JP3128028B2 - Burst interference wave removal method in superimposed transmission - Google Patents
Burst interference wave removal method in superimposed transmissionInfo
- Publication number
- JP3128028B2 JP3128028B2 JP05027954A JP2795493A JP3128028B2 JP 3128028 B2 JP3128028 B2 JP 3128028B2 JP 05027954 A JP05027954 A JP 05027954A JP 2795493 A JP2795493 A JP 2795493A JP 3128028 B2 JP3128028 B2 JP 3128028B2
- Authority
- JP
- Japan
- Prior art keywords
- power signal
- signal
- high power
- replica
- burst
- 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 - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Noise Elimination (AREA)
- Radio Relay Systems (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば衛星ディジタル
ビデオ通信のように、大電力ビデオ信号および小電力音
声信号を同一の衛星トランスポンダを介して伝送する重
畳伝送方式において小電力音声信号が大電力ビデオ信号
から受ける干渉を除去する重畳伝送におけるバースト干
渉波除去方式に関し、特にビデオ信号がＴＤＭＡ方式の
ようなバーストモードで通信する場合の利用に適する重
畳伝送におけるバースト干渉波除去方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superimposed transmission system for transmitting a high-power video signal and a low-power audio signal via the same satellite transponder, for example, in a satellite digital video communication. The present invention relates to a burst interference wave elimination method in superimposed transmission for eliminating interference received from a video signal, and more particularly to a burst interference wave elimination method in superimposed transmission suitable for use when a video signal communicates in a burst mode such as the TDMA system.
【０００２】[0002]
【従来の技術】衛星ディジタルビデオ通信のように、大
電力ビデオ信号と小電力音声信号を同一の周波数帯を介
して伝送する場合には、小電力信号が大電力信号から受
ける干渉が大きいため、小電力信号の多チャンネル化が
一般に困難であるが、従来、このような小電力信号の多
チャンネル化を図るために、大電力信号が連続モードの
場合には、受信復調した大電力信号を再変調して、連続
モードの大電力信号レプリカを生成し、この生成した大
電力信号レプリカを受信信号に対して逆相合成して、大
電力信号を除去し、小電力信号を抽出することが行われ
ている。2. Description of the Related Art When transmitting a high-power video signal and a low-power audio signal through the same frequency band as in satellite digital video communication, the interference of the low-power signal from the high-power signal is large. It is generally difficult to increase the number of channels of a low-power signal. By performing modulation, a high power signal replica in a continuous mode is generated, and the generated high power signal replica is subjected to out-of-phase synthesis with the received signal to remove the high power signal and extract the low power signal. Have been done.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来の方式で
は、大電力信号がＴＤＭＡ方式のようなバーストモード
の場合にも、大電力信号レプリカは連続モードである
が、大電力信号が無い場合、あるいは再生キャリア、再
生クロックの確立していないプリアンブル部分で受信信
号にレプリカ信号を逆相合成すると、レプリカ信号その
ものが小電力信号にとって干渉信号となってしまうた
め、小電力信号の多チャンネル化が困難となるという問
題がある。In the above-mentioned conventional system, even when a high-power signal is in a burst mode such as the TDMA system, the high-power signal replica is in a continuous mode. Alternatively, if the replica signal is reverse-phase synthesized with the received signal in the preamble portion where the reproduced carrier and the reproduced clock are not established, the replica signal itself becomes an interference signal for the small power signal, so that it is difficult to increase the number of channels of the small power signal. There is a problem that becomes.
【０００４】本発明は、上記に鑑みてなされたもので、
その目的とするところは、バーストモードの大電力信号
と小電力信号を同一の周波数帯を介して同時に伝送する
重畳伝送方式において小電力信号が大電力信号から受け
る干渉を除去する重畳伝送におけるバースト干渉波除去
方式を提供することにある。[0004] The present invention has been made in view of the above,
The purpose is to remove the interference of a small power signal from a large power signal in a superimposed transmission method in which a large power signal and a small power signal in a burst mode are transmitted simultaneously over the same frequency band. It is to provide a wave removing method.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、本発明の重畳伝送におけるバースト干渉波除去方式
は、バーストモードの大電力信号と小電力信号を同一の
周波数帯の伝送路を介して同時に伝送する重畳伝送方式
において小電力信号が大電力信号から受ける干渉を除去
する重畳伝送におけるバースト干渉波除去方式であっ
て、バーストモードの大電力信号と小電力信号が重畳さ
れた信号を受信する受信手段と、該受信手段の受信信号
から前記大電力信号を検出する検出手段と、前記受信手
段の受信信号から前記大電力信号を復調する復調手段
と、該復調手段によって復調された大電力信号の復調信
号から前記大電力信号と同振幅で逆位相の大電力信号レ
プリカを生成する生成手段と、前記検出手段が前記大電
力信号を検出したときのみ、前記生成手段で生成された
大電力信号レプリカを出力するようにゲートするゲート
スイッチ手段と、該ゲートスイッチ手段を介して出力さ
れる前記大電力信号レプリカと前記受信手段の受信信号
とを合成して、前記受信信号から前記大電力信号成分を
除去し、小電力信号を抽出する合成手段とを有すること
を要旨とする。In order to achieve the above object, a burst interference wave removing system in superimposed transmission according to the present invention provides a method for transmitting a large power signal and a small power signal in a burst mode via a transmission line of the same frequency band. Burst interference wave elimination in superimposed transmission for eliminating interference of a small power signal from a large power signal in a superimposed transmission method for simultaneous transmission, and receiving a signal in which a large power signal and a small power signal in a burst mode are superimposed. Receiving means, detecting means for detecting the high power signal from the signal received by the receiving means, demodulating means for demodulating the high power signal from the signal received by the receiving means, and high power signal demodulated by the demodulating means Generating means for generating a high-power signal replica having the same amplitude and opposite phase as the high-power signal from the demodulated signal of the high-power signal, and the detecting means detecting the high-power signal. A gate switch for gated to output the high power signal replica generated by the generation unit; and synthesizing the high power signal replica output via the gate switch and the reception signal of the reception unit. A synthesizing means for removing the high power signal component from the received signal and extracting a low power signal.
【０００６】[0006]
【作用】本発明の重畳伝送におけるバースト干渉波除去
方式では、バーストモードの大電力信号と小電力信号が
重畳された信号を受信し、この受信信号から復調された
大電力信号の復調信号から大電力信号と同振幅で逆位相
の大電力信号レプリカを生成し、前記受信信号から大電
力信号を検出したときのみ、前記生成された大電力信号
レプリカを出力するようにゲートし、このゲート出力さ
れた大電力信号レプリカと受信信号を合成して、受信信
号から大電力信号成分を除去し、小電力信号を抽出す
る。According to the burst interference canceling method in the superimposed transmission of the present invention, a signal in which a large power signal and a small power signal in a burst mode are superimposed is received, and a large power signal demodulated from the received signal is demodulated to a large signal. A high-power signal replica having the same amplitude as the power signal and having the opposite phase is generated, and only when a high-power signal is detected from the received signal, the high-power signal replica is gated so as to output the generated high-power signal replica. The high-power signal replica and the received signal are combined, a high-power signal component is removed from the received signal, and a low-power signal is extracted.
【０００７】[0007]
【実施例】以下、図面を用いて本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１は、本発明の一実施例に係わる重畳伝
送におけるバースト干渉波除去方式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 burst interference wave removing system in superposition transmission according to an embodiment of the present invention.
