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公开(公告)号：US4776012A
公开(公告)日：1988-10-04
申请号：US39340
申请日：1987-04-17
IPC分类号： H04B1/7075 , H04L9/04
CPC分类号： H04B1/70756
摘要： The present invention is concerned with an apparatus and a method of jumping a composite PN code from a current phase position to a desired predetermined phase position so as to enhance acquisition of a composite PN code. The apparatus includes a plurality of individual PN code generators which are connected to a code combiner to produce a composite PN code. Each of the individual PN code generators is driven by its own timing gate for supplying synchronized clock pulses to its own PN code generator. A master clock is connected to a timing gate before being connected to the individual PN code generators. An inhibit input at each of the individual timing gates is provided so that the individual PN generators may be inhibited a predetermined number of clock pulses which causes the PN code generated to be inhibited and has the effect of jumping the PN code a desired number of phase positions.
摘要翻译： 本发明涉及将复合PN码从当前相位位置跳转到期望的预定相位位置的装置和方法，以便增强复合PN码的采集。 该装置包括多个单独的PN码发生器，其连接到码组合器以产生复合PN码。 每个PN码发生器由其自己的定时门驱动，用于向其自身的PN码发生器提供同步的时钟脉冲。 在连接到各个PN码发生器之前，主时钟连接到定时门。 提供每个各个定时门处的禁止输入，使得各个PN发生器可以被禁止预定数量的时钟脉冲，这导致产生的PN码被禁止并且具有跳转PN码所需数量的相位的效果 职位
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公开(公告)号：US4397034A
公开(公告)日：1983-08-02
申请号：US247686
申请日：1981-03-26
IPC分类号： H04K1/00
CPC分类号： H04K1/00
摘要： A system for transmitting desired information is provided which has a very low probability of being intercepted. The system combines a well known narrow bandwidth directional antenna for limiting the interception of the main beam information signal with a novel random noise generated signal which guarantees that the sidelobe signals which also contain the desired information cannot be distinguished as information signals.
摘要翻译： 提供了一种用于发送所需信息的系统，其具有非常低的拦截概率。 该系统组合了众所周知的窄带宽定向天线，用于限制主波束信息信号的截取与新颖的随机噪声产生信号，这保证了还包含所需信息的旁瓣信号不能被区分为信息信号。
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