摘要
为了提高可见光通信系统的整体性能和实现带宽资源的有效利用,针对可见光无线信道的频域选择性特性,提出在可见光通信系统中采用自适应OFDM调制方式的方案,即根据信道状况的优劣自适应地选择恰当的调制、解调方式。仿真结果表明,在相同的信噪比(SNR)下,该方案所采用的自适应OFDM系统比传统的OFDM系统有更低的误比特率(BER),同时所提出的最佳载波选择准则可以提高系统的整个吞吐量。
For improving the whole performance of VLC system and utilizing the frequency band fully,aiming at the channel characteristics of frequency domain selectivity,this paper gave an adaptive orthogonal frequency division multiplexing （OFDM） proposal that is choosing the appropriate modulation mode according to the quality of each sub-channel. From the simulation results,we can find that BER of the adaptive OFDM system is lower than the conventional ones under the same SNR,and in the same time,the criterion which we adopted as for selecting the ＇best subcarriers＇ can improve the whole system throughput.
出处
《长春理工大学学报（自然科学版）》
2010年第1期70-73,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
