CN201966948U - Orthogonal frequency division multiplexing (OFDM) modulation and demodulation module - Google Patents
Orthogonal frequency division multiplexing (OFDM) modulation and demodulation module Download PDFInfo
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- CN201966948U CN201966948U CN201120011791XU CN201120011791U CN201966948U CN 201966948 U CN201966948 U CN 201966948U CN 201120011791X U CN201120011791X U CN 201120011791XU CN 201120011791 U CN201120011791 U CN 201120011791U CN 201966948 U CN201966948 U CN 201966948U
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Abstract
The utility model relates to an orthogonal frequency division multiplexing (OFDM) modulation and demodulation module. A main control chip of the OFDM modulation and demodulation module has a type of DSS7700, the OFDM modulation and demodulation module mainly consists of the DSS7700 chip and a peripheral circuit of the DSS7700 chip, and the modulation and the demodulation on electric signals are realized, wherein a serial peripheral interface (SPI), an analog front end-digital-to-analog converter (AFE_DAC) interface and an analog front end-analog-to-digital converter (AFE_ADC) interface of the OFDM modulation and demodulation module are respectively in butt joint with an SPI, an AFE_DAC interface and a front end-analog-to digital converter (FE_ADC) interface of the main control chip (with the type of DSS9XXX series), in addition, an nRES of the OFDM modulation and demodulation module is in butt joint with an nRES interface of an Ethernet number receiving and transmission module and an nRES interface of the main control chip, and a programmable logic control (PLC) interface of the OFDM modulation and demodulation module is in butt joint with a PLC interface of a power supply and carrier module. Through the design, the data signal transmission on a power line is realized, and the Internet surfing and the interactive television watching can be realized by users in places with electricity. The product of the OFDM modulation and demodulation module has the advantages that the velocity is stable, safety and reliability are realized, the installation and the operation are simple and easy, and the OFDM modulation and demodulation module belongs to ideal network equipment for family Internet surfing, audio ordering, video conferences, on-line games and video ordering.
Description
Technical field
The utility model relates to web-transporting device, carries out the OFDM modulation and the demodulation module of the net control device of transmission signals specifically by power line.
Background technology
At present, being connected to network generally is to connect by wired or wireless device, because it is bigger that wireless device is subjected to the influence of signal strength signal intensity, generally under signal shielding zone or weather conditions such as overcast and rainy, signal strength signal intensity is affected, so wireless device can only be used for some customers not high to the stability requirement of signal, main flow equipment commonly used at present still is wired.And wiring logging-on function equipment generally depends on netting twine and transmits, and this depends on different webserver providers again, in case use wireline equipment to surf the Net, need pre-install wireline equipment in earlier stage and set up netting twine, and this itself just brings certain cost.
The utility model content
The purpose of this utility model provides a kind of transmission control equipment that netting twine just can be surfed the Net that do not need to set up, as long as have power line to pass through in the family, can use.
The purpose of this utility model is to be achieved through the following technical solutions:
OFDM modulation and demodulation module, its main control chip model is DSS7700, it mainly is made up of DSS7700 chip and peripheral circuit thereof, realizes modulation and demodulation to the signal of telecommunication;
Wherein SPI, AFE_DAC, the AFE_ADC interface of OFDM modulation and demodulation module dock with SPI, AFE_DAC, the FE_ADC interface of master control chip (model is a DSS9XXX series) respectively, and OFDM modulation and demodulation module nRES receive with the ether network No. and the nRES interface of transport module and the nRES interface of master control chip dock, OFDM modulate and demodulation module the PLC interface dock with the PLC interface of power supply and carrier module.
By above-mentioned design, realized power line transmitting data signal, as long as have the electricity local user just can: surf the Net, see interactive TV.This product rate stabilization, safe and reliable, fitting operation is simple and easy, is the network equipment of desirable family online, Audio on Demand, video conference, game on line, video request program.
Description of drawings
With embodiment the utility model is described in further detail with reference to the accompanying drawings below.
