Sampling Jitter Cancellation in Direct-Sampling Radio
Sampling Jitter Cancellation in Direct-Sampling Radio
复制标题
直接采样无线电中的采样抖动消除
DOI：
10.1109/wcnc.2010.5506638
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Valkama
中科院分区：
文献类型：
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作者：
Ville Syrjälä;M. Valkama
本文解决了直接射频子采样型无线电中的采样抖动估计和消除任务。所提出的抖动估计方法基于仔细地向采样器输入处的接收信号注入或叠加额外的已知参考信号。然后设计并应用适当的数字信号处理方法来根据所获得的抖动样本来估计采样抖动实现。使用这些抖动估计，结合适当的抖动建模，可以有效地从实际接收的信号中消除抖动影响。还使用 3GPP LTE 类型多载波信号的计算机模拟来对整体估计消除方案进行仔细的性能分析，并假设 RF 子采样阶段之前的 RF 滤波量不同。在性能模拟中，考虑了加性高斯白噪声和扩展的 ITU-R 车辆 A 多径无线电信道类型。
This paper addresses the sampling jitter estimation and cancellation task in direct RF sub-sampling type radios. The proposed jitter estimation method is based on carefully injecting or superimposing an additional known reference signal to the received signal at the sampler input. Proper digital signal processing methods are then devised and applied to estimate the sampling jitter realizations from the obtained jittered samples. Using these jitter estimates, combined with proper jitter modelling, the jitter effects can then be efficiently removed from the actual received signal. Careful performance analysis of the overall estimation-cancellation scheme is also carried out using computer simulations with 3GPP LTE type multicarrier signals, assuming also different amounts of RF filtering prior to RF sub-sampling stage. In the performance simulations, both additive white Gaussian noise and extended ITU-R Vehicular A multipath radio channel types are considered.