CN105337623A - Analog front end circuit for orthogonal frequency division multiplexing (OFDM) carrier and Gaussian frequency shift keying (GFSK) wireless bimodule communication receivers - Google Patents
Analog front end circuit for orthogonal frequency division multiplexing (OFDM) carrier and Gaussian frequency shift keying (GFSK) wireless bimodule communication receivers Download PDFInfo
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- CN105337623A CN105337623A CN201410383034.3A CN201410383034A CN105337623A CN 105337623 A CN105337623 A CN 105337623A CN 201410383034 A CN201410383034 A CN 201410383034A CN 105337623 A CN105337623 A CN 105337623A
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Abstract
The invention discloses an analog front end circuit for orthogonal frequency division multiplexing (OFDM) carrier and Gaussian frequency shift keying (GFSK) wireless bimodule communication receivers. The analog front end circuit comprises a low noise amplifier, a mixer, a phase-locked loop, an automatic gain amplifier, an energy detection unit, an adjustable filter, a variable gain amplifier, a second energy detection unit, a gain control unit, an analog-digital converter, a dynamic range expanding module, and a signal detection unit. The low noise amplifier and the mixer are used for wireless signal amplification and down conversion. The automatic gain amplifier, the variable gain amplifier, the adjustable filter, the energy detection unit, the second energy detection unit, the gain control unit and the analog-digital converter are used for processing a power line and a wireless signal. The signal detection unit detects an OFDM signal and a GFSK signal. When the OFDM signal and the GFSK signal are detected at the same time, the dynamic range expanding module can expand the dynamic range of the analog front end circuit, and can process the OFDM signal and the GFSK signal simultaneously.
Description
Technical field
The present invention relates to dual mode communication technology, particularly the analog front circuit of a kind of OFDM power line carrier and GFSK dual mode communication receiver.
Background technology
Internet of Things application branch---in the field such as power information collection, the management of municipal light, building energy efficiency management, Smart Home, what mainly adopt is adopt traditional Single mode communication mode, and mainstream technology mainly contains power line communication and micro power radio communication.
Power line communication utilizes existing power line transmission data, and it utilizes low-voltage power line power distribution network to carry out carrier communication, with low cost, one of major way becoming intelligent meter data recording.In power line carrier communication, in order to obtain higher speed and the interference of anti-arrowband, adopt orthogonal frequency division multiplexi (OFDM).OFDM is divided into several parallel data streams information, then Data Modulation is transmitted to mutually orthogonal single sub-carrier.OFDM reduces intersymbol interference, improves the availability of frequency spectrum, has effectively resisted arrowband interference.
But power line has a lot of characteristic as communication media: time variation is strong, equiva lent impedance transformation range is large, and fading channel is large, interference and noise strong etc.Along with the continuous increase of power consumption equipment kind, various frequency conversion electrical equipment and high-power electric appliance use more and more, and OFDM carrier communication in some conditions cannot proper communication, especially heavy or under disturbing strong condition in load.
Micro power radio communication adopts the modulation system of GFSK, owing to adopting wireless channel as communication media, it is not by the impact of the various non-ideal factors of power line, in various load heavy and under disturbing strong environment communication efficiency fine, but this communication mode is more responsive for wireless shielding, especially the place that iron sheet table case is many with some building walls, cannot proper communication.
Comprehensive above-mentioned situation, needs a kind ofly can both stablize the communication mode with reliable communication under various conditions.
Summary of the invention
The present invention seeks to solve independent dependence power line carrier technology or wireless communication technology at present in power information collection, be difficult to obtain the problem of stable communication efficiency, provide the analog front circuit of a kind of OFDM power line carrier and GFSK wireless double mode communication control processor.
Technical scheme of the present invention is as follows:
The analog front circuit of a kind of OFDM power line carrier and GFSK wireless double mode communication control processor.This circuit comprises: low noise amplifier unit, mixer unit, phase locked-loop unit, automatic gain amplifier, energy detection unit, tunable filter unit, adjustable gain amplifying unit, the second energy detection unit, gain control unit, AD conversion unit, dynamic range lift unit, detecting signal unit.
Described low noise amplifier unit, mixer unit, phase locked-loop unit is used for amplification and the down-conversion of GFSK signal.
Described automatic gain amplifier can input ofdm signal and GFSK signal simultaneously.
Described tunable filter unit dynamic range can regulate.
Described variable gain amplifier unit dynamic range can regulate.
Described analog to digital converter unit dynamic range can regulate.
Described detecting signal unit can detect ofdm signal and GFSK signal.
Described dynamic range lift unit can promote the dynamic range of tunable filter and variable gain amplifier and analog to digital converter.
Beneficial effect of the present invention
As can be seen from technique scheme, the present invention has following beneficial effect:
The analog front circuit of OFDM power line carrier provided by the invention and GFSK wireless double mode communication control processor adopts single signal process path, can process ofdm signal or GFSK wireless signal, also can process ofdm signal and GFSK signal simultaneously.Analog front circuit comprises: low noise amplifier unit, mixer unit, phase locked-loop unit, automatic gain amplifier, energy detection unit, tunable filter unit, adjustable gain amplifying unit, the second energy detection unit, gain control unit, AD conversion unit, dynamic range lift unit, detecting signal unit.
1. the analog front circuit of OFDM power line carrier provided by the invention and GFSK wireless double mode communication control processor can promote the dynamic range of circuit when ofdm signal and GFSK signal exist simultaneously, ensures the integrality of signal.
