A novel preamble design using LDM

作者：Huang, Yihang; He, Dazhi^*; Zhao, Yue; Xu, Yin; Zhang, Wenjun

来源：11th IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), 2016-06-01 To 2016-06-03.

DOI：10.1109/BMSB.2016.7521955

• preamble
• LDM
• synchronization
• parameter transmission

In this paper, a layered preamble denoted as LP1 is proposed based on Layer Division Multiplex (LDM). The preamble is composed of two OFDM symbols. The first symbol is fixed and used for timing and frequency synchronization. The second symbol is a combination of two layers which both convey system parameters associated with system structure. Because of good cross-correlation of PN sequences with different generator polynomials, the interference of each layer can be ignored. Timing synchronization and fractional frequency offset (FFO) estimation are done simultaneously in the time domain using guard interval (GI). An IFFT method is proposed to implement integer frequency offset (IFO) estimation and phase parameter generation under fading channels. Correlation method is adopted for signaling demodulation in frequency domain after phase compensation. Simulation results show that the proposed preamble can achieve more flexibility and greater robustness than P1 in DVB-T2 typical channel with low SNR.

• 出版日期2016
• 单位上海交通大学