中文摘要：

在非连续正交频分复用（NC—OFDM）系统中导频位置设计是一种组合优化问题，因此可以采用离散粒子群优化算法设计导频序列。以信道均方误差（MSE）最小为目标，使导频设计问题转化为一类确定性的数学模型，并构造了求解该问题的一种离散粒子群算法。仿真结果表明，该方法能够获得良好的信道MSE性能和误比特率（BER）性能。

英文摘要：

We can design pilot tones with particle swarm optimization for the reason that pilot position design is a kind of combinatorial optimization in the NC-OFDM system. The problem of pilot design was converted into a deterministic mathematic model and was solved by discrete swarm optimization algorithm. Simulation shows this method could achieve good MSE performance and bitter error rate（BER） performance.