The performance and implementation of PRACH(physical random access channel) acquisition in WCDMA system is investigated in this paper. The analysis shows that the conventional methods are not satisfying. Thus we proposed the quasi-matched filter acquisition scheme of PRACH preamble which based on fast Hadamard transform. And we implement this method by hardware in the practical WCDMA field try system. The simulation and test results show that the proposed scheme achieves the following performance: the detection probability with E{sub}b/N{sub}0 = 7 db does not less than 95%, and the mean acquisition time is less than 1.33 ms.
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机译：本文研究了WCDMA系统中PRACH（物理随机接入信道）采集的性能和实施。分析表明，传统方法不满足。因此，我们提出了基于快速Hadamard变换的Prach前导码的准匹配滤波器采集方案。并且我们通过实际WCDMA字段尝试系统中的硬件实现此方法。仿真和测试结果表明，该方案实现了以下性能：e {sub} b / n {sub} 0 = 7 dB的检测概率不小于95％，平均采集时间小于1.33 ms 。
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