| 摘要: |
| 在扩频通信系统中,伪码捕获跟踪是通信的基础,捕获时间的长短直接影响系统性能。为缩短捕获时间,可以采用并行、FFT频域捕获等方法。介绍了一种采用Walsh变换进行伪码捕获的方法,整个过程只需一次Walsh运算,可以进一步缩短捕获时间,并且只涉及加法而没有FFT运算所需的复数和乘法运算,具有运算速度快、占用资源少、实现简单等特点。 |
| 关键词: 扩频通信,伪码捕获,Walsh变换,移位寄存器 |
| DOI：10.3969/j.issn.1001-893X. |
| 修订日期：2007-11-30 |
| 基金项目: |
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| A Fast Algorithm for Pseudocode Acquisition |
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| Abstract: |
| In a spread spectrum communication system,pseudocode acquisition and tracking is the base of communication and the acquisition time has direct effect on system performance.In system implementation,the methods such as parallel acquisition and FFT acquisition in frequency domain.may be used in order to shorten acquisition time.A pseudocode acquisition method using Walsh transform is introduced in this paper.Because only one Walsh operation is needed in whole process,the acquisition time can be shortened further.Additionally,only additive operation is involved,no complex and multiply operations are required,so it is featured by fast operation speed,fewer occupied resource and simpler implementation. |
| Key words: spread spectrum communication,pseudocode acquisition,walsh transform,shift register |
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