【０００９】図１において、送信側においては大電力信
号送信装置１からキャリア周波数ｆ1 で電力Ｐ1 を有す
るバーストモードの図２（ａ）に示すような大電力信号
が出力され、また小電力信号送信装置２からキャリア周
波数ｆ1 で電力Ｐ2 を有する図２（ｂ）に示すような小
電力信号が出力され、これらの両装置１，２から出力さ
れた信号は同一の無線伝送路３に送信され伝送される。
無線伝送路３における両信号のスペクトルが図３に示さ
れている。[0009] In FIG 1, high-power signal as shown in Figure 2 of the burst mode having a power P 1 from the large power signal transmitting apparatus 1 at a carrier frequency f 1 (a) is output at the transmitting side, the small power signal transmitter low-power signal as shown in FIG. 2 (b) having a power P 2 from 2 at the carrier frequency f 1 is outputted, the signals output from the two devices 1 and 2 is the same wireless transmission path 3 And transmitted.
FIG. 3 shows the spectra of both signals in the wireless transmission path 3.
【００１０】無線伝送路３を伝送された信号は、図４
（ａ）に示すような信号として受信側で受信され、大電
力信号検出器４、大電力信号復調器５および合成器６に
入力される。大電力信号復調器５は、無線伝送路３から
受信した信号から大電力信号を復調し、レプリカ生成器
７に供給する。レプリカ生成器７は大電力信号復調器５
の出力信号を再変調して、大電力信号と同振幅、逆位相
のレプリカ信号を図４（ｂ）に示すような信号として生
成し、ゲートスイッチ８に供給する。The signal transmitted through the wireless transmission path 3 is shown in FIG.
The signal as shown in (a) is received on the receiving side and input to the high power signal detector 4, the high power signal demodulator 5, and the combiner 6. The high power signal demodulator 5 demodulates a high power signal from the signal received from the wireless transmission path 3 and supplies the high power signal to the replica generator 7. The replica generator 7 is a high power signal demodulator 5
Is re-modulated to generate a replica signal having the same amplitude and opposite phase as the high power signal as a signal as shown in FIG.
【００１１】一方、大電力信号検出器４は、無線伝送路
３から受信した信号から大電力信号の有無を検出し、図
４（ｃ）に示すように大電力信号を検出した場合にオン
となり、検出しない場合にオフとなるような有無検出信
号をゲートスイッチ８に供給して、ゲートスイッチ８を
ゲートし、レプリカ生成器７からのレプリカ信号を図４
（ｄ）に示すような大電力信号でオン−オフされたレプ
リカ信号として合成器６に供給する。合成器６は、無線
伝送路３から受信した信号（図４（ａ））に対してゲー
トスイッチ８を介して供給されるレプリカ信号（図４
（ｄ））を合成して、大電力信号成分を除去し、図４
（ｅ）に示すように小電力信号のみを抽出して出力す
る。On the other hand, the high power signal detector 4 detects the presence or absence of a high power signal from the signal received from the wireless transmission path 3, and turns on when a high power signal is detected as shown in FIG. The presence / absence detection signal which is turned off when no detection is performed is supplied to the gate switch 8, the gate switch 8 is gated, and the replica signal from the replica generator 7 is
The signal is supplied to the synthesizer 6 as a replica signal which is turned on / off by a large power signal as shown in FIG. The combiner 6 supplies a replica signal (FIG. 4A) supplied via the gate switch 8 to the signal (FIG. 4A) received from the wireless transmission path 3.
(D)) to remove the high power signal component,
As shown in (e), only the low power signal is extracted and output.
【００１２】図５は、図１に示した大電力信号検出器４
の構成を示すブロック図である。この大電力信号検出器
４は、無線伝送路３から受信された信号を包絡線検波器
４ａに入力して、受信信号電力を測定し、受信信号の包
絡線信号を検波する。この信号はゲート信号生成器４ｂ
に供給されて、所定のしきい値と比較され、該しきい値
を超えた場合を大電力信号が存在するものとして検出情
報として出力し、図４（ｃ）に示すような有無検出信号
を発生している。FIG. 5 shows the high power signal detector 4 shown in FIG.
FIG. 3 is a block diagram showing the configuration of FIG. The high power signal detector 4 inputs the signal received from the wireless transmission path 3 to an envelope detector 4a, measures the received signal power, and detects the envelope signal of the received signal. This signal is generated by the gate signal generator 4b.
Is compared with a predetermined threshold value, and when it exceeds the threshold value, it is output as detection information as the presence of a large power signal, and the presence / absence detection signal as shown in FIG. It has occurred.
【００１３】図６は、図１に示したレプリカ生成器７の
構成を示すブロック図である。このレプリカ生成器７
は、大電力信号復調器５で復調された大電力信号を再変
調器７ａで再変調し、更に振幅位相調整回路７ｂで振
幅、位相を調整して、大電力信号と同振幅で逆位相のレ
プリカ信号を出力している。FIG. 6 is a block diagram showing a configuration of the replica generator 7 shown in FIG. This replica generator 7
Remodulates the large power signal demodulated by the large power signal demodulator 5 with the re-modulator 7a, and further adjusts the amplitude and phase with the amplitude / phase adjustment circuit 7b to obtain the same amplitude and opposite phase as the large power signal. Outputs a replica signal.
【００１４】[0014]
【発明の効果】以上説明したように、本発明によれば、
バーストモードの大電力信号と小電力信号が重畳された
信号を受信し、この受信信号から復調された大電力信号
の復調信号から大電力信号と同振幅で逆位相の大電力信
号レプリカを生成し、前記受信信号から大電力信号を検
出したときのみ、前記生成された大電力信号レプリカを
出力するようにゲートし、このゲート出力された大電力
信号レプリカと受信信号を合成して、受信信号から大電
力信号成分を除去し、小電力信号を抽出するので、大電
力信号が無い場合または再生キャリア、再生クロックの
確立していないプリアンブル部分ではレプリカ信号を逆
相合成しないため、従来のようにレプリカ信号が小電力
信号に対する干渉信号となることが無く、連続モードの
場合と同様に小電力信号の多チャンネル化が可能とな
る。As described above, according to the present invention,
A signal in which a large power signal and a small power signal in a burst mode are superimposed is received, and a large power signal replica having the same amplitude and opposite phase as the large power signal is generated from a demodulated signal of the large power signal demodulated from the received signal. Only when a high-power signal is detected from the received signal, the generated high-power signal replica is gated to be output, and the gate-output high-power signal replica and the received signal are combined, and Since the high-power signal component is removed and the low-power signal is extracted, the replica signal is not reverse-phase synthesized in the absence of the high-power signal or in the preamble portion where the reproduction carrier and the reproduction clock are not established. The signal does not become an interference signal with respect to the low power signal, and it is possible to increase the number of channels of the low power signal as in the case of the continuous mode.
【図１】本発明の一実施例に係わる重畳伝送におけるバ
ースト干渉波除去方式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 burst interference wave removal system in superimposed transmission according to an embodiment of the present invention.
【図２】図１の重畳伝送におけるバースト干渉波除去方
式における大電力信号送信装置および小電力信号送信装
置の出力波形を示す図である。FIG. 2 is a diagram showing output waveforms of a large power signal transmitting device and a small power signal transmitting device in a burst interference wave removing system in the superimposed transmission of FIG.
【図３】図１に示す重畳伝送におけるバースト干渉波除
去方式における無線伝送路での信号スペクトルを示す図
である。FIG. 3 is a diagram showing a signal spectrum on a wireless transmission path in a burst interference wave removal system in the superimposed transmission shown in FIG. 1;
【図４】図１に示す重畳伝送におけるバースト干渉波除
去方式における各部の信号波形を示す図である。FIG. 4 is a diagram showing signal waveforms of respective units in the burst interference wave removal system in the superimposed transmission shown in FIG.
【図５】図１に示す重畳伝送におけるバースト干渉波除
去方式に使用されている大電力信号検出器４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 high power signal detector 4 used for a burst interference wave removal system in the superimposed transmission shown in FIG.
