CN201328162Y - Broadcast television signal transmission system and device with same - Google Patents
Broadcast television signal transmission system and device with same Download PDFInfo
- Publication number
- CN201328162Y CN201328162Y CNU2008201233051U CN200820123305U CN201328162Y CN 201328162 Y CN201328162 Y CN 201328162Y CN U2008201233051 U CNU2008201233051 U CN U2008201233051U CN 200820123305 U CN200820123305 U CN 200820123305U CN 201328162 Y CN201328162 Y CN 201328162Y
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- broadcast television
- base station
- signal
- high frequency
- frequency carrier
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Abstract
The utility model discloses a broadcast television signal transmission system and a device with the same, which are used for reducing noises of a high-frequency carrier with broadcast television signals transmitted from a base station and improving the broadcast television signal coverage effect. The utility model provides a base station, which comprises an analog-digital conversion unit used for converting the high-frequency carrier with broadcast television signals transmitted by a broadcast television transmission device into digital signals, a digital processing unit used for delay processing the digital signals, the analog-digital conversion unit used for converting the digital signals after delay processing into analog signals, and a transmission unit used for transmitting the analog signals to user terminals after the analog-digital conversion unit is processed.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of emission system and device of broadcast television signal.
Background technology
In order to realize that television broadcasting signal large tracts of land signal covers, prior art is general to adopt many base stations with frequency synchronized transmissions broadcast television signal, for the same frequency synchronous transmission that realizes broadcast television signal covers, the broadcast television signal that promptly makes each adjacent base station send is synchronous, often need control the time delay of the carrier signal that contains broadcast television signal of the emission of each base station, time of carrier signal of containing broadcast television signal with the emission of guaranteeing each base station is in full accord.
As shown in Figure 1, the transmission course of broadcast television signal of the prior art comprises:
Broadcast television transmissions equipment is transferred to each base station with broadcast television signal, and each base station obtains containing the high frequency carrier f0 of broadcast television signal, and f0 simulates time delay processing to high frequency carrier, launches after processing and amplifying again.
This shows, prior art is in the whole transmission course of broadcast television signal, what adopt all is analog signal processing technology, and analog signal processing technology can't be removed noise, therefore each base station adopts simulation time delay processing method that the high frequency carrier f0 that contains broadcast television signal is carried out time delay processing, the carrier-to-noise ratio deterioration that can cause the high frequency carrier that contains broadcast singal of base station, and increase along with distance between the base station and relay station quantity, the carrier noise coefficient that contains the high frequency carrier f0 of broadcast television signal can constantly increase, thereby influences the coverage effect of broadcast television signal.
In sum, the noise of the high frequency carrier that contains broadcast television signal of prior art base station is bigger, influences the coverage effect of broadcast television signal.
The utility model content
The utility model embodiment provides a kind of emission system and device of broadcast television signal, in order to the noise of the high frequency carrier that contains broadcast television signal that reduces base station, improves the coverage effect of broadcast television signal.
The emitter of a kind of broadcast television signal that the utility model embodiment provides comprises:
AD conversion unit is used for converting the high frequency carrier that contains broadcast television signal that broadcast television transmissions equipment sends to digital signal;
Digital processing element is used for described digital signal is carried out delay process;
D/A conversion unit is used for and will be converted to analog signal through the digital signal after the described delay process;
Transmitter unit is used for the analog signal after handling through described D/A conversion unit is transmitted to user terminal.
The emission system of a kind of broadcast television signal that the utility model embodiment provides comprises: broadcast television transmissions equipment and at least one base station;
Described broadcast television transmissions equipment is used for broadcast television signal is carried out modulation treatment, generates the high frequency carrier that contains this broadcast television signal, and this high frequency carrier is sent to the base station;
Described base station is used for converting described high frequency carrier to digital signal; Described digital signal is carried out delay process; Be transmitted to user terminal after will being converted to analog signal through the digital signal after the described delay process.
