Design and implementation of synchronization and AGC for OFDM-based WLAN receivers
Design and implementation of synchronization and AGC for OFDM-based WLAN receivers
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DOI：
10.1109/tce.2004.1362493
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发表时间：
2004-11
影响因子：
4.3
通讯作者：
V. Jiménez;M.J.F.-G. Garcia;F.J.G. Serrano;A. G. Armada
中科院分区：
文献类型：
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作者：
V. Jiménez;M.J.F.-G. Garcia;F.J.G. Serrano;A. G. Armada
在基于 OFDM 的高速 WLAN 系统中，接收机端高效执行多项任务变得至关重要，例如自动增益控制、时间和频率同步以及偏移跟踪。本文讨论了这些算法实现的定点约束和精度要求。此外，还获得了用于时间和频率同步子块的实际实现的完整阈值集。此外，提出了一种减轻粗略采集后剩余频率偏移的技术，在性能和复杂性之间取得了良好的权衡。最后，我们建议实施一个简单有效的自动增益控制程序。
An efficient implementation of several tasks at the receiver becomes crucial in OFDM-based high-speed WLAN systems, such as automatic gain control, time and frequency synchronization, and offset tracking. This paper deals with fixed point constraints and accuracy requirements for implementation of those algorithms. Also, a complete set of thresholds for the practical implementation of time and frequency synchronization sub-blocks is obtained. Moreover, a technique to mitigate the remaining frequency offset after coarse acquisition is proposed, yielding a good trade-off between performance and complexity. Finally, we propose the implementation of a simple and effective automatic gain control procedure.