difference n. 1.差异,差别。 2.不和,争论。 3.【数学】差,差额。 4.【逻辑学】特殊性。 There is no difference between them. 两者毫无差别。 the difference of jetsam from flotsam 弃货不同于浮货。 What difference can it make 不是一样吗? He is an artist with a difference. 他是别具风格的艺术家。 distinction without difference 无聊的区别。 make a difference 发生差别;使…有差别;(结果等)是重要的,有关系[影响] (One false step will make a great difference. 失之毫厘,谬以千里。 Don't let it make any difference. 没关系。 make a difference between A and B 使甲乙有别,对甲乙不一样)。 pay [meet] the difference 付差额金。 seek common ground while reserving differences 求同存异。 settle differences 调停。 split the difference 1. 折中,妥协。 2. 均分剩下的东西。 vt. 〔罕用语〕区别,使有差别。
The frequency difference sensitivity of the modulation mode and the ability to overcome distortion by limiting amplitude of the signal and to overcome interference also affect the performance , too . in this paper , the relationship between the ability to overcome interference and the modulation mode is discussed at first . then the characters in some aspects specif ' ed above of some common modulation mode such as mfsk mpsk ofdm are studied . on this base , some according solutions to the problem of the different frequency - hopping system are put forward . in the past half of this paper , the realization scheme , pcrforemance and improving measures of ofdm are studied 本文首先较详细地讨论了跳频抗干扰的能力与调制制度的关系,接着分别研究了几种常用调制方式( mfsk , mpsk , ofdm )上述几方面的性质,针对各跳频系统存在的问题提出了相应解决方案,在本论文后半部分重点讨论了ofdm跳频系统的实现方案、性能及改进措施。