| 摘要: |
| 介绍了在扩频通信系统中一种产生数字下变频器(DDC)正交本振信号的方法--CORDIC算法,它在产生正弦值和余弦值时不需要太多的ROM资源,只需要简单的移位和加法等迭代操作,很容易在VLSI芯片上实现;文中也给出了用该算法实现DDC的VLSI结构. |
| 关键词: 扩频通信 数字下变频 CORDIC算法 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:June 09, 2006Revised:September 20, 2006 |
| 基金项目: |
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| An Algorithm for Realizing DDC in Spread-Spectrum Communication System |
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| Abstract: |
| Using CORDIC algorithm to generate orthogonal local oscillator signal for digital down converter(DDC) in spread-spectrum communication system is introduced.With this algorithm,no much ROM resource is needed when producing cosine and sine values,and only iterative operation of shifting-bit and ADD is required.It can be realized easily on VLSI chip.A VLSI structure for realizing DDC is also given. |
| Key words: spread - spectrum communication DDC CORDIC algorithm |
