关于FER,RBER,BER的定义

handel

衡量接收机的灵敏度主要有FER,RBER,BER，这三个参数，
谁知道这三个参数的定义吗？

cubain

<P>BER         Bit Error Rate</P><P>RBER      Residue Bit Error Rate </P><P>FER         Frame Error Rate</P>[br]<p align=right><font color=red>+3 RD币</font></p>

haofntya

FER (frame erasure rate); It is the percentage of erased frames compared to the total
number of frames sent during an observation period
RBER (residual bit error rate); When frames are erased, only the BER of the remaining
frames is measured. This parameter RBER defines this measurement
BER is a ratio of bits received erroneously versus total number of bits received. It is measured
as follows.[br]<p align=right><font color=red>+3 RD币</font></p>

yellowtoot

<P>BER 不使用擦除功能时, 错的/总的; RBER 擦除后, 剩下的BIT中,错的/总的;</P><P>对吗?</P><P>关于FER, 我还一直以为是,只要一帧中错一个bit,就算这一帧为错呢.</P><P>原来是擦除的帧啊, 那请问,一帧错多少个bit才进行擦除啊?</P>[br]<p align=right><font color=red>+3 RD币</font></p>

ayuyu

RBER      Residue Bit Error Rate
这个RBER有什么意义？请教！

hust2000ljs

<P>同意4楼的说法，所以测试FER的结果要劣于BER的</P>

haofntya

GSM11.10上的定义：
1) Frame Erasure Ratio (FER)
A frame is defined as erased if the error detection functions in the receiver, operating in accordance with
GSM 05.03, indicate an error (BFI = 1). For full rate or half rate speech this is the result of the 3 bit cyclic
redundancy check (CRC) as well as other processing functions that cause a Bad Frame Indication (BFI). For
signalling channels it is the result of the FIRE code or any other block code used. For data traffic FER is not
defined.
2) Residual Bit Error Ratio (RBER)
The Residual Bit Error Ratio is defined as the Bit Error Ratio (BER) in frames which have not been declared as
erased.
3) Bit Error Ratio (BER)
The Bit Error Ratio is defined as the ratio of the bits wrongly received to all data bits sent.[br]<p align=right><font color=red>+5 RD币</font></p>

yellowtoot

<P>读起来, 好象就是错一个bit,就算整个帧出错,然后就擦除啦</P>

haofntya

<P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-outline-level: 1" align=left>翻译版的</P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-outline-level: 1" align=left>仔细读读，显然不是黄牙兄说的意思啦</P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-outline-level: 1" align=left>4.3.2  接收机<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left; mso-outline-level: 1" align=left>差错定义<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left; mso-outline-level: 1" align=left>a.  帧擦除率(FER)：将RX中误差检测功能指示出的差错帧定义为擦除帧，擦除帧数与总帧数之比定义为帧擦除率。<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-outline-level: 1" align=left>    b.  残余比特误码率(RBER)：RBER定义为未擦除帧中的比特误码率。<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-outline-level: 1" align=left>    c.  比特误码率(BER)：BER是指误码比特与发送的所有数据比特之比。<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left; mso-outline-level: 1" align=left>4.3.2.1  坏帧指示性能    <p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left" align=left>    全速率话音信道、半速率话音信道收信机的坏帧指示（BFI）性能就是测量收信机在DTX操作条件下的有效性。它包括了TCH/FS、TCH/HS信道中3比特循环冗余校验（CRC）及DTX操作有关的其他处理功能的影响。对BFI的测量是基于对输入为随机数据调制的载频上全速率话音信道（TCH/FS）、半速率话音信道（TCH/HS）中对没有被检测出的坏帧数目进行计数来实现的。<p></p></P><P 0cm 0cm 0pt; TEXT-ALIGN: left" align=left>    当样本数等于规定的最小样本数时，若未检测出的BFI不超出以下给定的错误率极限时，则BFI性能可以接受。<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left" align=left>测试错误率极限：0.041%<p></p></P><P 0cm 0cm 0pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left" align=left>最小样本数：492000（不包括SID帧）</P>

yellowtoot

<P>不好意思, 我还是看不出来</P><P>请问擦除这个坏帧,到底在这一帧中是要错多少个bit啊???</P>

ayuyu

如果有3 bit cyclic redundancy check (CRC)错误则该帧为坏振。[br]<p align=right><font color=red>+3 RD币</font></p>

cuijw

<P>For full rate or half rate speech this is the result of the 3 bit cyclic
redundancy check (CRC) as well as other processing functions that cause a Bad Frame Indication (BFI). For
signalling channels it is the result of the FIRE code or any other block code used</P>
<P>楼上所说的3bit CRC是指Ia类的CRC吗？那就是说语音信道来说BFI实际上主要是反映Ia类的情况了？</P>
<P>另，上面还提到有其他情况，看不明白，能再解释一下吗？</P>
<P>先谢了</P>