Summary of the invention
Present invention aim at providing a kind of and have the advantages such as long transmission distance, transfer rate height, good in anti-interference performance based on
Industry ethernet can realize the four-way optical fiber mark frequency module of soft or hard intersection switching.
For reaching above-mentioned purpose, the present invention proposes a kind of four-way optical fiber mark that can realize soft or hard intersection switching based on industry ethernet
Frequency module, including power module, power splitter, 4 photoelectric switching circuits, 1 PPC chip, 1 fpga chip, 4
Sram chip, 2 FLASH chip, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and
Two panels LVDS exchange chip, power splitter that wherein electric power source pair of module is above-mentioned, 4 photoelectric switching circuits, 1 PPC chip, 1
Individual fpga chip, 4 sram chips, 2 FLASH chip, 2 Ethernet chips, 1 RS232 interface chip,
Radio-frequency (RF) switch chip and two panels LVDS exchange chip are powered, 1 fpga chip, 4 sram chips, 2 FLASH chip,
2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and two panels LVDS exchange chip are all connected with
The PPC chip stated;
Wherein, PPC chip is by the outside LVDS level signal of radio-frequency (RF) switch input or internal crystal oscillator source, by radio-frequency (RF) switch chip
Carry out mark frequency signal behavior, and use power splitter distribution after marking frequency signal, to be respectively supplied to data intermediate frequency module and the FPGA of outside
Circuit, PPC chip is responsible for controlling the internal each chip of management, and 2 too network interface chips realize external ethernet communication and string respectively
Port communications, 2 FLASH chip connect the operation programs being responsible for preserving PPC, just add electrically activate time, PPC passes through Flash core
Sheet leads into Vxworks operating system, and SRAM is for preserving the data in PPC chip processing procedure.Fpga chip realizes number
The soft switch of word intermediate frequency LVDS signal, is then converted to light by the digital medium-frequency signal of each passage by 4 photoelectric switching circuits and believes
Number it is sent to far-end RF module by optical fiber.
Further, wherein the model of PPC chip be MPC8280, the model of FPGA circuitry be EP2SGX30,4 SRAM cores
The model of sheet is K4S511632, the model of 2 FLASH chip is S29GL512N10F, the type of 2 Ethernet chips
Number for LXT971AL and H1102, the model that model is PE4259 and two panels LVDS exchange chip of radio-frequency (RF) switch chip it is
DS10CP154。
In sum, the present invention uses software radio thought, uses PPC and FPGA to coordinate, except using FPGA to realize LVDS
Soft switch, it is possible to realized the hard exchange of different LVDS signal by PPC chip controls, thus in realizing between different passage
The flexible exchange of frequency evidence.And using industry ethernet form between main control module, transfer rate is high, and communication reliability is good.
Software can be realized loaded by bus, machine need not be opened, so having software programmable flexibly, convenient, flat
Sliding upgrade function.
Detailed description of the invention
In order to know more about the technology contents of the present invention, especially exemplified by specific embodiment and coordinate institute's accompanying drawings to be described as follows.
As it is shown in figure 1, four-way optical fiber mark frequency module is by industry ethernet and master control system communication, outside 4 road ifd modules
Digital signal be transferred to four-way optical fiber mark frequency module by LVDS level, become light by after 4 tunnel opto-electronic conversion therein
Signal.Optical fiber mark frequency module is connected with 4 road radio-frequency modules of distant transmitter by optical fiber and transmits optical signal.
Fig. 2 is the concrete schematic diagram of the four-way optical fiber mark frequency module of the embodiment of the present invention.Soft or hard can be realized based on industry ethernet
The four-way optical fiber mark frequency module of switching of intersecting include power module, power splitter, 4 photoelectric switching circuits, 1 PPC chip,
1 fpga chip, 4 sram chips, 2 FLASH chip, 2 Ethernet chips, 1 RS232 interface core
Sheet, radio-frequency (RF) switch chip and two panels LVDS exchange chip, have a long transmission distance, and transfer rate is high, good in anti-interference performance excellent
Point.
Power splitter that wherein electric power source pair of module is above-mentioned, 4 photoelectric switching circuits, 1 PPC chip, 1 fpga chip, 4
Sram chip, 2 FLASH chip, 2 Ethernet chips, 1 RS232 interface chip, radio-frequency (RF) switch chip and
Two panels LVDS exchange chip is powered, 1 fpga chip, 4 sram chips, 2 FLASH chip, 2 Ethernet interfaces
Chip, 1 RS232 interface chip and radio-frequency (RF) switch chip and two panels LVDS exchange chip are all connected with above-mentioned PPC chip.
