CN1251425C - Method for realizing adjustment of radio network card transmission power - Google Patents
Method for realizing adjustment of radio network card transmission power Download PDFInfo
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- CN1251425C CN1251425C CN 02140805 CN02140805A CN1251425C CN 1251425 C CN1251425 C CN 1251425C CN 02140805 CN02140805 CN 02140805 CN 02140805 A CN02140805 A CN 02140805A CN 1251425 C CN1251425 C CN 1251425C
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Abstract
The present invention relates to a method for adjusting the transmission power of a wireless network card, namely that the input signal intensity and the gain of a power amplifier are adjusted. The method comprises the following detailed steps: accessed signals on an MAC (Medium Access Control) layer are processed by a baseband so as to finish the digital modulation of the signals; a primary frequency conversion is finished through medium frequency I/Q modulation; secondary frequency conversion is finished through radio frequency modulation demodulation; the signals are adjusted through the power amplifier before transmitted through an antenna. Through changing numerical values stored in a register which controls A/D conversion, the present invention adjusts the power output of the power amplifier, can conveniently adjust the transmitting power of the network card, and can achieve the perfect combination of the functions, the performance and the security of the network card.
Description
Technical field:
The present invention relates to the adjustable implementation method of a kind of wireless network card transmitting power, be meant a kind of implementation method of wireless computer network adapter transmitting power size adjustment especially.
Background technology:
Because plurality of advantages such as WLAN (wireless local area network) have networking flexibility, and the networking time is fast, and mobility is good, wireless local area network technology has obtained development rapidly in worldwide in recent years.But as the capital equipment wireless network card that constitutes WLAN (wireless local area network), its transmitting power but is to have been designed by manufacturer when product export, so this transmitting power is immutable, and this has influenced flexibility, fail safe that wireless network card uses greatly.
Present wireless network card major part is operated on the above frequency range of 2.4GHz or 5GHz; Can produce influence in various degree during its work to the equipment that works in this frequency range simultaneously.Varying in size of transmitting power, influence degree also is not quite similar.The big more influence to miscellaneous equipment of transmitting power is big more.The opposite more little influence to miscellaneous equipment of transmitting power is more little.Transmitting power is directly proportional with its transmission range again simultaneously, that is: the big more transmission range of transmitting power is far away more.But, its long transmission distance after, level security will reduce relatively.So it is very important that the transmitting power of wireless network card is adjusted to a suitable value.
Summary of the invention:
Main purpose of the present invention is to provide a kind of wireless network card transmitting power adjustable implementation method, the user can be according to the actual conditions of oneself, by the wireless network card application software, regulate the transmitting power of wireless network card easily, reach the perfect adaptation of function, performance, fail safe.
The object of the present invention is achieved like this:
The adjustable implementation method of a kind of wireless network card transmitting power is adjusted the input signal strength of power amplifier or the gain of power amplifier; Be specially:
Step 1: the power parameter value that the network interface card administration module is selected according to the user is written to parameter in the corresponding registers group of baseband processor by medium access control (Media Access Controller is called for short MAC) layer;
Step 2:MAC layer passes through baseband processor with the signal that inserts, and finishes the digital modulation of signal; And the intensity of the parameter output baseband digital signal that is provided with according to register, single-conversion is finished in modulation through intermediate frequency I/Q;
Step 3: the double conversion of signal is finished in demodulation through rf modulations;
Step 4: launch by antenna again after by power amplifier signal being amplified.
Described power parameter value is determined by calibration power output parameter, and is stored among the memory of this wireless network card in the wireless network card production process.
Described power parameter value is more than the cover.
Described Base-Band Processing comprises at least: the data scrambling of transmitting chain signal, digital modulation, output is multiplexing and power adjustments.
Described power adjustments realizes by the digital-to-analogue conversion of digital signal, and the numerical value by storing in the register that changes the control digital-to-analogue conversion, carries out the gain adjustment of power amplifier.
The numerical value of the present invention by being stored in the register that changes the control digital-to-analogue conversion has been realized the gain adjustment of power amplifier, can regulate the transmitting power of wireless network card easily, has reached function, the performance of wireless network card, the perfect adaptation of fail safe.
Description of drawings:
Fig. 1 is the theory diagram of wireless network card signal processing of the present invention.
Embodiment:
The present invention is described in further detail below in conjunction with accompanying drawing and specific embodiment:
The transmitting power of wireless network card equals the input signal strength of power amplifier and the power amplifier gain is multiplied each other.Therefore, the gain of the input signal strength of control power amplifiers or control power amplifiers just can realize the adjustment to the wireless network card transmitting power.
Referring to Fig. 1, the transmitting power of wireless network card is relevant with transmitting chain, and the signal processing of transmitting chain comprises: the MAC layer passes through baseband processor with the signal that inserts, and finishes the digital modulation of signal; Then, finish single-conversion through the in-phase component and quadrature component (In-phase data andQuadrature data the is called for short I/Q) modulation of intermediate frequency digital modulation signals; Separating timing through rf modulations, finish the double conversion of signal, last, signal carried out power amplification after, launch by antenna.
