基于FPGA的STA-CORDIC算法在SCME中的应用  

The application in SCME of STA-CORDIC based on FPGA

作　　者：王华华[1] 陈雷成 陈发堂[1] 李明[1] 汪朋锐[1] 

机构地区：[1]重庆邮电大学重庆市移动通信技术重点实验室,重庆400065

出　　处：《电子技术应用》2014年第8期109-111,115,共4页Application of Electronic Technique

基　　金：国家科技重大专项(2011ZX03001-003-01);重庆邮电大学青年科学基金工程(A2012-89)

摘　　要：鉴于SCME(演进型空间信道建模)过程中,基于CORDIC算法定点嵌套正余弦函数处理的重要性及其结果精度、资源消耗和延时时间之间的博弈性,提出了STA-CORDIC算法,即在传统CORDIC算法结构之外增加算法精度与迭代次数、定点比特数之间多参量误差统计分析模块,之后基于Xilinx公司Virtex-6芯片做算法FPGA实现。通过TD-LTE射频一致性测试仪表SCME模块的应用,验证了算法结果能够较好地解决上述计算精度和处理速度的最优化折中问题。In view of the importance of fixed-point Sine and Cosine functions based on CORDIC and the game problem a- mong the algorithm accuracy, resource consumption and delay time in SCME （Spatial Channel Modeling Extended）, this article pre- sents the STA-CORDIC which adding a error statistical analysis module of algorithm accuracy, the number of iterations and the fixed-point number of bits after the traditional CORDIC algorithm, and then conducting the FPGA implement based on the Virtex- 6 chip of Xilinx company. Through the application in the SCME module in LTE RF conformance testing instrument verified that this algorithm could solve the optimization tradeoff between the accuracy and processing speed.

关 键 词：STA—CORDIC 三角函数 SCME 定点仿真 

分 类 号：TN929.5[电子电信—通信与信息系统]