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COMMON PHASE ERROR (CPE) COMPENSATION FOR FREQUENCY DIVISION MULTIPLEX (FDM) SYMBOLS IN WIRELESS COMMUNICATION SYSTEMS
COMMON PHASE ERROR (CPE) COMPENSATION FOR FREQUENCY DIVISION MULTIPLEX (FDM) SYMBOLS IN WIRELESS COMMUNICATION SYSTEMS
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机译:无线通信系统中频分复用(FDM)符号的通用相位误差(CPE)补偿
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摘要
A wireless device receives a frequency division multiplexed (FDM) symbol of constituent equalized FDM data subcarriers. A modulation scheme constellation diagram is subdivided into two or more regions. For each of the regions, a subset of the subcarriers that fall within the region are extracted and a respective region-specific CPE estimate is computed thereon. The respective region-specific CPE estimates are averaged to produce an overall CPE estimate used to compensate the subcarriers. Furthermore, a first CPE estimate is computed using pilot symbols embedded in a first received FDM symbol and is used to compensate the subcarriers. A following second FDM symbol that has no embedded pilot symbols is compensated using the first CPE estimate, and a second CPE estimate is computed using a blind estimation method on the second FDM symbol compensated subcarriers, which are compensated using the second CPE estimate.
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