CN102142915A - Method and device for building CMMB (China Mobile Multimedia Broadcasting) antenna in handheld terminal - Google Patents
Method and device for building CMMB (China Mobile Multimedia Broadcasting) antenna in handheld terminal Download PDFInfo
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- CN102142915A CN102142915A CN2011100822411A CN201110082241A CN102142915A CN 102142915 A CN102142915 A CN 102142915A CN 2011100822411 A CN2011100822411 A CN 2011100822411A CN 201110082241 A CN201110082241 A CN 201110082241A CN 102142915 A CN102142915 A CN 102142915A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/26—Arrangements for switching distribution systems
Abstract
The invention provides a method and device for building a CMMB (China Mobile Multimedia Broadcasting) antenna in a handheld terminal. The method comprises the steps: a frequency band range of a CMMB applicable wave band is at least divided into a first frequency band and a second frequency band; a first radio frequency signal which is output from a built-in antenna and falls in the first frequency band is transmitted to a CMMB chip through a first radio frequency branch; a second radio frequency signal which is output from the built-in antenna and falls in the second frequency band is transmitted to the CMMB chip through a second radio frequency branch; and the CMMB chip judges signal quality indexes of the first radio frequency signal output from the first radio frequency branch and the second radio frequency signal output from the second radio frequency branch, selects one radio frequency signal with a signal quality index meeting the anticipation from the first radio frequency signal and the second radio frequency signal, and discards the other radio frequency signal.
Description
Technical field
The present invention relates to the method and the device thereof of the built-in CMMB antenna of a kind of terminal, be particularly useful for improving the method and the device thereof of the built-in aerial of handheld terminal CMMB reception.
Background technology
CMMB full name China Mobile Multimedia Broadcasting, that is: China Mobile multimedia broadcasting.CMMB is mainly towards the small screen hand held terminal unit, its end product kind comprises that mainly MP4, mobile phone, GPS, USB receive rod, independent receivers etc., digital broadcast television program, integrated information and urgent broadcast service are provided, realize the seamless collaborative covering that satellite transmits combines with ground network.CMMB adopts the mobile multimedia broadcast television technology with independent intellectual property right, system can run, can safeguard, can manage, possess broadcast type, reversible service function, support the transportation that central and local governments combine, possesses encryption authorization control and management system, support unified standard and unified operation, support the roaming of the user whole nation.
At present the television antenna of CMMB handheld device all adopts external telescopic antenna to realize, yet telescopic antenna is expensive owing to price, not attractive in appearance and many reasons such as external easy damage exist, so built-in CMMB antenna scheme importance constantly promotes.
And because CMMB ground base station U wave band requires band limits 474-798Mhz, so CMMB built-in aerial required size is difficult to satisfy this frequency range requirement, the built-in aerial receiving ability far is weaker than external antenna.Especially CMMB than low-frequency range 474-562Mhz band limits, be the difficult point of Antenna Design, even telescopic antenna also is difficult in the reception index that reaches satisfied in this frequency range always.For head it off also has some schemes to load the LNA circuit module signal that built-in CMMB antenna loses is compensated at present, but such design is very high to antenna self bandwidth requirement, promptly the CMMB antenna size there are certain needs equally, and be difficult to the interference that control comes from mobile phone inside, LNA has also amplified noise signal in amplifying signal, there are some frequencies to exist and flooded possibility, worsened the CMMB receiving ability on the contrary by noise.Still there is not the built-in scheme of mature C MMB antenna up till now on the market.
Summary of the invention
Main purpose of the present invention is to be difficult for the built-in miniaturization of CMMB antenna, receiving sensitivity is low, CMMB plays the search capability difference problem in order to solve existing handheld device, the invention provides a kind of by a built-in aerial is set in handheld device, and connect two or more radio frequency branch road by it, the CMMB chip is selected the signal that the radio frequency branch road receives then, to promote the sensitivity of received signal, reduce the requirement on the CMMB built-in aerial space, improve CMMB handheld device TV receiving effect.
According to an aspect of the present invention, the invention provides the method for the built-in CMMB antenna of a kind of handheld terminal, comprising:
A) band limits of the suitable wave band of CMMB is divided into first frequency range and second frequency range at least;
B) first radiofrequency signal that falls in described first frequency range from built-in aerial output sends the CMMB chip to via the first radio frequency branch road;
C) second radiofrequency signal that falls in described second frequency range from built-in aerial output sends the CMMB chip to via the second radio frequency branch road;
D) described CMMB chip is judged by the quality indication signal to second radiofrequency signal of first radiofrequency signal of described first radio frequency branch road output and the output of the described second radio frequency branch road, select a radiofrequency signal of the satisfied expection of quality indication signal in described first and second radiofrequency signals for use, and abandon another radiofrequency signal.