2. the analog front circuit of OFDM power line carrier provided by the invention and GFSK wireless double mode communication control processor can not start dynamic range lift unit when only having ofdm signal or GFSK signal, maintains the power consumption that integrated circuit is lower.
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
Fig. 1 is system block diagram of the invention process
Fig. 2 is the structure chart of automatic gain amplifier of the invention process and energy detection unit
Fig. 3 is the structure chart of variable band-pass filter of the invention process
Fig. 4 is adjustable gain amplifying unit of the invention process, the structure chart of the second energy detection unit and gain control unit
Fig. 5 is the structure chart of analog to digital converter of the invention process
Fig. 6 is the structure chart of dynamic range lift unit of the invention process
Claims (9)
1. claims
. the analog front circuit of a kind of OFDM power line carrier and GFSK wireless double mode communication control processor.
2. this circuit comprises: low noise amplifier unit, mixer unit, phase locked-loop unit, automatic gain amplifier, energy detection unit, tunable filter unit, adjustable gain amplifying unit, the second energy detection unit, gain control unit, AD conversion unit, dynamic range lift unit, detecting signal unit.
3. low noise amplifier unit as claimed in claim 1, mixer unit, phase locked-loop unit, is characterized in that: described low noise amplifier unit, mixer unit, and phase locked-loop unit is used for amplification and the down-conversion of GFSK signal.
4. automatic gain amplifier unit as claimed in claim 1, is characterized in that: described automatic gain amplifier can input ofdm signal and GFSK signal simultaneously.
5. tunable filter unit as claimed in claim 1, is characterized in that: described tunable filter unit dynamic range can regulate.
6. variable gain amplifier unit as claimed in claim 1, is characterized in that: described variable gain amplifier unit dynamic range can regulate.
7. analog to digital converter as claimed in claim 1, is characterized in that: described analog to digital converter unit dynamic range can regulate.
8. detecting signal unit as claimed in claim 1, is characterized in that: described detecting signal unit can detect ofdm signal and GFSK signal.
9. dynamic range lift unit as claimed in claim 1, is characterized in that: described dynamic range lift unit can promote the dynamic range of tunable filter and variable gain amplifier and analog to digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410383034.3A CN105337623A (en) | 2014-08-06 | 2014-08-06 | Analog front end circuit for orthogonal frequency division multiplexing (OFDM) carrier and Gaussian frequency shift keying (GFSK) wireless bimodule communication receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410383034.3A CN105337623A (en) | 2014-08-06 | 2014-08-06 | Analog front end circuit for orthogonal frequency division multiplexing (OFDM) carrier and Gaussian frequency shift keying (GFSK) wireless bimodule communication receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105337623A true CN105337623A (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410383034.3A Pending CN105337623A (en) | 2014-08-06 | 2014-08-06 | Analog front end circuit for orthogonal frequency division multiplexing (OFDM) carrier and Gaussian frequency shift keying (GFSK) wireless bimodule communication receivers |
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| CN (1) | CN105337623A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1808915A (en) * | 2004-11-02 | 2006-07-26 | 因芬尼昂技术股份公司 | Receiving apparatus of mobile communication system |
| JP2007221251A (en) * | 2006-02-14 | 2007-08-30 | Hitachi Ltd | Multiple transmission system |
| CN101557476A (en) * | 2008-04-11 | 2009-10-14 | 上海锐协微电子科技有限公司 | Single-chip multi-mode digital television tuner |
| WO2012014579A1 (en) * | 2010-07-30 | 2012-02-02 | 株式会社メガチップス | Communication device and communication system |
| US20120147814A1 (en) * | 2010-12-14 | 2012-06-14 | Motorola, Inc. | Supporting communication devices with different technologies within the same communication channel |
| CN103248382A (en) * | 2013-05-17 | 2013-08-14 | 北京华强智连微电子有限责任公司 | Analog front-end circuit of OFDM (Orthogonal Frequency Division Multiplexing) power line carrier communication receiver |
| CN103400492A (en) * | 2013-06-24 | 2013-11-20 | 深圳市国电科技通信有限公司 | Dual-mode communication chip integrating power line and wireless communication and acquisition equipment |
-
2014
- 2014-08-06 CN CN201410383034.3A patent/CN105337623A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1808915A (en) * | 2004-11-02 | 2006-07-26 | 因芬尼昂技术股份公司 | Receiving apparatus of mobile communication system |
| JP2007221251A (en) * | 2006-02-14 | 2007-08-30 | Hitachi Ltd | Multiple transmission system |
| CN101557476A (en) * | 2008-04-11 | 2009-10-14 | 上海锐协微电子科技有限公司 | Single-chip multi-mode digital television tuner |
| WO2012014579A1 (en) * | 2010-07-30 | 2012-02-02 | 株式会社メガチップス | Communication device and communication system |
| US20120147814A1 (en) * | 2010-12-14 | 2012-06-14 | Motorola, Inc. | Supporting communication devices with different technologies within the same communication channel |
| CN103248382A (en) * | 2013-05-17 | 2013-08-14 | 北京华强智连微电子有限责任公司 | Analog front-end circuit of OFDM (Orthogonal Frequency Division Multiplexing) power line carrier communication receiver |
| CN103400492A (en) * | 2013-06-24 | 2013-11-20 | 深圳市国电科技通信有限公司 | Dual-mode communication chip integrating power line and wireless communication and acquisition equipment |
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Application publication date: 20160217 |