与同步调用类似，InvalidSymbolException 指示 请求已到达服务提供程序，该提供程序抛出业务异常，指示符号无效。
Similar to a synchronous invocation, InvalidSymbolException indicates that the request has reached the service provider, which has thrown a business exception stating that the symbol is invalid.
OFDM系统存在对数据符号同步和载波频率偏移极为敏感的问题。
The OFDM is sensitive to the synchronization of the OFDM symbol and the carriers' frequency excursion.
提出了一种新的无线信道下基于循环前缀的正交频分复用系统符号定时同步算法。
A symbol timing algorithm for orthogonal frequency division multiplexing (OFDM) systems with the cyclic prefix under wireless channels is proposed.
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