Wherein, the CMMB chip comprises:
First tuner is used to receive first radiofrequency signal of exporting with the tuning described first radio frequency branch road;
Second tuner is used to receive second radiofrequency signal of exporting with the tuning described second radio frequency branch road;
Switch control module, be used for receiving respectively via described first tuner and tuning first radiofrequency signal and second radiofrequency signal of described second tuner, and after obtaining its quality indication signal, keep its quality indication signal in first and second radiofrequency signals is satisfied the reception of a radiofrequency signal of expection;
The quality indication signal judge module is used for that described first or second radiofrequency signal is carried out quality index successively and judges, and judged result is fed back to described switch control module successively.
Wherein, the quality indication signal judge module is calculated quality indication signal after radiofrequency signal being carried out demodulation, decoding.
In addition, quality indication signal comprises one of power level, signal to noise ratio and ber value or combination.
Wherein, the first radio frequency branch road is a high band radio frequency branch road, comprising:
Two L matching networks, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network outputs;
Wherein, the output of described band pass filter connects in the described CMMB chip input as first tuner of high-frequency tuner.
Wherein, the second radio frequency branch road is a low-frequency range radio frequency branch road, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
The LNA circuit, its input connects the output of described first pair of L matching network;
Second pair of L matching network, its input connects the output of described LNA circuit;
Band pass filter, its input connects the output of described second pair of L matching network;
Wherein, the output of described band pass filter connects in the described CMMB chip input as second tuner of low frequency tuner.
According to a further aspect in the invention, the present invention also provides the device of the built-in CMMB antenna of a kind of handheld terminal, comprises built-in aerial and CMMB chip, also comprises:
The first radio frequency branch road is used for first radiofrequency signal that falls in suitable wave band first frequency range of CMMB of built-in aerial output is sent to the CMMB chip;
The second radio frequency branch road is used for second radiofrequency signal that falls in suitable wave band second frequency range of CMMB of built-in aerial output is sent to the CMMB chip;
Wherein, described CMMB chip is judged by the quality indication signal to second radiofrequency signal of first radiofrequency signal of described first radio frequency branch road output and the output of the described second radio frequency branch road, select a radiofrequency signal of the satisfied expection of quality indication signal in described first and second radiofrequency signals for use, and abandon another radiofrequency signal.
In addition, the CMMB chip comprises:
First tuner is used to receive first radiofrequency signal of exporting with the tuning described first radio frequency branch road;
Second tuner is used to receive second radiofrequency signal of exporting with the tuning described second radio frequency branch road;
Switch control module, be used for receiving respectively via described first tuner and tuning first radiofrequency signal and second radiofrequency signal of described second tuner, and after obtaining its quality indication signal, keep its quality indication signal in first and second radiofrequency signals is satisfied the reception of a radiofrequency signal of expection;
The quality indication signal judge module is used for that described first or second radiofrequency signal is carried out quality index successively and judges, and judged result is fed back to described switch control module successively.
Wherein, the first radio frequency branch road is a high band radio frequency branch road, comprising:
Two L matching networks, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network outputs;
Wherein, the output of described band pass filter connects in the described CMMB chip input as first tuner of high-frequency tuner.
Wherein, the second radio frequency branch road is a low-frequency range radio frequency branch road, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
The LNA circuit, its input connects the output of described first pair of L matching network;
Second pair of L matching network, its input connects the output of described LNA circuit;
Band pass filter, its input connects the output of described second pair of L matching network;
Wherein, the output of described band pass filter connects in the described CMMB chip input as second tuner of low frequency tuner.
Compared with prior art, beneficial effect of the present invention is:
1) earlier the band limits of CMMB wave band is divided, the signal of different-waveband is by different radio frequency branch road transmission, and judge by its chip, the radio frequency branch road transmission signals that selection meets the demands, thereby make the miniaturization more of CMMB antenna, remedy the CMMB antenna because working frequency range causes the problem of built-in aerial space requirement harshness, solved handheld terminal and used telescopic antenna to receive CMMB TV signal problem always, made things convenient for the flexible Application of mobile phone and Miniature Terminal.
