JPS6124339A - Compensating system of cross polarized wave - Google Patents

Compensating system of cross polarized wave

Info

Publication number
JPS6124339A
JPS6124339A JP14471284A JP14471284A JPS6124339A JP S6124339 A JPS6124339 A JP S6124339A JP 14471284 A JP14471284 A JP 14471284A JP 14471284 A JP14471284 A JP 14471284A JP S6124339 A JPS6124339 A JP S6124339A
Authority
JP
Japan
Prior art keywords
signal
beat
polarization
receiver
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.)
Pending
Application number
JP14471284A
Other languages
Japanese (ja)
Inventor
Akira Hamada
濱田 彰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP14471284A priority Critical patent/JPS6124339A/en
Publication of JPS6124339A publication Critical patent/JPS6124339A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/002Reducing depolarization effects

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To compensate cross polarized wave interference at each communication signal wave with simple constitution by providing a reference hat generating means generating a beat frequency and control signal generating means generating a control signal of a compensation signal coupling means from an output of the beat detecting means so as to control the output of the beat detection means to be minimized. CONSTITUTION:A signal V(F1) transmitted from a transmitter 1 and a cross polarized wave interference component h(F2) transmitted from a transmitter 1' and generated in a propagation line are received to a receiver 2 for vertical polarized wave of a reception station, an amplitude modulation component in a frequency F due to beat between the V and h is generated in the reception output and its amplituide and phase are depending on the cross polarized wave interference component (h). Since the receivers 2, 2' are converted into an intermediate frequency by a common local oscillator 22, the intermediate frequency signal of the receiver 2' is branched and its amplitude and phase are controlled by a variable coupler 5, then a signal of the same amplitude but opposite phase with the cross polarized interference component (h) is obtained so as to compensate the cross polarized wave interference. This is applied similarly as to the horizontal polarized wave and the cross polarized wave interference is compensated at each communication signal wave.

Description

【発明の詳細な説明】 〔技術分野〕 本発明の交差偏波補償方式は、同一周波数の直交する二
つの偏波(垂直偏波と水平偏波または左旋円偏波と右旋
円偏波)を用いて別々の情報を伝送する直交偏波無線通
信方式において、降雨などによって伝搬路で発生する交
差偏波干渉を受信局で除去する交差偏波補償方式に関す
る。
[Detailed Description of the Invention] [Technical Field] The cross-polarization compensation method of the present invention uses two orthogonal polarizations of the same frequency (vertical polarization and horizontal polarization, or left-handed circular polarization and right-handed circular polarization). This invention relates to a cross-polarization compensation method in which cross-polarization interference generated in a propagation path due to rain or the like is removed at a receiving station in an orthogonal polarization wireless communication system that transmits separate pieces of information using a signal.

〔従来技術〕[Prior art]

近年、マイクロ波無線通4M方式では、同一周波数の互
いに1復交した二つの偏波を用いて別々の通信情報を伝
送し、同一周波数を二重に使用する直交偏波無線通信方
式が注目されている。直交する二つの偏波1ハ、伝搬路
中の雨滴などによる異方性のため交差偏波成分を発生し
、直交する二個波間で交差偏波干渉が発生することが知
られている。
In recent years, in the microwave wireless communication 4M system, an orthogonal polarization wireless communication system that transmits different communication information using two polarized waves of the same frequency that are mutually orthogonal, and that uses the same frequency twice has attracted attention. There is. It is known that cross-polarization components are generated due to anisotropy caused by two orthogonal polarized waves and raindrops in the propagation path, and cross-polarization interference occurs between the two orthogonal waves.

