feeling-矬
什么是
fsk
调制
fsk
调制是什么意思?
什么是
fsk
调制
?
fsk
调制是什么意思?
数字调频又称移频键控,简记为
FSK
,
它是载波频率随数字
信号而变化的一种调制方式。利用基带数字信号离散
取值特
点去键控载波频率以传递信息的一种数字调制技术。除具有
两个符号的二进制频移键控之外,尚有代表多个符号的多进
制频移键控,简称多频调制
。一种用多个载波频率承载数字
信息的调制类型。最常见的是用两个频率承载二进制
p>
1
和
0
的双频
p>
FSK
系统。
FSK
(频移键控)
,也称为移频调制和移频信号。
Frequency Shift Keying is a data signal
converted into a
specific frequency or
tone in order to transmit it over wire,
cable, optical fiber or wireless media
to a destination point.
频移键控是一个数据信号转换成特定
频率或音调,以便将其
转交超过电线,
电缆,
< br>光纤或无线媒介,
以一个目的地一点。
The history of FSK dates back to the
early 1900s, when
this technique was
discovered and then used to work
alongside teleprinters to transmit
messages by radio
(RTTY).
历史上
的
FSK
可以追溯到
20
世纪初叶,当这一技
术被发现,然后用并肩工作,
teleprinters
传递信息,由电
台(
rtty
)
。
But FSK, with some modifications, is
still
effective in many instances
including the digital world
where it is
commonly used in conjunction with computers
and low speed
modems.
但在
FSK
,作出一
些修改,但仍
然有效,在许多事例中,包括数位世界中,这是常用的结合
电脑和低速调制解调器。
In fact, the
contributions of FSK
are much more far
reaching.
事实上,在捐款的
FSK
< br>更为深
远。
For
example, the principle of FSK has laid the path to
the development of other similar
techniques such as the
Audio Frequency
Shift Keying (AFSK) and Multiple
Frequency Shift Keying (MFSK) just to
name a few.
举例来
说,
原
则上的
FSK
奠定了发展的路径其他类似技术,
如声频
移键控(
afsk
)及多频移键控(多进制频移键控)刚刚仅
举几例。
In Frequency Shift Keying, the
modulating signals shift the
output
frequency between predetermined levels.
在频移键
控,调制信号转移输出频率之间预定的水平。
Technically
FSK has two
classifications, the non-coherent and
coherent FSK.
技术上的
FSK
有两个分类,非相干和相干的
FSK
。
In non-coherent
FSK, the instantaneous frequency
is
shifted between two discrete values named mark and
space frequency,
respectively.
在非相干的
FSK
,
瞬时频率
是转移双方离散值命名为马克和空间频率
,
分别为。
On the