论文部分内容阅读
一、引言呼叫系统是多址通信中的一个组成部分。根据具体情况,可用不同的方式予以实现。在码分多址通信中,是根据信号液形的不同来区分地址的。本文介绍的是用于码分话的拨号自动回铃系统。在码分多址通信中,处于对通话时的通话双方都连续发送对方用户站的地址码所调的裁例如: 甲站的地址码为PN_1 地址号码为 020 乙站的地址码为PN_2 地址号码为 040 丙站的地址码为PN_3 地址号码为 230 若乙站和丙站处于通话工作状态,则乙站就连续发射用丙站地址码PN_3调制的载波,丙站就锁定在PN_3上;同理,丙站也连续发射用乙站地址码PN_2所调制的载波,乙站的延迟锁
I. INTRODUCTION Calling system is an integral part of multiple access communication. Depending on the circumstances, this may be done in different ways. In code division multiple access communication, the address is distinguished according to the signal liquid form. This article describes the dial-up for automatic answering system. In code division multiple access communication, the two parties who are on the call continuously send the address code of the opposite user station. For example, the address code of station A is PN_1, the address number is 020, the address code of station B is PN_2, and the address number The address code of 040 station A is PN_3, the address number is 230. If station B and station C are in call working state, station B continuously transmits the carrier modulated by station address code PN_3 and station C locks on PN_3. Similarly , Station C also continuously launches the carrier modulated by Node B address code PN_2 and delay lock of Station B.