このような交差偏波干渉を除去するだめの方法として、
すでに種々の交差偏波補償方式が、例えば特公昭54−
34647号、特開昭55−133154号、特公昭5
8−40380号などに提案されている、しかしながら
、特公昭54−34647号公報記載の方法は、パイロ
ット信号波を使用して交差偏波干渉の検出を行うもので
、通信用信号波以外にパイロ・ット信号波を各偏波で送
信する必要があシ、各通信用信号波ごとに細かい補償を
行うには不適当で、特四昭55−133154号公報記
載の方法は復調したディジタル・ベースバンド信号と誤
差46号の相関を検出して交差偏波干渉の検出を行う方
法で、ディジタル変調方式の場合に限定されるという欠
点がある。又、特公昭58−40308号公報記載の方
法は、ファラデー回転により直交偏波信号に低周波の変
調を加え、この低周波成分を検出する摂動法によるもの
で、ファラデー変調器など特殊な導波管回路を必要とし
構成が複雑となる欠点がある。
As a way to eliminate such cross-polarization interference,
There are already various cross-polarization compensation methods, for example,
No. 34647, JP-A-55-133154, Special Publication No. 1973
However, the method described in Japanese Patent Publication No. 54-34647, which is proposed in Japanese Patent Publication No. 8-40380, detects cross-polarized interference using pilot signal waves.・It is necessary to transmit the digital signal wave with each polarization, and it is not suitable for performing detailed compensation for each communication signal wave. This method detects cross-polarization interference by detecting the correlation between the baseband signal and error No. 46, and has the disadvantage that it is limited to the case of digital modulation. Furthermore, the method described in Japanese Patent Publication No. 58-40308 uses a perturbation method in which low-frequency modulation is applied to orthogonally polarized signals by Faraday rotation, and this low-frequency component is detected. It has the disadvantage that it requires a tube circuit and the configuration is complicated.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、上述した従来方式の欠点を除去し、パ
イロット信号波を必要とせず、FM専のアナログ変調方
式に適用でき、構成が簡単で各通信用信号波ごとの補償
が容易な交差偏波補償方式を提供することである。
It is an object of the present invention to eliminate the drawbacks of the conventional method described above, to eliminate the need for pilot signal waves, to be applicable to FM-only analog modulation methods, to have a simple configuration, and to provide easy compensation for each communication signal wave. An object of the present invention is to provide a polarization compensation method.

〔発明の構成〕[Structure of the invention]

本発明の交差偏波補償方式は、送信局と受信局との開で
同一周波数の互いに直交する二つの偏波を用いて異なっ
た情報を伝送する直交偏波無線通信方式に用いられ伝送
中に発生した交差偏波干渉を受信局側で除去する交差偏
波補償方式において前記送信局が第1の偏波で第1の搬
送周波数の第1の信号を送信する送信機と、前記第1の
偏波と直交する第2の偏波で前記第1の搬送周波数と僅
かに異なる第2の搬送周波の第2の信号を送信する送信
機とを備え、前記受信局が前記第1の偏波で第1の信号
を受信する第1の受信機と、前記第2の偏波で第2の信
号を受信する第2の受信機と、前記第1の受信機の受信
信号から前記第1の信号と第2の信号のピート周数数成
分を検出するビート検出手段と、前記第2の受信機の受
信信号を分 ・岐して少なくともその大きさを制御信号
によ多制御し前記第1の受信機の受信信号に結合する補
償信号結合手段と、前記第1の受信機と前記第2の受信
機の受信信号から前記第1の信号と前記第2の信号との
ビート周波数を発生する基準ビート発生手段と、この基
準ビート発生手段および前記ビート検出手段の出力から
前記補償信号結合手段の制御信号を発生する制御信号発
生手段とを備え、前記ビート検出手段の出力が最小とな
るよう制御するようにして構成される。
The cross-polarization compensation method of the present invention is used in an orthogonal polarization wireless communication method that transmits different information using two mutually orthogonal polarized waves of the same frequency between a transmitting station and a receiving station. In a cross-polarization compensation method in which generated cross-polarization interference is removed on a receiving station side, the transmitter station transmits a first signal of a first carrier frequency with a first polarization; a transmitter that transmits a second signal of a second carrier frequency that is orthogonal to the polarization and that is slightly different from the first carrier frequency, and the receiving station a first receiver that receives a first signal at the second polarization; a second receiver that receives a second signal at the second polarization; a beat detecting means for detecting the repeating frequency component of the signal and the second signal; compensation signal coupling means for coupling to the received signal of the receiver; and generating beat frequencies of the first signal and the second signal from the received signals of the first receiver and the second receiver. comprising a reference beat generating means and a control signal generating means for generating a control signal for the compensation signal combining means from the outputs of the reference beat generating means and the beat detecting means, and controlling the output of the beat detecting means to a minimum. It is configured as follows.

