Phase rotating index is represented by the other n-l states, it also calls phase control code. After IFFT, the result data are added to original data symbols.
其余n-l个状态用来表示相位旋转因子索引,即相位控制码序列,经IFFT运算后再与数据符号相加。
参考来源 - OFDM系统峰值功率控制及优化算法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
利用这种控制码，波束指向精度提高了一个数量级。
The optimum phase control code for beam pointing increases accuracy of beam pointing obviously.
报文信息的鉴别认证可采用差错控制码、报文鉴别码与数字签名进行。
Message information may be authenticated with error-control code, message authenticated code and digital signature.
通常需要采用差错控制码来检测和纠正由信道失真引起的信息传输错误。
Usually there is need to use error control coding to detect and correct those transmission errors caused by signal distortion.
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