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Abstract
This paper proposes a hardware platform for WCDMA baseband data transmission, which consists of USB3.0 interface, general purposes processor (GPP), and software defined radio (SDR) system. In view of the requirements of WCDMA system, the hardware platform consisting of USB3.0 controller, FPGA and DDRII was selected, which finally realized the high throughput rate and low delay transmission of baseband data of WCDMA system. The experimental results show that in this GPP software defined radio system, the interface speed of USB3.0 can reach 200MBps, and the loopback delay time of the system is about 0.7ms, which can meet the requirements of WCDMA system.
Highlights
WCDMA[1] is one of the third-generation wireless communication standards adopted by the International Telecommunication Union (ITU)
We can find that the interface rate between FPGA and USB3.0 controller, DDRII and RF terminal is constant, so the speed at which USB3.0 controller communicates with general purpose processors (GPP) determines the transmission rate of hardware platform
4.1 System transmission rate analysis In order to ensure the correctness of data transmission, the block transmission mode is used as a method for data transmission between the USB 3.0 controller and the GPP in the design, and the packet length is 1 Kbyte
Summary
WCDMA[1] is one of the third-generation wireless communication standards adopted by the International Telecommunication Union (ITU). It adopts Frequency Division Duplex (FDD), which has the advantages of flexible service, high spectrum efficiency, wide capacity and wide coverage. Software defined radio (SDR)[2] is an architecture of a wireless communication system proposed in the 1990s. It has the advantages of short development cycle, high efficiency, low cost, and flexibility, and is suitable for forward-looking research. The main software defined radio platforms currently include general purpose processors (GPP), FPGA, and DSP. Software defined radio systems based on GPP and Windows operating systems are mainly discussed
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