〔実施例〕〔Example〕

次に図面を参照して本発明の詳細な説明する。 Next, the present invention will be described in detail with reference to the drawings.

第1図は本発明の第1の実施側のブロック図で、周波数
変調方式の無線通信回線において、受信局の中間周波数
帯で補償を行う場合を示している。
FIG. 1 is a block diagram of a first implementation side of the present invention, showing a case where compensation is performed in an intermediate frequency band of a receiving station in a frequency modulation wireless communication line.

第1図において、送信局は垂直側波(第1の個数)で第
1の搬送周波数F、の第1の1a号■を送信1゛る送信
機1と、水平偏波(第2の偏波)で)、とほぼ同じ周波
数でΔFだけ異なるん2の光1送周波数F!の28’、
 2の13号Hを送信する送信様1゛とを備え、受信局
は垂直および水平偏波でそれぞれ第1の信号■及び第2
の信号Hを受信する弔1及び第2の受信機−2及び2°
と、復脚器3,3゛で伽幅制限を受ける前の中間周波数
帯の受信信号を振幅検波し周波数ΔFの振幅変調成分を
検出する振幅検波器4,4′と、各受信a2.,2°の
中間周波数帯に挿入され、それぞれ干渉を与える側の偏
波の受信信号を分岐し、その振幅と位相を制御信号で制
御できる可変結合器5,5°を通して干渉を受ける側の
受信信号に加算回路21,21°て結合する補償信号結
合手段と、各受信ihz、 2゜のIF帯受信信号を混
合し90°位相の異なるΔFの基準ビート信号101,
102を発生する基準ビート信号発生器6と、振幅検波
器4及び4′の出力103,103’をそれぞれ基準ビ
ート信号101,102で同期検波して可変結合器5゜
5゛の制御信号を発生する制御器7,7°とから構成さ
れている。送信機1及び1°のFM変調器11及び11
°は、IP帯の搬送周波数fltf!が搬送周波数に対
して小さい周波数差ΔF(例えば数K Hz )を持つ
よう構成され、変調された信号は共通の局部発振器12
の出力によって周波数変換された後、増幅されて垂直お
よび水平の各偏波でそれぞれ送信される。受信局の垂直
偏波用受信機2には、送信機1から送信された信号V(
F、)と、送信機1゛から送信され伝搬路で発生した交
差偏波干渉成分h(t’t)とが受信され、受信出力釦
は■とhとのビートによる周波数ΔFの振幅変調成分が
発生し、その振幅および位相は交差偏波干渉成分りに依
存する。受信機2と2゛とは共通局部発振器22により
中間周波数に変換されているので、受信機2°の中間周
波信号を分岐し可変結合器5でその振幅および位相を制
御すれば、交差偏波干渉成分りと逆相同振幅の信号を得
ることができ交差偏波干渉を補償することができる。基
準ビート信号発生器6及び制御器7はこの2、だめの制
御信号を発生する回路で勘って、受信機2及び2°のI
F帯から分岐された受信信号104と104°はミクサ
61,62により混合され、互いに90°位相の異なる
二つの基準ビート信号101と102が得られ、制御器
7で制御信号を発生するよう構成されている。基準ビー
ト信号101と102との位相差はIP帯の90”位相
器63により発生されるので、ビート周波数ΔFが変動
しても常に90@の位相差を保つようになっている。こ
の基準ビート信号は水平偏波信号Hの位相に依存するか
ら、ビート周波数信号103をこの基準ビート信号で直
交検波することによ、9Hとhの位相および振幅関係を
検出してhと逆相同振幅の信号を発生させることができ
る。水平偏波についても同様で、受信機29の出力から
ビート周波数信号103°を振幅検波器4°で検出し可
変結合器5′、制御器7°により交差偏波千渉成分■を
補償するよう構成されている。。この方法によれは、パ
イロット信号波を使用せずに簡単な回路で通信用信号波
間のビート周波数を検出し、各通信用信号波(無線チャ
ンネル)ごとに交差偏波干渉を補償することができる。
In FIG. 1, the transmitting station has a transmitter 1 which transmits a first number 1a of a first carrier frequency F with vertical side waves (first number) and a horizontally polarized wave (second polarization). (wave) ), has almost the same frequency but differs by ΔF 2 optical 1 transmission frequency F! 28',
The receiving station transmits the first signal ■ and the second signal H with vertical and horizontal polarization, respectively.
1 and 2 receivers receiving signal H -2 and 2°
, amplitude detectors 4 and 4' for detecting the amplitude modulation component of frequency ΔF by amplitude-detecting the received signal in the intermediate frequency band before being subjected to the width restriction by the demodulators 3 and 3', and each reception a2. , 2° intermediate frequency band, and branches the receiving signal of the polarized wave on the side that causes interference, and receives the signal on the side receiving interference through a variable coupler 5, 5° whose amplitude and phase can be controlled by a control signal. Compensation signal combining means for combining the signal with an addition circuit 21, 21°, and a reference beat signal 101 of ΔF having a phase difference of 90° by mixing the received IHz and 2° IF band reception signals,
