MOBILE MULTIMEDIA BROADCAST TRANSMISSION SYSTEM

摘要

A mobile multimedia broadcast transmission system is provided in the present invention, and includes: a Reed-Solomon (RS) coding and byte interleaving unit, a Low Density Parity Check (LDPC) coder, a bit interleaver, a constellation mapper, a frequency domain symbol generator, a scrambler, an Inverse Fast Fourier Transform (IFFT) converter, a time domain framer, and a transmitter. According to the technical solutions provided in the present invention, the system can provide mobile multimedia services of high quality for users in 6MHz operation bandwidth. Furthermore, optimization selections are performed on RS coding according to the operation bandwidth of the system, thereby selecting appropriate coding mode according to different channel conditions, accordingly, optimization is performed on the byte interleaver, thereby using reasonable interleaving parameters to perform byte interleaving. The technical solutions provided in the present invention reasonably set and allocate the continuous pilots, the discrete pilots and the data subcarriers of the system according to the actual bandwidth of the system, thereby reasonably setting the system overhead of the mobile multimedia broadcast transmission system to effectively utilize spectrum resources to transmit data.