| 摘要: |
| 研究了一种适合软件无线电的符号定时估计算法,该算法通过并行方法估计线性和非线性调制方式的符号定时。计算机仿真结果表明,通过设置观测时间间隔数和并行估计样本值的个数,算法可以满足多种调制方式对符号定时估计指标的要求,在误比特率为10-5时,相对于理想的相干解调性能,信噪比最大损失0. 5dB。算法全数字实现,复杂度适中,适合于软件无线电系统中对多种调制方式条件下符号定时估计的需要。 |
| 关键词: 软件无线电 符号定时 估计算法 计算机仿真 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目:国家预研基金 |
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| An Algorithm for Symbol Timing Estimation in Software Radio |
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| Abstract: |
| An algorithm of symbol timing estimation in software radio is researched, which estimates the symbol timing of linear and nonlinear modulation by the parallel estimation. Simulation results show that choosing right observation interval can get accurate result for different constellation and when bit error rate(BER) is 10~ -5 , the maximum loss of signal to noise ratio (SNR)is 0.5dB. Because of its all-digital realization and moderate complexity, the algorithm is suitable for the software radio system application. |
| Key words: Software radio,Symbol timing,Estimation algorithm,Simulation |
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