公开(公告)号：US3407418A

公开(公告)日：1968-10-29

申请号：US57571466

申请日：1966-08-29

Applicant: JAMES L. MAY ,  JAMES A. STEPHENS JR.

Inventor： MAY JAMES L ,  BELL DRIVE ,  STEPHENS JR JAMES A

IPC: B63B22/12

CPC classification number: B63B22/12 ,  B63B2209/06

公开(公告)号：US20140254636A1

公开(公告)日：2014-09-11

申请号：US13916146

申请日：2013-06-12

Applicant: James A. Stephens ,  Dominique Delbecq ,  Daniel M. Perrine

Inventor： James A. Stephens ,  Dominique Delbecq ,  Daniel M. Perrine

IPC: H04B1/709

CPC classification number: H04B1/709

Abstract: Methods and receiver circuits are provided for correlating an incoming signal with PN codes. An embodiment of the method includes receiving I/Q baseband samples in the I/Q domain; converting the I/Q baseband samples to phase baseband samples; generating a pseudonoise (PN) code; converting the PN code to PN phase data; performing a correlation on the phase baseband samples using the PN phase data to generate correlated I/Q values; performing an adding operation on the correlated I/Q values to generate demodulated I/Q values; converting the demodulated I/Q values into demodulated phase values; performing a frequency correction operation on the demodulated phase values to generate frequency correction data; converting the demodulated I/Q values into demodulated magnitude values; and performing signal decoding and synchronization on the magnitude values to generate output data. The operation of performing correlation on the phase baseband samples using the PN phase data is accomplished using scalar subtraction.

Abstract translation: 提供了用于将输入信号与PN码相关联的方法和接收机电路。 该方法的实施例包括：在I / Q域中接收I / Q基带采样; 将I / Q基带采样转换为相位基带采样; 产生伪噪声（PN）码; 将PN码转换成PN相数据; 使用PN相位数据对相位基带采样进行相关，以产生相关的I / Q值; 对相关的I / Q值执行相加操作以产生解调的I / Q值; 将解调的I / Q值转换为解调相位值; 对解调的相位值执行频率校正操作以产生频率校正数据; 将解调的I / Q值转换为解调幅度值; 并对幅度值执行信号解码和同步以产生输出数据。 使用标准减法来实现使用PN相位数据对相位基带采样进行相关的操作。

公开(公告)号：US5383185A

公开(公告)日：1995-01-17

申请号：US124418

申请日：1993-09-20

Applicant: Peter J. Armbruster ,  James A. Stephens

Inventor： Peter J. Armbruster ,  James A. Stephens

IPC: G06F13/00 ,  G06F9/52 ,  G06F13/376 ,  G06F13/38 ,  G06F15/16 ,  G06F15/177 ,  H04L12/413 ,  H04L12/40

CPC classification number: H04L12/40013 ,  H04L12/413

Abstract: A method and apparatus for data collision detection and resolution in a multi-processor communication system. The system includes a plurality of processors coupled via a common bus. When it is required that one processor communicate with another processor, the first processor determines whether a data collision flag is set. The processor then checks a number of indicators to determine whether the identity of the transmitting processor is what it is expected to be. If a data collision is found, the processor waits a selective time before transmitting a message. The processor then repeats the data collision checking and transmitting the message to the other processor when no data collision is found. The time to wait is dependent upon the identity of the processor and is table driven.

Abstract translation: 一种用于多处理器通信系统中的数据冲突检测和分辨的方法和装置。 该系统包括通过公共总线耦合的多个处理器。 当需要一个处理器与另一处理器通信时，第一处理器确定是否设置数据冲突标志。 然后，处理器检查多个指示符，以确定发送处理器的身份是否是预期的。 如果发现数据冲突，则处理器在发送消息之前等待选择时间。 然后，当没有发现数据冲突时，处理器重复数据冲突检查并将消息发送到另一个处理器。 等待的时间取决于处理器的身份，并且是表驱动的。