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    • 1. 发明授权
    • Method and device for frame sync detection using channel combining and correlation
    • 使用信道组合和相关的帧同步检测方法和装置
    • US07130333B2
    • 2006-10-31
    • US09995095
    • 2001-11-27
    • Leroy Andrew Gibson, Jr.Dan M. GriffinLyman D. HorneRandal R. Sylvester
    • Leroy Andrew Gibson, Jr.Dan M. GriffinLyman D. HorneRandal R. Sylvester
    • H04B1/707
    • H04B1/7075
    • A method and device for frame sync detection using signal combining and correlation. The method comprises the steps of despreading PN coded signals to provide in-phase I1–In, and quadrature phase Q1–Qn signals, wherein each I1–In and each Q1–Qn signal contains at least one sync bit and n≧2. The at least one sync bit from each I1–In, and quadrature phase Q1–Qn signals are summed to form sums Is1 and Qs1, respectively. The next step provides a reference sync having at least one bit and compares each sum Is1 and Qs1 with the at least one reference bit. The results of each Is1 and Qs1 comparison are accumulated so as to form two accumulates, IA and QA, respectively. Each accumulate IA and QA, is squared to form IA2 and QA2 from which the sum IA2 and QA2 is formed. The sum IA2+QA2 is compared with a predetermined threshold and as a result of the comparison a determination of whether frame sync has been achieved is made.
    • 一种使用信号组合和相关的帧同步检测的方法和装置。 该方法包括以下步骤:对PN编码信号进行解扩,以提供同相I 1 -I N n N,以及正交相位Q 1 -Q 1, 其中每个I 1 -I n个和每个Q 1 -Q N n个/ N个 >信号包含至少一个同步位,n> = 2。 来自每个I 1 -I N SUB的至少一个同步位以及正交相位Q 1 -Q N n N 信号被相加以形成和分别分别为I S 1和S 2。 下一步骤提供具有至少一个比特的参考同步,并将每个和I 1和S 1和S 1< S 1<和< S 1<>和至少一个参考比特进行比较。 每个I< s1>和< s1<比较比较的结果被累积,以便形成两个累加, SUB>。 每个累加I A和A A A均被平方以形成I A 2和Q A 2, 总和2和/或2< 2>和< 2> 2< 2> 形成了。 将总和与预定阈值进行比较,并作为比较的结果。 确定是否已经实现帧同步。
    • 2. 发明授权
    • Acquisition of a synchronous CDMA TDD QPSK waveform using power and timing estimates
    • 使用功率和定时估计获取同步CDMA TDD QPSK波形
    • US07272124B1
    • 2007-09-18
    • US10284536
    • 2002-10-30
    • Lyman D. HorneBrad HansenDelon Jones
    • Lyman D. HorneBrad HansenDelon Jones
    • H04B7/216
    • H04B1/7077H04B1/7075H04B1/70755
    • A method and system for using power and timing estimates to acquire frame acquisition of a reverse CDMA carrier signal. The method includes providing at least one remote transceiver device acquiring a forward CDMA carrier signal, and the one remote transceiver device transmitting a reverse CDMA carrier signal modified to include a frequency associated with the forward CDMA carrier signal. A transceiver base station, in response to determining if the reverse CDMA carrier signal exceeds a reverse CDMA carrier signal threshold (RCCST), uses the frequency embedded in the modified reverse CDMA carrier signal to acquire phase of the reverse CDMA carrier signal. Achieving acquisition the transceiver base station signals a mode change to the remote transceiver. Otherwise, the transceiver base station signals the remote transceiver device to slip the reverse CDMA carrier signal a predetermined number of chips; and/or transmit the reverse CDMA carrier signal at a second power level.
    • 一种使用功率和定时估计来获取反向CDMA载波信号的帧获取的方法和系统。 该方法包括提供至少一个远程收发器设备获取前向CDMA载波信号,并且一个远程收发器设备发送被修改为包括与前向CDMA载波信号相关联的频率的反向CDMA载波信号。 收发机基站响应于确定反向CDMA载波信号是否超过反向CDMA载波信号阈值(RCCST),使用嵌入在修改的反向CDMA载波信号中的频率来获取反向CDMA载波信号的相位。 实现采集收发基站向远程收发信机发送模式更改。 否则,收发机基站向远程收发器装置发信号通知反向CDMA载波信号预定数量的芯片; 和/或以第二功率电平发送反向CDMA载波信号。
    • 5. 发明授权
    • Acquisition of a synchronous CDMA TDD QPSK waveform using variable thresholds for PN and burst synchronization
    • 使用PN和突发同步的可变阈值获取同步CDMA TDD QPSK波形
    • US07133440B1
    • 2006-11-07
    • US10280167
    • 2002-10-25
    • Lyman D. HorneDelon JonesSamuel KingstonSteven Perkins
    • Lyman D. HorneDelon JonesSamuel KingstonSteven Perkins
    • H04B1/69H04B7/216
    • H04B1/707H04B1/7075H04B1/7087
    • A method and system for open-loop acquisition of a pseudo-noise (PN) encoded QPSK burst signal is provided. The method includes the steps of determining a PN correlation accumulation (PNCA) threshold and a sync threshold. Searching for a burst signal synchronization by searching a burst preamble for a sync word exceeding the sync threshold. In response to detecting the sync word, performing a PNCA of at least 256 bits following the detected sync word and comparing the PNCA of the at least 256 bits with the PNCA threshold. The comparison further includes the step of verifying that the PNCA of the 256 bits following the detected sync word exceeds the PNCA threshold and then verifying sync word detection. Next, using the burst preamble an estimate of carrier signal frequency is determined; and using a subsequent burst preamble carrier signal frequency and carrier signal phase is determined.
    • 提供了一种用于开环获取伪噪声(PN)编码的QPSK突发信号的方法和系统。 该方法包括确定PN相关累积(PNCA)阈值和同步阈值的步骤。 通过搜索突发前导码来搜索超过同步阈值的同步字搜索突发信号同步。 响应于检测到同步字,在检测到的同步字之后执行至少256位的PNCA,并将至少256位的PNCA与PNCA阈值进行比较。 比较还包括验证检测到的同步字之后的256位的PNCA超过PNCA阈值,然后验证同步字检测的步骤。 接下来,使用脉冲串前导码确定载波信号频率的估计; 并且确定使用随后的突发前同步码载波信号频率和载波信号相位。