Based On The Design Of Wireless Broadband Data Of The Dsp Receiver Card

Digtial microwave communication system(MMDS) is in the ascendant in our country.Digital MMDS can provide data transmission of wideband and high-speed baud rate,not only transmits multichannel of TV but also high-speed digital datas,so it is very convenient to transmit digital datas such as voice,text,image in this system from remote place. This dissertation introduces the processing and implementing mothods under digital MMDS frame.In an older microwave communication system,analog television signal was transferred in 8MHz band,and the carrier frequency is 2.4GHz which can transfers signal away from transmitter about 20—50 kilometers in FSK modulator.Now required use the existent resource to transfer high-speed digital signal but need not to change the transmitter and modem.The analog television signal should to be replaced by digital signal while the band is 8MHz too.After this change the new system can transfer not only analog television signal but also high-speed digital signal. The emphases of the dissertation is on the designing and implementing of baseband signal processing of receive board.At first receive board regulates the data wave and search bit synchronous,and runs some operation such as de-interlaving ,decoding of signal channel, parsing frame and decryption which are implement in DSPs.In order to operate receive board expediently,the board is inserted into PCI slot of computer and send datas into computer. In order to run the cards in different operation system such as Windows2000/NT/XP the driver must be WDM format.The application program which controls the exchange of datas is programmed in VC++ language. Sum up all above,the new microwave communication system can implements high speed data communication,and the system has a...