JP3175068B2 - Automatic initial acquisition time division multiple access equipment - Google Patents
Automatic initial acquisition time division multiple access equipmentInfo
- Publication number
- JP3175068B2 JP3175068B2 JP05635893A JP5635893A JP3175068B2 JP 3175068 B2 JP3175068 B2 JP 3175068B2 JP 05635893 A JP05635893 A JP 05635893A JP 5635893 A JP5635893 A JP 5635893A JP 3175068 B2 JP3175068 B2 JP 3175068B2
- Authority
- JP
- Japan
- Prior art keywords
- station
- satellite
- initial acquisition
- multiple access
- division multiple
- 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
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
- Radio Relay Systems (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、衛星通信用時分割多元
接続方式における送信同期確立時の初期捕捉技術に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an initial acquisition technique at the time of establishing transmission synchronization in a time division multiple access system for satellite communication.
【０００２】[0002]
【従来の技術】衛星通信用時分割多元接続方式では、基
準局が各局の送出する同期バーストを受信し正規位置か
らの誤差情報を各局に送り、衛星上で各局の送信するバ
ーストが同一フレーム（図２(2))上に送信されるように
制御する。しかし、送信同期が確立する前には上記制御
ができないので、送信を行う場合は初期捕捉手順を行
う。まず、受信同期の確立した受信フレーム（図２(1))
から自局の位置情報による伝搬遅延時間を考慮し送信フ
レーム（図２(3))を推定し、初期捕捉領域へ初期捕捉バ
ーストを送信する。該初期捕捉バーストを基準局にて受
信し正規位置からの誤差情報（図２(4))を送信局に送
る。送信局では基準局からの誤差情報により送信バース
ト位置を補正し送信する。この手順を繰り返し送信バー
スト位置が正規位置になったら前記送信同期手順に移行
する。2. Description of the Related Art In a time division multiple access system for satellite communication, a reference station receives a synchronous burst transmitted from each station and sends error information from a normal position to each station. 2 (2)). However, since the above control cannot be performed before transmission synchronization is established, an initial acquisition procedure is performed when performing transmission. First, a received frame for which reception synchronization has been established (Fig. 2 (1))
, The transmission frame (FIG. 2 (3)) is estimated in consideration of the propagation delay time based on the position information of the own station, and the initial acquisition burst is transmitted to the initial acquisition area. The initial acquisition burst is received by the reference station, and error information (FIG. 2 (4)) from the normal position is sent to the transmitting station. The transmitting station corrects the transmission burst position based on the error information from the reference station and transmits. This procedure is repeated, and when the transmission burst position becomes the normal position, the process proceeds to the transmission synchronization procedure.
【０００３】従来は、前記初期捕捉手順のうち送信局の
地上における位置の情報はスイッチ等により固定的に与
えられており、送信局が移動した場合、移動位置に応じ
てスイッチの設定値を変えなければならなかった。Conventionally, information on the position of the transmitting station on the ground in the initial acquisition procedure is fixedly provided by a switch or the like, and when the transmitting station moves, the set value of the switch is changed according to the moving position. I had to.
【０００４】[0004]
【発明が解決しようとする課題】前述したように、従来
の初期捕捉手順では送信局の位置情報がスイッチ等によ
り固定的に与えられていたため、地球局（時分割多元接
続装置）が移動するたびに自局の位置（緯度，経度）を
計算し、スイッチの設定値を変えなければならなかっ
た。また、送信局の位置情報がまちがっていた場合（ス
イッチの設定ミス等）、推定した送信フレームの初期捕
捉領域（図３(1))と正規の初期捕捉領域（図２(2))との
誤差が大きくなるので、初期捕捉バーストを送信すると
他バーストとの衝突が起こりシステムダウンの可能性が
ある。As described above, in the conventional initial acquisition procedure, since the position information of the transmitting station is fixedly given by a switch or the like, every time the earth station (time division multiple access device) moves. First, the position (latitude, longitude) of the own station was calculated, and the setting value of the switch had to be changed. If the position information of the transmitting station is incorrect (switch setting error, etc.), the estimated initial capture area of the transmission frame (FIG. 3 (1)) and the normal initial capture area (FIG. 2 (2)) Since the error becomes large, when the initial acquisition burst is transmitted, a collision with another burst occurs and there is a possibility that the system goes down.
【０００５】そこで、本発明では、地球局（時分割多元
接続装置）に自局の位置（緯度，経度）を測定する手段
を備え、その情報を用いることにより、手動での自局の
位置設定（スイッチ）を省き、自動的に初期捕捉のため
の自局の位置設定を行い、初期捕捉の簡略化，自動化お
よび高信頼化を図ることを目的とする。Therefore, in the present invention, the earth station (time division multiple access device) is provided with means for measuring the position (latitude, longitude) of the own station, and by using the information, the position setting of the own station is performed manually. (Switch) is omitted, and the position of the own station is automatically set for the initial acquisition, thereby simplifying, automating, and increasing the reliability of the initial acquisition.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
の本発明の特徴は、衛星通信用時分割多元接続方式で送
信同期確立時の初期捕捉において、自局の緯度，経度を
自動測定する手段と、該位置情報と任意の衛星の定常位
置情報から自局と衛星の定常位置までの距離を計算する
手段と、基準局が送信する基準局で測定した衛星の現在
位置と定常位置との変動量を受信し該変動量と前記自局
と衛星の定常位置までの距離情報から自局と衛星の現在
位置までの距離を計算する手段と、基準局からの受信信
号より受信フレームを確立する手段とを備え、該受信フ
レームと前記自局と衛星の現在位置までの距離情報より
送信フレームタイミングを決定し、初期捕捉領域へ初期
捕捉バーストを送信することにある。A feature of the present invention to achieve the above object is to automatically measure the latitude and longitude of the own station in initial acquisition at the time of establishment of transmission synchronization in a time division multiple access system for satellite communication. Means, a means for calculating the distance between the own station and the steady position of the satellite from the position information and the steady position information of any satellite, and the amount of change between the current position and the steady position of the satellite measured by the reference station transmitted by the reference station Means for calculating the distance between the own station and the current position of the satellite from the fluctuation amount and the distance information between the own station and the stationary position of the satellite, and means for establishing a reception frame from a received signal from the reference station. And determining the transmission frame timing based on the received frame and information on the distance between the own station and the current position of the satellite, and transmitting an initial acquisition burst to an initial acquisition area.
【０００７】[0007]
【作用】本発明は、時分割多元接続方式の初期捕捉手順
において、自局の位置（緯度，経度）を測定する手段を
備えることにより自動的に自局の位置設定を行うので、
従来の技術に比べ、初期捕捉の簡略化，自動化および高
信頼化を図ることができる。According to the present invention, in the initial acquisition procedure of the time division multiple access method, the position of the own station is automatically set by providing means for measuring the position (latitude, longitude) of the own station.
Compared with the conventional technology, simplification, automation and high reliability of the initial capture can be achieved.
【０００８】[0008]
【実施例】図１は、本発明の一実施例であり、以下のよ
うに動作する。FIG. 1 shows an embodiment of the present invention, and operates as follows.
【０００９】受信部１において、基準局同期バースト検
出部１６により基準同期バーストを検出することにより
受信同期を確立する。自局位置測定部２において、自局
の位置（緯度および経度）を測定し、衛星の現在位置
（緯度および経度）から衛星と自局の距離を計算し衛星
までの伝搬遅延を算出する。送信部３において、受信部
１の受信フレームカウンタ１ａからの受信フレームと自
局位置測定部２からの伝搬遅延情報とから送信フレーム
を推定し、該送信フレームの予め指定された初期捕捉領
域に送出部３ｂにより初期捕捉バーストを送信する。初
期捕捉バースト送信以降は従来技術と同様に、初期捕捉
バーストを基準局にて受信し正規位置からの誤差情報を
送信局に送り、送信局では基準局からの誤差情報により
送信バースト位置を補正し送信する。この手順を繰り返
し送信バースト位置が正規位置になったら前記送信同期
手順に移行する。[0009] In the receiving section 1, reception synchronization is established by detecting a reference synchronization burst by the reference station synchronization burst detection section 16. The own station position measuring unit 2 measures the position (latitude and longitude) of the own station, calculates the distance between the satellite and the own station from the current position (latitude and longitude) of the satellite, and calculates the propagation delay to the satellite. The transmission unit 3 estimates a transmission frame from the reception frame from the reception frame counter 1a of the reception unit 1 and the propagation delay information from the local station position measurement unit 2, and sends the transmission frame to a predetermined initial capture area of the transmission frame. The initial acquisition burst is transmitted by the unit 3b. After the initial acquisition burst transmission, as in the prior art, the initial acquisition burst is received by the reference station, error information from the normal position is sent to the transmission station, and the transmission station corrects and transmits the transmission burst position based on the error information from the reference station. . This procedure is repeated, and when the transmission burst position becomes the normal position, the process proceeds to the transmission synchronization procedure.
【００１０】現在、位置測定の方法としては、磁気方位
センサ，光ファイバジャイロおよび衛星を用いた測位シ
ステムであるＧＰＳ（Global Positioning System)など
があり、これらを利用して正確に自局の位置を測定する
ことが可能である。At present, methods of position measurement include a magnetic azimuth sensor, an optical fiber gyro, a GPS (Global Positioning System) which is a positioning system using a satellite, and the like. It is possible to measure.
【００１１】[0011]
【発明の効果】以上のように、本発明によれば、時分割
多元接続方式の初期捕捉手順において、自局の位置（緯
度，経度）を測定する手段を備え自動的に自局の位置情
報を設定することにより、手動での自局位置の設定（ス
イッチ）を省き、初期捕捉の簡略化，自動化および高信
頼化を図ることができる。また、自局の位置（緯度，経
度）を常に測定し自局の位置情報を書き換えることによ
り、地球局が移動中に送信同期が外れた場合においても
最新の自局の位置情報を用いて精度の良い初期捕捉を行
うことができる。As described above, according to the present invention, means for measuring the position (latitude, longitude) of the own station is provided in the initial acquisition procedure of the time division multiple access system, and the position information of the own station is automatically obtained. By setting (1), it is possible to omit the manual setting (switch) of the own station position, and to simplify initial acquisition, automate the operation, and increase the reliability. Also, by constantly measuring the position (latitude, longitude) of the own station and rewriting the own station's position information, even if the transmission synchronization is lost while the earth station is moving, the latest station's own position information is used for accuracy. Good initial capture can be performed.
【図１】本発明による一実施例を示す。FIG. 1 shows one embodiment according to the present invention.
【図２】衛星上のフレームと受信フレームおよび送信フ
レームを示す。FIG. 2 shows a frame on a satellite, a received frame and a transmitted frame.
【図３】初期捕捉領域を示す。FIG. 3 shows an initial capture area.
１ 受信部 ２ 位置測定部 ３ 送信部 ４ アンテナ DESCRIPTION OF SYMBOLS 1 Receiving part 2 Position measuring part 3 Transmitting part 4 Antenna
───────────────────────────────────────────────────── 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一丁目１番６号日 本電信電話株式会社内 (56)参考文献 特開 昭56−20342（ＪＰ，Ａ) 特開 昭59−6640（ＪＰ，Ａ) 特開 昭64−39127（ＪＰ，Ａ) 特開 昭58−47338（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04B 7/14 - 7/22 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shuzo Kato 1-6-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Inside the Telegraph and Telephone Corporation (56) References JP-A-56-20342 (JP, A) JP-A JP-A-59-6640 (JP, A) JP-A-64-39127 (JP, A) JP-A-58-47338 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H04B 7 / 14-7/22
Claims (1)
期確立時の初期捕捉において、自局の緯度，経度を自動
測定する手段と、該位置情報と任意の衛星の定常位置情
報から自局と衛星の定常位置までの距離を計算する手段
と、基準局が送信する基準局で測定した衛星の現在位置
と定常位置との変動量を受信し該変動量と前記自局と衛
星の定常位置までの距離情報から自局と衛星の現在位置
までの距離を計算する手段と、基準局からの受信信号よ
り受信フレームを確立する手段とを備え、該受信フレー
ムと前記自局と衛星の現在位置までの距離情報より送信
フレームタイミングを決定し、初期捕捉領域へ初期捕捉
バーストを送信することを特徴とする自動初期捕捉時分
割多元接続装置。1. A means for automatically measuring the latitude and longitude of an own station in an initial acquisition at the time of transmission synchronization establishment in a time division multiple access system for satellite communication, and a self-station based on the position information and the stationary position information of an arbitrary satellite. Means for calculating the distance to the stationary position of the satellite, and the amount of change between the current position and the stationary position of the satellite measured by the reference station transmitted by the reference station, and receiving the amount of change and the amount of change between the own station and the stationary position of the satellite. Means for calculating a distance between the own station and the current position of the satellite from the distance information, and means for establishing a reception frame from a received signal from the reference station, wherein the distance between the received frame and the current position of the own station and the satellite is provided. An automatic initial acquisition time-division multiple access device, wherein a transmission frame timing is determined from information and an initial acquisition burst is transmitted to an initial acquisition area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05635893A JP3175068B2 (en) | 1993-02-23 | 1993-02-23 | Automatic initial acquisition time division multiple access equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05635893A JP3175068B2 (en) | 1993-02-23 | 1993-02-23 | Automatic initial acquisition time division multiple access equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06252814A JPH06252814A (en) | 1994-09-09 |
| JP3175068B2 true JP3175068B2 (en) | 2001-06-11 |
Family
ID=13025028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05635893A Expired - Fee Related JP3175068B2 (en) | 1993-02-23 | 1993-02-23 | Automatic initial acquisition time division multiple access equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3175068B2 (en) |
-
1993
- 1993-02-23 JP JP05635893A patent/JP3175068B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06252814A (en) | 1994-09-09 |
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Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20010227 |
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