period corresponding to the number of data Nav and outputting it as a second average value signal, 13 is a squaring means together with the second average signal. 4 is a subtraction means (interference wave power calculation means) which receives the root mean square signal from No. 4 and subtracts the root mean square signal from the second average signal to output a subtraction signal. The other configuration is the same as that of the first embodiment, and the same reference numerals are given and the description is omitted.
【００３１】次に動作について説明する。復調シンボル
１が入力されると、第二の二乗化手段１１は各データに
対応する期間毎にその絶対値を二乗して二乗平均値シン
ボル信号を出力する。第二の平均化手段１２は二乗平均
値シンボル信号をデータＮａｖ個分に相当する期間毎に
平均値を演算し、減算手段１３はこの平均値からデータ
Ｎａｖ個分に相当する期間の無変調の波形系列に基づい
て得られた平均値信号を減算して減算信号を出力し、こ
の減算信号が干渉波電力としてＳＩＲ算出手段６に入力
される。これ以外の動作は実施の形態１と同様であり説
明を省略する。Next, the operation will be described. When demodulated symbol 1 is input, second squaring means 11 squares its absolute value for each period corresponding to each data and outputs a root mean square symbol signal. The second averaging means 12 calculates an average value of the mean square symbol signal for each period corresponding to the number of data Nav, and the subtraction means 13 calculates the unmodulated value of the average value from the average value during the period corresponding to the number of data Nav. The average signal obtained based on the waveform sequence is subtracted to output a subtraction signal, and the subtraction signal is input to the SIR calculation means 6 as interference wave power. Other operations are the same as those in the first embodiment, and a description thereof will be omitted.
【００３２】以上のように、この実施の形態２によれ
ば、復調シンボル１のデータＮａｖ個分の離散値に基づ
いて当該復調シンボル１の電力比測定値を生成するため
の逆変調手段２、平均化手段３、二乗化手段４、第二の
二乗化手段１１、第二の平均化手段１２、減算手段１３
とともに、この復調シンボル１の電力比測定値と上記式
５とに基づいて当該離散値の個数Ｎａｖに応じたオフセ
ット補正処理を行うＳＩＲ補正手段７を設け、このＳＩ
Ｒ補正手段７から出力される電力比補正値を上記復調シ
ンボル１の希望波電力対干渉波電力比として出力するよ
うにしたので、上記Ｎａｖ個の離散値に基づく上記電力
比測定値と無限の離散値に基づく理論値との間の定常的
なオフセットをＳＩＲ補正手段７で解消することがで
き、実施の形態１と同様の効果を奏することができる効
果がある。As described above, according to the second embodiment, the inverse modulation means 2 for generating the power ratio measurement value of the demodulated symbol 1 based on the Nav discrete values of the data of the demodulated symbol 1, Averaging means 3, squaring means 4, second squaring means 11, second averaging means 12, subtraction means 13
In addition, SIR correction means 7 for performing offset correction processing according to the number Nav of the discrete values based on the power ratio measurement value of the demodulated symbol 1 and Equation 5 is provided.
Since the power ratio correction value output from the R correction means 7 is output as the desired signal power to interference wave power ratio of the demodulated symbol 1, the power ratio measurement value based on the Nav discrete values and the infinite The steady offset between the theoretical value based on the discrete value and the theoretical value can be eliminated by the SIR correction means 7, and the same effect as in the first embodiment can be obtained.
【００３３】[0033]
【発明の効果】以上のように、この発明によれば、検波
信号から情報変調成分を取り除いた逆変調信号から得ら
れる複数の離散値に基づいて検波信号の電力比測定値を
生成するための逆変調手段、希望波電力演算手段、干渉
波電力演算手段、電力比演算手段とともに、この検波信
号の電力比測定値に対して上記離散値の個数に応じたオ
フセット補正処理を行う電力比補正手段を設け、この電
力比補正手段から出力される電力比補正値を上記検波信
号の希望波電力対干渉波電力比として出力するようにし
たので、上記有限個の離散値に基づく上記電力比測定値
と無限の離散値に基づく理論値との間の定常的なオフセ
ットを電力比補正手段で減少させることができる。As described above, according to the present invention, a power ratio measurement value of a detection signal is generated based on a plurality of discrete values obtained from an inverse modulation signal obtained by removing an information modulation component from a detection signal. A power ratio correction unit that performs an offset correction process on the measured power ratio of the detected signal according to the number of the discrete values, together with the inverse modulation unit, the desired wave power calculation unit, the interference wave power calculation unit, and the power ratio calculation unit. And the power ratio correction value output from the power ratio correction means is output as the desired signal power to interference wave power ratio of the detection signal, so that the power ratio measurement value based on the finite number of discrete values The steady-state offset between the power ratio correction means and the theoretical value based on the infinite discrete value can be reduced by the power ratio correction means.
【００３４】従って、従来のようにフィードバック制御
用のアウターループを設けたり、離散値の個数を増加さ
せたりすることなく上記オフセットを削減することがで
きるので、構成の複雑化を招いたり、この検波信号の希
望波電力対干渉波電力比を用いた制御のリアルタイム性
を損なってしまったりすることなく上記オフセットを確
実に減少させることができ、ひいてはＣＤＭＡ方式の通
信システムにおいて移動局における余分な電力を効果的
に削減したり、安定性、電送品質、システム容量を効果
的に向上させることができる効果がある。Accordingly, the offset can be reduced without providing an outer loop for feedback control or increasing the number of discrete values as in the conventional case, which complicates the configuration or causes the detection. The offset can be reliably reduced without impairing the real-time property of the control using the desired signal power to interference signal power ratio of the signal, and the extra power in the mobile station can be reduced in the CDMA communication system. This has the effect of effectively reducing or effectively improving stability, transmission quality, and system capacity.
【００３５】この発明によれば、電力比補正手段が、上
記式３を用いて希望波電力対干渉波電力比の補正値を演
算するので、従来のようにフィードバック制御用のアウ
ターループを設けたり、離散値の個数を増加させたりす
ることなく上記オフセットを解消することができる。そ
して、このような検波信号の希望波電力対干渉波電力比
測定装置を用いることで、ＣＤＭＡ方式の通信システム
において移動局における余分な電力の発生を防止し、高
い安定性、電送品質、システム容量を確保させることが
できる効果がある。According to the present invention, since the power ratio correction means calculates the correction value of the desired signal power / interference wave power ratio using the above equation (3), an outer loop for feedback control may be provided as in the prior art. The offset can be eliminated without increasing the number of discrete values. By using such a device for measuring a desired signal power to interference signal power ratio of a detected signal, it is possible to prevent generation of extra power in a mobile station in a CDMA communication system, and to achieve high stability, transmission quality, and system capacity. There is an effect that can be ensured.
【００３６】この発明によれば、検波信号から情報成分
を取り除いた逆変調信号の複数の離散値から当該逆変調
信号の平均値の絶対値を二乗した二乗値と分散値とを演
算し、当該二乗平均値と分散値との比から電力比測定値
を演算し、更に、この電力比測定値に対して上記離散値
の個数に応じたオフセット補正処理を行って、その補正
された電力比測定値を上記検波信号の希望波電力対干渉
波電力比として出力するので、上記有限個の離散値に基
づく上記電力比測定値と無限の離散値に基づく理論値と
の間の定常的なオフセットを減少させることができる。According to the present invention, the variance value and the square value obtained by squaring the absolute value of the average value of the inverse modulation signal from a plurality of discrete values of the inverse modulation signal obtained by removing the information component from the detection signal are calculated. A power ratio measurement value is calculated from the ratio of the root mean square value to the variance value. Further, the power ratio measurement value is subjected to an offset correction process according to the number of the discrete values, and the corrected power ratio measurement value is calculated. Since the value is output as a desired signal power to interference wave power ratio of the detection signal, a stationary offset between the power ratio measurement value based on the finite number of discrete values and the theoretical value based on infinite discrete values is calculated. Can be reduced.
【００３７】従って、従来のようにフィードバック制御
用のアウターループ処理を追加したり、離散値の個数を
増加させたりすることなく上記オフセットを削減するこ
とができるので、構成の複雑化を招いたり、この検波信
号の希望波電力対干渉波電力比を用いた制御のリアルタ
イム性を損なってしまったりすることなく上記オフセッ
トを確実に減少させることができ、ひいてはＣＤＭＡ方
式の通信システムにおいて移動局における余分な電力を
効果的に削減したり、安定性、電送品質、システム容量
を効果的に向上させることができる効果がある。Accordingly, the offset can be reduced without adding an outer loop process for feedback control and increasing the number of discrete values as in the related art, resulting in a complicated configuration. The offset can be reliably reduced without impairing the real-time property of the control using the desired signal power to interference signal power ratio of the detection signal, and as a result, in a CDMA communication system, an extra There is an effect that power can be effectively reduced and stability, transmission quality, and system capacity can be effectively improved.
【００３８】この発明によれば、上記式４を用いてオフ
セット補正処理を行うので、従来のようにフィードバッ
ク制御用のアウターループを設けたり、離散値の個数を
増加させたりすることなく上記オフセットを解消するこ
とができる。そして、このような検波信号の希望波電力
対干渉波電力比測定方法を用いることで、ＣＤＭＡ方式
の通信システムにおいて移動局における余分な電力の発
生を防止し、高い安定性、電送品質、システム容量を確
保させることができる効果がある。According to the present invention, since the offset correction processing is performed using the above equation (4), the offset can be corrected without providing an outer loop for feedback control or increasing the number of discrete values as in the prior art. Can be eliminated. By using such a method for measuring the ratio of the desired signal power to the interference signal power of the detected signal, it is possible to prevent the generation of extra power in the mobile station in the CDMA communication system, and to achieve high stability, transmission quality, and system capacity. There is an effect that can be ensured.
【図１】 この発明の実施の形態１による検波信号の希
望波電力対干渉波電力比測定装置の構成を示すブロック
図である。FIG. 1 is a block diagram showing a configuration of a desired signal power to interference signal power ratio measuring device of a detection signal according to a first embodiment of the present invention.
【図２】 この発明の実施の形態１の希望波電力対干渉
波電力比測定装置において、４つのデータ（Ｎａｖ＝
４）に相当する期間の無変調の波形系列に基づいて得ら
れる電力比測定値９と、この電力比測定値を上記式５に
基づいて補正して得られる電力比補正値１０とを示す特
性線図である。FIG. 2 shows four data (Nav =
A characteristic showing a power ratio measurement value 9 obtained based on an unmodulated waveform sequence in a period corresponding to 4) and a power ratio correction value 10 obtained by correcting the power ratio measurement value based on the above equation (5). FIG.
【図３】 この発明の実施の形態２による検波信号の希
望波電力対干渉波電力比測定装置の構成を示すブロック
図である。FIG. 3 is a block diagram showing a configuration of a desired signal power to interference signal power ratio measuring device of a detection signal according to a second embodiment of the present invention.
【図４】 従来の検波信号の希望波電力対干渉波電力比
測定装置の基本的な構成を示すブロック図である。FIG. 4 is a block diagram showing a basic configuration of a conventional apparatus for measuring a desired signal power / interference wave power ratio of a detected signal.
１ 復調シンボル（検波信号）、２ 逆変調手段、３
平均化手段（希望波電力演算手段）、４ 二乗化手段
（希望波電力演算手段）、５ 分散演算手段（干渉波電
力演算手段）、６ ＳＩＲ算出手段（電力比演算手
段）、７ ＳＩＲ補正手段（電力比補正手段）、８ 電
力比補正値（検波信号の希望波電力対干渉波電力比）、
１１ 第二の二乗化手段（干渉波電力演算手段）、１２
第二の平均化手段（干渉波電力演算手段）、１３ 減
算手段（干渉波電力演算手段）。1 demodulated symbol (detected signal), 2 inverse modulation means, 3
Averaging means (desired wave power calculating means), 4 squaring means (desired wave power calculating means), 5 dispersion calculating means (interference wave power calculating means), 6 SIR calculating means (power ratio calculating means), 7 SIR correcting means (Power ratio correction means), 8 power ratio correction value (ratio of desired signal power to interference signal power of detected signal),
11 second squaring means (interference wave power calculating means), 12
Second averaging means (interference wave power calculation means), 13 subtraction means (interference wave power calculation means).
Claims (4)
から情報変調成分を取り除いて逆変調信号を生成する逆
変調手段と、 上記逆変調信号が入力され、この逆変調信号から得られ
る複数の離散値に基づいて当該逆変調信号の平均値を演
算し、かつ該平均値の絶対値の二乗値を演算して希望波
電力値として出力する希望波電力演算手段と、 上記逆変調信号が入力され、上記希望波電力演算手段と
同じ複数の離散値に基づいて当該逆変調信号の分散値を
演算し、この分散値を干渉波電力値として出力する干渉
波電力演算手段と、 上記希望波電力値および上記干渉波電力値が入力され、
この希望波電力値と干渉波電力値との比を電力比測定値
として出力する電力比演算手段と、 上記電力比測定値が入力され、上記離散値の個数に応じ
たオフセット補正処理を行って、それを電力比補正値と
して出力する電力比補正手段とを備え、 上記電力比補正値を上記検波信号の希望波電力対干渉波
電力比として出力する検波信号の希望波電力対干渉波電
力比測定装置。An inverted modulation means for receiving a detected signal, removing an information modulation component from the detected signal to generate an inversely modulated signal, and a plurality of inversely modulated signals which are input and obtained from the inversely modulated signal. Desired wave power calculating means for calculating an average value of the inverse modulation signal based on the discrete value, and calculating a square value of an absolute value of the average value and outputting the calculated value as a desired wave power value; An interference wave power calculation unit that calculates a variance value of the inverse modulation signal based on the same plurality of discrete values as the desired wave power calculation unit, and outputs the variance value as an interference wave power value; Value and the interference wave power value are input,
Power ratio calculating means for outputting the ratio between the desired wave power value and the interference wave power value as a power ratio measurement value, and the power ratio measurement value being input and performing offset correction processing according to the number of the discrete values Power ratio correction means for outputting the same as a power ratio correction value, and outputting the power ratio correction value as a desired signal power to interference wave power ratio of the detection signal. measuring device.
