NC-OFDM系统的导频设计

Pilot Design for NC-OFDM System

在NC-OFDM系统中,次用户不能使用主用户占用的频带,这导致了次用户频谱的非连续性。因此,对于NCOFDM系统,传统的等间隔等功率的导频设计方法不再适用。在基于信道均方误差(MSE)的准则下,提出了一种适用于NC-OFDM系统的导频设计方法。它对原有的设计方法进行改进,降低了运算复杂度,获得了更好的MSE性能和误比特率(BER)性能,仿真结果证明了该结论。

In non-contiguous orthogonal frequency-division multiplexing（NC-OFDM） system, the secondary users can＇ t use the frequency band already occupied by the primary users, which leads to non-contiguous frequency of the secondary users. Therefore, traditional pilot design of equal power and equal intervals is not available for NC- OFDM system. Now, the previous design is improved, decreasing the computing complexity and obtaining better MSE and BER performance. This design proves better by simulation.