LDPC Coded TDS-OFDM for PLC Systems  

作　　者：戴凌龙 符剑 王军 

机构地区：[1]State Key Laboratory on Microwave and Digital Communications,Department of Electronic Engineering,Tsinghua University

出　　处：《Tsinghua Science and Technology》2010年第3期312-318,共7页清华大学学报（自然科学版（英文版）

基　　金：Supported by the National High-Tech Research and Development (863) Program of China (No. 2007AA01Z2B6)

摘　　要：Powerline communications （PLC） have drawn great interest in recent years. However, most PLC standards such as HomePlug AV use the cyclic-prefix OFDM （CP-OFDM） technology. This paper presents a broadband PLC system using low density parity check （LDPC） coded time domain synchronous OFDM （TDS-OFDM）, whose spectrum efficiency is about 10% higher than that of CP-OFDM. With the same bandwidth and the ability to combat the time delay spread as HomePlug AV, this system can provide a maximum throughput of 199.7 Mbps physical layer data rate. Simulations over the measured practical powerline channel in Beijing, China, show that LDPC in the TDS-OFDM system dramatically improves the bit error rate performance, and verify the feasibility and performance of the TDS-OFDM technology for PLC systems.Powerline communications （PLC） have drawn great interest in recent years. However, most PLC standards such as HomePlug AV use the cyclic-prefix OFDM （CP-OFDM） technology. This paper presents a broadband PLC system using low density parity check （LDPC） coded time domain synchronous OFDM （TDS-OFDM）, whose spectrum efficiency is about 10% higher than that of CP-OFDM. With the same bandwidth and the ability to combat the time delay spread as HomePlug AV, this system can provide a maximum throughput of 199.7 Mbps physical layer data rate. Simulations over the measured practical powerline channel in Beijing, China, show that LDPC in the TDS-OFDM system dramatically improves the bit error rate performance, and verify the feasibility and performance of the TDS-OFDM technology for PLC systems.

关 键 词：powerline communications （PLC） time domain synchronous OFDM （TDS-OFDM） low density parity check （LDPC） HomePlug AV channel measurement 

分 类 号：TN919.3[电子电信—通信与信息系统]