通信人家园
标题:
[求助]什么是误块率
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时间:
2007-1-6 13:30
作者:
南极星
标题:
[求助]什么是误块率
请高手回答我这些问题，谢谢
1.什么是第一导频强度
2.什么是信号源基站底噪和抬升
3.BLER目标值
4.起呼成功率
什么是同频覆盖
时间:
2007-1-6 13:45
作者:
rafequ
看书啊
网上差啊
时间:
2007-4-10 11:22
作者:
yulei
<p class="MsoNormalIndent" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0in 0in 0pt; TEXT-ALIGN: justify;"><font size="3"><font face="Times New Roman">BER</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">和</span><font face="Times New Roman">BLER</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">（</span><font face="Times New Roman">Block Error Ratio</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">）测试原理基本相同，都可以用上面提到的基带</span><font face="Times New Roman">BER</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">和环回</span><font face="Times New Roman">BER</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">测试方法，但是它们的用途和测量点不同。</span></font></p><p class="MsoNormalIndent" style="TEXT-JUSTIFY: inter-ideograph; MARGIN: 0in 0in 0pt; TEXT-ALIGN: justify;"><font size="3"><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">在用途上，</span><font face="Times New Roman">BER</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">是用来衡量接收机特性的指标，而</span><font face="Times New Roman">BLER</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">是用来衡量系统性能测试的。对于</span><font face="Times New Roman">TD-SCDMA</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">系统来说，</span><font face="Times New Roman">BLER</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">测试对于衡量系统性能更有用，然而</span><font face="Times New Roman">BER</font><span lang="ZH-CN" style="FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman";">却被用于评估射频接收机指标和仿真参考测量信道</span><sup><font face="Times New Roman"><span lang="ZH-CN">
</span></font></sup></font></p><p><span lang="ZH-CN" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">在实现上，两者的测量都要经过解交织、速率匹配和维特比解码等一系列的信道解码过程，但是</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">BLER</span><span lang="ZH-CN" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">是在</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">CRC</span><span lang="ZH-CN" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">之后测量，每发生一个需要丢掉的误码块就记一个错误，而</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">BER</span><span lang="ZH-CN" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">是在</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">CRC</span><span lang="ZH-CN" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">之前测量，每发生一个比特错误就记一个错误。由此可见，</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">BLER</span><span lang="ZH-CN" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">不但测量信道解码后的数据块的错误，而且还检查</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">CRC</span><span lang="ZH-CN" style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: "Times New Roman"; mso-hansi-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">的错误。</span></p>
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