CN102142915B - 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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- CN102142915B CN102142915B CN201110082241.1A CN201110082241A CN102142915B CN 102142915 B CN102142915 B CN 102142915B CN 201110082241 A CN201110082241 A CN 201110082241A CN 102142915 B CN102142915 B CN 102142915B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/26—Arrangements for switching distribution systems
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- Circuits Of Receivers In General (AREA)
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 a kind of method and device thereof of terminal built-in CMMB antenna, be particularly useful for method and the device thereof of the built-in aerial improving 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 mainly comprises MP4, mobile phone, GPS, USB dongle, independent receivers etc., digital broadcast television program, integrated information and urgent broadcast service are provided, realize the seamless collaborative covering that satellite transmission combines with ground network.CMMB adopts the mobile multimedia broadcast television technology with independent intellectual property right, system renewable electricity, can safeguard, ALARA Principle, 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.
The television antenna of current CMMB handheld device all adopts external telescopic antenna to realize, however telescopic antenna due to price, unsightly and many reason such as external easy damage exist, therefore 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 meet this band requirement, built-in aerial receiving ability is far weaker than external antenna.Especially the comparatively low-frequency range 474-562Mhz band limits of CMMB, is the difficult point of Antenna Design always, even telescopic antenna is also difficult to reach satisfied reception index in this frequency range.In order to head it off also has some schemes to be loaded with LNA circuit module, the signal that built-in CMMB antenna is lost is compensated at present, but such design requires very high to antenna own bandwidth, namely certain needs are had equally to CMMB antenna size, and be difficult to the interference controlling to come from interior of mobile phone, LNA is also exaggerated noise signal while amplifying signal, there are some frequencies to exist and flooded possibility by noise, be degrading CMMB receiving ability on the contrary.Up till now market still there is no the ripe built-in scheme of CMMB antenna.
Summary of the invention
Main purpose of the present invention is the problem that the not easily built-in miniaturization of CMMB antenna of existing handheld device, receiving sensitivity are low, CMMB plays search capability difference in order to solve, the invention provides a kind of by arranging a built-in aerial in handheld device, and two or more radio frequency branch road is connected by it, then the signal that CMMB chip radio frequency branch road receives is selected, to promote the sensitivity of Received signal strength, reduce the requirement spatially of CMMB built-in aerial, 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 that CMMB is suitable for wave band is at least divided into the first frequency range and the second frequency range;
B) the first radiofrequency signal fallen in described first frequency range exported from built-in aerial sends CMMB chip to via the first radio frequency branch road;
C) the second radiofrequency signal fallen in described second frequency range exported from built-in aerial sends CMMB chip to via the second radio frequency branch road;
D) described CMMB chip is judged by the quality indication signal of the second radiofrequency signal exported the first radiofrequency signal and the described second radio frequency branch road of described first radio frequency branch road output, select quality indication signal in described first and second radiofrequency signals to meet a radiofrequency signal of expection, and abandon another radiofrequency signal.
Wherein, CMMB chip comprises:
First tuner, for receiving the first radiofrequency signal exported with tuning described first radio frequency branch road;
Second tune device, for receiving the second radiofrequency signal exported with tuning described second radio frequency branch road;
Switch control module, for receiving via described first tuner and tuning the first radiofrequency signal of described second tune device and the second radiofrequency signal respectively, and after obtaining its quality indication signal, keep the reception of the radiofrequency signal its quality indication signal in the first and second radiofrequency signals being met to expection;
Quality indication signal judge module, for carrying out quality index judgement successively to the described first or second radiofrequency signal, and feeds back to described switch control module successively by judged result.
Wherein, quality indication signal judge module, after radio frequency signal carries out demodulation, decoding, calculates quality indication signal.
In addition, quality indication signal comprises power level, one of signal to noise ratio and ber value or combination.
Wherein, the first radio frequency branch road is high band radio frequency branch road, comprising:
Two L matching network, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network output;
Wherein, the output of described band pass filter connects the input as the first tuner of high-frequency tuner in described CMMB chip.
Wherein, the second radio frequency branch road is low-frequency range radio frequency branch road, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
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 the input as the second tune device of low conversion tuner in described CMMB chip.
According to a further aspect in the invention, present invention also offers the device of the built-in CMMB antenna of a kind of handheld terminal, comprise built-in aerial and CMMB chip, also comprise:
First radio frequency branch road, sends CMMB chip to for the first radiofrequency signal that CMMB is suitable in wave band first frequency range that falls into that built-in aerial is exported;
Second radio frequency branch road, sends CMMB chip to for the second radiofrequency signal that CMMB is suitable in wave band second frequency range that falls into that built-in aerial is exported;
Wherein, described CMMB chip is judged by the quality indication signal of the second radiofrequency signal exported the first radiofrequency signal and the described second radio frequency branch road of described first radio frequency branch road output, select quality indication signal in described first and second radiofrequency signals to meet a radiofrequency signal of expection, and abandon another radiofrequency signal.
In addition, CMMB chip comprises:
First tuner, for receiving the first radiofrequency signal exported with tuning described first radio frequency branch road;
Second tune device, for receiving the second radiofrequency signal exported with tuning described second radio frequency branch road;
Switch control module, for receiving via described first tuner and tuning the first radiofrequency signal of described second tune device and the second radiofrequency signal respectively, and after obtaining its quality indication signal, keep the reception of the radiofrequency signal its quality indication signal in the first and second radiofrequency signals being met to expection;
Quality indication signal judge module, for carrying out quality index judgement successively to the described first or second radiofrequency signal, and feeds back to described switch control module successively by judged result.
Wherein, the first radio frequency branch road is high band radio frequency branch road, comprising:
Two L matching network, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network output;
Wherein, the output of described band pass filter connects the input as the first tuner of high-frequency tuner in described CMMB chip.
Wherein, the second radio frequency branch road is low-frequency range radio frequency branch road, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
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 the input as the second tune device of low conversion tuner in described CMMB chip.
Compared with prior art, beneficial effect of the present invention is:
1) first the band limits of CMMB wave band is divided, the signal of different-waveband is by the transmission of different radio frequency branch roads, and judged by its chip, select the radio frequency branch road signal transmission met the demands, thus make CMMB antenna more miniaturized, compensate for CMMB antenna and cause the problem of built-in aerial space requirement harshness due to working frequency range, solve handheld terminal and use telescopic antenna to receive CMMB TV signal problem always, facilitate the flexible Application of mobile phone and Miniature Terminal.
2) by the radio frequency branch road Received signal strength to different frequency range, ensure that CMMB receives the more weak problem of low frequency signal all the time.And for the separately process of different frequency range feature, more simplify in research and development debug process, signal transacting better effects if.
3) radio-frequency head of CMMB chip is provided with the tuner receiving different frequency range radio frequency branch road, after the tuning process of difference, its signal carries out quality index judgement again, then judged result is fed back to the switch control module controlling radio frequency branch road, after chip simple upgrade scheme, just can realize above-mentioned functions, meet and the receptivity ensureing CMMB full frequency band, the program realizes simple, is easy to promote.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the built-in CMMB antenna of handheld terminal of the present invention;
Fig. 2 is CMMB chip internal structure block diagram in 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 workflow block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment is only for instruction and explanation of the present invention, is not intended to limit the present invention.
The invention provides the method for the built-in CMMB antenna of a kind of handheld terminal, its flow chart as shown in Figure 1, comprising:
S11) band limits that CMMB is suitable for wave band is at least divided into the first frequency range and the second frequency range;
S12) the first radiofrequency signal fallen in described first frequency range exported from built-in aerial sends CMMB chip to via the first radio frequency branch road;
S13) the second radiofrequency signal fallen in described second frequency range exported from built-in aerial sends CMMB chip to via the second radio frequency branch road;
S14) described CMMB chip is judged by the quality indication signal of the second radiofrequency signal exported the first radiofrequency signal and the described second radio frequency branch road of described first radio frequency branch road output, select quality indication signal in described first and second radiofrequency signals to meet a radiofrequency signal of expection, 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 tunnel is according to 562-798Mhz band requirement design radio frequency branch road, and a road is according to 474-562Mhz band requirement design radio frequency branch road; Also can be designed to more than three or three radio frequency branch roads according to the technical requirement of handheld terminal, its arrange structure with the high band radio frequency branch road in the present invention or low-frequency range radio frequency branch road substantially identical, do not repeat them here.
As shown in Figure 2, be CMMB chip internal structure block diagram in the present invention, comprise:
First tuner, for receiving the first radiofrequency signal exported with tuning described first radio frequency branch road;
Second tune device, for receiving the second radiofrequency signal exported with tuning described second radio frequency branch road;
Switch control module, for receiving via described first tuner and tuning the first radiofrequency signal of described second tune device and the second radiofrequency signal respectively, and after obtaining its quality indication signal, keep the reception of the radiofrequency signal its quality indication signal in the first and second radiofrequency signals being met to expection;
Quality indication signal judge module, for carrying out quality index judgement successively to the described first or second radiofrequency signal, and judged result is fed back to described switch control module successively, it mainly comprises demodulator and host CPU.
Wherein, as shown in Figure 2, after radiofrequency signal enters CMMB chip, first enter the first tuner and second tune device, after inner LNA, mixing, DC correction, low-pass filtering and gain are amplified, give demodulator at this.Demodulator is demodulation chip, and it receives the zero intermediate frequency signals of self-tuner, and after channel demodulation and forward error correction, the TS stream forming reference format gives host CPU decoded back.The DSP hardware system of demodulator built-in programmable, has multiple interfaces function (USB, SDIO, SPI and BUS bus), and built-in MPE-FEC internal memory.Demodulator realizes the control to tuner by I2C bus.Demodulator processes carrys out the differential signal of the similar IQ of self-tuner, reconcile into standard TS stream give host CPU decoded back and read the power intensity values wishing to obtain, SNR snr value, BER ber value, after read value, host CPU feeds back to switch control module and judges, whether meet expection, as unmet demand, switch control module can control close this radio-frequency line and enable other one, as met the demands, so radio-frequency line is constant, and system works on.
As shown in Figure 3, be that the first radio frequency branch road connects block diagram, i.e. high band radio frequency bypass connection block diagram, antenna output end connects two L matching network input, two L matching network is used for debugging passive standing wave in high band range, meets index request, two L matching network output connecting band bandpass filter, this filter band leads to scope 470-798MHz, has high-quality-factor.CMMB process chip rf inputs is directly received in the output of filter, and gives the first tuner by Signal transmissions.
As shown in Figure 4, be that the second radio frequency branch road connects block diagram, namely 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 LNA circuit input end, select the LNA circuit adapting to band limits herein, described low noise amplifier (LNA) is high performance device, its noise factor is directly 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 larger gain in 474-562Mhz frequency, there is less noise figure simultaneously and be less than 1dB, low noise amplifier full frequency band provides 10dB gain, LNA circuit output end connects second pair of L matching network, front and back overall network debugging, meet this frequency band range requirement.Second pair of L matching network output connecting band bandpass filter, band pass filter band leads to scope 470-798MHz, has high-quality-factor.CMMB process chip classification receiving terminal is directly received in the output of filter, and by Signal transmissions to second tune device.
Wherein Fig. 5 is overall framework figure of the present invention, is connected between antenna with CMMB chip by two-way radio-frequency line, and two-way radio-frequency line shares an antenna.Article 1, radio-frequency line is as Fig. 3, and radiofrequency signal directly enters chip by the radio frequency reception pin of CMMB chip.Article 2 radio-frequency line is as Fig. 4, and radiofrequency signal directly receives pin by the classification of CMMB chip and enters chip.
Fig. 6 is workflow diagram of the present invention.CMMB built-in aerial connects two-way radio frequency branch road respectively, but determines to only have a road to keep connected state all the time by the control switch module of CMMB chip internal.After wherein a road signal enters the demodulator of CMMB chip internal, radiofrequency signal is after channel demodulation and forward error correction, the TS stream forming reference format gives host CPU decoded back, host CPU reads analog value by decoded back, as power intensity values, snr value, ber value, and contrast with quality indication signal, as met the demands, so this radio frequency path works on, as backlog demand, prove to select at present radio frequency path not CMMB band requirement in meeting spatial, then host CPU feeds back to switch control module instruction thus switches and selects an other radio frequency branch road.
If increase city selective listing in the exploitation of CMMB upper layer software (applications) in addition, CMMB user can initiatively select current city according to city, place frequency range, user can select city, place by CMMB software interface, the corresponding different frequent points in different cities, at this moment host CPU can read user data, and feed back corresponding information to switch control module, thus complete the selection of radio frequency path.
This scheme has some superiority, to CMMB different frequency range for process, efficiently solve the built-in aft antenna bandwidth of CMMB antenna not enough, the problem of low frequency index error.And convenient design and the debugging in later stage simplifying research and development.
Present invention also offers 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, send CMMB chip to for the first radiofrequency signal that CMMB is suitable in wave band first frequency range that falls into that built-in aerial is exported; Second radio frequency branch road, sends CMMB chip to for the second radiofrequency signal that CMMB is suitable in wave band second frequency range that falls into that built-in aerial is exported; Wherein, described CMMB chip is judged by the quality indication signal of the second radiofrequency signal exported the first radiofrequency signal and the described second radio frequency branch road of described first radio frequency branch road output, select quality indication signal in described first and second radiofrequency signals to meet a radiofrequency signal of expection, and abandon another radiofrequency signal.
Wherein, as shown in Figure 2, CMMB chip comprises:
First tuner, for receiving the first radiofrequency signal exported with tuning described first radio frequency branch road;
Second tune device, for receiving the second radiofrequency signal exported with tuning described second radio frequency branch road;
Switch control module, for receiving via described first tuner and tuning the first radiofrequency signal of described second tune device and the second radiofrequency signal respectively, and after obtaining its quality indication signal, keep the reception of the radiofrequency signal its quality indication signal in the first and second radiofrequency signals being met to expection;
Quality indication signal judge module, for carrying out quality index judgement successively to the described first or second radiofrequency signal, and feeds back to described switch control module successively by judged result.
Wherein, the first radio frequency branch road is high band radio frequency branch road, as shown in Figure 3, comprising:
Two L matching network, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network output;
Wherein, the output of described band pass filter connects the input as the first tuner of high-frequency tuner in described CMMB chip.
Wherein, the second radio frequency branch road is 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;
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 the input as the second tune device of low conversion tuner in described CMMB chip.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a method for the built-in CMMB antenna of handheld terminal, is characterized in that, comprising:
A) band limits that CMMB is suitable for wave band is at least divided into the first frequency range and the second frequency range;
What B) export from built-in aerial falls into the first radiofrequency signal in described first frequency range to send CMMB chip to the first tuner via the first radio frequency branch road;
What C) export from built-in aerial falls into the second radiofrequency signal in described second frequency range to send CMMB chip to second tune device via the second radio frequency branch road;
D) described CMMB chip is judged by the quality indication signal of the second radiofrequency signal exported the first radiofrequency signal and the described second radio frequency branch road of described first radio frequency branch road output, quality indication signal in described first and second radiofrequency signals is selected to meet a radiofrequency signal of expection, and abandon another radiofrequency signal, to improve handheld terminal TV receiving effect;
Wherein, described CMMB is China Mobile multimedia broadcasting.
2. method according to claim 1, is characterized in that, described CMMB chip comprises:
First tuner, for receiving the first radiofrequency signal exported with tuning described first radio frequency branch road;
Second tune device, for receiving the second radiofrequency signal exported with tuning described second radio frequency branch road;
Switch control module, for receiving via described first tuner and tuning the first radiofrequency signal of described second tune device and the second radiofrequency signal respectively, and after obtaining its quality indication signal, keep the reception of the radiofrequency signal its quality indication signal in the first and second radiofrequency signals being met to expection;
Quality indication signal judge module, for carrying out quality index judgement successively to the described first or second radiofrequency signal, and feeds back to described switch control module successively by judged result.
3. method according to claim 2, is characterized in that, described quality indication signal judge module, after radio frequency signal carries out demodulation, decoding, calculates quality indication signal.
4. method according to claim 1 and 2, is characterized in that, described quality indication signal comprises power level, one of signal to noise ratio and ber value or combination.
5. method according to claim 2, is characterized in that, described first radio frequency branch road is high band radio frequency branch road, comprising:
Two L matching network, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network output;
Wherein, the output of described band pass filter connects the input as the first tuner of high-frequency tuner in described CMMB chip.
6. method according to claim 5, is characterized in that, described second radio frequency branch road is low-frequency range radio frequency branch road, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
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 the input as the second tune device of low conversion tuner in described CMMB chip.
7. a device for the built-in CMMB antenna of handheld terminal, comprises built-in aerial and CMMB chip, and the band limits being suitable for wave band of described CMMB is divided into the first frequency range and the second frequency range, characterized by further comprising:
First radio frequency branch road, falls into for what built-in aerial was exported the first tuner that CMMB the first radiofrequency signal be suitable in wave band first frequency range sends CMMB chip to;
Second radio frequency branch road, falls into for what built-in aerial was exported the second tune device that CMMB the second radiofrequency signal be suitable in wave band second frequency range sends CMMB chip to;
Wherein, described CMMB chip is judged by the quality indication signal of the second radiofrequency signal exported the first radiofrequency signal and the described second radio frequency branch road of described first radio frequency branch road output, quality indication signal in described first and second radiofrequency signals is selected to meet a radiofrequency signal of expection, and abandon another radiofrequency signal, to improve handheld terminal TV receiving effect;
Wherein, described CMMB is China Mobile multimedia broadcasting.
8. device according to claim 7, is characterized in that, described CMMB chip comprises:
First tuner, for receiving the first radiofrequency signal exported with tuning described first radio frequency branch road;
Second tune device, for receiving the second radiofrequency signal exported with tuning described second radio frequency branch road;
Switch control module, for receiving via described first tuner and tuning the first radiofrequency signal of described second tune device and the second radiofrequency signal respectively, and after obtaining its quality indication signal, keep the reception of the radiofrequency signal its quality indication signal in the first and second radiofrequency signals being met to expection;
Quality indication signal judge module, for carrying out quality index judgement successively to the described first or second radiofrequency signal, and feeds back to described switch control module successively by judged result.
9. the device according to claim 7 or 8, is characterized in that, described first radio frequency branch road is high band radio frequency branch road, comprising:
Two L matching network, its input is connected with described built-in aerial output;
Band pass filter, its input is connected with two L matching network output;
Wherein, the output of described band pass filter connects the input as the first tuner of high-frequency tuner in described CMMB chip.
10. the device according to claim 7 or 8, is characterized in that, described second radio frequency branch road is low-frequency range radio frequency branch road, comprising:
First pair of L matching network, its input is connected with described built-in aerial output;
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 the input as the second tune device of low conversion tuner in described CMMB chip.
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 CN102142915A (en) | 2011-08-03 |
| CN102142915B true 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 |
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| CN (1) | CN102142915B (en) |
| WO (1) | WO2012129855A1 (en) |
Families Citing this family (4)
| 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 |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0219034A (en) * | 1988-07-07 | 1990-01-23 | Nippon Telegr & Teleph Corp <Ntt> | Diversity reception method |
| 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 |
-
2011
- 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
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012129855A1 (en) | 2012-10-04 |
| CN102142915A (en) | 2011-08-03 |
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