Specifically comprise in base band signal process of the present invention: the data scrambling of transmitting chain signal, digital modulation, output is multiplexing and digital-to-analogue conversion.Wherein, the gain-adjusted of digital-to-analogue conversion is the key that realizes that power is adjusted.And the gain-adjusted of digital-to-analogue conversion can realize by the numerical value of being stored in the register that the control digital to analog conversion is set.Transmitting of baseband processor by after the digital modulation (MOD), through digital-to-analogue conversion output baseband signal, the registers group that is provided with is controlled the gain of this digital-to-analogue conversion, reaches the output of control baseband modulation signal, finally reaches the power output function of control network interface card.
In being provided with the computer of wireless network card of the present invention, computer is read corresponding power in the network interface card by hypervisor, the driver of network interface card, and pass to bottom software, this bottom software writes parameter in the corresponding control register of baseband processor by the MAC layer, and this control register is used to control the gain of the digital-to-analogue conversion of wireless network card output signal.
For example, can three sets of data be set with large, medium and small three kinds of power output to register, produce during in process of production the calibration of power of this three sets of data, comprise baseband signal strength control parameter corresponding to network interface card, power output rollback parameter, the corresponding cover power output of every suit data parameters.Data generate the back and are stored in the hardware flash memory or electric erasable read only memory of network interface card by specific software.If customer requirements (for example: 18dBmw) is exported when high-power, can select respective selection by application program, application program is read high-power parameter in the flash memory by driver, import high-power parameter by MAC to the registers group of the control digital to analog conversion of baseband processor, wireless network card output is high-power; (for example: 12dBmw), application program is read middle power parameter in the flash memory, power parameter in the registers group input of baseband processor control digital to analog conversion, power in the wireless network card output by driver in the same output during power; Output is during small-power, and (for example: 6dBmw), application program is read small-power parameter in the flash memory by driver, to the register input group input small-power parameter of baseband processor control digital to analog conversion, wireless network card output small-power.In a word, the user selects power grade by application program, and application program realizes the output of control baseband signal amplitude by the value of driver and MAC layer control baseband processor digital to analog conversion register, reaches the adjusting to wireless network card power.
Above embodiment is the unrestricted technical scheme involved in the present invention in order to explanation only, although the present invention is had been described in detail with reference to above preferred embodiment, those of ordinary skill in the art should be appreciated that technical scheme of the present invention can make amendment, is out of shape or is equal to replacement; And do not break away from the spirit and scope of technical solution of the present invention, all should be encompassed among the claim scope of the present invention.
Claims (5)
1, the adjustable implementation method of a kind of wireless network card transmitting power is characterized in that: the input signal strength of power amplifier or the gain of power amplifier are adjusted; Be specially:
Step 1: the network interface card administration module is written to parameter in the corresponding registers group of baseband processor according to the power parameter value that the user selects by medium access control layer;
Step 2:MAC layer passes through baseband processor with the signal that inserts, and finishes the digital modulation of signal; And the intensity of the parameter output baseband digital signal that is provided with according to register, modulate with quadrature component through the intermediate frequency in-phase component and to finish single-conversion;
Step 3: the double conversion of signal is finished in demodulation through rf modulations;
Step 4: launch by antenna again after by power amplifier signal being amplified.
2, the adjustable implementation method of wireless network card transmitting power according to claim 1 is characterized in that: described power parameter value is determined by calibration power output parameter, and is stored among the memory of this wireless network card in the wireless network card production process.
3, the adjustable implementation method of wireless network card transmitting power according to claim 1 and 2 is characterized in that: described power parameter value is more than the cover.
4, the adjustable implementation method of wireless network card transmitting power according to claim 1, it is characterized in that: described Base-Band Processing comprises at least: the data scrambling of transmitting chain signal, digital modulation, output is multiplexing and power adjustments.
5, according to claim 1 or the adjustable implementation method of 4 described wireless network card transmitting powers, it is characterized in that: described power adjustments realizes by the digital-to-analogue conversion of digital signal, and the numerical value by storing in the register that changes the control digital-to-analogue conversion carries out the gain adjustment of power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02140805 CN1251425C (en) | 2002-06-30 | 2002-06-30 | Method for realizing adjustment of radio network card transmission power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02140805 CN1251425C (en) | 2002-06-30 | 2002-06-30 | Method for realizing adjustment of radio network card transmission power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1474517A CN1474517A (en) | 2004-02-11 |
| CN1251425C true CN1251425C (en) | 2006-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02140805 Expired - Lifetime CN1251425C (en) | 2002-06-30 | 2002-06-30 | Method for realizing adjustment of radio network card transmission power |
Country Status (1)
| Country | Link |
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| CN (1) | CN1251425C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1983851B (en) * | 2006-06-16 | 2010-07-28 | 华为技术有限公司 | Method for supporting multi-power by amplifier and radio-frequency module |
| CN101729109B (en) * | 2009-11-23 | 2013-08-07 | 华为终端有限公司 | Method and device for enhancing signal of data card |
| CN102131274A (en) * | 2011-03-11 | 2011-07-20 | 华为终端有限公司 | Communication data card and working method thereof |
| CN103346806A (en) * | 2013-06-14 | 2013-10-09 | 成都锐奕信息技术有限公司 | Wireless emitter with adjustable output |
-
2002
- 2002-06-30 CN CN 02140805 patent/CN1251425C/en not_active Expired - Lifetime
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| Publication number | Publication date |
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| CN1474517A (en) | 2004-02-11 |
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