Wherein, PPC chip, by the outside LVDS level signal of radio-frequency (RF) switch input or internal crystal oscillator source, is carried out by radio-frequency (RF) switch chip
Mark frequency signal behavior, and use power splitter distribution after marking frequency signal, to be respectively supplied to data intermediate frequency module and the FPGA circuitry of outside,
PPC chip is responsible for controlling the internal each chip of management, and 2 too network interface chip realizes external ethernet communication respectively and serial ports leads to
Letter, 2 FLASH chip connect the operation programs being responsible for preserving PPC, just add electrically activate time, PPC is drawn by Flash chip
Leading entrance Vxworks operating system, SRAM is for preserving the data in PPC chip processing procedure.Fpga chip realizes in numeral
Frequently the soft switch of LVDS signal, is then converted to optical signal by the digital medium-frequency signal of each passage by 4 photoelectric switching circuits and leads to
Cross optical fiber and be sent to far-end RF module.
Further, wherein the model of PPC chip be MPC8280, the model of FPGA circuitry be EP2SGX30,4 SRAM cores
The model of sheet is K4S511632, the model of 2 FLASH chip is S29GL512N10F, the type of 2 Ethernet chips
Number for LXT971AL and H1102, the model that model is PE4259 and two panels LVDS exchange chip of radio-frequency (RF) switch chip it is
DS10CP154。
Present invention achieves the purpose providing unified high accurate clock signal for 4 outside IF process modules, signal source is
The high stable crystal oscillator of inside modules, it is also possible to be from outside standard frequency source.This module is by four outsides simultaneously
The intermediate frequency LVDS signal of data intermediate frequency module is converted to optical signal, is then passed to external radio frequency module at a distance.And this module is used
Software radio thought, uses PPC and FPGA to coordinate, except using FPGA to realize the soft switch of LVDS, it is possible to pass through PPC
Chip controls realizes the hard exchange of different LVDS signal, can complete the soft or hard intersection switching of 4 paths LVDS signals, thus
Realize the flexible of the intermediate frequency data between different passage to exchange.And use industry ethernet form between main control module, permissible
Reaching 20Km, have long transmission distance, transfer rate is high, the advantage of good in anti-interference performance.And transfer rate is high, communication reliability
Good, it is possible to achieve software is loaded by bus, need not open machine, so having software programmable flexibly, convenient,
Smooth upgrade function.
1, the source of intermediate frequency LVDS signal, this module can realize the soft switch of digital intermediate frequency LVDS signal and hard exchange, its
Middle use FPGA realizes the soft switch of LVDS signal, realizes LVDS signal by PPC chip controls DS10CP154
Hard exchange.When realizing LVDS signal soft switch, FPGA uses
The standard frequency source of crystal oscillator source or outside provides unified clock signal.
2, soft switch and hard exchange implement process
As depicted in figs. 1 and 2, PPC chip controls LVDS exchange chip and fpga chip respectively to 4 road LVDS signals
Swap.LVDS exchange chip plays the effect of hard exchange, two panels LVDS exchange chip respectively according to control signal S00, S01,
S10, S11, S20, S21, S30, S31, to four roads LVDS differential signal OP1 (being made up of OP_TX1, OP_RX1 etc.),
OP2 (being made up of OP_TX2, OP_RX2 etc.), OP3 (being made up of OP_TX3, OP_RX3 etc.), OP4 (by OP_TX4,
OP_RX4 etc. form) configure and exchange.LVDS signal after exchange be first via MF1 signal (by MF_TX1,
MF_RX1 etc. form), the second road MF2 signal (being made up of MF_TX2, MF_RX2 etc.), the 3rd road MF3 signal (by
MF_TX3, MF_RX3 etc. form), the 4th road MF4 signal (being made up of MF_TX3, MF_RX3 etc.).
Before and after LVDS exchange chip control signal and exchange, four road LVDS signal corresponding relations are shown in Table 1.
Table 1
Fpga chip plays the effect of soft switch, fpga chip respectively according to PPC control signal DQ9B, DQ7B, DQ5B,
Four road LVDS signals are configured and exchange by DQ3B, DQ1B.Four road LVDS signals pair before and after control signal and exchange
Should be related to and be shown in Table 2.
Although the present invention is disclosed above with preferred embodiment, so it is not limited to the present invention.The technical field of the invention
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, originally
The protection domain of invention is when being as the criterion depending on those as defined in claim.