JP3404526B2 - Direction finding receiver - Google Patents
Direction finding receiverInfo
- Publication number
- JP3404526B2 JP3404526B2 JP2000136710A JP2000136710A JP3404526B2 JP 3404526 B2 JP3404526 B2 JP 3404526B2 JP 2000136710 A JP2000136710 A JP 2000136710A JP 2000136710 A JP2000136710 A JP 2000136710A JP 3404526 B2 JP3404526 B2 JP 3404526B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- phase
- difference
- amplitude
- intermediate frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Radar Systems Or Details Thereof (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、モノパルス方式を
用いて到来電波の方向を探知する方向探知受信装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direction finding receiver for detecting the direction of an incoming radio wave by using a monopulse system.
【０００２】[0002]
【従来の技術】図１１は従来の一般的なモノパルス方式
の方向探知受信装置を示すブロック図であり、１は到来
電波を受信するアンテナ、受信信号を比較して和信号
(Σ信号)、差信号(Δ信号)を得る前置比較器及び和信
号、差信号を中間周波数信号(ＩＦ信号)に変換する周波
数変換器を含む信号受信・前処理部(これらを一括して
１とする)、２は中間周波数に変換された和信号
ΣＩＦ、差信号ΔＩＦの位相を検波する位相検波手段と
しての位相検波器、７はこの位相検波に用いる基準信号
発生器、３は２系統に分配した基準信号の片方を位相π
／２遅らせる遅延手段としての遅延回路、４は位相検波
された信号の振幅をサンプリングする振幅検波手段とし
ての振幅検波器、５は振幅サンプリングされた信号を用
いて到来電波の方向を算出する信号処理手段としての信
号処理器である。2. Description of the Related Art FIG. 11 is a block diagram showing a conventional general monopulse type direction finding receiving apparatus, wherein 1 is an antenna for receiving an incoming radio wave, and a sum signal by comparing received signals
(Σ signal), a pre-comparator for obtaining a difference signal (Δ signal) and a sum signal, a signal receiving / pre-processing unit including a frequency converter for converting the difference signal into an intermediate frequency signal (IF signal) (collectively these 2) is a sum signal Σ IF converted to an intermediate frequency, a phase detector as a phase detector for detecting the phase of the difference signal Δ IF , 7 is a reference signal generator used for this phase detection, 3 Is the phase π of one of the reference signals distributed to the two systems.
/ 2 is a delay circuit as a delay means for delaying, 4 is an amplitude detector as an amplitude detecting means for sampling the amplitude of a phase-detected signal, and 5 is a signal processing for calculating the direction of an incoming radio wave using the amplitude-sampled signal. It is a signal processor as a means.
【０００３】次に動作について説明する。従来のモノパ
ルス方式の方向探知受信装置は上記のように構成され、
信号受信・前処理部１から出力された中間周波数の和信
号及び差信号は基準信号発生器７及び遅延回路３によっ
て出力されたπ／２の位相差をもつ基準信号を用いて位
相検波器２で位相検波されＩ(Ｉｎ−Ｐｈａｓｅ)信号と
Ｑ(Ｑｕａｄｒａｔｕｒｅ)信号となる。つまり、和信号
についてΣＩ，ΣＱが、差信号についてΔＩ，ΔＱが位
相検波器２の出力として得られる。そして、例えば電子
情報通信学会「改訂レーダ技術」、ｐ１８６等に記載さ
れているような既知の方法により、これらのＩ信号及び
Ｑ信号の振幅を振幅検波器４で検波し信号処理器５で到
来電波の方向を算出する。Next, the operation will be described. The conventional monopulse type direction finding receiver is configured as described above,
The sum signal and the difference signal of the intermediate frequencies output from the signal receiving / preprocessing unit 1 use the reference signal having the phase difference of π / 2 output by the reference signal generator 7 and the delay circuit 3 to detect the phase detector 2 Then, the phase detection is performed to form an I (In-Phase) signal and a Q (Quadrature) signal. That is, Σ I and Σ Q are obtained as the sum signal, and Δ I and Δ Q are obtained as the output of the phase detector 2 for the difference signal. Then, the amplitudes of these I and Q signals are detected by the amplitude detector 4 and arrive at the signal processor 5 by a known method as described in, for example, "Revised Radar Technology" of the Institute of Electronics, Information and Communication Engineers, p186. Calculate the direction of radio waves.
【０００４】[0004]
【発明が解決しようとする課題】従来のモノパルス方式
の方向探知受信装置は、以上のように構成されているの
で、周波数特性が広帯域にわたる到来電波を受信すると
周波数変換器から出力される和信号及び差信号の周波数
と基準信号発生器から出力される基準信号の周波数との
間にずれが生じることにより位相検波器から出力された
Ｉ信号及びＱ信号の振幅が変動し、振幅検波器において
安定した振幅検波ができないという問題点があった。Since the conventional monopulse type direction finding receiver is constructed as described above, the sum signal output from the frequency converter and the sum signal output from the frequency converter when an incoming radio wave having a wide frequency characteristic is received. Due to the deviation between the frequency of the difference signal and the frequency of the reference signal output from the reference signal generator, the amplitudes of the I signal and the Q signal output from the phase detector fluctuate and stabilize in the amplitude detector. There is a problem that amplitude detection cannot be performed.
【０００５】本発明は、上記のような問題点を解消する
ためになされたもので、広帯域の到来電波を受信したと
きも安定した振幅検波を安価にかつ容易に実現する方向
探知受信装置を提供することを目的とする。The present invention has been made in order to solve the above problems, and provides a direction finding receiving device which realizes stable amplitude detection inexpensively and easily even when an incoming radio wave in a wide band is received. The purpose is to do.