Fig. 1 is the structure chart of OFDM modulation and the applied power line transmission controller of demodulation module (DMHP1200).
Embodiment
As shown in Figure 1, the pairing product facility model of the utility model is DMHP1200, and DMHP1200 major control module is the DSS9010 module, and it mainly is made up of DSS9010 chip and peripheral circuit thereof, and realization is to Signal Processing and convert ethernet signal to.DSS9010 uses optimal solution for family's high speed media.DSS9010 uses optimal solution for family's high speed media, or as the household power net equipment of setting up the high-speed home network.Be applied to multimedia and clear data, support real time data exchange and QoS management.
The DSS7700 module of DMHP1200 is OFDM modulation and demodulation module, and it mainly is made up of DSS7700 chip and peripheral circuit thereof, realizes modulation and demodulation to the signal of telecommunication.Wherein SPI, AFE_DAC, the AFE_ADC interface of OFDM modulation and demodulation module dock with SPI, AFE_DAC, the FE_ADC interface of master control chip (model is a DSS9XXX series) respectively, and OFDM modulation and demodulation module nRES receive with the ether network No. and the nRES interface of transport module and the nRES interface of master control chip dock, OFDM modulates and the PLC interface of demodulation module docks with the PLC interface of power supply and carrier module.
DSS7700 is a quick, able to programme, high performance analog integrated circuit (IC), and is used in combination together with DSS9XXX, is the element of DS2-based equipment.Constituted a complete AFE (analog front end) (AFE) with the filter and the interlock circuit of periphery.This IC has comprised a programmable AMP transmission channel, a programmable low noise amplifier (LNA) and a programmable gain amplifier (PGA) passage for receiving.
The ETH module of DMHP1200 receives and transport module for the ether network No., and it mainly is made up of RTL8201CP chip and peripheral circuit thereof, realizes ethernet signal is received and transmission.RTL8201CP is the physical layer transceiver of a single port, and it has only a MII/SNI (Media Independent Interface/serial network interface) interface.It meets RJ45 by network transformer YL18-2050S or YT37-1107S and realizes whole 10/100M ethernet physical layer functions, comprise physical layer encodes sublayer (PCS), physical layer medium connection device (PMA), twisted-pair feeder physical media be correlated with sublayer (TP-PMD), 10Base-Tx encoding and decoding and twisted-pair feeder medium access unit (TPMAU).The support of PECL interface connects the 100Base-FX fiber optical transceiver of an outside.
The POWER module of DMHP1200 is power supply and carrier module, and it is mainly other each functional module power supply and carries out the reception and the transmission of the signal of telecommunication.
Claims (1)
1.OFDM modulation and demodulation module, its main control chip model is DSS7700, and it mainly is made up of DSS7700 chip and peripheral circuit thereof, realizes modulation and demodulation to the signal of telecommunication; It is characterized in that,
Wherein SPI, AFE_DAC, the AFE_ADC interface of OFDM modulation and demodulation module dock with SPI, AFE_DAC, the FE_ADC interface of master control chip respectively, and OFDM modulation and demodulation module nRES receive with the ether network No. and the nRES interface of transport module and the nRES interface of master control chip dock, OFDM modulates and the PLC interface of demodulation module docks with the PLC interface of power supply and carrier module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120011791XU CN201966948U (en) | 2011-01-17 | 2011-01-17 | Orthogonal frequency division multiplexing (OFDM) modulation and demodulation module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120011791XU CN201966948U (en) | 2011-01-17 | 2011-01-17 | Orthogonal frequency division multiplexing (OFDM) modulation and demodulation module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201966948U true CN201966948U (en) | 2011-09-07 |
Family
ID=44529501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120011791XU Expired - Fee Related CN201966948U (en) | 2011-01-17 | 2011-01-17 | Orthogonal frequency division multiplexing (OFDM) modulation and demodulation module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201966948U (en) |
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2011
- 2011-01-17 CN CN201120011791XU patent/CN201966948U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20130117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |