| 摘要: |
| 主要讨论了量化比特数和取样间隔对数字匹配滤波器（DMF）解扩电路性能的影响，通过直扩系统（DSSS）的仿真结果表明；DMF的量化比特数取3时，量化误差可忽略不计（近似为无穷量化结果）；而在低抽样率下依靠DMF的样值序列前端处理（FEP）可以使系统误码率达到高抽样率的效果，而硬件代价却大大减小。 |
| 关键词: 直扩系统 数字匹配滤波器 设计仿真 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目: |
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| Simulation for Designing DMF of DSSS |
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| Abstract: |
| In this paper, the effects of quantizing bit number and sampling interval on the performance of DMF despreading circuit is investigated. It is found through simulation for DSSS that the result of 3-bit quantization is very near to the infinite quantization.In addition,the system BER of low sampling rate can be improved by the front-end processor(FEP)operation to be the same as that of high sampling rate while cost of hardware is largely reduced. |
| Key words: DSSS,Digital matched filter,Quantizing bit number,Sampling interval,Matlab simulation |
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