ｖとした場合に、下記式１を用いて希望波電力対干渉波
電力比の補正値を演算することを特徴とする請求項１記
載の検波信号の希望波電力対干渉波電力比測定装置。 電力比補正値 ＝ ｛（Ｎａｖ−１）／Ｎａｖ｝×（電力比測定値）−１ ／Ｎａｖ ・・・式１2. The power ratio correction means sets the number of discrete values to Na
2. The apparatus for measuring a desired signal power / interference wave power ratio of a detection signal according to claim 1, wherein the correction value of the desired signal power / interference wave power ratio is calculated using the following equation (1). Power ratio correction value = {(Nav-1) / Nav} × (Measured power ratio) -1 / Nav Expression 1
逆変調信号の複数の離散値から当該逆変調信号の平均値
の絶対値を二乗した二乗値と分散値とを演算し、当該二
乗値と分散値との比から電力比測定値を演算し、更に、
この電力比測定値に対して上記離散値の個数に応じたオ
フセット補正処理を行って、その補正された電力比測定
値を上記検波信号の希望波電力対干渉波電力比として出
力する検波信号の希望波電力対干渉波電力比測定方法。3. A square value obtained by squaring an absolute value of an average value of the inverse modulation signal and a variance value are calculated from a plurality of discrete values of the inverse modulation signal obtained by removing an information modulation component from a detection signal, and the square value is calculated. Calculate the power ratio measurement value from the ratio with the variance value,
This power ratio measurement value is subjected to offset correction processing according to the number of the discrete values, and the corrected power ratio measurement value is output as the desired signal power to interference wave power ratio of the detection signal. A method of measuring a desired signal power to interference wave power ratio.
散値の個数をＮａｖとした場合に、下記式２を用いてオ
フセット補正処理を行うことを特徴とする請求項３記載
の検波信号の希望波電力対干渉波電力比測定方法。 電力比補正値 ＝ ｛（Ｎａｖ−１）／Ｎａｖ｝×（電力比測定値）−１ ／Ｎａｖ ・・・式２4. The detection signal according to claim 3, wherein when the number of discrete values used in the calculation of the square value and the variance value is Nav, the offset correction processing is performed using the following equation (2). Method of measuring the ratio of the desired signal power to the interference signal power. Power ratio correction value = {(Nav-1) / Nav} × (Measured power ratio) -1 / Nav Expression 2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5174499A JP3589889B2 (en) | 1999-02-26 | 1999-02-26 | Apparatus and method for measuring desired signal power to interference signal power ratio of detected signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5174499A JP3589889B2 (en) | 1999-02-26 | 1999-02-26 | Apparatus and method for measuring desired signal power to interference signal power ratio of detected signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000252926A true JP2000252926A (en) | 2000-09-14 |
| JP3589889B2 JP3589889B2 (en) | 2004-11-17 |
Family
ID=12895445
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5174499A Expired - Fee Related JP3589889B2 (en) | 1999-02-26 | 1999-02-26 | Apparatus and method for measuring desired signal power to interference signal power ratio of detected signal |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002039626A1 (en) * | 2000-11-09 | 2002-05-16 | Matsushita Electric Industrial Co., Ltd. | Desired wave/interference power ratio measuring circuit and desired wave/interference power ratio measuring method |
| WO2004109946A1 (en) * | 2003-06-04 | 2004-12-16 | Matsushita Electric Industrial Co., Ltd. | Sir measurement device and sir measurement method |
| JP4782781B2 (en) * | 2004-06-16 | 2011-09-28 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | SIR estimation in wireless receivers |
-
1999
- 1999-02-26 JP JP5174499A patent/JP3589889B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002039626A1 (en) * | 2000-11-09 | 2002-05-16 | Matsushita Electric Industrial Co., Ltd. | Desired wave/interference power ratio measuring circuit and desired wave/interference power ratio measuring method |
| WO2004109946A1 (en) * | 2003-06-04 | 2004-12-16 | Matsushita Electric Industrial Co., Ltd. | Sir measurement device and sir measurement method |
| JP4782781B2 (en) * | 2004-06-16 | 2011-09-28 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | SIR estimation in wireless receivers |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3589889B2 (en) | 2004-11-17 |
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