摘要
提出一种低复杂度的数字调幅广播调制方式——32DAPSK+OFDM.该方式能有效地降低数字广播接收机复杂度.首先给出30MHz以下频段(调幅广播波段)信道模型和基于OFDM数字调幅广播系统的等效基带模型,然后讨论32DAPSK+OFDM的调制、解调以及在白高斯信道的误比特性能。最后仿真32DAPSK+OFDM在调幅广播信道的误比特性能。
The time-domain DAPSK+OFDM is proposed for digital amplitude modulation broadcast (DAMB), which offers a low-complexity uncoded modulation scheme. First, the AM channel model below 30MHz is described, and the baseband model based on the OFDM system is shown. Next, the modulation, demodulation and BER performance of 32DAPSK4-OFDM are investigated in AWGN channel. Finally, the BER performance of 32DAPSK + OFDM is simulated in all the AM channels.
出处
《应用科学学报》
CAS
CSCD
2003年第2期182-186,共5页
Journal of Applied Sciences
基金
国家自然科学基金(60072013)
