JPH11112367A - Estimating device for radio line quality - Google Patents

Abstract

PROBLEM TO BE SOLVED: To estimate the radio line quality in a very short time with high precision while hardly affected by transmission line distortion by detecting a desired signal by performing a correlation process using symbols of a received signal, finding the absolute value of a noise signal from the received signal, and calculating the movement means of the detected desired signal and noise absolute value and then estimating the level of the received signal from their ratio. SOLUTION: A correlation process part 1 performs the correlation process by symbols of the received input signal S consisting of the desired signal P and noise signal N to detect the desired signal A(P). A noise detecting process part 3 subtracts the desired signal A(P) from the input signal S to find a noise component and an absolute value acquiring process part 4 finds the absolute value B(N) of the noise. Movement mean process parts 2 and 5 find the movement means A' and B' of the detected values A(P) and B(N) respectively and a calculating process part 6 finds the ratio A'/B'. Then Eb/N0, i.e., 'movement mean value A' of desired signal A/movement mean value B' of noise N' is outputted as a line quality estimated value S0.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、スペクトル拡散通
信方式における無線回線品質を推定する無線回線品質推
定装置に関する。The present invention relates to a radio channel quality estimating apparatus for estimating radio channel quality in a spread spectrum communication system.

【０００２】[0002]

【従来の技術】図８は、従来の無線回線品質推定装置を
示すブロック図である。図８において、ＡＮＴは電波信
号、たとえば擬似ランダム信号によって拡散された電波
信号を受信し、逆拡散して希望信号を出力するアンテ
ナ、１８はアンテナＡＮＴから出力され、希望信号と雑
音信号から成る受信信号Ｓを増幅するＲＦ（高周波）回
路、１９はＲＳＳＩ（Received Signal Strength Indic
ator）により受信信号のレベルを検知して回線品質推定
信号Ｓ’を出力する受信レベル検知部、２０はＲＦ回路
１８と受信レベル検知部１９とから成る受信機である。2. Description of the Related Art FIG. 8 is a block diagram showing a conventional radio channel quality estimating apparatus. In FIG. 8, an antenna ANT receives a radio signal, for example, a radio signal spread by a pseudo-random signal, and outputs a desired signal by despreading. An antenna 18 is output from the antenna ANT and comprises a desired signal and a noise signal. An RF (high frequency) circuit for amplifying the signal S, 19 is an RSSI (Received Signal Strength Indic)
ator) to detect the level of the received signal and output a channel quality estimation signal S ′, and 20 is a receiver including an RF circuit 18 and a received level detector 19.

【０００３】以上のように構成された無線回線品質推定
装置について、その動作を説明する。[0003] The operation of the radio channel quality estimation device configured as described above will be described.

【０００４】電波を受信して受信信号ＳをアンテナＡＮ
Ｔから出力したとき、ＲＦ回路１８は受信信号Ｓを増幅
し、その増幅した受信信号Ｓは受信レベル検知部１９に
送られる。受信レベル検知部１９は受信信号Ｓのレベル
の検出を行い、その結果を無線回線品質推定信号Ｓ’と
して出力する。この無線回線品質推定信号Ｓ’の示す受
信信号レベルの大きさから無線回線の品質について推定
を行う。After receiving a radio wave, a received signal S is transmitted to an antenna AN.
When the signal is output from T, the RF circuit 18 amplifies the reception signal S, and the amplified reception signal S is sent to the reception level detection unit 19. The reception level detection unit 19 detects the level of the reception signal S, and outputs the result as a radio channel quality estimation signal S ′. From the magnitude of the received signal level indicated by the radio channel quality estimation signal S ', the quality of the radio channel is estimated.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、従来の
無線回線品質推定装置では、干渉により受信信号の品質
劣化が生じている場合においても、受信信号レベルが所
望の値を超えることがあり、無線回線品質の推定に誤差
が生じるという問題点があった。However, in the conventional radio channel quality estimating apparatus, even when the quality of the received signal is deteriorated due to interference, the received signal level may exceed a desired value. There is a problem that an error occurs in quality estimation.

【０００６】この無線回線品質推定装置では、伝送路歪
みに影響されにくく、かつ微小時間内で高精度の無線回
線品質推定が行えることが要求されている。This radio channel quality estimating apparatus is required to be hardly affected by transmission path distortion and to be able to perform highly accurate radio channel quality estimation within a short time.

【０００７】本発明は、伝送路歪みに影響されにくく、
かつ微小時間内で高精度の無線回線品質推定が行える無
線回線品質推定装置を提供することを目的とする。The present invention is less susceptible to transmission line distortion,
It is another object of the present invention to provide a wireless channel quality estimating apparatus capable of performing highly accurate wireless channel quality estimation within a short time.

【０００８】[0008]

【課題を解決するための手段】この課題を解決するため
に本発明の無線回線品質推定装置は、電波信号を受信し
て希望信号と雑音信号とから成る受信信号を出力するア
ンテナと、受信信号の１シンボル毎に相関処理を行って
希望信号を検出する相関処理部と、相関処理部で検出さ
れた複数シンボル分の希望信号に対して移動平均処理を
行って希望信号の移動平均値を求める第１の移動平均処
理部と、受信信号から雑音信号を検出する雑音検出処理
部と、雑音検出処理部で検出した雑音信号の絶対値を計
算する絶対値取得処理部と、絶対値取得処理部で計算さ
れた雑音信号の絶対値に対して移動平均処理を行って雑
音信号の移動平均値を求める第２の移動平均処理部と、
希望信号の移動平均値と雑音信号の移動平均値との比か
ら受信信号のレベルを推定する計算処理部とを有する構
成を備えている。SUMMARY OF THE INVENTION In order to solve this problem, a radio channel quality estimating apparatus according to the present invention comprises: an antenna for receiving a radio signal and outputting a reception signal composed of a desired signal and a noise signal; A correlation processing unit that performs a correlation process for each symbol to detect a desired signal, and performs a moving average process on the desired signals for a plurality of symbols detected by the correlation processing unit to obtain a moving average value of the desired signal A first moving average processing unit, a noise detection processing unit that detects a noise signal from a received signal, an absolute value acquisition processing unit that calculates an absolute value of the noise signal detected by the noise detection processing unit, and an absolute value acquisition processing unit A second moving average processing unit for performing a moving average process on the absolute value of the noise signal calculated in the above to obtain a moving average value of the noise signal;
And a calculation processing unit for estimating the level of the received signal from the ratio of the moving average value of the desired signal to the moving average value of the noise signal.

【０００９】これにより、伝送路歪みに影響されにく
く、かつ微笑時間内で高精度の無線回線品質推定が行え
る無線回線品質推定装置が得られる。Thus, there is provided a radio channel quality estimating apparatus which is hardly affected by transmission line distortion and can perform radio channel quality estimation with high accuracy within a smile time.

【００１０】[0010]

【発明の実施の形態】本発明の請求項１に記載の発明
は、電波信号を受信して希望信号と雑音信号とから成る
受信信号を出力するアンテナと、受信信号の１シンボル
毎に相関処理を行って希望信号を検出する相関処理部
と、相関処理部で検出された複数シンボル分の希望信号
に対して移動平均処理を行って希望信号の移動平均値を
求める第１の移動平均処理部と、受信信号から雑音信号
を検出する雑音検出処理部と、雑音検出処理部で検出し
た雑音信号の絶対値を計算する絶対値取得処理部と、絶
対値取得処理部で計算された雑音信号の絶対値に対して
移動平均処理を行って雑音信号の移動平均値を求める第
２の移動平均処理部と、希望信号の移動平均値と雑音信
号の移動平均値との比から受信信号のレベルを推定する
計算処理部とを有することとしたものであり、受信信号
のレベルは、希望信号の移動平均値と雑音信号の移動平
均値との比という正確に無線回線品質を評価する数値か
ら推定されるという作用を有する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention provides an antenna for receiving a radio signal and outputting a reception signal composed of a desired signal and a noise signal, and a correlation process for each symbol of the reception signal. And a first moving average processing section for performing a moving average process on a plurality of symbols of the desired signal detected by the correlation processing section to obtain a moving average value of the desired signal. A noise detection processing unit that detects a noise signal from the received signal; an absolute value acquisition processing unit that calculates the absolute value of the noise signal detected by the noise detection processing unit; and a noise signal calculation unit that calculates the absolute value of the noise signal. A second moving average processing section for performing a moving average process on the absolute value to obtain a moving average value of the noise signal, and a level of the received signal based on a ratio between the moving average value of the desired signal and the moving average value of the noise signal. Calculation processing unit for estimating It is obtained by and the level of the received signal has the effect that is estimated from the number to evaluate exactly radio channel quality of the ratio of the moving average of the moving average value and the noise signal of the desired signal.

【００１１】請求項２に記載の発明は、電波信号を受信
して希望信号と雑音信号とから成る受信信号を出力する
アンテナと、受信信号の１シンボル毎に相関処理を行っ
て希望信号を検出する相関処理部と、相関処理部で検出
された１シンボル分の希望信号について巡回積分を行っ
て希望信号の巡回積分値を求める第１の巡回積分処理部
と、受信信号から雑音信号を検出する雑音検出処理部
と、雑音検出処理部で検出した雑音信号の絶対値を計算
する絶対値取得処理部と、絶対値取得処理部で計算され
た雑音信号の絶対値について１シンボル分の巡回積分を
行って雑音信号の巡回積分値を求める第２の巡回積分処
理部と、希望信号の巡回積分値と雑音信号の巡回積分値
との比から受信信号のレベルを推定する計算処理部とを
有することとしたものであり、受信信号のレベルは、希
望信号の巡回積分値と雑音信号の巡回積分値との比とい
う正確に無線回線品質を評価する数値から推定されると
いう作用を有する。According to a second aspect of the present invention, there is provided an antenna for receiving a radio signal and outputting a received signal including a desired signal and a noise signal, and detecting a desired signal by performing a correlation process for each symbol of the received signal. A first cyclic integration unit for performing a cyclic integration on the desired signal for one symbol detected by the correlation processing unit to obtain a cyclic integration value of the desired signal, and detecting a noise signal from the received signal A noise detection processing unit, an absolute value acquisition processing unit that calculates an absolute value of the noise signal detected by the noise detection processing unit, and a cyclic integration of one symbol for the absolute value of the noise signal calculated by the absolute value acquisition processing unit. A second cyclic integration processing unit for calculating a cyclic integration value of the noise signal by performing the calculation, and a calculation processing unit for estimating the level of the received signal from the ratio of the cyclic integration value of the desired signal to the cyclic integration value of the noise signal Also , And the level of the received signal has the effect that is estimated from the number to evaluate exactly radio channel quality of the ratio of the cyclic integration value of the cyclic integration values and the noise signal of the desired signal.

【００１２】請求項３に記載の発明は、電波信号を受信
して希望信号と雑音信号とから成る受信信号を出力する
アンテナと、受信信号の１シンボル毎に相関処理を行っ
て希望信号を検出する相関処理部と、１シンボル前の希
望信号の値に加重値を乗算して得られた加重乗算値を現
希望信号に加算することにより希望信号の加重平均値を
求める第１の加重平均処理部と、受信信号から雑音信号
を検出する雑音検出処理部と、雑音検出処理部で検出し
た雑音信号の絶対値を計算する絶対値取得処理部と、１
シンボル前の雑音信号の絶対値に加重値を乗算して得ら
れた加重乗算値を現雑音信号に加算することにより雑音
信号の加重平均値を求める第２の加重平均処理部と、希
望信号の加重平均値と雑音信号の加重平均値との比から
受信信号のレベルを推定する計算処理部とを有すること
としたものであり、受信信号のレベルは、希望信号の加
重平均値と雑音信号の加重平均値との比という正確に無
線回線品質を評価する数値から推定されるという作用を
有する。According to a third aspect of the present invention, there is provided an antenna for receiving a radio signal and outputting a received signal including a desired signal and a noise signal, and detecting a desired signal by performing a correlation process for each symbol of the received signal. And a first weighted averaging process for obtaining a weighted average value of the desired signal by adding a weighted multiplication value obtained by multiplying the value of the desired signal one symbol before by the weight value to the current desired signal. A noise detection processing unit that detects a noise signal from the received signal; an absolute value acquisition processing unit that calculates an absolute value of the noise signal detected by the noise detection processing unit;
A second weighted average processing unit for obtaining a weighted average value of the noise signal by adding a weighted multiplication value obtained by multiplying the absolute value of the noise signal before the symbol by a weight value to the current noise signal; A calculation processing unit for estimating the level of the received signal from the ratio of the weighted average value to the weighted average value of the noise signal. This has the effect of being estimated from a numerical value for accurately evaluating the quality of the radio channel, ie, the ratio to the weighted average value.

【００１３】請求項４に記載の発明は、電波信号を受信
して希望信号と雑音信号とから成る受信信号を出力する
アンテナと、受信信号の１シンボル毎に相関処理を行っ
て希望信号を検出する相関処理部と、相関処理部で検出
された複数シンボル分の希望信号に対して移動平均処理
を行って希望信号の第１の移動平均値を求める第１の移
動平均処理部と、希望信号の第１の移動平均値と受信信
号の値との論理積を行って希望信号の第２の移動平均値
を求める論理回路と、受信信号から雑音信号を検出する
雑音検出処理部と、雑音検出処理部で検出した雑音信号
の絶対値を計算する絶対値取得処理部と、絶対値取得処
理部で計算された雑音信号の絶対値に対して移動平均処
理を行って雑音信号の移動平均値を求める第２の移動平
均処理部と、希望信号の第２の移動平均値と雑音信号の
移動平均値との比から受信信号のレベルを推定する計算
処理部とを有することとしたものであり、受信信号のレ
ベルは、希望信号の第２の移動平均値と雑音信号の移動
平均値との比という正確に無線回線品質を評価する数値
から推定されるという作用を有する。According to a fourth aspect of the present invention, there is provided an antenna for receiving a radio signal and outputting a received signal composed of a desired signal and a noise signal, and detecting a desired signal by performing a correlation process for each symbol of the received signal. A first moving average processing section for performing a moving average process on the desired signals for a plurality of symbols detected by the correlation processing section to obtain a first moving average value of the desired signal; A logical circuit for performing a logical product of the first moving average value and the value of the received signal to obtain a second moving average value of the desired signal; a noise detection processing unit for detecting a noise signal from the received signal; An absolute value acquisition processing unit that calculates the absolute value of the noise signal detected by the processing unit; and a moving average process on the absolute value of the noise signal calculated by the absolute value acquisition processing unit to calculate the moving average value of the noise signal. Desired second moving average processing unit and desired And a calculation processing unit for estimating the level of the received signal from the ratio of the second moving average value of the signal to the moving average value of the noise signal. Has the effect of being accurately estimated from a numerical value for accurately evaluating the radio channel quality, ie, the ratio of the moving average value of the noise signal to the moving average value of the noise signal.