The outputs 103 and 103' of the reference beat signal generator 6 and the amplitude detectors 4 and 4', which generate the reference beat signal 102, are synchronously detected with the reference beat signals 101 and 102, respectively, to generate a control signal for the variable coupler 5゜5゛. It consists of a controller 7, 7°. FM modulators 11 and 11 for transmitters 1 and 1°
° is the IP band carrier frequency fltf! is configured to have a small frequency difference ΔF (for example, several KHz) with respect to the carrier frequency, and the modulated signal is transmitted by a common local oscillator 12.
After frequency conversion, the output is amplified and transmitted in vertical and horizontal polarization, respectively. The vertical polarization receiver 2 of the receiving station receives the signal V (
F,) and the cross-polarization interference component h(t't) transmitted from transmitter 1 and generated in the propagation path are received, and the reception output button is the amplitude modulation component of frequency ΔF due to the beat of ■ and h. occurs, and its amplitude and phase depend on the cross-polarization interference component. Since receivers 2 and 2' are converted to an intermediate frequency by a common local oscillator 22, if the intermediate frequency signal of receiver 2 is branched and its amplitude and phase are controlled by variable coupler 5, cross-polarized waves can be generated. It is possible to obtain a signal with the same amplitude and inverse phase as the interference component, and it is possible to compensate for cross-polarization interference. The reference beat signal generator 6 and the controller 7 are considered to be circuits that generate these two control signals, and the I of the receivers 2 and 2°.
The received signals 104 and 104° branched from the F band are mixed by mixers 61 and 62 to obtain two reference beat signals 101 and 102 having a phase difference of 90° from each other, and the controller 7 is configured to generate a control signal. has been done. Since the phase difference between the reference beat signals 101 and 102 is generated by the 90'' phase shifter 63 in the IP band, the phase difference of 90@ is always maintained even if the beat frequency ΔF fluctuates. Since the signal depends on the phase of the horizontally polarized signal H, by orthogonally detecting the beat frequency signal 103 using this reference beat signal, the phase and amplitude relationship between 9H and h is detected, and a signal with the same amplitude and inverse phase as h is obtained. The same goes for the horizontally polarized waves.The beat frequency signal 103° is detected from the output of the receiver 29 by the amplitude detector 4°, and the cross-polarized wave is detected by the variable coupler 5' and the controller 7°. This method uses a simple circuit to detect the beat frequency between communication signal waves without using pilot signal waves, and detects the beat frequency between communication signal waves (wireless channel ) can compensate for cross-polarization interference.

なお、振幅検波器4.4°はIP′jVI幅器23.2
3′の出力側に設けられているが、IP増幅器がAGC
増幅器の場合は振幅変調成分はAGC電圧から検出する
ことができる。
In addition, the amplitude detector 4.4° is the IP'jVI amplitude detector 23.2
The IP amplifier is installed on the output side of the AGC
In the case of an amplifier, the amplitude modulation component can be detected from the AGC voltage.

第2図は第1図の可変結合器5及び制御器7の−実施側
を示すブロック図で、可変結合器5は信号人力104°
を二分割するハイブリッド(HYB)51と、分割され
た信号の一方を90°位相シフトさせる位相器−52と
、分割された各成分の大きさと符七とを制御する振幅調
整器53.54と、直交二成分を合成するハイブリッド
()IYB)55とから構成されている。振幅調整器5
4,55は位相を変化させずに正および負(位相が18
0°反転した信号)の任意の振幅の信号を発生できる回
路で、例えばリング変調器によって構成することができ
る。制御器7は振幅検波器4の出力103をハイブリッ
ド(HYB)71で二分し、同期検波器72.73によ
り基準ビート信号102゜101で同期検波し、それぞ
れ104′と同相および直交の各成分の大きさと符号を
検出し、103が最小となるような制御が行われるよう
に構成されている。
FIG. 2 is a block diagram showing the implementation side of the variable coupler 5 and controller 7 in FIG.
a hybrid (HYB) 51 that divides the signal into two; a phase shifter 52 that shifts the phase of one of the divided signals by 90 degrees; and amplitude adjusters 53 and 54 that control the magnitude and sign of each divided component. , and a hybrid ()IYB) 55 that synthesizes orthogonal two components. Amplitude adjuster 5
4,55 is positive and negative without changing the phase (phase is 18
It is a circuit that can generate a signal of arbitrary amplitude (a signal inverted by 0°), and can be configured by, for example, a ring modulator. The controller 7 divides the output 103 of the amplitude detector 4 into two using a hybrid (HYB) 71, performs synchronous detection using the reference beat signal 102° and 101 using synchronous detectors 72 and 73, and detects each component in phase and quadrature with 104', respectively. The configuration is such that the magnitude and sign are detected and control is performed so that 103 becomes the minimum.

第3図は本発明の第2の実施例のブロック図で、受信局
側でビート周波数ΔFの位相変調成分を検出するよう構
成された実施例である。第3図において、各復調器3,
3°の復調出力のうちΔFのビート周波数成分は狭帯域
フィルタ8,8°で分離され、制御器7a、7a”に送
られる。基準ビート信号発生器6aは一つのミクサ64
及び周波数ΔFの90°位相器65とにより90°位相
の異なる二つの基準ビート信号を発生するように構成さ
れている。図中、第1図と同一構成の回路は同じ参照番
号で示してあシ、検出したビート周波数信号は第1図の
振幅変調成分を検出する場合とは90@の位相差がある
が、・桔1図と同様に交差偏波干渉を補償することがで
きる。第1図の方法は、ビートによる振幅変調成分を検
出しているためビート周波数が多少変動しても情報信号
との分離に支障がないが、この実施例のビート検出手段
は、ビート周波数成分を狭帯域フィルタにより情報信号
から分離しているためΔFを一定に保つ必要があシ、送
信&la’は周波数ΔFの低周波発振器13と位相検波
器14を用いてVC’015を制御しs’2=11+Δ
Fを得るよう構成されている。
FIG. 3 is a block diagram of a second embodiment of the present invention, which is an embodiment configured to detect the phase modulation component of the beat frequency ΔF on the receiving station side. In FIG. 3, each demodulator 3,
The beat frequency component of ΔF out of the demodulated output of 3° is separated by narrow band filters 8 and 8° and sent to controllers 7a and 7a''.The reference beat signal generator 6a consists of one mixer 64.
and a 90° phase shifter 65 with a frequency ΔF to generate two reference beat signals having a 90° phase difference. In the figure, circuits with the same configuration as in Figure 1 are indicated by the same reference numerals, and the detected beat frequency signal has a phase difference of 90@ compared to the case of detecting the amplitude modulation component in Figure 1. Similar to Figure 1, cross-polarization interference can be compensated for. The method shown in FIG. 1 detects the amplitude modulation component due to the beat, so even if the beat frequency changes slightly, there is no problem in separating it from the information signal. However, the beat detection means of this embodiment detects the beat frequency component. Since it is separated from the information signal by a narrow band filter, it is necessary to keep ΔF constant. For transmission &la', VC'015 is controlled using a low frequency oscillator 13 with frequency ΔF and a phase detector 14, and s'2 =11+Δ
It is configured to obtain F.

なお、ΔFは伝送する情報のベースバンド信号によって
占有されない周波数に選定することが望ましいが、ベー
スバンド信号の占有帯域内であってもビート周波数を検
出することは不可能でない。
Although it is desirable to select ΔF to be a frequency that is not occupied by the baseband signal of the information to be transmitted, it is not impossible to detect the beat frequency even within the occupied band of the baseband signal.

