JP2010136316A5 - - Google Patents
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- JP2010136316A5 JP2010136316A5 JP2009058295A JP2009058295A JP2010136316A5 JP 2010136316 A5 JP2010136316 A5 JP 2010136316A5 JP 2009058295 A JP2009058295 A JP 2009058295A JP 2009058295 A JP2009058295 A JP 2009058295A JP 2010136316 A5 JP2010136316 A5 JP 2010136316A5
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- JP
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- signal
- activation flag
- flag signal
- value
- synchronization
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- 230000004913 activation Effects 0.000 claims 36
- 239000000969 carrier Substances 0.000 claims 7
- 230000005540 biological transmission Effects 0.000 claims 6
- 230000000051 modifying Effects 0.000 claims 4
- 125000004122 cyclic group Chemical group 0.000 claims 2
- 230000001702 transmitter Effects 0.000 claims 1
Claims (10)
緊急速報の有無を識別するための起動フラグ信号と、前記起動フラグ信号の隣接する前後のシンボルに位置する振幅と位相の情報が予め定められた既知信号と、前記既知信号の前段に配置される、前記ＡＣ信号のフレーム長を認識してフレーム同期を行うための同期信号と、当該緊急速報の情報とを含む電文情報が送信側から前記ＡＣ信号にてＤＢＰＳＫ変調されて伝送されるように予め規定されており、前記既知信号のうち前記起動フラグ信号の前のシンボルに位置する既知信号は、前記同期信号の最終ビットからなり、前記起動フラグ信号は、前記既知信号のうち前記起動フラグ信号の後のシンボルに位置する前記既知信号と連続して送信される、緊急速報の有無を識別する値を冗長させるために連続した同一のビット値の２ビットからなり、
ＤＢＰＳＫ変調された前記ＡＣ信号のキャリアを受信するキャリア受信手段と、
前記ＡＣ信号のフレームを検出して前記ＡＣ信号に含まれる前記同期信号に基づいて前記ＡＣ信号のフレーム同期を行うフレーム同期手段と、
前記フレーム同期手段によって取得されたタイミングに従い、前記既知信号を検出し、送信側から前記起動フラグ信号を受信するまでの伝搬路特性を推定する伝搬路推定手段と、
前記伝搬路特性に基づいて前記起動フラグ信号の復調を行う起動フラグ復調手段と、
前記起動フラグ復調手段によって復調された前記起動フラグ信号の値を監視して、緊急速報の有無を判別する起動フラグ監視手段とを備え、
前記伝搬路推定手段は、前記２ビットの該起動フラグ信号のうちの２ビット目を前記既知信号のうち前記起動フラグ信号の後のシンボルに位置する既知信号として検出し、同期信号の最終ビットの値と前記既知信号のうち前記起動フラグ信号の後のシンボルに位置する既知信号とから、前記起動フラグ信号を受信するまでの伝搬路特性を推定することを特徴とする受信装置。 A receiving device for receiving an AC signal from a terrestrial digital television broadcast wave,
An activation flag signal for identifying the presence or absence of emergency warning, amplitude and phase information located in adjacent symbols before and after the activation flag signal are arranged in advance and a stage preceding the known signal. The telegram information including the synchronization signal for recognizing the frame length of the AC signal and performing the frame synchronization and the information of the emergency early warning is transmitted in advance from the transmission side after being DBPSK modulated by the AC signal. The known signal located in the symbol before the activation flag signal among the known signals is composed of the last bit of the synchronization signal, and the activation flag signal is the signal of the activation flag signal among the known signals. In order to make redundant the value for identifying the presence or absence of emergency bulletin transmitted continuously with the known signal located in the later symbol, from two consecutive bits of the same bit value Ri,
Carrier receiving means for receiving a carrier of the AC signal modulated by DBPSK ;
And frame synchronization means for performing frame synchronization of the AC signal based on the synchronization signals by detecting a frame of the AC signal included in the AC signal,
In accordance with the timing acquired by the frame synchronization means, the propagation path estimation means for detecting the known signal and estimating the propagation path characteristics until the activation flag signal is received from the transmission side;
Activation flag demodulating means for demodulating the activation flag signal based on the propagation path characteristics;
Monitoring the value of the activation flag signal demodulated by said start flag demodulating means, and a start flag monitoring means for determining the presence or absence of emergency bulletin,
The propagation path estimation means detects the second bit of the two-bit activation flag signal as a known signal located in a symbol after the activation flag signal in the known signal, and determines the last bit of the synchronization signal. A receiving apparatus for estimating a propagation path characteristic until receiving the activation flag signal from a value and a known signal located in a symbol after the activation flag signal among the known signals .
緊急速報の有無を識別するための起動フラグ信号と、前記起動フラグ信号の隣接する前後のシンボルに位置する振幅と位相の情報が予め定められた既知信号と、前記既知信号の前段に配置される、前記ＡＣ信号のフレーム長を認識してフレーム同期を行うための同期信号と、当該緊急速報の情報とを含む電文情報をＤＢＰＳＫ変調で前記ＡＣ信号にて伝送する手段を備え、An activation flag signal for identifying the presence or absence of emergency warning, amplitude and phase information located in adjacent symbols before and after the activation flag signal are arranged in advance and a stage preceding the known signal. And means for transmitting the telegram information including the synchronization signal for recognizing the frame length of the AC signal and performing the frame synchronization and the information of the emergency early warning in the AC signal by DBPSK modulation,
前記既知信号のうち前記起動フラグ信号の前のシンボルに位置する既知信号は、前記同期信号の最終ビットからなり、前記起動フラグ信号は、前記既知信号のうち前記起動フラグ信号の後のシンボルに位置する前記既知信号と連続して送信される、緊急速報の有無を識別する値を冗長させるために連続した同一のビット値の２ビットからなることを特徴とする送信装置。The known signal located in the symbol before the activation flag signal in the known signal is composed of the last bit of the synchronization signal, and the activation flag signal is located in the symbol after the activation flag signal in the known signal. A transmitter comprising two consecutive bits having the same bit value for making redundant a value for identifying the presence or absence of emergency bulletin transmitted continuously with the known signal.
受信側が、前記ＡＣ信号のキャリアを受信し、前記ＡＣ信号のフレームを検出して前記ＡＣ信号に含まれる前記同期信号に基づいて前記ＡＣ信号のフレーム同期を行い、前記既知信号を検出し、送信側から前記起動フラグ信号を受信するまでの伝搬路特性を推定し、前記伝搬路特性に基づいて前記起動フラグ信号の復調を行ない、復調された前記起動フラグ信号の値を監視して、緊急速報の有無を判別することを可能にするとともに、前記２ビットの該起動フラグ信号のうちの２ビット目を前記既知信号のうち前記起動フラグ信号の後のシンボルに位置する既知信号として検出し、同期信号の最終ビットの値と前記既知信号のうち前記起動フラグ信号の後のシンボルに位置する既知信号とから、前記起動フラグ信号を受信するまでの伝搬路特性を推定できるようにしたことを特徴とする、請求項９に記載の送信装置。The receiving side receives the carrier of the AC signal, detects the frame of the AC signal, performs frame synchronization of the AC signal based on the synchronization signal included in the AC signal, detects the known signal, and transmits The propagation path characteristic until the activation flag signal is received from the side is estimated, the activation flag signal is demodulated based on the propagation path characteristic, and the value of the demodulated activation flag signal is monitored. And detecting the second bit of the two-bit activation flag signal as a known signal located in a symbol after the activation flag signal in the known signal, and synchronizing A propagation path characteristic from the value of the last bit of the signal and the known signal located in the symbol after the activation flag signal among the known signals to the reception of the activation flag signal. Characterized in that to allow estimate the transmission device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009058295A JP5193910B2 (en) | 2008-10-29 | 2009-03-11 | Receiving device for receiving emergency bulletin in digital terrestrial television broadcasting, and transmitting device for transmitting emergency breaking news |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008278910 | 2008-10-29 | ||
| JP2008278910 | 2008-10-29 | ||
| JP2009058295A JP5193910B2 (en) | 2008-10-29 | 2009-03-11 | Receiving device for receiving emergency bulletin in digital terrestrial television broadcasting, and transmitting device for transmitting emergency breaking news |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2010136316A JP2010136316A (en) | 2010-06-17 |
| JP2010136316A5 true JP2010136316A5 (en) | 2011-02-24 |
| JP5193910B2 JP5193910B2 (en) | 2013-05-08 |
Family
ID=42347100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009058295A Active JP5193910B2 (en) | 2008-10-29 | 2009-03-11 | Receiving device for receiving emergency bulletin in digital terrestrial television broadcasting, and transmitting device for transmitting emergency breaking news |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5193910B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105704513B (en) * | 2016-02-01 | 2018-06-22 | 重庆三峡学院 | Terrestrial DTV wireless network Monitoring and Service System |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001313628A (en) * | 2000-04-28 | 2001-11-09 | Sony Corp | Ofdm receiver and ofm reception method |
| JP4758677B2 (en) * | 2005-05-13 | 2011-08-31 | 日本放送協会 | Transmission control signal receiver and digital terrestrial television broadcast receiver using the same |
-
2009
- 2009-03-11 JP JP2009058295A patent/JP5193910B2/en active Active
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