An LDPC-COFDM based High Speed Mobile Wireless Communication System

Abstract

Coded Orthogonal Frequency Division Multiplexing (COFDM) is very well matched to the terrestrial channel, being able to cope with severe multi-path and the presence of co-channel narrowband interference. This paper presents an image and video transmission scheme based on COFDM for high speed mobile wireless communication system in which a good Rate-Compatible Low-Density Parity-Check codes structure is applied, this structure can provide a large range of supporting rates, and provide very good error performance, low decoding latency and low computational complexity at the decoder. The test experiment was made in television live transmitting to validate the designed system. The results show that our COFDM-based mobile wireless digital multimedia broadcasting system can transmit high definition image and video when it being equipped for 486Kilometre/Hour's high speed rail, The Channel Bit Error Rate <2.0E-4 and Carrier to noise ratio(C/N) >30dB when the output power at 30dBm.