【摘要】 基于G3-PLC OFDM系统,利用系统中的Preamble序列,通过接收端的时域信号估计信噪比.此算法可以很好地适应于时间和频域选择性信道,满足工程上的需要.更多还原

【Abstract】 Orthogonal Frequency Division Multiplexing(OFDM) has increasingly become a very crucial technology in the field of communication. One of the crucial parameters in OFDM system is the signal-tonoise ratio(SNR). It has many uses in OFDM system, such as channel estimation, adaptive decoding and time synchronization. Based on the G3-PLC system, using the Preamble sequences, by accepting the timedomain signal estimated SNR. This algorithm can well apply to time and frequency selective channel, can well meet the needs of the engineering.更多还原