求翻译：3）频率规划简单。用户按不同的序列码区分，所以，相同CDMA载波可在相邻的小区内使用，网络规划灵活，扩展简单。虽然CDMA系统频率规划简单，但CDMA 系统存在着PN短码的规划，并 且PN短码的规划相较频率规划并不一定更简单。总体来说 CDMA的规划并不简单。相反，较之GSM系统要更为复杂。是什么意思？

3) the frequency planning. Users to distinguish between different serial number, so the same cdma carrier in the adjacent district, flexible and scalable network planning. Cdma systems frequency planning is simple, but cdma pn code planning and pn code of Planning compared to frequency planning is n

3) frequency planning simple. Users of the serial number on a different case, and therefore, the same CDMA carrier can be in the next small area, and the network planning flexible, easy to extend. Although CDMA system frequency planning simple, but there is a PN CDMA system short code, and the plann

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3) frequency planning simple. Users in different sequence code is case sensitive, so the same CDMA carrier can be used in the adjacent community, network planning, flexible, simple extension. While CDMA systems frequency planning simple, but of short PN codes in CDMA system planning, and planning of

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