【図６】図１に示す重畳伝送におけるバースト干渉波除
去方式に使用されているレプリカ生成器７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 replica generator 7 used for a burst interference wave removal system in the superimposed transmission shown in FIG.
１ 大電力信号送信装置 ２ 小電力信号送信装置 ３ 無線伝送路 ４ 大電力信号検出器 ５ 大電力信号復調器 ６ 合成器 ７ レプリカ生成器 ８ ゲートスイッチ REFERENCE SIGNS LIST 1 high power signal transmission device 2 low power signal transmission device 3 wireless transmission path 4 high power signal detector 5 high power signal demodulator 6 combiner 7 replica generator 8 gate switch
───────────────────────────────────────────────────── フロントページの続き (72)発明者 加藤 修三 東京都千代田区内幸町１丁目１番６号 日本電信電話株式会社内 (58)調査した分野(Int.Cl.7，ＤＢ名) H04B 1/10 H04B 7/212 H04J 15/00 H04N 7/20 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shuzo Kato 1-6-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (58) Field surveyed (Int. Cl. 7 , DB name) H04B 1 / 10 H04B 7/212 H04J 15/00 H04N 7/20
Claims (1)
号を同一の周波数帯の伝送路を介して同時に伝送する重
畳伝送方式において小電力信号が大電力信号から受ける
干渉を除去する重畳伝送におけるバースト干渉波除去方
式であって、バーストモードの大電力信号と小電力信号
が重畳された信号を受信する受信手段と、該受信手段の
受信信号から前記大電力信号を検出する検出手段と、前
記受信手段の受信信号から前記大電力信号を復調する復
調手段と、該復調手段によって復調された大電力信号の
復調信号から前記大電力信号と同振幅で逆位相の大電力
信号レプリカを生成する生成手段と、前記検出手段が前
記大電力信号を検出したときのみ、前記生成手段で生成
された大電力信号レプリカを出力するようにゲートする
ゲートスイッチ手段と、該ゲートスイッチ手段を介して
出力される前記大電力信号レプリカと前記受信手段の受
信信号とを合成して、前記受信信号から前記大電力信号
成分を除去し、小電力信号を抽出する合成手段とを有す
ることを特徴とする重畳伝送におけるバースト干渉波除
去方式。1. A burst in superimposed transmission for removing interference of a small power signal from a large power signal in a superimposed transmission method for simultaneously transmitting a large power signal and a small power signal in a burst mode via a transmission line of the same frequency band. An interference wave canceling method, wherein a receiving means for receiving a signal in which a high power signal and a low power signal in a burst mode are superimposed; a detecting means for detecting the high power signal from a received signal of the receiving means; Demodulating means for demodulating the high power signal from the received signal of the means, and generating means for generating a high power signal replica having the same amplitude and opposite phase as the high power signal from the demodulated signal of the high power signal demodulated by the demodulating means. And gate switch means for gating so as to output the high power signal replica generated by the generation means only when the detection means detects the high power signal. Combining the high power signal replica output through the gate switch means and the reception signal of the reception means, removing the high power signal component from the reception signal, and extracting a low power signal Means for eliminating a burst interference wave in superimposed transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05027954A JP3128028B2 (en) | 1993-02-17 | 1993-02-17 | Burst interference wave removal method in superimposed transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05027954A JP3128028B2 (en) | 1993-02-17 | 1993-02-17 | Burst interference wave removal method in superimposed transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06244746A JPH06244746A (en) | 1994-09-02 |
| JP3128028B2 true JP3128028B2 (en) | 2001-01-29 |
Family
ID=12235290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05027954A Expired - Fee Related JP3128028B2 (en) | 1993-02-17 | 1993-02-17 | Burst interference wave removal method in superimposed transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3128028B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6306480B2 (en) * | 2014-09-08 | 2018-04-04 | 株式会社Ｋｄｄｉ総合研究所 | Detection device, control method, and program |
-
1993
- 1993-02-17 JP JP05027954A patent/JP3128028B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06244746A (en) | 1994-09-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |