A channel estimation method for wireless communication in HPLC&RF dual mode system

With application of high-speed power line carrier communication (HPLC), some problems are emerging such as network outliers, low success rate of power outage reporting and short single hop communication distance. Wireless communication (RF) can effectively solve these problems and thus become an effective complement to HPLC. For OFDM based wireless communication in HPLC&RF dual mode system, a channel estimation method is proposed. Compared with LTF-based and pilot-based channel estimation methods applicable to cases with few and multiple physical layer load symbols respectively, the proposed method can be applied in all cases. When the number of symbols is small, it outperforms pilot-based method by 2~3 dB and is still better than LTF-based method. When the number of symbols is large, it outperforms LTF-based method by 2~5 dB and still better than pilot-based method.