The utility model embodiment, the base station comprises AD conversion unit, digital processing element, D/A conversion unit and transmitter unit, wherein, AD conversion unit is used for converting the high frequency carrier that contains broadcast television signal that broadcast television transmissions equipment sends to digital signal; Digital processing element is used for described digital signal is carried out delay process; D/A conversion unit is used for and will be converted to analog signal through the digital signal after the described delay process; Transmitter unit, analog signal after being used for handling through described D/A conversion unit is transmitted to user terminal, thereby make the broadcast television transmissions device transmission be able to filtering for the noise in the high frequency carrier that contains broadcast television signal of base station, and having avoided prior art that the high frequency carrier that contains broadcast singal is carried out the noise that the time delay adjustment caused adds up, thereby improved the signal launch mass, and make that the adjustable extent of time delay is bigger, and precision is higher, and system debug is simple more, convenient.
Description of drawings
Fig. 1 is the transmission course schematic diagram of broadcast television signal of the prior art;
The structural representation of the emission system of a kind of broadcast television signal that Fig. 2 provides for the utility model embodiment;
The structural representation of a kind of broadcast television transmissions equipment that Fig. 3 provides for the utility model embodiment;
The structural representation of a kind of base station that Fig. 4 provides for the utility model embodiment;
The emission process schematic diagram of a kind of broadcast television signal that Fig. 5 provides for the utility model embodiment.
Embodiment
The utility model embodiment provides a kind of emission system and device of broadcast television signal, in order to the noise of the high frequency carrier that contains broadcast television signal that reduces base station, improves the coverage effect of broadcast television signal.
Referring to Fig. 2, the emission system of a kind of broadcast television signal that the utility model embodiment provides comprises: broadcast television transmissions equipment 21 and a plurality of base station 22.
Broadcast television transmissions equipment 21 is used for broadcast television signal is carried out modulation treatment, generates the high frequency carrier that contains this broadcast television signal, and this high frequency carrier is sent to base station 22.
Preferably, referring to Fig. 3, described broadcast television transmissions equipment 21 comprises:
Modulating unit 211 is used for broadcast television signal is carried out modulation treatment, generates the high frequency carrier that contains this broadcast television signal.
Preferably, referring to Fig. 4, described base station 22 comprises:
Wherein, the value in the described path delay of time can set in advance in base station 22, by global positioning system (GPS, global positioning system) records Actual path (as optical fiber) distance between broadcast television transmissions equipment 21 and the base station 22, the transmission time of per 1 km (km) optical fiber is that 5 microseconds (us) are calculated, thereby determine that according to path distance broadcast television signal is transferred to 22 needed time, the i.e. path delays of time of base station from broadcast television transmissions equipment 21.
Described synchronized transmissions time delay, promptly when requiring a plurality of base station synchronization to launch broadcast television signal, broadcast television signal from the broadcast television transmissions device transmission to each base station, and the time delay processing of each base station of process is launched, in this course, broadcast television signal emits by base station from broadcast television transmissions equipment and goes out the needed time.Owing to require each base station synchronization emission broadcast television signal, so claim that this time is the synchronized transmissions time delay.
D/A conversion unit 223 is used to adopt digital-to-analogue conversion (D/A conversion) technology, will be converted to analog signal through the digital signal after the delay process.
For example, referring to Fig. 5, the radio and television baseband signal produces high frequency carrier f0 through modulation, launch this high frequency carrier f0 to the base station 51, base station 52 and base station 53.By transmission time of per 1 km (km) optical fiber is that 5 microseconds (us) are calculated, and 51 fiber lengths is 31km from the optical sender to the base station, and then to be transferred to the path delay of time of base station 51 in this optical fiber be 155us to high frequency carrier f0; 52 fiber lengths is 74.5km from the optical sender to the base station, and be 372.5us the then corresponding path delay of time; 53 fiber lengths is 123.2km from the optical sender to the base station, and be 616us the then corresponding path delay of time.The synchronized transmissions time delay of setting each base station is 5000us, then base station 51 need be with high frequency carrier f0 time-delay 4845us, base station 52 need be with high frequency carrier f0 time-delay 4627.5us, base station 53 need be with high frequency carrier f0 time-delay 4384us, thereby make that the frequency spectrum of the high frequency carrier that contains broadcast television signal that these three base station go out is identical, and emission time delay precise synchronization.
In addition, because in the prior art is in each base station broadcast television signal to be modulated into high frequency carrier, when being modulated into high frequency carrier, experienced a nonlinear process, therefore, each base station is not in full accord through the high frequency carrier frequency spectrum that modulation produces, and when the high frequency carrier that is modulated in each base station drops on a receiving terminal simultaneously, will form homogenous frequency signal and disturb.
And the broadcast television signal among the utility model embodiment is modulated into high frequency carrier by broadcast television transmissions equipment 21, be transferred to each base station through opto-electronic conversion, the high frequency carrier relative error of the frequency that each base station is sent is zero, and further handle and accurately to control each base station synchronization emission broadcast television signal by the digital delay of each base station, thereby reduced the co-channel interference between the broadcast television signal of each base station, and, can reduce the system equipment cost, make debugging simpler.
In sum, the base station that provides of the utility model embodiment comprises AD conversion unit, digital processing element, D/A conversion unit and transmitter unit.Wherein, AD conversion unit converts the high frequency carrier that contains broadcast television signal that broadcast television transmissions equipment sends to digital signal; Digital processing element carries out delay process to described digital signal; D/A conversion unit will be converted to analog signal through the digital signal after the described delay process; Analog signal after transmitter unit will be handled through described D/A conversion unit is transmitted to user terminal, thereby make the broadcast television transmissions device transmission be able to filtering for the noise in the high frequency carrier that contains broadcast television signal of base station, and having avoided prior art that the high frequency carrier that contains broadcast singal is carried out the noise that the time delay adjustment caused adds up, thereby improved the signal launch mass, and make that the adjustable extent of time delay is bigger, precision is higher, and system debug is simple more, convenient.
In addition, broadcast television transmissions equipment among the utility model embodiment comprises modulating unit, be transmitted to each base station after making broadcast television transmissions equipment that broadcast television signal is modulated into high frequency carrier, obtain the modulated high frequency carrier that contains broadcast television signal in each base station, thereby any variation does not take place in the feasible frequency that contains the high frequency carrier of broadcast television signal, the relative error of the frequency of the high frequency carrier that contains broadcast television signal of each base station is zero, its frequency spectrum is identical, avoided each base station separately broadcast television signal to be modulated into the frequency spectrum difference that high frequency carrier causes, when thereby the high frequency carrier that contains broadcast television signal that makes each base station dropped on a user terminal simultaneously, the homogenous frequency signal of generation disturbs reduced to minimum; And because each base station receives the modulated high frequency carrier of same frequency spectrum, therefore, it is very simple that system debug becomes, and equipment cost obviously reduces.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (8)
1, a kind of emitter of broadcast television signal is characterized in that, this device comprises:
AD conversion unit is used for converting the high frequency carrier that contains broadcast television signal that broadcast television transmissions equipment sends to digital signal;
Digital processing element is used for described digital signal is carried out delay process;
D/A conversion unit is used for and will be converted to analog signal through the digital signal after the described delay process;
Transmitter unit is used for the analog signal after handling through described D/A conversion unit is transmitted to user terminal.
2, device according to claim 1, it is characterized in that, described digital processing element, according to described high frequency carrier from described broadcast television transmissions device transmission to path delay of time that described base station produced, and predefined synchronized transmissions time delay, described digital signal is carried out delay process.
3, device according to claim 1 is characterized in that, described transmitter unit carries out being transmitted to user terminal after the processing and amplifying to the analog signal after handling through described D/A conversion unit.
4, a kind of emission system of broadcast television signal is characterized in that, this system comprises: broadcast television transmissions equipment and at least one base station;
Described broadcast television transmissions equipment is used for broadcast television signal is carried out modulation treatment, generates the high frequency carrier that contains this broadcast television signal, and this high frequency carrier is sent to the base station;
Described base station is used for converting described high frequency carrier to digital signal; Described digital signal is carried out delay process; Be transmitted to user terminal after will being converted to analog signal through the digital signal after the described delay process.
5, system according to claim 4 is characterized in that, described base station comprises:
AD conversion unit is used for converting the high frequency carrier that contains broadcast television signal that described broadcast television transmissions equipment sends to digital signal;
Digital processing element is used for described digital signal is carried out delay process;
D/A conversion unit is used for and will be converted to analog signal through the digital signal after the described delay process;
Transmitter unit is used for the analog signal after handling through described D/A conversion unit is transmitted to user terminal.
6, system according to claim 5, it is characterized in that, described digital processing element, according to described high frequency carrier from described broadcast television transmissions device transmission to path delay of time that described base station produced, and predefined synchronized transmissions time delay, described digital signal is carried out delay process.
According to claim 4,5 or 6 described systems, it is characterized in that 7, described broadcast television transmissions equipment comprises:
Modulating unit is used for broadcast television signal is carried out modulation treatment, generates the high frequency carrier that contains this broadcast television signal;
Transmitter unit is used for described high frequency carrier is sent to described base station.
8, system according to claim 7 is characterized in that, described transmitter unit sends to described base station by microwave or light wave with described high frequency carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201233051U CN201328162Y (en) | 2008-10-24 | 2008-10-24 | Broadcast television signal transmission system and device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201233051U CN201328162Y (en) | 2008-10-24 | 2008-10-24 | Broadcast television signal transmission system and device with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201328162Y true CN201328162Y (en) | 2009-10-14 |
Family
ID=41180122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201233051U Expired - Lifetime CN201328162Y (en) | 2008-10-24 | 2008-10-24 | Broadcast television signal transmission system and device with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201328162Y (en) |
-
2008
- 2008-10-24 CN CNU2008201233051U patent/CN201328162Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHUHAI RFST SCIENCE + TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHOU YINGPING Effective date: 20100809 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 461000 XINGHE COMMUNICATIONS, 6/F, COMPLEX OFFICE BUILDING, NO.2, DATONG STREET, XUCHANG CITY, HENAN PROVINCE TO: 519015 ROOM 101-102, UNIT 1, BUILDING 40, NO.113, JIDA BAILIAN ROAD, ZHUHAI CITY, GUANGDONG PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20100809 Address after: 519015 Guangdong Province, Zhuhai City Road No. 113 Jida Bailian building 40 unit 1 room 101-102 Patentee after: Zhuhai Wireless Fengwang Technology Co., Ltd. Address before: 461000, Xinghe communication, building six, 2, Datong Street, Henan, Xuchang Patentee before: Zhou Yingping |
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| ASS | Succession or assignment of patent right |
Owner name: ZHOU YINGPING Free format text: FORMER OWNER: ZHUHAI WIRELESS FENGWANG TECHNOLOGY CO., LTD. Effective date: 20111028 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 519015 ZHUHAI, GUANGDONG PROVINCE TO: 461000 XUCHANG, HENAN PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20111028 Address after: 461000, Xinghe communication, building six, 2, Datong Street, Henan, Xuchang Patentee after: Zhou Yingping Address before: 519015 Guangdong Province, Zhuhai City Road No. 113 Jida Bailian building 40 unit 1 room 101-102 Patentee before: Zhuhai Wireless Fengwang Technology Co., Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: ZHENGZHOU BEES NETS MEDIA CO., LTD. Free format text: FORMER OWNER: ZHOU YINGPING Effective date: 20120625 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120625 Address after: 6, building 461000, CCB building, 2 Datong Street, Henan, Xuchang Patentee after: Zhengzhou bee Net Media Co., Ltd. Address before: 461000, Xinghe communication, building six, 2, Datong Street, Henan, Xuchang Patentee before: Zhou Yingping |
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| ASS | Succession or assignment of patent right |
Owner name: BEIJING ZHONGSHI TONGPIN TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHENGZHOU BEES NETS MEDIA CO., LTD. Effective date: 20150717 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150717 Address after: 100038 Central People's broadcasting station, 2 Fuxing street, Beijing, Xicheng District Patentee after: Beijing same frequency technology Co., Ltd. Address before: 6, building 461000, CCB building, 2 Datong Street, Henan, Xuchang Patentee before: Zhengzhou bee Net Media Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20091014 |
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| CX01 | Expiry of patent term |