mfsk meaning in English
多进制频率键控
多进制数字频率调制
多进制数字频率键控
最小频移键控
Examples
- Long - range underwater acoustic information transmission through mfsk modulation
基于多进制频移键控调制的水声远程信息传输技术研究 - It is very difficult to design a high - quality underwater acoustic data transmission system . in our study , we use frequency diversity and frequency - hopped technology . this method is an effective solution for the isi and signal fading
该方法起到保证mfsk传输系统使用频率中文摘要统使雨频率分集技术能得以有效的实现；并可用于提高mfsk信号检测精度，因此在频率信号检测中它有广泛应用意义，它是本文重要创新之处。 - With this tech , we design a high - efficient & robust mfsk data transmission system . but in frequency diversity of mfsk system , it is very difficult to tell which diversity is the correct carrier frequency . now we use the temporary phase swift ( ips ) method to solve the difficulty
在2000年，美国海军成功通过水声链路并接入internet网络发送e mail ，这具有重要的战略意义；从科学技术发展的角度来看是喜讯，但对我们这样一个海洋大国来说，更现实的意义在于鞭策自己的科研工作。 - 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。 - This thesis analyzed the error performance of mfsk and mpsk modulator in hf with optimal receiver , studied the shortcoming and strongpoint of several typical short - wave data transmission systems and their performance over fading and intersymbol interference channels . the theory and key technical of adaptive modem is discussed . in the last , an efficient modulation scheme - block coded modulation is introduced into hf radio systems to improve the efficiency of hf data transmission , this paper also proposes a hf data transmission system scheme composed of a block coded modulator and a decision feedback type adaptive equalizer
本文在对短波数传两种常见调制方式fsk及psk最佳解调性能分析的基础上，讨论了几种采用典型调制技术的短波数传系统(如时频调制、多进制频移键控慢跳频、 chess系统)原理、优缺点以及抗衰落和抗符号间干扰的性能；分析了自适应串行数传系统抗短波信道衰落和多径干扰的原理、关键技术；在本文的最后引入一种有望解决短波数传系统低效率状况的调制方式bcm -分组编码调制，给出了一个采用bcm技术与自适应均衡技术相结合的短波数传系统方案，并通过计算机模拟进行了初部验证。