【０００６】本発明のその他の目的や新規な特徴は後述
の実施の形態において明らかにする。Other objects and novel features of the present invention will be clarified in the embodiments described later.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本願請求項１の発明に係る方向探知受信装置は、到
来電波を受信するアンテナ、この受信した信号を比較し
て和信号及び差信号を得る前置比較器、及び前記和信号
及び差信号を中間周波数信号に変換する周波数変換器を
含む信号受信・前処理部と、中間周波数に変換された前
記和信号及び差信号の位相を検波する位相検波手段と、
前記位相検波手段による位相検波に必要な基準信号を前
記中間周波数の和信号又は差信号から得て、これを分配
した２系統の基準信号の片方を位相π／２遅らせる遅延
手段と、前記位相検波手段で位相検波された信号の振幅
をサンプリングする振幅検波手段と、前記振幅検波手段
で振幅サンプリングされた信号を用いて到来電波の方向
を算出する信号処理手段とを備えたことを特徴としてい
る。In order to achieve the above object, a direction finding receiving device according to the invention of claim 1 of the present invention comprises an antenna for receiving an incoming radio wave, a sum signal and a difference obtained by comparing the received signals. A pre-comparator for obtaining a signal, and a signal receiving / preprocessing unit including a frequency converter for converting the sum signal and the difference signal into an intermediate frequency signal, and a phase of the sum signal and the difference signal converted into the intermediate frequency. Phase detection means for detecting,
Delaying means for obtaining a reference signal required for phase detection by the phase detecting means from a sum signal or a difference signal of the intermediate frequency and delaying one of the divided two reference signals by a phase π / 2; An amplitude detecting means for sampling the amplitude of the signal phase-detected by the means and a signal processing means for calculating the direction of the incoming radio wave using the signal amplitude-sampled by the amplitude detecting means are provided.
【０００８】また、本願請求項２の発明に係る方向探知
受信装置は、２次元の方向探知を行うために到来電波を
受信するアンテナ、この受信した信号を比較して１つの
和信号及び水平差信号と高低差信号からなる２つの差信
号を得る前置比較器、及び前記１つの和信号及び２つの
差信号を中間周波数信号に変換する周波数変換器を含む
信号受信・前処理部と、中間周波数に変換された前記１
つの和信号及び２つの差信号の位相を検波する位相検波
手段と、前記位相検波手段による位相検波に必要な基準
信号を前記中間周波数の和信号、水平差信号及び高低差
信号のいずれかから得て、これを分配した２系統の基準
信号の片方を位相π／２遅らせる遅延手段と、前記位相
検波手段で位相検波された信号の振幅をサンプリングす
る振幅検波手段と、前記振幅検波手段で振幅サンプリン
グされた信号を用いて到来電波の方向を算出する信号処
理手段とを備えたことを特徴としている。The direction finding receiver according to the second aspect of the present invention includes an antenna for receiving an incoming radio wave for two-dimensional direction finding, comparing the received signals with one sum signal and a horizontal difference. Signal receiving / preprocessing unit including a pre-comparator for obtaining two difference signals composed of a signal and a height difference signal, and a frequency converter for converting the one sum signal and the two difference signals into an intermediate frequency signal; The 1 converted to frequency
Phase detection means for detecting the phase of one sum signal and two difference signals, and a reference signal necessary for phase detection by the phase detection means is obtained from any of the sum signal of the intermediate frequency, the horizontal difference signal and the height difference signal. Then, delay means for delaying one of the divided two reference signals of phase π / 2, amplitude detection means for sampling the amplitude of the signal phase-detected by the phase detection means, and amplitude sampling by the amplitude detection means. Signal processing means for calculating the direction of the incoming radio wave using the received signal.
【０００９】本願請求項３の発明に係る方向探知受信装
置は、請求項１又は２において、前記中間周波数に変換
された和信号及び差信号の振幅を検波する第２の振幅検
波手段をさらに備え、中間周波数に変換された和信号及
び差信号の位相検波とは別の系統により振幅検波を行
い、前記信号処理手段へ出力することを特徴としてい
る。The direction finding receiver according to the invention of claim 3 of the present application further comprises a second amplitude detecting means for detecting the amplitudes of the sum signal and the difference signal converted to the intermediate frequency according to claim 1 or 2. The amplitude detection is performed by a system different from the phase detection of the sum signal and the difference signal converted to the intermediate frequency, and the amplitude detection is output to the signal processing means.
【００１０】[0010]
【発明の実施の形態】以下、本発明による方向探知受信
装置を各実施の形態に従って説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a direction finding receiving device according to the present invention will be described according to each embodiment.
【００１１】実施の形態１．図１は本発明の実施の形態
１による方向探知受信装置の構成を示すブロック図であ
る。図１において、１は到来電波を受信するアンテナ、
受信信号を比較して和信号(Σ信号)、差信号(Δ信号)を
得る前置比較器及び和信号、差信号を中間周波数信号
(ＩＦ信号)に変換する周波数変換器を含む信号受信・前
処理部１(これらを一括して１とする）、２は中間周波
数に変換された和信号（ΣＩＦ信号）、差信号（ΔＩＦ
信号）の位相を検波する位相検波手段としての位相検波
器、３ａは中間周波数の和信号（ΣＩＦ信号）から得た
基準信号の２系統に分配した片方を位相π／２遅らせる
遅延手段としての遅延回路、４は位相検波された信号の
振幅をサンプリングする振幅検波手段としての振幅検波
器、５は振幅サンプリングされた信号を用いて到来電波
の方向を算出する信号処理手段としての信号処理器であ
る。Embodiment 1. 1 is a block diagram showing the configuration of a direction finding receiving device according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an antenna that receives incoming radio waves,
A pre-comparator that obtains a sum signal (Σ signal) and a difference signal (Δ signal) by comparing received signals, and a sum signal and a difference signal are intermediate frequency signals
A signal receiving / preprocessing unit 1 including a frequency converter for converting into an (IF signal) (these are collectively referred to as 1), 2 is a sum signal (Σ IF signal) converted into an intermediate frequency, and a difference signal (Δ IF
Phase detector as a phase detection means for detecting the phase of the signal), 3a is of one which was partitioned into two systems of the reference signal obtained from the intermediate frequency sum signal (sigma IF signal) as the phase [pi / 2 delaying delay means The delay circuit 4 is an amplitude detector as an amplitude detecting means for sampling the amplitude of the phase-detected signal, and 5 is a signal processor as a signal processing means for calculating the direction of the incoming radio wave using the amplitude-sampled signal. is there.
【００１２】次に動作について説明する。信号受信・前
処理部１から出力された中間周波数の和信号及び差信号
は、遅延回路３によってπ／２の位相差をつけられた基
準信号を用いて位相検波器２で位相検波されＩ(Ｉｎ−
Ｐｈａｓｅ：ΣＩ、ΔＩ）信号とＱ（Ｑｕａｄｒａｔｕ
ｒｅ：ΣＱ、ΔＱ）信号となる。つまり、和信号につい
てΣＩ，ΣＱが、差信号についてΔＩ，ΔＱが位相検波
器２の出力として得られる。これらのＩ信号及びＱ信号
の振幅を振幅検波器４で検波し、信号処理器５で到来電
波の方向を算出する。Next, the operation will be described. The sum signal and the difference signal of the intermediate frequencies output from the signal receiving / preprocessing unit 1 are phase-detected by the phase detector 2 using the reference signal having a phase difference of π / 2 by the delay circuit 3 and I ( In-
Phase: Σ I , Δ I ) signal and Q (Quadratu)
re: Σ Q , Δ Q ) signal. That is, Σ I and Σ Q are obtained as the sum signal, and Δ I and Δ Q are obtained as the output of the phase detector 2 for the difference signal. The amplitudes of these I and Q signals are detected by the amplitude detector 4, and the signal processor 5 calculates the direction of the incoming radio wave.
【００１３】ここで、中間周波数の和信号及び差信号の
位相を検波するときに必要な基準信号を得る方法として
中間周波数の和信号ΣＩＦを分配して用いることによ
り、中間周波数の和信号及び差信号の周波数と基準信号
の周波数との間にほとんどずれは生じず、位相検波器２
から出力されたＩ信号及びＱ信号の振幅がほとんど変動
しないため、振幅検波器４において安定した振幅検波が
できる。As a method of obtaining a reference signal necessary for detecting the phases of the intermediate frequency sum signal and the difference signal, the intermediate frequency sum signal Σ IF is distributed and used to obtain the intermediate frequency sum signal and There is almost no difference between the frequency of the difference signal and the frequency of the reference signal, and the phase detector 2
Since the amplitudes of the I signal and the Q signal output from the signal hardly change, the amplitude detector 4 can perform stable amplitude detection.
【００１４】中間周波数の和信号及び差信号の周波数と
基準信号の周波数との間にほとんどずれがない場合に、
位相検波器２から出力されたＩ信号及びＱ信号の振幅が
殆ど変動しないことを以下に説明する。When there is almost no difference between the frequencies of the sum signal and the difference signal of the intermediate frequency and the frequency of the reference signal,
The fact that the amplitudes of the I signal and the Q signal output from the phase detector 2 hardly change will be described below.
【００１５】中間周波数の和信号又は差信号を複素数で
表すと、
ＳＩＦ(ｆ，Ａ，φ，ｔ)＝Ａexp(２πｆｔ＋φ) …(１)
ＳＩＦ：中間周波数の和信号又は差信号
ｆ：周波数
Ａ：振幅
φ：位相
ｔ：時間
となる。また、この信号と周波数のずれがΔｆである基
準信号を複素数で表すと、
ＳＩＦ’(ｆ＋Δｆ，Ａ’，φ’，ｔ)＝Ａ’exp(−２π(ｆ＋Δｆ)ｔ＋φ’)
…(２)
ＳＩＦ’：基準信号
ｆ：周波数
Δｆ：周波数のずれ
Ａ’：振幅
φ’：位相
ｔ：時間
となる。上記の両信号が位相検波器２(例えばミクサ)に
入力されたとき、出力信号は次のように表される。
ＳＩＱ(Δｆ，Ａ，Ａ’，φ，φ’，ｔ)
＝ＳＩＦ(ｆ，Ａ，φ，ｔ)・ＳＩＦ’(ｆ＋Δｆ，Ａ’，φ’，ｔ)
＝ＡＡ’exp(−２πΔｆｔ＋φ＋φ’) (３)
ＳＩＱ：位相検波器からの出力信号When the sum signal or the difference signal of the intermediate frequency is expressed by a complex number, S IF (f, A, φ, t) = Aexp (2πft + φ) (1) S IF : The sum signal or the difference signal f of the intermediate frequency: Frequency A: amplitude φ: phase t: time. Further, when the reference signal whose frequency difference from this signal is Δf is expressed by a complex number, S IF '(f + Δf, A', φ ', t) = A'exp (-2π (f + Δf) t + φ') (2 ) S IF ': reference signal f: frequency Δf: frequency shift A': amplitude φ ': phase t: time. When the above two signals are input to the phase detector 2 (for example, a mixer), the output signal is expressed as follows. S IQ (Δf, A, A ′, φ, φ ′, t) = S IF (f, A, φ, t) · S IF ′ (f + Δf, A ′, φ ′, t) = AA′exp (− 2πΔft + φ + φ ′) (3) S IQ : Output signal from the phase detector
【００１６】従って周波数のずれΔｆが極めて小さい場
合、位相検波器から出力されるＩ信号及びＱ信号は時間
に依存する成分が除去され、振幅変動が極めて小さくな
る。Therefore, when the frequency deviation Δf is extremely small, the time-dependent components are removed from the I signal and the Q signal output from the phase detector, and the amplitude fluctuation becomes extremely small.
【００１７】実施の形態２．次に、実施の形態２につい
て説明する。実施の形態１では基準信号を得る方法とし
て中間周波数の和信号を用いたが、差信号を用いること
により実施の形態１と同様に安定した振幅検波ができ
る。Embodiment 2. Next, the second embodiment will be described. In the first embodiment, the sum signal of the intermediate frequencies is used as the method for obtaining the reference signal, but by using the difference signal, stable amplitude detection can be performed as in the first embodiment.
【００１８】図２は本発明の実施の形態２による方向探
知受信装置の構成を示すブロック図である。図２におい
て、上記実施の形態１と同一もしくは相当部分は同一符
号で示す。３ｂは中間周波数の差信号(ΔＩＦ信号)から
得た基準信号の２系統に分配した片方を位相π／２遅ら
せる遅延回路である。FIG. 2 is a block diagram showing the structure of a direction finding receiver according to the second embodiment of the present invention. In FIG. 2, parts that are the same as or correspond to those in the first embodiment are denoted by the same reference numerals. 3b is a delay circuit for the one that was distributed into two systems of the reference signal obtained from the difference signal of an intermediate frequency (delta IF signal) phase [pi / 2 delay.
【００１９】動作は基本的に実施の形態１と同様であ
る。ここで、中間周波数の和信号及び差信号の位相を検
波するときに必要な基準信号を得る方法として中間周波
数の差信号を分配して用いることにより、実施の形態１
と同様の効果が期待できる。The operation is basically the same as that of the first embodiment. Here, by distributing and using the intermediate frequency difference signal as a method of obtaining a reference signal necessary when detecting the phases of the intermediate frequency sum signal and the difference signal, the first embodiment
The same effect as can be expected.
【００２０】実施の形態３．次に、実施の形態３につい
て説明する。この場合、１次元の方向探知を行う受信装
置である実施の形態１を２次元の方向探知を行う受信装
置に適用する。Embodiment 3. Next, a third embodiment will be described. In this case, the first embodiment, which is a receiving device that performs one-dimensional direction finding, is applied to a receiving device that performs two-dimensional direction finding.
【００２１】図３は本発明の実施の形態３による方向探
知受信装置の構成を示すブロック図である。図３におい
て、上記実施の形態１と同一もしくは相当部分は同一符
号で示す。１ａは到来電波を受信するアンテナ、受信信
号を比較して１つの和信号(Σ信号)、２つの差信号(Δ
信号)を得る前置比較器及び和信号、差信号を中間周波
数信号(ＩＦ信号)に変換する周波数変換器を含む信号受
信・前処理部(これらを一括して１ａとする)、３ａは中
間周波数の和信号(ΣＩＦ信号)から得た基準信号の２系
統に分配した片方を位相π／２遅らせる遅延回路であ
る。なお、前記２つの差信号は水平差信号(ΔＡＺ信号)
及び高低差信号(ΔＥＬ信号)である。FIG. 3 is a block diagram showing the structure of a direction finding receiver according to a third embodiment of the present invention. In FIG. 3, parts that are the same as or correspond to those in the first embodiment are denoted by the same reference numerals. 1a is an antenna for receiving the incoming radio wave, comparing the received signals with one sum signal (Σ signal) and two difference signals (Δ signal
Signal reception / pre-processing unit including a pre-comparator for obtaining a signal), a sum signal, and a frequency converter for converting a difference signal into an intermediate frequency signal (IF signal) (these are collectively referred to as 1a), 3a is an intermediate This is a delay circuit that delays one of the reference signals obtained from the sum signal of frequencies (Σ IF signal) into two systems by phase π / 2. The two difference signals are horizontal difference signals (ΔAZ signals).
And a height difference signal (ΔEL signal).
【００２２】次に動作について説明する。信号受信・前
処理部１ａから出力された中間周波数の和信号及び２つ
の差信号は、遅延回路３ａによってπ／２の位相差をつ
けられた基準信号を用いて位相検波器２で位相検波され
Ｉ（Ｉｎ−Ｐｈａｓｅ：ΣＩ、ΔＡＺＩ、ΔＥＬＩ）信
号とＱ（Ｑｕａｄｒａｔｕｒｅ：ΣＱ、ΔＡＺＱ、ΔＥ
ＬＱ）信号となる。動作は基本的に実施の形態１と同様
であり、２次元の方向探知を行う受信装置においても実
施の形態１と同様な効果が期待できる。Next, the operation will be described. The sum signal of the intermediate frequencies and the two difference signals output from the signal receiving / preprocessing unit 1a are phase-detected by the phase detector 2 using the reference signal with a phase difference of π / 2 by the delay circuit 3a. I (In-Phase: Σ I , ΔAZ I , ΔEL I ) signal and Q (Quadrature: Σ Q , ΔAZ Q , ΔE)
L Q ) signal. The operation is basically the same as that of the first embodiment, and the same effect as that of the first embodiment can be expected in the receiving device that performs two-dimensional direction detection.
【００２３】実施の形態４．次に、実施の形態４につい
て説明する。この場合、１次元の方向探知を行う受信装
置である実施の形態２を２次元の方向探知を行う受信装
置に適用する。Fourth Embodiment Next, a fourth embodiment will be described. In this case, the second embodiment, which is a receiving device that performs one-dimensional direction finding, is applied to a receiving device that performs two-dimensional direction finding.
【００２４】図４は本発明の実施の形態４による方向探
知受信装置の構成を示すブロック図である。図４におい
て、上記実施の形態３と同一もしくは相当部分は同一符
号で示す。３ｃは中間周波数の差信号のうち水平差信号
(ΔＡＺＩＦ信号)から得た基準信号の２系統に分配した
片方を位相π／２遅らせる遅延回路である。FIG. 4 is a block diagram showing the structure of a direction finding receiving device according to the fourth embodiment of the present invention. In FIG. 4, parts that are the same as or correspond to those in the third embodiment are denoted by the same reference numerals. 3c is a horizontal difference signal of the intermediate frequency difference signals
It is a delay circuit that delays one of the two divided reference signals obtained from the (ΔAZ IF signal) by phase π / 2.
【００２５】次に動作について説明する。信号受信・前
処理部１ａから出力された中間周波数の和信号及び２つ
の差信号は、遅延回路３ｃによってπ／２の位相差をつ
けられた基準信号を用いて位相検波器２で位相検波され
Ｉ（Ｉｎ−Ｐｈａｓｅ：ΣＩ、ΔＡＺＩ、ΔＥＬＩ）信
号とＱ（Ｑｕａｄｒａｔｕｒｅ：ΣＱ、ΔＡＺＱ、ΔＥ
ＬＱ）信号となる。動作は基本的に実施の形態２と同様
である。ここで、中間周波数の和信号及び差信号の位相
を検波するときに必要な基準信号を得る方法として中間
周波数の２つの差信号のうち水平差信号(ΔＡＺＩＦ信
号)を分配して用いることにより、２次元の方向探知を
行う受信装置においても実施の形態２と同様の効果が期
待できる。Next, the operation will be described. The sum signal of the intermediate frequencies and the two difference signals output from the signal receiving / preprocessing unit 1a are phase-detected by the phase detector 2 using the reference signal having a phase difference of π / 2 by the delay circuit 3c. I (In-Phase: Σ I , ΔAZ I , ΔEL I ) signal and Q (Quadrature: Σ Q , ΔAZ Q , ΔE)
L Q ) signal. The operation is basically the same as in the second embodiment. Here, a horizontal difference signal (ΔAZ IF signal) of the two difference signals of the intermediate frequency is distributed and used as a method of obtaining a reference signal required when detecting the phases of the sum signal and the difference signal of the intermediate frequency. The same effect as in the second embodiment can be expected in a receiving device that performs two-dimensional direction detection.
【００２６】実施の形態５．次に、実施の形態５につい
て説明する。１次元の方向探知を行う受信装置である実
施の形態２を２次元の方向探知を行う受信装置に適用す
る別の装置を示す。Embodiment 5. Next, a fifth embodiment will be described. Another device in which the second embodiment, which is a receiving device that performs one-dimensional direction detection, is applied to a receiving device that performs two-dimensional direction detection, is shown.
【００２７】図５は本発明の実施の形態５による方向探
知受信装置の構成を示すブロック図である。図５におい
て、上記実施の形態４と同一もしくは相当部分は同一符
号で示す。３ｄは中間周波数の差信号のうち高低差信号
(ΔＥＬＩＦ信号)から得た基準信号の２系統に分配した
片方を位相π／２遅らせる遅延回路である。FIG. 5 is a block diagram showing the structure of a direction finding receiver according to a fifth embodiment of the present invention. In FIG. 5, parts that are the same as or correspond to those in the fourth embodiment are denoted by the same reference numerals. 3d is a difference signal of the intermediate frequency difference signal
This is a delay circuit that delays one of the two divided reference signals obtained from the (ΔEL IF signal) by phase π / 2.
【００２８】次に動作について説明する。信号受信・前
処理部１ａから出力された中間周波数の和信号及び２つ
の差信号は、遅延回路３ｄによってπ／２の位相差をつ
けられた基準信号を用いて位相検波器２で位相検波され
Ｉ（Ｉｎ−Ｐｈａｓｅ：ΣＩ、ΔＡＺＩ、ΔＥＬＩ）信
号とＱ（Ｑｕａｄｒａｔｕｒｅ：ΣＱ、ΔＡＺＱ、ΔＥ
ＬＱ）信号となる。動作は基本的に実施の形態２と同様
である。ここで、中間周波数の和信号及び差信号の位相
を検波するときに必要な基準信号を得る方法として中間
周波数の２つの差信号のうち高低差信号(ΔＥＬＩＦ信
号)を分配して用いることにより、２次元の方向探知を
行う受信装置においても実施の形態２と同様の効果が期
待できる。Next, the operation will be described. The sum signal of the intermediate frequencies and the two difference signals output from the signal receiving / preprocessing unit 1a are phase-detected by the phase detector 2 using a reference signal having a phase difference of π / 2 by the delay circuit 3d. I (In-Phase: Σ I , ΔAZ I , ΔEL I ) signal and Q (Quadrature: Σ Q , ΔAZ Q , ΔE)
L Q ) signal. The operation is basically the same as in the second embodiment. Here, as a method of obtaining a reference signal necessary for detecting the phases of the sum signal and the difference signal of the intermediate frequency, by dividing and using the height difference signal (ΔEL IF signal) of the two difference signals of the intermediate frequency, The same effect as in the second embodiment can be expected in a receiving device that performs two-dimensional direction detection.
【００２９】実施の形態６．次に、実施の形態６につい
て説明する。実施の形態１の位相検波とは別系統で振幅
検波を行う(第２の振幅検波手段を設ける)ことにより、
振幅検波のダイナミックレンジを容易に確保することが
できる。Sixth Embodiment Next, a sixth embodiment will be described. By performing amplitude detection in a system different from the phase detection of the first embodiment (providing a second amplitude detection means),
The dynamic range of amplitude detection can be easily secured.
【００３０】図６は本発明の実施の形態６による方向探
知受信装置の構成を示すブロック図である。図６におい
て、上記実施の形態１と同一もしくは相当部分は同一符
号で示す。６は中間周波数に変換された和信号（ΣＩＦ
信号）及び差信号（ΔＩＦ信号）の振幅を検波する第２
の振幅検波手段としての振幅検波器である。FIG. 6 is a block diagram showing the structure of a direction finding receiver according to a sixth embodiment of the present invention. In FIG. 6, parts that are the same as or correspond to those in the first embodiment are denoted by the same reference numerals. 6 is a sum signal (Σ IF converted to an intermediate frequency
Signal) and difference signal (Δ IF signal) amplitude detection second
It is an amplitude detector as the amplitude detection means of.
【００３１】次に動作について説明する。動作は基本的
に実施の形態１と同様である。また実施の形態１に加え
て、中間周波数の和信号及び差信号を分配し、振幅検波
器６で和信号及び差信号の振幅を検波し信号処理器５へ
出力することにより、振幅検波のダイナミックレンジを
容易に確保することができる。Next, the operation will be described. The operation is basically the same as in the first embodiment. In addition to the first embodiment, the sum signal and the difference signal of the intermediate frequency are distributed, the amplitudes of the sum signal and the difference signal are detected by the amplitude detector 6, and the amplitudes are output to the signal processor 5. The range can be easily secured.
【００３２】なぜならば、位相検波器２から出力された
Ｉ信号及びＱ信号の振幅は入力した中間周波数信号の振
幅と基準信号の振幅の積に比例するため、和信号又は差
信号の振幅の２乗に比例するが、位相検波とは別の系統
で検波を行う場合、振幅は和信号又は差信号の振幅の１
乗に比例するため、ダイナミックレンジの確保は容易と
なる。Because the amplitudes of the I signal and the Q signal output from the phase detector 2 are proportional to the product of the amplitude of the input intermediate frequency signal and the amplitude of the reference signal, the amplitude of the sum signal or the difference signal is 2 Although it is proportional to the power, when the detection is performed by a system other than the phase detection, the amplitude is 1 of the amplitude of the sum signal or difference signal.
Since it is proportional to the power, it becomes easy to secure the dynamic range.
【００３３】同様にして、上記実施の形態２乃至５にお
いてそれぞれ、位相検波とは別系統で振幅検波を行うこ
とにより、振幅検波のダイナミックレンジを容易に確保
するようにした実施の形態７乃至１０を図７乃至１０に
示した。動作はそれぞれの実施の形態の動作２乃至５に
上記実施の形態６のものを加えたものであるので説明は
省略する。これらにおいても同等の効果が得られる。Similarly, in the second to fifth embodiments, the amplitude detection is performed in a system different from the phase detection to easily secure the dynamic range of the amplitude detection. Are shown in FIGS. The operation is the operation 2 to 5 of each embodiment to which the operation of the above-mentioned sixth embodiment is added, and the description thereof will be omitted. Even in these cases, the same effect can be obtained.
【００３４】以上本発明の実施の形態について説明して
きたが、本発明はこれに限定されることなく請求項の記
載の範囲内において各種の変形、変更が可能なことは当
業者には自明であろう。Although the embodiment of the present invention has been described above, it is obvious to those skilled in the art that the present invention is not limited to this and various modifications and changes can be made within the scope of the claims. Ah
【００３５】[0035]
【発明の効果】以上のように、広帯域の到来電波を受信
したとき、周波数変換器から出力される和信号及び差信
号の周波数と位相検波の基準信号の周波数とのずれによ
り安定した振幅検波ができないという問題に対し、本発
明によれば、中間周波数の和信号及び差信号の位相を検
波するときに必要な基準信号を得るのに、中間周波数の
和信号又は差信号を分配して用いているので、中間周波
数の和信号及び差信号の周波数と基準信号の周波数との
間にほとんどずれは生じず、位相検波手段から出力され
たＩ信号及びＱ信号の振幅がほとんど変動しないため、
振幅検波手段において安定した振幅検波ができるため、
広帯域の到来電波を受信したときも安定した振幅検波を
安価にかつ容易に実現できる効果がある。As described above, when an incoming radio wave in a wide band is received, stable amplitude detection can be performed due to the difference between the frequency of the sum signal and the difference signal output from the frequency converter and the frequency of the reference signal for phase detection. According to the present invention, in order to solve the problem, the sum signal or the difference signal of the intermediate frequency is distributed and used in order to obtain the reference signal necessary for detecting the phases of the sum signal and the difference signal of the intermediate frequency. Therefore, there is almost no difference between the frequencies of the sum signal and the difference signal of the intermediate frequency and the frequency of the reference signal, and the amplitudes of the I signal and the Q signal output from the phase detection means hardly change.
Since stable amplitude detection is possible with the amplitude detection means,
There is an effect that stable amplitude detection can be easily realized at low cost even when an incoming radio wave in a wide band is received.
【００３６】また同様に、２次元の方向探知に適用され
る同様の装置において、中間周波数の１つの和信号及び
２つの差信号の位相を検波するときに必要な基準信号を
得るのに、中間周波数の１つの和信号及び水平差信号と
高低差信号からなる２つの差信号のいずれかを分配して
用いる構成とすれば、中間周波数の１つの和信号及び２
つの差信号の周波数と基準信号の周波数との間にほとん
どずれは生じず、位相検波手段から出力されたＩ信号及
びＱ信号の振幅がほとんど変動しないため、振幅検波手
段において安定した振幅検波ができるため、広帯域の到
来電波を受信したときも安定した振幅検波を安価にかつ
容易に実現できる効果がある。Similarly, in a similar device applied to two-dimensional direction finding, an intermediate signal is obtained in order to obtain a reference signal necessary for detecting the phases of one sum signal and two difference signals at intermediate frequencies. If the configuration is such that one sum signal of the frequency and two difference signals consisting of the horizontal difference signal and the height difference signal are distributed and used, one sum signal of the intermediate frequency and two
There is almost no difference between the frequency of the two difference signals and the frequency of the reference signal, and the amplitudes of the I and Q signals output from the phase detecting means hardly change, so that stable amplitude detection can be performed in the amplitude detecting means. Therefore, there is an effect that stable amplitude detection can be easily realized at low cost even when an incoming radio wave in a wide band is received.
【００３７】さらに、１次元又は２次元の方向探知に適
用される装置において、中間周波数の和信号及び差信号
をそれぞれ分配し、位相検波とは別の系統により中間周
波数の和信号及び差信号の振幅検波を行い、信号処理手
段へ出力するようにすれば、信号処理手段における方位
算出に必要な和信号及び差信号の振幅を検波する際のダ
イナミックレンジを容易に確保できる効果がある。Further, in a device applied to one-dimensional or two-dimensional direction finding, the sum signal and the difference signal of the intermediate frequency are respectively distributed, and the sum signal and the difference signal of the intermediate frequency are divided by a system different from the phase detection. If the amplitude detection is performed and output to the signal processing means, there is an effect that the dynamic range can be easily secured when detecting the amplitudes of the sum signal and the difference signal necessary for the direction calculation in the signal processing means.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施の形態１による方向探知受信装置
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 direction finding receiving device according to a first embodiment of the present invention.
【図２】本発明の実施の形態２による方向探知受信装置
の構成を示すブロック図である。FIG. 2 is a block diagram showing a configuration of a direction finding receiving device according to a second embodiment of the present invention.
【図３】本発明の実施の形態３による方向探知受信装置
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 direction finding receiving device according to a third embodiment of the present invention.
【図４】本発明の実施の形態４による方向探知受信装置
の構成を示すブロック図である。FIG. 4 is a block diagram showing a configuration of a direction finding receiving device according to a fourth embodiment of the present invention.
【図５】本発明の実施の形態５による方向探知受信装置
の構成を示すブロック図である。FIG. 5 is a block diagram showing a configuration of a direction finding receiving device according to a fifth embodiment of the present invention.
【図６】本発明の実施の形態６による方向探知受信装置
の構成を示すブロック図である。FIG. 6 is a block diagram showing a configuration of a direction finding receiving device according to a sixth embodiment of the present invention.
【図７】本発明の実施の形態７による方向探知受信装置
の構成を示すブロック図である。FIG. 7 is a block diagram showing a configuration of a direction finding receiving device according to a seventh embodiment of the present invention.
【図８】本発明の実施の形態８による方向探知受信装置
の構成を示すブロック図である。FIG. 8 is a block diagram showing a configuration of a direction finding receiving device according to an eighth embodiment of the present invention.
【図９】本発明の実施の形態９による方向探知受信装置
の構成を示すブロック図である。FIG. 9 is a block diagram showing the configuration of a direction finding receiving device according to a ninth embodiment of the present invention.
【図１０】本発明の実施の形態１０による方向探知受信
装置の構成を示すブロック図である。FIG. 10 is a block diagram showing the structure of a direction finding receiving device according to a tenth embodiment of the present invention.
【図１１】従来の方向探知受信装置の構成を示すブロッ
ク図である。FIG. 11 is a block diagram showing a configuration of a conventional direction finding receiving device.
１，１ａ 信号受信・前処理部(信号受信・前処理手段) ２ 位相検波器(位相検波手段) ３ａ，３ｂ，３ｃ，３ｄ 遅延回路(遅延手段) ４ 振幅検波器(振幅検波手段) ５ 信号処理器(信号処理手段) ６ 振幅検波器(第２の振幅検波手段) 1,1a Signal receiving / preprocessing unit (signal receiving / preprocessing means) 2 Phase detector (Phase detector) 3a, 3b, 3c, 3d Delay circuit (delay means) 4 Amplitude detector (amplitude detection means) 5 Signal processor (Signal processing means) 6 Amplitude detector (second amplitude detector)
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平９−257901（ＪＰ，Ａ) 特開 平10−173428（ＪＰ，Ａ) 特開 平10−160813（ＪＰ，Ａ) 特開 平７−287060（ＪＰ，Ａ) 特開 平９−318722（ＪＰ，Ａ) 特開 昭60−49276（ＪＰ，Ａ) 特開2000−180533（ＪＰ，Ａ) 特開2000−284038（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01S 3/00 - 3/74 G01S 7/00 - 7/42 G01S 13/00 - 13/95 ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-9-257901 (JP, A) JP-A-10-173428 (JP, A) JP-A-10-160813 (JP, A) JP-A-7- 287060 (JP, A) JP 9-318722 (JP, A) JP 60-49276 (JP, A) JP 2000-180533 (JP, A) JP 2000-284038 (JP, A) (58 ) Fields surveyed (Int.Cl. 7 , DB name) G01S 3/00-3/74 G01S 7 /00-7/42 G01S 13/00-13/95
Claims (3)
した信号を比較して和信号及び差信号を得る前置比較
器、及び前記和信号及び差信号を中間周波数信号に変換
する周波数変換器を含む信号受信・前処理部と、 中間周波数に変換された前記和信号及び差信号の位相を
検波する位相検波手段と、 前記位相検波手段による位相検波に必要な基準信号を前
記中間周波数の和信号又は差信号から得て、これを分配
した２系統の基準信号の片方を位相π／２遅らせる遅延
手段と、 前記位相検波手段で位相検波された信号の振幅をサンプ
リングする振幅検波手段と、 前記振幅検波手段で振幅サンプリングされた信号を用い
て到来電波の方向を算出する信号処理手段とを備えたこ
とを特徴とする方向探知受信装置。1. An antenna for receiving an incoming radio wave, a pre-comparator for comparing the received signals to obtain a sum signal and a difference signal, and a frequency converter for converting the sum signal and the difference signal into an intermediate frequency signal. A signal receiving / preprocessing unit including: a phase detection means for detecting the phases of the sum signal and the difference signal converted to an intermediate frequency; and a reference signal necessary for phase detection by the phase detection means, the sum signal of the intermediate frequency Alternatively, a delay unit that obtains a difference signal and delays one of two divided reference signals by a phase π / 2; an amplitude detection unit that samples the amplitude of the signal phase-detected by the phase detection unit; A direction finding receiving device comprising: a signal processing unit that calculates the direction of an incoming radio wave using a signal amplitude-sampled by a detection unit.
を受信するアンテナ、この受信した信号を比較して１つ
の和信号及び水平差信号と高低差信号からなる２つの差
信号を得る前置比較器、及び前記１つの和信号及び２つ
の差信号を中間周波数信号に変換する周波数変換器を含
む信号受信・前処理部と、 中間周波数に変換された前記１つの和信号及び２つの差
信号の位相を検波する位相検波手段と、 前記位相検波手段による位相検波に必要な基準信号を前
記中間周波数の和信号、水平差信号及び高低差信号のい
ずれかから得て、これを分配した２系統の基準信号の片
方を位相π／２遅らせる遅延手段と、 前記位相検波手段で位相検波された信号の振幅をサンプ
リングする振幅検波手段と、 前記振幅検波手段で振幅サンプリングされた信号を用い
て到来電波の方向を算出する信号処理手段とを備えたこ
とを特徴とする方向探知受信装置。2. An antenna for receiving an incoming radio wave for two-dimensional direction finding, and comparing the received signals to obtain one sum signal and two difference signals consisting of a horizontal difference signal and a height difference signal. And a signal receiving / preprocessing unit including a frequency comparator for converting the one sum signal and the two difference signals into an intermediate frequency signal, and the one sum signal and two differences converted into the intermediate frequency Phase detection means for detecting the phase of the signal and a reference signal required for phase detection by the phase detection means are obtained from any of the intermediate frequency sum signal, the horizontal difference signal, and the height difference signal, and distributed. A delay means for delaying one side of the system reference signal by a phase π / 2, an amplitude detection means for sampling the amplitude of the signal phase-detected by the phase detection means, and a signal amplitude-sampled by the amplitude detection means. A direction finding receiving device comprising: a signal processing unit that calculates the direction of an incoming radio wave using the signal processing unit.
差信号の振幅を検波する第２の振幅検波手段をさらに備
え、中間周波数に変換された和信号及び差信号の位相検
波とは別の系統により振幅検波を行い、前記信号処理手
段へ出力することを特徴とする請求項１又は２記載の方
向探知受信装置。3. A second amplitude detection means for detecting the amplitudes of the sum signal and the difference signal converted to the intermediate frequency is further provided, which is different from the phase detection of the sum signal and the difference signal converted to the intermediate frequency. 3. The direction finding receiving device according to claim 1, wherein amplitude detection is performed by a system, and the detected signal is output to the signal processing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000136710A JP3404526B2 (en) | 2000-05-10 | 2000-05-10 | Direction finding receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000136710A JP3404526B2 (en) | 2000-05-10 | 2000-05-10 | Direction finding receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001318133A JP2001318133A (en) | 2001-11-16 |
| JP3404526B2 true JP3404526B2 (en) | 2003-05-12 |
Family
ID=18644611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000136710A Expired - Lifetime JP3404526B2 (en) | 2000-05-10 | 2000-05-10 | Direction finding receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3404526B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4630542B2 (en) * | 2003-12-22 | 2011-02-09 | キヤノン株式会社 | Wiring formation method |
-
2000
- 2000-05-10 JP JP2000136710A patent/JP3404526B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001318133A (en) | 2001-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10557933B2 (en) | Radar device and position-determination method | |
| US20080309546A1 (en) | Radar device | |
| US20040150548A1 (en) | Linear frequency modulation superimposed on double sideband diplex radar | |
| RU2255352C2 (en) | Method and system for radar measurement of object speeds and coordinates (modifications) | |
| WO2020196575A1 (en) | Radar device and method for determining range side lobe | |
| US20090021421A1 (en) | Radar device | |
| JP2001141811A (en) | Radar for measuring distance to target | |
| JP2000338230A (en) | Radar device | |
| JP6324327B2 (en) | Passive radar equipment | |
| US3339199A (en) | Single-channel signal-processing network and monopulse receiver systems embodying the same | |
| US20090219208A1 (en) | Digital beam forming using frequency-modulated signals | |
| JP3808431B2 (en) | Direction finding device | |
| JP6573748B2 (en) | Radar equipment | |
| JP3404526B2 (en) | Direction finding receiver | |
| US7095363B2 (en) | Pulse radar apparatus | |
| JP2009287942A (en) | Direction finder | |
| JP3269965B2 (en) | Orientation detection device | |
| JPS6119949B2 (en) | ||
| EP4158371A1 (en) | Radio direction-finding system and methods | |
| US11960023B2 (en) | Radar device | |
| JP2010223870A (en) | Target azimuth calculating device | |
| JPH06160522A (en) | Fish detector for measurement | |
| JP3226466B2 (en) | Radar apparatus and radar signal processing method thereof | |
| JP2001116834A (en) | Radar system | |
| Kurniawan et al. | Implementation of automatic I/Q imbalance correction for FMCW radar system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| R150 | Certificate of patent or registration of utility model |
Ref document number: 3404526 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |