【摘要】 根据不同的m-W复合序列具有频谱跳变的特点,提出了一种在直扩通信中对窄带干扰进行规避的方法。该方法通过改变m序列、Walsh序列的周期和Walsh函数序列的序数可以使直扩信号具有频谱可控的特性,从而使窄带干扰所在频段的信号能量较少,降低干扰对信号的影响。仿真结果表明,对于单频和窄带干扰,在信噪比一定的情况下,采用规避方式的误码率可比常规直扩方式提高1至2个数量级。更多还原

【Abstract】 A method to evade narrow-band interference in direct sequence spread spectrum(DSSS) communication is introduced by using the frequency-hopping characteristic of different m-Walsh composite sequences.The proposed method possesses the DSSS signals of controllable frequency spectrum by changing the period of m and Walsh seguences and the sequence number of the Walsh function,thus making the frequency band where narrow band interference lies be less signal energy and reducing the influence of interference on signals.Simulation results show that the bit error rate of the avoidance method can raise 1 to 2 order of magnitude compared with DSSS for combatting against single frequency interference and narrow band interference.更多还原