本文研究的是OFDM系统中的信噪比估计算法．并利用DSP芯片．通过AD6640和AD6620组成中频接收平台，将其应用到实际的OFDM传输系统中。

This paper is the study of OFDM SNR estimation algorithm system, using DSP chips and IF receiver platform composed by AD6640 and AD6620 to apply it in actual OFDM transmission system.

youdao

对于MPSK信号而言，信噪比的估计可以直接转化成对信号模的估计问题。

For MPSK signals, the signal-to-noise ratio (SNR) estimation can be directly transformed into the signal module estimation.

youdao

作为MAP译码算法的必要参数，信噪比通常通过信道估计单元得到。

As a necessary input parameter for MAP decoding algorithm, SNR was normally obtained from the channel estimation unit.

youdao