[求助]关于复帧同步

xuwanfu

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  <p class="TAH"><span lang="EN-GB">Name<op></op></span></p>
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  <p class="TAH"><span lang="EN-GB">hase quadruple<op></op></span></p>
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  <p class="TAH"><span lang="EN-GB">Meaning<op></op></span></p>
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  <p class="TAL"><span lang="EN-GB">S1<op></op></span></p>
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  <p class="TAL"><span lang="EN-GB">135, 45, 225, 135<op></op></span></p>
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  <p class="TAL"><span lang="EN-GB">There is a P-CCPCH in the next 4 sub-frames<op></op></span></p>
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  <p class="TAL"><span lang="EN-GB">S2<op></op></span></p>
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  <p class="TAL"><span lang="EN-GB">315, 225, 315, 45<op></op></span></p>
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  <p class="TAL"><span lang="EN-GB">There is no P-CCPCH in the next 4 sub-frames <op></op></span></p>
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<br/>请问什么样情况下子帧中才没有P-CCPCH？复帧同步的核心是什么？<br/>