【００１４】以下、本発明の実施の形態について、図１
〜図７を用いて説明する。 （実施の形態１）図１は本発明の実施の形態１による無
線回線品質推定装置を示すブロック図であり、図１の無
線回線品質推定装置は図８の受信機２０に対応するもの
である。図１において、１はアンテナ（図示せず）から
出力された希望信号Ｐ（ｉ）と雑音信号Ｎ（ｉ）とから
成る受信信号Ｓ（＝Ｐ（ｉ）＋Ｎ（ｉ））を入力する相
関処理部、２は移動平均処理部、３は受信信号Ｓから雑
音信号Ｎを検出する雑音検出処理部、４は雑音信号Ｎの
絶対値Ｂを計算する絶対値取得処理部、５は移動平均処
理部、６は無線回線品質推定信号ＳＯを出力するＥｂ／
Ｎ０（１シンボル当りのエネルギー／雑音電力密度）計
算処理部である。Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. (Embodiment 1) FIG. 1 is a block diagram showing a radio channel quality estimation device according to Embodiment 1 of the present invention. The radio channel quality estimation device of FIG. 1 corresponds to the receiver 20 of FIG. . In FIG. 1, reference numeral 1 denotes a correlation for inputting a received signal S (= P (i) + N (i)) including a desired signal P (i) and a noise signal N (i) output from an antenna (not shown). Processing unit, 2 is a moving average processing unit, 3 is a noise detection processing unit that detects a noise signal N from the received signal S, 4 is an absolute value acquisition processing unit that calculates the absolute value B of the noise signal N, and 5 is moving average processing , 6 outputs Eb /
N0 (energy per symbol / noise power density) calculation processing unit.

【００１５】図２は図１の無線回線品質推定装置を構成
する移動平均処理部２、５を示す構成図である。図２に
おいて、７は移動平均を取るシンボルの個数分存在する
シフトレジスタ、８はパラレル加算器である。FIG. 2 is a block diagram showing the moving average processing units 2 and 5 constituting the radio channel quality estimating apparatus of FIG. In FIG. 2, reference numeral 7 denotes a shift register corresponding to the number of symbols for which a moving average is obtained, and reference numeral 8 denotes a parallel adder.

【００１６】以上のように構成された無線回線品質推定
装置について、その動作を説明する。The operation of the radio channel quality estimation device configured as described above will be described.

【００１７】白色雑音信号Ｎの影響を受けた受信信号Ｓ
をアンテナから入力したとき、希望信号レベル検出と雑
音信号レベル検出のため受信信号Ｓを２信号に分岐し、
各々を希望信号レベル検出用と雑音レベル検出用として
用いる。希望信号レベル検出用の受信信号Ｓに対して相
関処理部１において相関を取ることで、受信信号Ｓの復
調を行い、希望信号Ａ（すなわち希望信号Ｐ）を得る。
そして、図２に示す移動平均処理部２において、復調さ
れた受信信号としての希望信号Ａの値を順次シフトレジ
スタ７に入力し、それぞれ同じ位置にあるシフトレジス
タの値をパラレル加算器８によりパラレル加算すること
で、希望信号の移動平均値Ａ’を求める。また、雑音レ
ベル検出用の受信信号Ｓは希望信号Ａ除去のため、相関
処理部１によって復調された受信信号Ｓとしての希望信
号Ａを用いて希望信号Ａを除去し、雑音信号Ｎのみとす
る。この雑音信号Ｎを絶対値取得処理部４に入力して雑
音信号Ｎの絶対値Ｂを求め、更に移動平均処理部５によ
って希望信号Ａの移動平均値Ａ’を求めた方法と同じ処
理を行い、雑音信号Ｎの移動平均値Ｂ’を求め、雑音信
号Ｎの移動平均値Ｂ’と希望信号Ａの移動平均値Ａ’を
Ｅｂ／Ｎ０計算処理部６に入力し、Ｅｂ／Ｎ０すなわち
（希望信号Ａの移動平均値Ａ’／雑音信号Ｎの移動平均
値Ｂ’）を求め、これを無線回線品質推定信号ＳＯとし
て出力する。The received signal S affected by the white noise signal N
Is input from the antenna, the received signal S is branched into two signals for detecting a desired signal level and a noise signal level,
Each is used for detecting a desired signal level and for detecting a noise level. The correlation processing section 1 obtains a correlation with the received signal S for detecting the desired signal level, thereby demodulating the received signal S to obtain a desired signal A (that is, a desired signal P).
Then, in the moving average processing unit 2 shown in FIG. 2, the value of the desired signal A as a demodulated received signal is sequentially input to the shift register 7, and the values of the shift registers at the same positions are respectively processed in parallel by the parallel adder 8. By adding, a moving average value A 'of the desired signal is obtained. In order to remove the desired signal A from the received signal S for noise level detection, the desired signal A is removed by using the desired signal A as the received signal S demodulated by the correlation processing unit 1 to leave only the noise signal N. . The noise signal N is input to the absolute value acquisition processing unit 4 to calculate the absolute value B of the noise signal N, and the moving average processing unit 5 performs the same processing as the method of calculating the moving average value A 'of the desired signal A. , A moving average value B ′ of the noise signal N, and a moving average value B ′ of the noise signal N and a moving average value A ′ of the desired signal A are input to the Eb / N0 calculation processing unit 6, and Eb / N0, that is, The moving average value A ′ of the signal A / the moving average value B ′ of the noise signal N) is obtained, and this is output as the radio channel quality estimation signal SO.

【００１８】以上のように本実施の形態によれば、複数
個シンボル分の信号から無線回線品質推定のためのＥｂ
／Ｎ０の計算ができるため微小時間での無線回線品質の
推定ができる。また、この処理を連続して行うことでよ
り精度の高い無線回線品質推定が可能となる。すなわ
ち、希望信号Ａの移動平均値Ａ’と雑音信号Ｎの移動平
均値Ｂ’との比という正確に無線回線品質を評価するこ
とができる数値を用いることで、無線回線品質推定の精
度を高めることができる。As described above, according to the present embodiment, Eb for estimating radio channel quality from signals for a plurality of symbols is used.
Since / N0 can be calculated, it is possible to estimate the radio channel quality in a short time. Further, by performing this process continuously, it is possible to estimate the radio channel quality with higher accuracy. That is, the accuracy of the radio channel quality estimation is improved by using a numerical value that can accurately evaluate the radio channel quality, that is, the ratio of the moving average value A ′ of the desired signal A to the moving average value B ′ of the noise signal N. be able to.

【００１９】（実施の形態２）図３は本発明の実施の形
態２による無線回線品質推定装置を示すブロック図であ
り、図３の無線回線品質推定装置は図８の受信機２０に
対応するものである。図３において、相関処理部１、雑
音検出処理部３、絶対値取得処理部４、Ｅｂ／Ｎ０計算
処理部６は図１と同様のものなので、同一符号を付し、
説明は省略する。９は希望信号Ａ（Ｐ）の巡回積分処理
部、１０は雑音信号Ｎの巡回積分処理部である。(Embodiment 2) FIG. 3 is a block diagram showing a radio channel quality estimation apparatus according to Embodiment 2 of the present invention. The radio channel quality estimation apparatus of FIG. 3 corresponds to the receiver 20 of FIG. Things. In FIG. 3, the correlation processing unit 1, the noise detection processing unit 3, the absolute value acquisition processing unit 4, and the Eb / N0 calculation processing unit 6 are the same as those in FIG.
Description is omitted. Reference numeral 9 denotes a cyclic integration processing unit for the desired signal A (P), and reference numeral 10 denotes a cyclic integration processing unit for the noise signal N.

【００２０】図４は図３の無線回線品質推定装置を構成
する巡回積分処理部９、１０を示す構成図である。図４
において、１１は１シンボル中に存在するチップ数だけ
存在するシフトレジスタである。FIG. 4 is a block diagram showing the cyclic integration processing units 9 and 10 constituting the radio channel quality estimating apparatus of FIG. FIG.
In the above, reference numeral 11 denotes a shift register having the number of chips existing in one symbol.

【００２１】以上のように構成された無線回線品質推定
装置について、その動作を説明する。The operation of the radio channel quality estimating apparatus configured as described above will be described.

【００２２】白色雑音信号Ｎの影響を受けた受信信号Ｓ
をアンテナ（図示せず）から入力したとき、希望信号レ
ベル検出と雑音信号レベル検出のため受信信号Ｓを２信
号に分岐し、各々を希望信号レベル検出用と雑音信号レ
ベル検出用として用いる。希望信号レベル検出用の受信
信号Ｓに対して相関処理部１において相関を取ること
で、受信信号Ｓの復調を行い、希望信号Ａを得る。そし
て復調された受信信号Ｓとしての希望信号Ａの値に対し
て、図４に示す巡回積分処理部９において、１シンボル
を構成する１チップ分の値をシフトレジスタ１１に順次
格納し、シフトレジスタ１１の出力信号を希望信号Ａに
加算するフィードバック処理を行うことで巡回積分処理
を行い、１シンボル分のチップ信号が入力されたときに
発生するリセット信号ＲＳが入力される直前の値を希望
信号Ａの巡回積分値Ａ’として求める。Received signal S affected by white noise signal N
Is input from an antenna (not shown), the received signal S is branched into two signals for detecting a desired signal level and a noise signal level, and each of them is used for a desired signal level detection and a noise signal level detection. The correlation processing section 1 obtains a correlation with the received signal S for detecting the desired signal level, thereby demodulating the received signal S and obtaining the desired signal A. Then, for the value of the desired signal A as the demodulated received signal S, the cyclic integration processing section 9 shown in FIG. The cyclic integration process is performed by performing a feedback process of adding the output signal of No. 11 to the desired signal A, and the value immediately before the reset signal RS generated when the chip signal for one symbol is input is input to the desired signal. A is obtained as a cyclic integral value A ′ of A.

【００２３】雑音信号レベル検出用の受信信号Ｓは希望
信号Ａ除去のため、相関処理部１によって復調された受
信信号Ｓとしての希望信号Ａを用いて希望信号Ａを除去
し、雑音信号Ｎのみとする。この雑音信号Ｎを絶対値取
得処理部４に入力して雑音信号Ｎの絶対値Ｂを求める。
更に、図４に示した巡回積分処理部１０において、上記
において求めた希望信号Ａと同じ時間軸における雑音信
号Ｎの絶対値Ｂに対し、上記希望信号Ａの巡回積分値
Ａ’を求めた方法と同じ処理を行って、１シンボル分の
雑音信号Ｎの巡回積分値Ｂ’を求め、この雑音信号Ｎの
巡回積分値Ｂ’と希望信号Ａの巡回積分値Ａ’をＥｂ／
Ｎ０計算処理部６に入力し、Ｅｂ／Ｎ０を求め、これを
無線回線品質推定信号ＳＯとして出力する。In order to remove the desired signal A, the received signal S for noise signal level detection is used to remove the desired signal A using the desired signal A as the received signal S demodulated by the correlation processing section 1, and only the noise signal N is removed. And The noise signal N is input to the absolute value acquisition processing unit 4 to determine the absolute value B of the noise signal N.
Further, a method in which the cyclic integration processing unit 10 shown in FIG. 4 calculates the cyclic integration value A ′ of the desired signal A with respect to the absolute value B of the noise signal N on the same time axis as the desired signal A obtained above. Is performed, a cyclic integral value B 'of the noise signal N for one symbol is obtained, and the cyclic integral value B' of the noise signal N and the cyclic integral value A 'of the desired signal A are calculated by Eb /
It is input to the N0 calculation processing unit 6, calculates Eb / N0, and outputs this as the radio channel quality estimation signal SO.

【００２４】以上のように本実施の形態によれば、１シ
ンボル分の信号から無線回線品質推定のためのＥｂ／Ｎ
０の計算ができるため実施の形態１の場合よりも更に微
小な時間での無線回線品質の推定ができ、更にこの処理
を連続して行うことでより精度の高い回線品質推定が可
能となる。すなわち、希望信号Ａの巡回積分値Ａ’と雑
音信号Ｎの巡回積分値Ｂ’との比という正確に無線回線
品質を評価することができる数値を用いることで、無線
回線品質推定の精度を高めることができる。As described above, according to the present embodiment, Eb / N for estimating radio channel quality from signals for one symbol
Since the calculation of 0 can be performed, the radio channel quality can be estimated in a much shorter time than in the case of the first embodiment. Further, by performing this process continuously, a more accurate channel quality estimation can be performed. That is, the accuracy of the radio channel quality estimation is improved by using a numerical value, which is a ratio of the cyclic integral value A 'of the desired signal A to the cyclic integral value B' of the noise signal N, for accurately evaluating the radio channel quality. be able to.

【００２５】（実施の形態３）図５は本発明の実施の形
態３による無線回線品質推定装置を示すブロック図であ
り、図５の無線回線品質推定装置は図８の受信機２０に
対応するものである。図５において、相関処理部１、雑
音検出処理部３、絶対値取得処理部４、Ｅｂ／Ｎ０計算
処理部６は図１と同様のものなので、同一符号を付し、
説明は省略する。１２は希望信号Ａの加重平均処理部、
１３は雑音信号Ｎの絶対値Ｂの加重平均処理部である。(Embodiment 3) FIG. 5 is a block diagram showing a radio channel quality estimation device according to a third embodiment of the present invention. The radio channel quality estimation device of FIG. 5 corresponds to the receiver 20 of FIG. Things. In FIG. 5, the correlation processing unit 1, the noise detection processing unit 3, the absolute value acquisition processing unit 4, and the Eb / N0 calculation processing unit 6 are the same as those in FIG.
Description is omitted. 12 is a weighted average processing unit for the desired signal A,
Reference numeral 13 denotes a weighted average processing unit for the absolute value B of the noise signal N.

【００２６】図６は図５の無線回線品質推定装置を構成
する加重平均処理部１２、１３を示すブロック図であ
る。図６において、１４は希望信号Ａの加重平均値Ａ’
を１シンボル分遅延させる遅延器、１５は１シンボル分
遅延した加重平均値Ａ’に加重値αを乗算して加重乗算
値を得る乗算器、１６は乗算器１５から出力される加重
乗算値と希望信号Ａとを加算して加重平均値Ａ’を得る
加算器である。FIG. 6 is a block diagram showing the weighted average processing units 12 and 13 constituting the radio channel quality estimating apparatus of FIG. In FIG. 6, reference numeral 14 denotes a weighted average value A 'of the desired signal A.
Is a delay that delays one symbol by one symbol, 15 is a multiplier that obtains a weighted multiplication value by multiplying the weighted average value A ′ delayed by one symbol by a weight value α, and 16 is a weighted multiplication value output from the multiplier 15 and This is an adder that adds the desired signal A to obtain a weighted average value A ′.

【００２７】以上のように構成された無線回線品質推定
装置について、その動作を説明する。The operation of the radio channel quality estimation device configured as described above will be described.

【００２８】白色雑音信号Ｎの影響を受けた受信信号Ｓ
をアンテナ（図示せず）から入力したとき、希望信号レ
ベル検出と雑音レベル検出のため受信信号Ｓを２信号に
分岐し、各々を希望信号レベル検出用と雑音信号レベル
検出用として用いる。希望信号レベル検出用の受信信号
Ｓに対して相関処理部１において相関を取ることで、受
信信号Ｓの復調を行い、希望信号Ａを得る。そして、復
調された受信信号Ｓとしての希望信号Ａの値を図６に示
す加重平均処理部１２において、１シンボルの希望信号
Ａに対し、遅延器１４によって遅延された１シンボル前
の希望信号Ａの加重平均値Ａ’に加重値αを掛けたもの
（加重乗算値）を加算することで、加重平均による希望
信号レベルの値（すなわち加重平均値）Ａ’を求める。Received signal S affected by white noise signal N
Is input from an antenna (not shown), the received signal S is branched into two signals for detecting a desired signal level and a noise level, and each is used for detecting a desired signal level and for detecting a noise signal level. The correlation processing section 1 obtains a correlation with the received signal S for detecting the desired signal level, thereby demodulating the received signal S and obtaining the desired signal A. Then, the weighted average processing unit 12 shown in FIG. 6 compares the demodulated value of the desired signal A as the received signal S with respect to the one-symbol desired signal A delayed one symbol earlier by the delay unit 14. The weighted average value A ′ is multiplied by a weight α and a weighted multiplied value is added to obtain a desired signal level value A ′ (ie, a weighted average value) A ′ based on the weighted average.

【００２９】雑音レベル検出用の受信信号Ｓは希望信号
Ａ除去のため、相関処理部１によって復調された受信信
号Ｓとしての希望信号Ａを用いて雑音検出処理部３で希
望信号Ａが除かれ、雑音信号Ｎのみとなる。この雑音信
号Ｎを絶対値取得処理部４に入力して雑音信号Ｎの絶対
値Ｂを求め、更に，図６に示した加重平均処理部１３を
用いて上記希望信号Ａにおける加重平均の計算と同等の
処理を行い、これによって求められた雑音信号Ｎの絶対
値Ｂの加重平均値Ｂ’と希望信号Ａの加重平均値Ａ’と
をＥｂ／Ｎ０計算処理部６に入力し、Ｅｂ／Ｎ０を求
め、これを無線回線品質推定信号ＳＯとして出力する。In order to remove the desired signal A from the received signal S for noise level detection, the desired signal A is removed by the noise detection processing unit 3 using the desired signal A as the received signal S demodulated by the correlation processing unit 1. , And only the noise signal N. The noise signal N is input to the absolute value acquisition processing unit 4 to determine the absolute value B of the noise signal N. Further, the weighted average of the desired signal A is calculated using the weighted average processing unit 13 shown in FIG. The same processing is performed, and the weighted average value B ′ of the absolute value B of the noise signal N and the weighted average value A ′ of the desired signal A thus obtained are input to the Eb / N0 calculation processing unit 6, and Eb / N0 is calculated. And outputs this as a radio channel quality estimation signal SO.

【００３０】以上のように本実施の形態によれば、１シ
ンボル分の信号から無線回線品質推定のためのＥｂ／Ｎ
０の計算ができるため、より微小時間での通信回線品質
の推定ができ、更に、この処理を連続して行うことでよ
り精度の高い回線品質推定が可能となる。すなわち、希
望信号Ａの加重平均値値Ａ’と雑音信号Ｎの加重平均値
Ｂ’との比という正確に無線回線品質を評価することが
できる数値を用いることで、無線回線品質推定の精度を
高めることができる。As described above, according to the present embodiment, Eb / N for estimating radio channel quality from one symbol signal is used.
Since the calculation of 0 can be performed, the communication line quality can be estimated in a shorter time, and by performing this process continuously, a more accurate line quality estimation can be performed. That is, by using a numerical value that can accurately evaluate the radio channel quality, that is, the ratio between the weighted average value A ′ of the desired signal A and the weighted average value B ′ of the noise signal N, the accuracy of the radio channel quality estimation can be improved. Can be enhanced.

【００３１】（実施の形態４）図７は本発明の実施の形
態４による無線回線品質推定装置を示すブロック図であ
り、図７の無線回線品質推定装置は図８の受信機２０に
対応するものである。図７において、相関処理部１、雑
音検出処理部３、絶対値取得処理部４、移動平均処理部
２、５、Ｅｂ／Ｎ０計算処理部６は図１と同様のものな
ので、同一符号を付し、説明は省略する。１７は相関処
理部１によって復調された受信信号としての希望信号Ａ
と移動平均処理部２によって計算された移動平均値Ａ’
とを論理積演算する論理回路である。(Embodiment 4) FIG. 7 is a block diagram showing a radio channel quality estimation apparatus according to Embodiment 4 of the present invention. The radio channel quality estimation apparatus of FIG. 7 corresponds to the receiver 20 of FIG. Things. 7, the correlation processing unit 1, the noise detection processing unit 3, the absolute value acquisition processing unit 4, the moving average processing units 2, 5, and the Eb / N0 calculation processing unit 6 are the same as those in FIG. The description is omitted. Reference numeral 17 denotes a desired signal A as a received signal demodulated by the correlation processing unit 1.
And the moving average value A ′ calculated by the moving average processing unit 2
Is a logical circuit that performs a logical product operation on.

【００３２】図２は図７の無線回線品質推定装置を構成
する移動平均処理部２、５を示す構成図である。FIG. 2 is a block diagram showing the moving average processing units 2 and 5 constituting the radio channel quality estimating apparatus of FIG.

【００３３】以上のように構成された無線回線品質推定
装置について、その動作を説明する。The operation of the radio channel quality estimation device configured as described above will be described.

【００３４】白色雑音信号Ｎの影響を受けた受信信号Ｓ
をアンテナ（図示せず）から入力したとき、希望信号レ
ベル検出と雑音信号レベル検出のため受信信号Ｓを２信
号に分岐し、各々を希望信号レベル検出用と雑音信号レ
ベル検出用として用いる。希望信号レベル検出用の受信
信号Ｓに対して相関処理部１において相関を取ること
で、受信信号Ｓの復調を行い、希望信号Ａを得る。そし
て、図２に示す移動平均処理部２において、復調された
受信信号Ｓとしての希望信号Ａの値を順次シフトレジス
タ７に入力し、それぞれ同じ位置にあるシフトレジスタ
の値をパラレル加算器８でパラレル加算することで、希
望信号Ａの第１の移動平均値Ａ’を求める。更に、希望
信号レベルの推定精度を上げるために、論理回路１７に
おいて、希望信号Ａの第１の移動平均値Ａ’と復調した
受信信号Ｓつまり希望信号Ａとで論理積演算を行い、希
望信号Ａの第２の移動平均値Ａ’’を求める。The received signal S affected by the white noise signal N
Is input from an antenna (not shown), the received signal S is branched into two signals for detecting a desired signal level and a noise signal level, and each of them is used for a desired signal level detection and a noise signal level detection. The correlation processing section 1 obtains a correlation with the received signal S for detecting the desired signal level, thereby demodulating the received signal S and obtaining the desired signal A. Then, in the moving average processing unit 2 shown in FIG. 2, the value of the desired signal A as the demodulated received signal S is sequentially input to the shift register 7, and the values of the shift registers at the same positions are respectively inputted by the parallel adder 8. By parallel addition, a first moving average value A ′ of the desired signal A is obtained. Further, in order to increase the estimation accuracy of the desired signal level, the logic circuit 17 performs a logical product operation on the first moving average value A ′ of the desired signal A and the demodulated received signal S, that is, the desired signal A, and A second moving average value A ″ of A is obtained.

【００３５】雑音信号レベル検出用の受信信号Ｓは希望
信号Ａ除去のため、相関処理部１によって復調された受
信信号Ｓとしての希望信号Ａを用いて希望信号を除去
し、雑音信号Ｎのみとする。この雑音信号Ｎを絶対値取
得処理部４に入力して雑音信号Ｎの絶対値Ｂを求め、更
に移動平均処理部５によって上記希望信号Ａの第１の移
動平均値Ａ’を求めた方法と同じ処理を行い、雑音信号
Ｎの移動平均値Ｂ’を求め、この雑音信号の移動平均値
Ｂ’と希望信号Ａの第２の移動平均値Ａ’’をＥｂ／Ｎ
０計算処理部８に入力し、Ｅｂ／Ｎ０を求め、これを無
線回線品質推定信号ＳＯとして出力する。The received signal S for noise signal level detection is used to remove the desired signal A by using the desired signal A as the received signal S demodulated by the correlation processing unit 1 to remove the desired signal A. I do. A method in which the noise signal N is input to the absolute value acquisition processing unit 4 to determine the absolute value B of the noise signal N, and the moving average processing unit 5 determines the first moving average value A ′ of the desired signal A. The same processing is performed to obtain a moving average value B ′ of the noise signal N, and the moving average value B ′ of the noise signal and the second moving average value A ″ of the desired signal A are calculated as Eb / N
0 is input to the calculation unit 8 to obtain Eb / N0, which is output as a radio channel quality estimation signal SO.

【００３６】以上のように本実施の形態によれば、複数
個シンボル分の信号から無線回線品質推定のためのＥｂ
／Ｎ０を計算することができ、更に論理回路１７により
最新の受信信号Ｓの希望信号Ａの情報も考慮するため、
より微小時間での通信回線品質の推定がより高精度で行
える。更に、この処理を連続して行うことでより精度の
高い無線回線品質推定が可能となる。すなわち、希望信
号Ａの第２の移動平均値Ａ’’と雑音信号Ｎの移動平均
値Ｂ’との比という正確に無線回線品質を評価すること
ができる数値を用いることで、無線回線品質推定の精度
を高めることができる。As described above, according to the present embodiment, Eb for radio channel quality estimation from signals for a plurality of symbols is used.
/ N0 can be calculated, and the logic circuit 17 also considers the information of the latest desired signal A of the received signal S.
Estimation of communication line quality in a shorter time can be performed with higher accuracy. Further, by performing this processing continuously, it is possible to estimate the radio channel quality with higher accuracy. That is, by using a numerical value, which is a ratio between the second moving average value A ″ of the desired signal A and the moving average value B ′ of the noise signal N, for accurately evaluating the radio channel quality, the radio channel quality estimation is performed. Accuracy can be improved.

【００３７】[0037]

【発明の効果】以上のように本発明の請求項１の無線回
線品質推定装置によれば、電波信号を受信して希望信号
と雑音信号とから成る受信信号を出力するアンテナと、
受信信号の１シンボル毎に相関処理を行って希望信号を
検出する相関処理部と、相関処理部で検出された複数シ
ンボル分の希望信号に対して移動平均処理を行って希望
信号の移動平均値を求める第１の移動平均処理部と、受
信信号から雑音信号を検出する雑音検出処理部と、雑音
検出処理部で検出した雑音信号の絶対値を計算する絶対
値取得処理部と、絶対値取得処理部で計算された雑音信
号の絶対値に対して移動平均処理を行って雑音信号の移
動平均値を求める第２の移動平均処理部と、希望信号の
移動平均値と雑音信号の移動平均値との比から受信信号
のレベルを推定する計算処理部とを有することにより、
受信信号のレベルを、希望信号の移動平均値と雑音信号
の移動平均値との比という正確に無線回線品質を評価す
る数値から推定することができるので、伝送路歪みに影
響されにくく、かつ複数シンボルという微小時間内で高
精度の無線回線品質推定が行えるという有利な効果が得
られる。As described above, according to the radio channel quality estimating apparatus of the first aspect of the present invention, an antenna for receiving a radio signal and outputting a received signal composed of a desired signal and a noise signal;
A correlation processing unit that performs a correlation process for each symbol of the received signal to detect a desired signal; and a moving average process of performing a moving average process on a plurality of symbols of the desired signal detected by the correlation processing unit to obtain a moving average value of the desired signal. A first moving average processing unit for obtaining a noise signal, a noise detection processing unit for detecting a noise signal from the received signal, an absolute value acquisition processing unit for calculating an absolute value of the noise signal detected by the noise detection processing unit, and an absolute value acquisition A second moving average processing unit that performs a moving average process on the absolute value of the noise signal calculated by the processing unit to obtain a moving average value of the noise signal; a moving average value of the desired signal and a moving average value of the noise signal And a calculation processing unit that estimates the level of the received signal from the ratio of
Since the level of the received signal can be estimated from a numerical value for accurately evaluating the radio channel quality, that is, the ratio of the moving average value of the desired signal to the moving average value of the noise signal, the level of the received signal is hardly affected by transmission line distortion, and An advantageous effect is obtained in that highly accurate radio channel quality estimation can be performed within a small time period of a symbol.

【００３８】請求項２に記載の発明によれば、電波信号
を受信して希望信号と雑音信号とから成る受信信号を出
力するアンテナと、受信信号の１シンボル毎に相関処理
を行って希望信号を検出する相関処理部と、相関処理部
で検出された１シンボル分の希望信号について巡回積分
を行って希望信号の巡回積分値を求める第１の巡回積分
処理部と、受信信号から雑音信号を検出する雑音検出処
理部と、雑音検出処理部で検出した雑音信号の絶対値を
計算する絶対値取得処理部と、絶対値取得処理部で計算
された雑音信号の絶対値について１シンボル分の巡回積
分を行って雑音信号の巡回積分値を求める第２の巡回積
分処理部と、希望信号の巡回積分値と雑音信号の巡回積
分値との比から受信信号のレベルを推定する計算処理部
とを有することとしたものであり、受信信号のレベル
を、希望信号の巡回積分値と雑音信号の巡回積分値との
比という正確に無線回線品質を評価する数値から推定す
ることができるので、伝送路歪みに影響されにくく、か
つ１シンボルという微小時間内で高精度の無線回線品質
推定が行えるという有利な効果が得られる。According to the second aspect of the present invention, an antenna for receiving a radio signal and outputting a received signal composed of a desired signal and a noise signal, and performing a correlation process for each symbol of the received signal to obtain a desired signal , A first cyclic integration processing unit for performing a cyclic integration on one symbol of the desired signal detected by the correlation processing unit to obtain a cyclic integration value of the desired signal, and a noise signal from the received signal. A noise detection processing unit for detection, an absolute value acquisition processing unit for calculating an absolute value of the noise signal detected by the noise detection processing unit, and a one-symbol tour of the absolute value of the noise signal calculated by the absolute value acquisition processing unit A second cyclic integration processing unit that performs integration to obtain a cyclic integration value of the noise signal; and a calculation processing unit that estimates the level of the received signal from a ratio between the cyclic integration value of the desired signal and the cyclic integration value of the noise signal. Having and The level of the received signal can be estimated from the ratio of the cyclic integral value of the desired signal to the cyclic integral value of the noise signal, which is a value that accurately evaluates the quality of the radio channel. An advantageous effect is obtained that radio channel quality estimation can be performed with high accuracy within a short time of one symbol.

【００３９】請求項３に記載の発明によれば、電波信号
を受信して希望信号と雑音信号とから成る受信信号を出
力するアンテナと、受信信号の１シンボル毎に相関処理
を行って希望信号を検出する相関処理部と、１シンボル
前の希望信号の値に加重値を乗算して得られた加重乗算
値を現希望信号に加算することにより希望信号の加重平
均値を求める第１の加重平均処理部と、受信信号から雑
音信号を検出する雑音検出処理部と、雑音検出処理部で
検出した雑音信号の絶対値を計算する絶対値取得処理部
と、１シンボル前の雑音信号の絶対値に加重値を乗算し
て得られた加重乗算値を現雑音信号に加算することによ
り雑音信号の加重平均値を求める第２の加重平均処理部
と、希望信号の加重平均値と雑音信号の加重平均値との
比から受信信号のレベルを推定する計算処理部とを有す
ることとしたものであり、受信信号のレベルを、希望信
号の加重平均値と雑音信号の加重平均値との比という正
確に無線回線品質を評価する数値から推定することがで
きるので、伝送路歪みに影響されにくく、かつ１シンボ
ルという微小時間内で高精度の無線回線品質推定が行え
るという有利な効果が得られる。According to the third aspect of the present invention, an antenna for receiving a radio signal and outputting a received signal composed of a desired signal and a noise signal, and performing a correlation process for each symbol of the received signal to obtain a desired signal And a first weight for obtaining a weighted average value of the desired signal by adding a weighted multiplication value obtained by multiplying the value of the desired signal one symbol before by the weight value to the current desired signal. An averaging processing unit, a noise detection processing unit that detects a noise signal from the received signal, an absolute value acquisition processing unit that calculates the absolute value of the noise signal detected by the noise detection processing unit, and an absolute value of the noise signal one symbol before A second weighted average processing unit for obtaining a weighted average value of the noise signal by adding a weighted multiplication value obtained by multiplying the current noise signal to the current noise signal, and a weighted average value of the desired signal and the weighting of the noise signal The ratio of the received signal And a calculation processing unit for estimating the bell, and the level of the received signal is calculated from a value for accurately evaluating the radio channel quality, which is the ratio of the weighted average value of the desired signal to the weighted average value of the noise signal. Since the estimation can be performed, there is obtained an advantageous effect that the wireless channel quality is hardly affected by transmission path distortion and highly accurate radio channel quality estimation can be performed within a short time of one symbol.

【００４０】請求項４に記載の発明によれば、電波信号
を受信して希望信号と雑音信号とから成る受信信号を出
力するアンテナと、受信信号の１シンボル毎に相関処理
を行って希望信号を検出する相関処理部と、相関処理部
で検出された複数シンボル分の希望信号に対して移動平
均処理を行って希望信号の第１の移動平均値を求める第
１の移動平均処理部と、希望信号の第１の移動平均値と
受信信号の値との論理積を行って希望信号の第２の移動
平均値を求める論理回路と、受信信号から雑音信号を検
出する雑音検出処理部と、雑音検出処理部で検出した雑
音信号の絶対値を計算する絶対値取得処理部と、絶対値
取得処理部で計算された雑音信号の絶対値に対して移動
平均処理を行って雑音信号の移動平均値を求める第２の
移動平均処理部と、希望信号の第２の移動平均値と雑音
信号の移動平均値との比から受信信号のレベルを推定す
る計算処理部とを有することとしたものであり、受信信
号のレベルを、希望信号の第２の移動平均値と雑音信号
の移動平均値との比という正確に無線回線品質を評価す
る数値から推定することができるので、伝送路歪みに影
響されにくく、かつ複数シンボルという微小時間内で高
精度の無線回線品質推定が行えるという有利な効果が得
られる。According to the fourth aspect of the present invention, an antenna for receiving a radio signal and outputting a received signal composed of a desired signal and a noise signal, and performing a correlation process for each symbol of the received signal to obtain a desired signal A first moving average processing unit that performs a moving average process on the desired signals for a plurality of symbols detected by the correlation processing unit to obtain a first moving average value of the desired signal; A logic circuit for performing a logical product of the first moving average value of the desired signal and the value of the received signal to obtain a second moving average value of the desired signal; a noise detection processing unit for detecting a noise signal from the received signal; An absolute value acquisition processing unit that calculates the absolute value of the noise signal detected by the noise detection processing unit; and a moving average of the noise signal by performing a moving average process on the absolute value of the noise signal calculated by the absolute value acquisition processing unit A second moving average processing unit for obtaining a value; And a calculation processing unit for estimating the level of the received signal from the ratio of the second moving average of the desired signal to the moving average of the noise signal. 2 can be accurately estimated from the numerical value for evaluating the radio channel quality, that is, the ratio of the moving average value of the noise signal to the moving average value of the noise signal. An advantageous effect that accurate radio channel quality estimation can be performed is obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の実施の形態１による無線回線品質推定
装置を示すブロック図FIG. 1 is a block diagram showing a radio channel quality estimation device according to a first embodiment of the present invention.

【図２】図１および図７の無線回線品質推定装置を構成
する移動平均処理部を示す構成図FIG. 2 is a configuration diagram showing a moving average processing unit included in the radio channel quality estimation device of FIGS. 1 and 7;

【図３】本発明の実施の形態２による無線回線品質推定
装置を示すブロック図FIG. 3 is a block diagram showing a radio channel quality estimation device according to a second embodiment of the present invention.

【図４】図３の無線回線品質推定装置を構成する巡回積
分処理部を示す構成図FIG. 4 is a configuration diagram showing a cyclic integration processing unit included in the wireless channel quality estimation device of FIG. 3;

【図５】本発明の実施の形態３による無線回線品質推定
装置を示すブロック図FIG. 5 is a block diagram showing a radio channel quality estimation device according to a third embodiment of the present invention.

【図６】図５の無線回線品質推定装置を構成する加重平
均処理部を示すブロック図FIG. 6 is a block diagram illustrating a weighted average processing unit included in the wireless channel quality estimating apparatus of FIG. 5;

【図７】本発明の実施の形態４による無線回線品質推定
装置を示すブロック図FIG. 7 is a block diagram showing a radio channel quality estimation device according to a fourth embodiment of the present invention.

【図８】従来の無線回線品質推定装置を示すブロック図FIG. 8 is a block diagram showing a conventional radio channel quality estimation device.

【符号の説明】[Explanation of symbols]

１ 相関処理部 ２、５ 移動平均処理部 ３ 雑音検出処理部 ４ 絶対値取得処理部 ６ Ｅｂ／Ｎ０計算処理部 ７、１１ シフトレジスタ ８ パラレル加算器 ９、１０ 巡回積分処理部 １２、１３ 加重平均処理部 １４ 遅延器 １５ 乗算器 １６ 加算器 １７ 論理回路 DESCRIPTION OF SYMBOLS 1 Correlation processing part 2, 5 Moving average processing part 3 Noise detection processing part 4 Absolute value acquisition processing part 6 Eb / N0 calculation processing part 7, 11 Shift register 8 Parallel adder 9, 10 Cyclic integration processing part 12, 13 Weighted average Processing unit 14 Delay unit 15 Multiplier 16 Adder 17 Logic circuit

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】電波信号を受信して希望信号と雑音信号と
から成る受信信号を出力するアンテナと、前記受信信号
の１シンボル毎に相関処理を行って前記希望信号を検出
する相関処理部と、前記相関処理部で検出された複数シ
ンボル分の前記希望信号に対して移動平均処理を行って
前記希望信号の移動平均値を求める第１の移動平均処理
部と、前記受信信号から雑音信号を検出する雑音検出処
理部と、前記雑音検出処理部で検出した雑音信号の絶対
値を計算する絶対値取得処理部と、前記絶対値取得処理
部で計算された前記雑音信号の絶対値に対して移動平均
処理を行って前記雑音信号の移動平均値を求める第２の
移動平均処理部と、前記希望信号の移動平均値と前記雑
音信号の移動平均値との比から前記受信信号のレベルを
推定する計算処理部とを有することを特徴とする無線回
線品質推定装置。An antenna for receiving a radio signal and outputting a reception signal composed of a desired signal and a noise signal; and a correlation processing unit for performing a correlation process for each symbol of the received signal to detect the desired signal. A first moving average processing unit for performing a moving average process on the desired signals for a plurality of symbols detected by the correlation processing unit to obtain a moving average value of the desired signal; A noise detection processing unit for detecting, an absolute value acquisition processing unit for calculating an absolute value of the noise signal detected by the noise detection processing unit, and an absolute value of the noise signal calculated by the absolute value acquisition processing unit. A second moving average processing unit for performing a moving average process to obtain a moving average value of the noise signal; and estimating a level of the received signal from a ratio of a moving average value of the desired signal to a moving average value of the noise signal. Calculation processing Radio channel quality estimation apparatus characterized by having and. 【請求項２】電波信号を受信して希望信号と雑音信号と
から成る受信信号を出力するアンテナと、前記受信信号
の１シンボル毎に相関処理を行って前記希望信号を検出
する相関処理部と、前記相関処理部で検出された１シン
ボル分の前記希望信号について巡回積分を行って前記希
望信号の巡回積分値を求める第１の巡回積分処理部と、
前記受信信号から雑音信号を検出する雑音検出処理部
と、前記雑音検出処理部で検出した雑音信号の絶対値を
計算する絶対値取得処理部と、前記絶対値取得処理部で
計算された前記雑音信号の絶対値について１シンボル分
の巡回積分を行って前記雑音信号の巡回積分値を求める
第２の巡回積分処理部と、前記希望信号の巡回積分値と
前記雑音信号の巡回積分値との比から前記受信信号のレ
ベルを推定する計算処理部とを有することを特徴とする
無線回線品質推定装置。2. An antenna for receiving a radio signal and outputting a reception signal composed of a desired signal and a noise signal, and a correlation processing unit for performing a correlation process for each symbol of the received signal to detect the desired signal. A first cyclic integration processing unit for performing a cyclic integration on the desired signal for one symbol detected by the correlation processing unit to obtain a cyclic integration value of the desired signal;
A noise detection processing unit that detects a noise signal from the received signal, an absolute value acquisition processing unit that calculates an absolute value of the noise signal detected by the noise detection processing unit, and the noise calculated by the absolute value acquisition processing unit A second cyclic integration processing unit for performing cyclic integration for one symbol on the absolute value of the signal to obtain a cyclic integration value of the noise signal; and a ratio between the cyclic integration value of the desired signal and the cyclic integration value of the noise signal. And a calculation processing unit for estimating the level of the received signal from the radio channel quality estimation apparatus. 【請求項３】電波信号を受信して希望信号と雑音信号と
から成る受信信号を出力するアンテナと、前記受信信号
の１シンボル毎に相関処理を行って前記希望信号を検出
する相関処理部と、１シンボル前の希望信号の値に加重
値を乗算して得られた加重乗算値を現希望信号に加算す
ることにより前記希望信号の加重平均値を求める第１の
加重平均処理部と、前記受信信号から雑音信号を検出す
る雑音検出処理部と、前記雑音検出処理部で検出した雑
音信号の絶対値を計算する絶対値取得処理部と、１シン
ボル前の雑音信号の絶対値に加重値を乗算して得られた
加重乗算値を現雑音信号に加算することにより前記雑音
信号の加重平均値を求める第２の加重平均処理部と、前
記希望信号の加重平均値と前記雑音信号の加重平均値と
の比から前記受信信号のレベルを推定する計算処理部と
を有することを特徴とする無線回線品質推定装置。3. An antenna for receiving a radio signal and outputting a received signal composed of a desired signal and a noise signal, and a correlation processing unit for performing a correlation process for each symbol of the received signal and detecting the desired signal. A first weighted average processing unit for obtaining a weighted average value of the desired signal by adding a weighted multiplication value obtained by multiplying a value of the desired signal one symbol before by a weight value to the current desired signal; A noise detection processing unit for detecting a noise signal from a received signal; an absolute value acquisition processing unit for calculating an absolute value of the noise signal detected by the noise detection processing unit; and a weighting value for the absolute value of the noise signal one symbol before. A second weighted average processing unit for obtaining a weighted average value of the noise signal by adding a weighted multiplied value obtained by the multiplication to the current noise signal; and a weighted average value of the desired signal and a weighted average of the noise signal. From the ratio with the value Radio channel quality estimation apparatus; and a calculation processing unit for estimating the level of the degree. 【請求項４】電波信号を受信して希望信号と雑音信号と
から成る受信信号を出力するアンテナと、前記受信信号
の１シンボル毎に相関処理を行って前記希望信号を検出
する相関処理部と、前記相関処理部で検出された複数シ
ンボル分の前記希望信号に対して移動平均処理を行って
前記希望信号の第１の移動平均値を求める第１の移動平
均処理部と、前記希望信号の第１の移動平均値と前記受
信信号の値との論理積を行って前記希望信号の第２の移
動平均値を求める論理回路と、前記受信信号から雑音信
号を検出する雑音検出処理部と、前記雑音検出処理部で
検出した雑音信号の絶対値を計算する絶対値取得処理部
と、前記絶対値取得処理部で計算された前記雑音信号の
絶対値に対して移動平均処理を行って前記雑音信号の移
動平均値を求める第２の移動平均処理部と、前記希望信
号の第２の移動平均値と前記雑音信号の移動平均値との
比から前記受信信号のレベルを推定する計算処理部とを
有することを特徴とする無線回線品質推定装置。4. An antenna for receiving a radio signal and outputting a received signal composed of a desired signal and a noise signal, and a correlation processing unit for performing a correlation process for each symbol of the received signal to detect the desired signal. A first moving average processing section for performing a moving average process on the desired signals for a plurality of symbols detected by the correlation processing section to obtain a first moving average value of the desired signal; A logic circuit for performing a logical product of a first moving average value and the value of the received signal to obtain a second moving average value of the desired signal; a noise detection processing unit for detecting a noise signal from the received signal; An absolute value acquisition processing unit that calculates an absolute value of the noise signal detected by the noise detection processing unit, and performs a moving average process on the absolute value of the noise signal calculated by the absolute value acquisition processing unit to perform the noise calculation. Find the moving average of a signal 2 a moving average processing unit, and a calculation processing unit for estimating the level of the received signal from a ratio between a second moving average value of the desired signal and a moving average value of the noise signal. Line quality estimation device.