首页> 外国专利> Blind carrier frequency offset estimator based on single-OFDM-symbol PN ranging code in multi-user OFDMA uplink

Blind carrier frequency offset estimator based on single-OFDM-symbol PN ranging code in multi-user OFDMA uplink

机译:多用户OFDMA上行链路中基于单OFDM符号PN测距码的盲载频偏估计器

摘要

A blind carrier frequency offset estimator is based on a single-OFDM-symbol training sequence in multi-user OFDMA uplink. Through multiple access interference modeling and analysis, a virtual user is employed that occupies the all null sub-carriers. By minimizing the energy leakage on the virtual user in term of tentative frequency offsets, the estimator can approach the real frequency offset. The estimator performs only on frequency-domain, simplifies interference calculations, and lowers the rank of the matrix. An iterative computation method is used to approach the real frequency offset.
机译:盲载波频率偏移估计器基于多用户OFDMA上行链路中的单个OFDM符号训练序列。通过多址干扰建模和分析,使用了一个虚拟用户,该虚拟用户占据了所有空子载波。通过在暂定频率偏移方面使虚拟用户的能量泄漏最小化,估算器可以逼近实际频率偏移。估计器仅在频域上执行,简化了干扰计算,并降低了矩阵的秩。迭代计算方法用于逼近真实频率偏移。

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