2) by radio frequency branch road received signal, guaranteed that CMMB receives the more weak problem of low frequency signal all the time to different frequency range.And, in the research and development debug process, simplify the signal processing better effects if more at different frequency range characteristics separate processes.
3) radio-frequency head of CMMB chip is provided with the tuner that receives different frequency range radio frequency branch road, after the tuning processing of difference, its signal carries out quality index again and judges, then judged result is fed back to the switch control module of control radio frequency branch road, after the chip simple upgrade scheme, just can realize above-mentioned functions, satisfy and the receptivity that guarantees the CMMB full frequency band, this scheme realizes simple, is easy to promote.
Description of drawings
Fig. 1 is the method flow diagram of the built-in CMMB antenna of handheld terminal of the present invention;
Fig. 2 is a CMMB chip internal structure block diagram among the present invention;
Fig. 3 is that medium-high frequency section radio frequency branch road of the present invention connects block diagram;
Fig. 4 is that medium and low frequency section radio frequency branch road of the present invention connects block diagram;
Fig. 5 is that the present invention totally connects block diagram;
Fig. 6 is a workflow block diagram of the present invention.
Embodiment
, should be appreciated that following illustrated preferred embodiment only is used for description and interpretation the present invention, and be not used in qualification the present invention a preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing.
The invention provides the method for the built-in CMMB antenna of a kind of handheld terminal, its flow chart comprises as shown in Figure 1:
S11) band limits of the suitable wave band of CMMB is divided into first frequency range and second frequency range at least;
S12) first radiofrequency signal that falls in described first frequency range from built-in aerial output sends the CMMB chip to via the first radio frequency branch road;
S13) second radiofrequency signal that falls in described second frequency range from built-in aerial output sends the CMMB chip to via the second radio frequency branch road;
S14) described CMMB chip is judged by the quality indication signal to second radiofrequency signal of first radiofrequency signal of described first radio frequency branch road output and the output of the described second radio frequency branch road, select a radiofrequency signal of the satisfied expection of quality indication signal in described first and second radiofrequency signals for use, and abandon another radiofrequency signal.
Wherein, the division of CMMB wave band generally requires band limits 474-798Mhz requirement according to CMMB ground base station U wave band, selection is divided into two wave bands, and according to two band setting radio frequency branch roads, one the tunnel according to 562-798Mhz frequency range requirement design radio frequency branch road, and one the tunnel according to 474-562Mhz frequency range requirement design radio frequency branch road; Also can be designed to three or three above radio frequency branch roads according to the specification requirement of handheld terminal, it is basic identical with high band radio frequency branch road or low-frequency range radio frequency branch road among the present invention that it is provided with structure, do not repeat them here.
As shown in Figure 2, be CMMB chip internal structure block diagram among the present invention, comprise:
First tuner is used to receive first radiofrequency signal of exporting with the tuning described first radio frequency branch road;
Second tuner is used to receive second radiofrequency signal of exporting with the tuning described second radio frequency branch road;
Switch control module, be used for receiving respectively via described first tuner and tuning first radiofrequency signal and second radiofrequency signal of described second tuner, and after obtaining its quality indication signal, keep its quality indication signal in first and second radiofrequency signals is satisfied the reception of a radiofrequency signal of expection;
The quality indication signal judge module is used for that described first or second radiofrequency signal is carried out quality index successively and judges, and judged result is fed back to described switch control module successively, and it mainly comprises demodulator and host CPU.
Wherein, as shown in Figure 2, after radiofrequency signal enters the CMMB chip, at first enter first tuner and second tuner, after this amplifies through inner LNA, mixing, DC correction, low-pass filtering and gain, give demodulator.Demodulator is a demodulation chip, and it receives the zero intermediate frequency signals of self-tuner, and after channel demodulation and forward error correction, the TS stream that forms reference format is given host CPU decoding reduction.The built-in programmable DSP hardware system of demodulator has multiple interfaces function (USB, SDIO, SPI and BUS bus), and built-in MPE-FEC internal memory.Demodulator is by the control of I2C bus realization to tuner.Demodulator processes is come the differential signal of the similar IQ of self-tuner, reconciling into standard TS stream gives host CPU decoding reduction and reads the power level value that hope obtains, the SNR snr value, the BER ber value, host CPU feeds back to switch control module and judges behind the read value, whether satisfy expection, as unmet demand, the switch control module may command is closed this radio-frequency line and is enabled other one, as meets the demands, radio-frequency line is constant so, and system works on.
As shown in Figure 3, be that the first radio frequency branch road connects block diagram, it is high band radio frequency branch road syndeton block diagram, antenna output end connects two L matching network inputs, two L matching networks are used for debugging passive standing wave in the high band range, satisfy index request, two L matching network output connecting band bandpass filters, this filter band leads to scope 470-798MHz, and high-quality-factor is arranged.CMMB process chip rf inputs is directly received in the output of filter, and signal is transferred to first tuner.
As shown in Figure 4, be that the second radio frequency branch road connects block diagram, be that low-frequency range radio frequency branch road connects block diagram, antenna output end connects first pair of L matching network input, first pair of L matching network output connects the LNA circuit input end, select the LNA circuit that adapts to band limits herein for use, described low noise amplifier (LNA) is a high performance device, its noise factor directly is added on the noise factor of system, the performance of low noise amplifier is particularly important, for reducing the noise figure of system, selected low noise amplifier can provide bigger gain in the 474-562Mhz frequency, has less noise figure simultaneously less than 1dB, the low noise amplifier full frequency band provides 10dB gain, the LNA circuit output end connects second pair of L matching network, and this frequency band range requirement is satisfied in network whole debugging in front and back.Second pair of L matching network output connecting band bandpass filter, the band pass filter band leads to scope 470-798MHz, and high-quality-factor is arranged.CMMB process chip classification receiving terminal is directly received in the output of filter, and signal is transferred to second tuner.
Wherein Fig. 5 is overall framework figure of the present invention, is connected the shared antenna of two-way radio-frequency line by the two-way radio-frequency line between antenna and the CMMB chip.Article one, radio-frequency line such as Fig. 3, radiofrequency signal directly enters chip by the radio-frequency receiving tube pin of CMMB chip.Second radio-frequency line such as Fig. 4, radiofrequency signal directly enters chip by the classification reception pin of CMMB chip.
Fig. 6 is a workflow diagram of the present invention.The CMMB built-in aerial connects two-way radio frequency branch road respectively, but has only one the tunnel to keep connected state all the time by the control switch module decision of CMMB chip internal.After wherein one road signal enters the demodulator of CMMB chip internal, after radiofrequency signal process channel demodulation and the forward error correction, the TS stream that forms reference format is given host CPU decoding reduction, host CPU reads analog value by the decoding reduction, as the power level value, snr value, ber value, and contrast with quality indication signal, as meet the demands, this radio frequency path works on so, as backlog demand, prove and select radio frequency path not satisfy CMMB frequency range requirement in the space at present, thereby then host CPU feeds back to the other radio frequency branch road of switch control module instruction switching selection.
In addition if increase the city selective listing in the exploitation of CMMB upper layer software (applications), CMMB user can initiatively select present city according to city, place frequency range, the user can select the city, place by the CMMB software interface, the corresponding different frequent points of different cities, at this moment host CPU can read user data, and feed back corresponding information and give switch control module, thereby finish the selection of radio frequency path.
This scheme has certain dominance, to the CMMB different frequency range at processing, efficiently solve the built-in aft antenna bandwidth of CMMB antenna deficiency, the problem of low frequency index error.And the design of convenient simplification research and development and the debugging in later stage.
The present invention also provides the device of the built-in CMMB antenna of a kind of handheld terminal, comprise built-in aerial and CMMB chip, also comprise: the first radio frequency branch road is used for first radiofrequency signal that falls in suitable wave band first frequency range of CMMB of built-in aerial output is sent to the CMMB chip; The second radio frequency branch road is used for second radiofrequency signal that falls in suitable wave band second frequency range of CMMB of built-in aerial output is sent to the CMMB chip; Wherein, described CMMB chip is judged by the quality indication signal to second radiofrequency signal of first radiofrequency signal of described first radio frequency branch road output and the output of the described second radio frequency branch road, select a radiofrequency signal of the satisfied expection of quality indication signal in described first and second radiofrequency signals for use, and abandon another radiofrequency signal.
Wherein, as shown in Figure 2, the CMMB chip comprises:
First tuner is used to receive first radiofrequency signal of exporting with the tuning described first radio frequency branch road;
Second tuner is used to receive second radiofrequency signal of exporting with the tuning described second radio frequency branch road;
Switch control module, be used for receiving respectively via described first tuner and tuning first radiofrequency signal and second radiofrequency signal of described second tuner, and after obtaining its quality indication signal, keep its quality indication signal in first and second radiofrequency signals is satisfied the reception of a radiofrequency signal of expection;
The quality indication signal judge module is used for that described first or second radiofrequency signal is carried out quality index successively and judges, and judged result is fed back to described switch control module successively.
Wherein, the first radio frequency branch road is a high band radio frequency branch road, as shown in Figure 3, comprising:
Two L matching networks, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network outputs;
Wherein, the output of described band pass filter connects in the described CMMB chip input as first tuner of high-frequency tuner.
Wherein, the second radio frequency branch road is a low-frequency range radio frequency branch road, as shown in Figure 4, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
The LNA circuit, its input connects the output of described first pair of L matching network;
Second pair of L matching network, its input connects the output of described LNA circuit;
Band pass filter, its input connects the output of described second pair of L matching network;
Wherein, the output of described band pass filter connects in the described CMMB chip input as second tuner of low frequency tuner.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. the method for the built-in CMMB antenna of handheld terminal is characterized in that, comprising:
A) band limits of the suitable wave band of CMMB is divided into first frequency range and second frequency range at least;
B) first radiofrequency signal that falls in described first frequency range from built-in aerial output sends the CMMB chip to via the first radio frequency branch road;
C) second radiofrequency signal that falls in described second frequency range from built-in aerial output sends the CMMB chip to via the second radio frequency branch road;
D) described CMMB chip is judged by the quality indication signal to second radiofrequency signal of first radiofrequency signal of described first radio frequency branch road output and the output of the described second radio frequency branch road, select a radiofrequency signal of the satisfied expection of quality indication signal in described first and second radiofrequency signals for use, and abandon another radiofrequency signal.
2. method according to claim 1 is characterized in that, described CMMB chip comprises:
First tuner is used to receive first radiofrequency signal of exporting with the tuning described first radio frequency branch road;
Second tuner is used to receive second radiofrequency signal of exporting with the tuning described second radio frequency branch road;
Switch control module, be used for receiving respectively via described first tuner and tuning first radiofrequency signal and second radiofrequency signal of described second tuner, and after obtaining its quality indication signal, keep its quality indication signal in first and second radiofrequency signals is satisfied the reception of a radiofrequency signal of expection;
The quality indication signal judge module is used for that described first or second radiofrequency signal is carried out quality index successively and judges, and judged result is fed back to described switch control module successively.
3. method according to claim 2 is characterized in that, described quality indication signal judge module is calculated quality indication signal after radiofrequency signal being carried out demodulation, decoding.
4. method according to claim 1 and 2 is characterized in that, described quality indication signal comprises one of power level, signal to noise ratio and ber value or combination.
5. method according to claim 2 is characterized in that, the described first radio frequency branch road is a high band radio frequency branch road, comprising:
Two L matching networks, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network outputs;
Wherein, the output of described band pass filter connects in the described CMMB chip input as first tuner of high-frequency tuner.
6. method according to claim 5 is characterized in that, the described second radio frequency branch road is a low-frequency range radio frequency branch road, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
The LNA circuit, its input connects the output of described first pair of L matching network;
Second pair of L matching network, its input connects the output of described LNA circuit;
Band pass filter, its input connects the output of described second pair of L matching network;
Wherein, the output of described band pass filter connects in the described CMMB chip input as second tuner of low frequency tuner.
7. the device of the built-in CMMB antenna of handheld terminal comprises built-in aerial and CMMB chip, it is characterized in that also comprising:
The first radio frequency branch road is used for first radiofrequency signal that falls in suitable wave band first frequency range of CMMB of built-in aerial output is sent to the CMMB chip;
The second radio frequency branch road is used for second radiofrequency signal that falls in suitable wave band second frequency range of CMMB of built-in aerial output is sent to the CMMB chip;
Wherein, described CMMB chip is judged by the quality indication signal to second radiofrequency signal of first radiofrequency signal of described first radio frequency branch road output and the output of the described second radio frequency branch road, select a radiofrequency signal of the satisfied expection of quality indication signal in described first and second radiofrequency signals for use, and abandon another radiofrequency signal.
8. device according to claim 7 is characterized in that, described CMMB chip comprises:
First tuner is used to receive first radiofrequency signal of exporting with the tuning described first radio frequency branch road;
Second tuner is used to receive second radiofrequency signal of exporting with the tuning described second radio frequency branch road;
Switch control module, be used for receiving respectively via described first tuner and tuning first radiofrequency signal and second radiofrequency signal of described second tuner, and after obtaining its quality indication signal, keep its quality indication signal in first and second radiofrequency signals is satisfied the reception of a radiofrequency signal of expection;
The quality indication signal judge module is used for that described first or second radiofrequency signal is carried out quality index successively and judges, and judged result is fed back to described switch control module successively.
9. according to claim 7 or 8 described devices, it is characterized in that the described first radio frequency branch road is a high band radio frequency branch road, comprising:
Two L matching networks, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network outputs;
Wherein, the output of described band pass filter connects in the described CMMB chip input as first tuner of high-frequency tuner.
10. according to claim 7 or 8 described methods, it is characterized in that the described second radio frequency branch road is a low-frequency range radio frequency branch road, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
The LNA circuit, its input connects the output of described first pair of L matching network;
Second pair of L matching network, its input connects the output of described LNA circuit;
Band pass filter, its input connects the output of described second pair of L matching network;
Wherein, the output of described band pass filter connects in the described CMMB chip input as second tuner of low frequency tuner.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110082241.1A CN102142915B (en) | 2011-04-01 | 2011-04-01 | Method and device for building CMMB (China Mobile Multimedia Broadcasting) antenna in handheld terminal |
| PCT/CN2011/076113 WO2012129855A1 (en) | 2011-04-01 | 2011-06-22 | Method for internal cmmb antenna of hand-held terminal and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110082241.1A CN102142915B (en) | 2011-04-01 | 2011-04-01 | Method and device for building CMMB (China Mobile Multimedia Broadcasting) antenna in handheld terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102142915A true CN102142915A (en) | 2011-08-03 |
| CN102142915B CN102142915B (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110082241.1A Expired - Fee Related CN102142915B (en) | 2011-04-01 | 2011-04-01 | Method and device for building CMMB (China Mobile Multimedia Broadcasting) antenna in handheld terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102142915B (en) |
| WO (1) | WO2012129855A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102769795A (en) * | 2012-07-11 | 2012-11-07 | 深圳乐投卡尔科技有限公司 | Onboard Android platform and China mobile multimedia broadcasting (CMMB) playing method thereof |
| CN102780499A (en) * | 2012-06-26 | 2012-11-14 | 国民技术股份有限公司 | Antenna sharing circuit, radio-frequency circuit and terminal device |
| CN103167335A (en) * | 2011-12-15 | 2013-06-19 | 英顺源（上海）科技有限公司 | System and method for television signal playing for mobile device |
| CN103209003A (en) * | 2012-01-17 | 2013-07-17 | 国民技术股份有限公司 | Antenna sharing circuit, radio frequency circuit and mobile terminal |
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| JP2001251229A (en) * | 2000-03-07 | 2001-09-14 | Clarion Co Ltd | Broadcast receiver for mobile body |
| JP2009021900A (en) * | 2007-07-13 | 2009-01-29 | Panasonic Corp | Simultaneous broadcast receiver |
| JP4641044B2 (en) * | 2009-01-09 | 2011-03-02 | クラリオン株式会社 | Digital broadcast receiving method |
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- 2011-04-01 CN CN201110082241.1A patent/CN102142915B/en not_active Expired - Fee Related
- 2011-06-22 WO PCT/CN2011/076113 patent/WO2012129855A1/en active Application Filing
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| CN1998220A (en) * | 2004-04-15 | 2007-07-11 | 高通弗拉里奥恩技术公司 | Methods and apparatus for selecting between multiple carriers using a receiver with multiple receiver chains |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103167335A (en) * | 2011-12-15 | 2013-06-19 | 英顺源（上海）科技有限公司 | System and method for television signal playing for mobile device |
| CN103209003A (en) * | 2012-01-17 | 2013-07-17 | 国民技术股份有限公司 | Antenna sharing circuit, radio frequency circuit and mobile terminal |
| CN102780499A (en) * | 2012-06-26 | 2012-11-14 | 国民技术股份有限公司 | Antenna sharing circuit, radio-frequency circuit and terminal device |
| CN102769795A (en) * | 2012-07-11 | 2012-11-07 | 深圳乐投卡尔科技有限公司 | Onboard Android platform and China mobile multimedia broadcasting (CMMB) playing method thereof |
| CN102769795B (en) * | 2012-07-11 | 2015-01-28 | 深圳乐投卡尔科技有限公司 | Onboard Android platform and china mobile multimedia broadcasting (CMMB) playing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102142915B (en) | 2015-01-28 |
| WO2012129855A1 (en) | 2012-10-04 |
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