第4図は本発明の弔3の実施例の受信側の構成を示すブ
ロック図で、可変結合器5a、5a’が可変位相器56
,56°と可変減衰器57.57”とで構成された実施
例である。第4図において、受信(jd2a(2a’)
の振幅変調成分はIP増幅器24(24゛)のAGC用
振幅検波器4a(4a e )から検出され、検出され
たビート周波数信号103(103°)は同期検波器7
4 (74”)で基準ビート信号105(105°)に
よって同期検波され、その出力信号で可変減其器57(
57′)を制御する。基準ビート信号105(105°
)は%”(H)偏波から分岐した信号106(106°
)と、可変結合器5a(5a’)の中間タップから取シ
出されたH(V)偏波の信号107°(107)とを、
ミクサ66 (66’ )で混合して発生される。位相
検波器75(75°)は振幅検波器9(9°)の出力信
号を暴悪ビート信号105(105゛)で位相検波し、
その出力により可変位相器56(56°)を制御するよ
う構成されている。この構成によれば受信機2 alか
ら結合される補償信号の位相(可変結合器5aの中間タ
ップ信号107°と同相)は可変位相器56によって干
渉信号りの位相(振幅検波器9の出力の位相)と逆相と
なるよう制御され、次いで可変減衰器57により同振幅
となるよう制御され補償が行われる。
FIG. 4 is a block diagram showing the configuration of the receiving side of the third embodiment of the present invention, in which the variable couplers 5a and 5a' are variable phase shifters 56 and 56.
, 56° and a variable attenuator 57.57''. In FIG.
The amplitude modulation component of is detected by the AGC amplitude detector 4a (4a e ) of the IP amplifier 24 (24゛), and the detected beat frequency signal 103 (103°) is detected by the synchronous detector 7
4 (74") and is synchronously detected by the reference beat signal 105 (105°), and the output signal is used as the variable attenuator 57 (
57'). Reference beat signal 105 (105°
) is the signal 106 (106°
) and the H(V) polarized signal 107° (107) taken out from the intermediate tap of the variable coupler 5a (5a'),
Mixer 66 (66') generates the mixture. The phase detector 75 (75°) performs phase detection on the output signal of the amplitude detector 9 (9°) using the violent beat signal 105 (105°),
The output is configured to control a variable phase shifter 56 (56°). According to this configuration, the phase of the compensation signal coupled from the receiver 2 al (in phase with the intermediate tap signal 107° of the variable coupler 5a) is changed by the variable phase shifter 56 to the phase of the interference signal (the phase of the output of the amplitude detector 9). Then, the variable attenuator 57 controls the amplitude to have the same amplitude as that for compensation.

上述の第1.第2及び第3の各実施例は、いずれも受信
機のIP帯で干渉を補償するよう構成されているが、補
償信号結合手段はIP帯でなくRF帯に設けることも可
能である。又、いずれも垂直、水平の両偏波に交差偏波
干渉を除去するだめのビート横出千削、補償信号結合手
段および制御(1発生手段を474えているが、衛星通
信や多方向多重無線通信方式のような多元接続を行なう
1は交偏波無線通信方式の受信局では、一方の偏波の信
号のみしか使用しない場合も考えられ、このような受信
局では使用する偏波に対する交差偏波干渉のみを除去す
れはよく、一方の偏波にのみ検出および結合・制御手段
を設ければよい。又、第1図の実施例では送信機]及び
1′は共通の局部発振器12を用いているが、第1図お
よび第3図の実施例のように撮部変調成分を検出する場
合には周波数の安定な独立の局部発幾器を用いてもよい
1 above. The second and third embodiments are both configured to compensate for interference in the IP band of the receiver, but the compensation signal coupling means can also be provided in the RF band instead of the IP band. In addition, both of them have 474 beat horizontal cuts, compensation signal coupling means and control (1 generation means) for eliminating cross-polarization interference in both vertical and horizontal polarizations, but they are also used for satellite communication and multidirectional multiplex radio. A receiving station using a cross-polarized wireless communication system that performs multiple access, such as a communication system, may use only one polarized signal, and such a receiving station may It is sufficient to remove only wave interference, and it is sufficient to provide detection, coupling and control means for only one polarized wave.In addition, in the embodiment shown in FIG. However, when detecting the modulation component of the imaging section as in the embodiments of FIGS. 1 and 3, an independent local oscillator with stable frequency may be used.

降雨による交差偏波干渉の発生量社周波数によって異j
(、るが、マイクロ波帯の周波数では位相伝搬定数の異
方性によるものが減衰量の異方性によるものに比べて支
配的でラシ、干渉信号h(v)と直交偏波信号1−1 
(V )との位相関係はほぼ90゜(橢円偏波成分が大
きい)であることが昶られておシ、退局な初期調整を行
えば補償信号の伽幅のみを変化させればよく、構成が者
しく簡略化され豪雨の場合を除いては十分改善効果をあ
げることができる。
The amount of cross-polarization interference caused by rain varies depending on the frequency.
(However, at frequencies in the microwave band, the anisotropy of the phase propagation constant is more dominant than the anisotropy of the attenuation. The interference signal h(v) and the orthogonal polarization signal 1- 1
It has been shown that the phase relationship with (V) is approximately 90° (the circularly polarized component is large), and if initial adjustments are made, it is only necessary to change the width of the compensation signal. The structure is clearly simplified, and the improvement effect can be sufficiently achieved except in cases of heavy rain.

゛  〔発明の効果〕 以上詳細に説明したように、本発明の交差偏波補償方式
によれば、パイロット信号波を用いることなく、通信用
信号波のビート周波数成分を恢出して交差偏波干渉を補
償することができ、アナログ変調方式の場合でも簡単な
構成で無線チャンネルごとの細かい補償が行える効果が
ある。
[Effects of the Invention] As explained in detail above, according to the cross-polarization compensation method of the present invention, the beat frequency component of a communication signal wave is extracted without using a pilot signal wave to eliminate cross-polarization interference. Even in the case of an analog modulation method, it is possible to perform detailed compensation for each radio channel with a simple configuration.

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

第1図は本発明の第1の実施例のブロック図、第2図は
第1図の可変結合器および制御器の一実施例のブロック
図、第3図は本発明の第2の実施例のブロック図、第4
図は本発明の第3の実施例の受信側のブロック図であ木
。 1.1°、la、la”・・・・・・送信機、2.2’
。 2a、2a’・・・・・・受信機、3,3’・・・・・
・復調器、4.4’4a、4a’、9,9°・・・・・
・振幅検波器、5.5°、5a、5a’・・・・・・可
変結合器、6,6・・・・・・基準ビート信号発生器、
7,7°、7a、7a゛・・・・・・制御器、8.8’
・・・・・・狭帯域フィルタ、11.11’・・・・・
・変調器、12.22・・・・・・局部発振器、13・
・・・・・低周波発振器、14,75,75・・・・・
・位相検波器、15・・・・・・VCO121,21’
・・・・−・加算回路、23,23 t、24,24′
・・・・・・IP増幅器、51,55,71・・・・・
・ハイブリッド(HYB)、52,63.65・・・・
・・位相器、53゜54・・・・・・振幅調整器、56
.56’・・・・・・可変位相器、57.57’・−・
・・・可変減衰器、61,62゜66.66’・・・・
・・ミクサ、72.73,74,74゛・・・・・・同
期検波器、 代理人 弁理士  内 原   晋 察 Z 侶
FIG. 1 is a block diagram of a first embodiment of the present invention, FIG. 2 is a block diagram of an embodiment of the variable coupler and controller of FIG. 1, and FIG. 3 is a block diagram of a second embodiment of the present invention. Block diagram of 4th
The figure is a block diagram of the receiving side of the third embodiment of the present invention. 1.1°, la, la”...Transmitter, 2.2'
. 2a, 2a'... Receiver, 3, 3'...
・Demodulator, 4.4'4a, 4a', 9,9°...
・Amplitude detector, 5.5°, 5a, 5a'...variable coupler, 6,6...reference beat signal generator,
7, 7°, 7a, 7a゛...controller, 8.8'
...Narrowband filter, 11.11'...
・Modulator, 12.22...Local oscillator, 13.
...Low frequency oscillator, 14,75,75...
・Phase detector, 15...VCO121, 21'
...... Addition circuit, 23, 23 t, 24, 24'
...IP amplifier, 51, 55, 71...
・Hybrid (HYB), 52, 63.65...
...Phase shifter, 53゜54...Amplitude adjuster, 56
.. 56'...Variable phase shifter, 57.57'...
...Variable attenuator, 61,62°66.66'...
...Mixer, 72.73,74,74゛...Synchronous detector, Agent Patent attorney Shinsuke Uchihara Z Partner

Claims (1)

【特許請求の範囲】[Claims] 送信局と受信局との間で同一周波数の互いに直交する二
つの偏波を用いて異なった情報を伝送する直交偏波無線
通信方式に用いられ伝送中に発生した交差偏波干渉を受
信局側で除去する交差偏波補償方式において、前記送信
局が第1の偏波で第1の搬送周波数の第1の信号を送信
する送信機と、前記第1の偏波と直交する第2の偏波で
前記第1の搬送周波数と僅かに異なる第2の搬送周波数
の第2の信号を送信する送信機とを備え、前記受信局が
前記第1の偏波で第1の信号を受信する第1の受信機と
、前記第2の偏波で第2の信号を受信する第2の受信機
と、前記第1の受信機の受信信号から前記第1の信号と
第2の信号とのビート周波数成分を検出するビート検出
手段と、前記第2の受信機の受信信号を分岐して少なく
ともその大きたを制御信号により制御し前記第1の受信
機の受信信号に結合する補償信号結合手段と、前記第1
の受信機と前記第2の受信機の受信信号から前記第1の
信号と前記第2の信号とのビート周波数を発生する基準
ビート発生手段と、この基準ビート発生手段および前記
ビート検出手段の出力から前記補償信号結合手段の制御
信号を発生する制御信号発生手段とを備え、前記ビート
検出手段の出力が最小となるよう制御することを特徴と
する交差偏波補償方式。
It is used in the orthogonal polarization wireless communication method, which transmits different information using two mutually orthogonal polarized waves of the same frequency between a transmitting station and a receiving station. In the cross-polarization compensation method, the transmitting station has a transmitter that transmits a first signal of a first carrier frequency with a first polarization, and a second polarization that is orthogonal to the first polarization. a transmitter for transmitting a second signal at a second carrier frequency slightly different from the first carrier frequency in waves, the receiver station receiving the first signal at the first polarization; 1 receiver, a second receiver that receives a second signal with the second polarization, and a beat between the first signal and the second signal from the received signal of the first receiver. beat detection means for detecting frequency components; and compensation signal coupling means for branching the received signal of the second receiver, controlling at least its magnitude by a control signal, and combining it with the received signal of the first receiver. , said first
a reference beat generating means for generating beat frequencies of the first signal and the second signal from the received signals of the receiver and the second receiver; outputs of the reference beat generating means and the beat detecting means; and control signal generating means for generating a control signal for the compensation signal coupling means from the above, and controlling the output of the beat detection means to be minimized.
JP14471284A 1984-07-12 1984-07-12 Compensating system of cross polarized wave Pending JPS6124339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14471284A JPS6124339A (en) 1984-07-12 1984-07-12 Compensating system of cross polarized wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14471284A JPS6124339A (en) 1984-07-12 1984-07-12 Compensating system of cross polarized wave

Publications (1)

Publication Number Publication Date
JPS6124339A true JPS6124339A (en) 1986-02-03

Family

ID=15368533

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14471284A Pending JPS6124339A (en) 1984-07-12 1984-07-12 Compensating system of cross polarized wave

Country Status (1)

Country Link
JP (1) JPS6124339A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004057783A1 (en) * 2002-12-19 2004-07-08 Fujitsu Limited Ofdm transmission/reception apparatus
US7551678B2 (en) 2002-12-19 2009-06-23 Fujitsu Limited OFDM transceiver apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004057783A1 (en) * 2002-12-19 2004-07-08 Fujitsu Limited Ofdm transmission/reception apparatus
US7551678B2 (en) 2002-12-19 2009-06-23 Fujitsu Limited OFDM transceiver apparatus

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