会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明专利
    • Software-based spread spectrum signal processing
    • JP2008541585A
    • 2008-11-20
    • JP2008510424
    • 2006-03-15
    • ノードナブ テクノロジーズ アーベー
    • スターベーク,クリスチャンノーマーク,パー−ルドヴィグ
    • H04B1/707
    • H04L65/607H04B1/707H04B1/7077H04B1/7095H04B2201/7071H04B2201/70715
    • The present invention relates to production of a decoded signal (A Ä ) based on in an incoming stream of data samples (d(k)) representing at least one downconverted digitized spread spectrum source signal. A number (NM) of the received data samples (d(k)) are divided into a first number (N) of data blocks, where each data block contains a second number (M) of samples. The second number (M) is an integer larger than or equal to two. Each of the data blocks is then correlated with a respective local code replica segment (p(k)) to produce a first number (N) of intermediate accumulation results (£ I ; £ Q ). To enable production of a decoded signal (A Ä ) being compensated for a Doppler shift relative to a downconverting frequency for the least one spread spectrum source signal, the intermediate accumulation results (£ I ; £ Q ) are correlated with a carrier vector (s[z] I ; s[z Q ) expressing such a Doppler shift. However, according to the invention, the carrier vector (s[z] I ; s[z] Q ) only contains a target number (Z) of carrier values (s 1I :s ZI ; s 1Q :s ZQ ) (i.e. different carrier amplitude levels), where the target number (Z) is smaller than or equal to the first number (N). Normally, the target number (Z) is substantially smaller than the first number (N). Thus, depending on the first number (N) and the target number (Z) for the relevant carrier vector (s[z] I ; s[z] Q ), a number of consecutive results of the intermediate accumulation results (£ I ; £ Q ) are combined into a number of aggregated accumulation results (c 1I :c ZI ; c 1Q :c ZQ ), which is equal to the target number (Z). Thereafter, the aggregated accumulation results (c 1I :c ZI ; c 1Q :c ZQ ) are correlated with the carrier vector (s[z] I ; s[z] Q ) to produce the decoded signal (A Ä ). The invention is well adapted for implementation of software GNSS receivers.
    • 5. 发明专利
    • Pulse base communication system
    • 脉冲通信系统
    • JP2006041705A
    • 2006-02-09
    • JP2004215861
    • 2004-07-23
    • Handotai Rikougaku Kenkyu Center:Kk株式会社半導体理工学研究センター
    • SANADA YUKITOSHIFURUKAWA JUN
    • H04J13/00H04B1/7075H04B1/7183H04L7/00
    • H04B1/7183H04B1/7095
    • PROBLEM TO BE SOLVED: To simply enable synchronization capture even in a multi-pass generation environment in a synchronization capturing system by a correlation method in pulse base communication, and to eliminate the need for newly performing the synchronization capture capture even if transmission information becomes different information.
      SOLUTION: A pulse base communication system includes a correlator (21) for sign synchronizing which takes synchronizing with a first pulse signal of the same period as transmission information which transmitter sends and reception information, and a correlator (22) having a memory (211) for storing a correlation value when it has the period and the correlation value of a second non-modulated pulse signal and the receipt information exceeds predetermined threshold and its generating time as a pair, and for detecting timing for sequentially updating a memory content as a pair of the correlation value exceeding the correlation value stored in the memory and the generating time of the correlation value. The timing is established for generating the first pulse signal of the correlator (21) for sign synchronizing by using the time stored in the memory, and thereby establishing the synchronization of the receiving signal with the first pulse signal.
      COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:即使在脉冲基通信中的相关方法的同步捕获系统中,即使在多遍生成环境中也能简单地实现同步捕获,并且即使传输也不需要新执行同步捕获捕获 信息变成不同的信息。 解决方案:脉冲基通信系统包括用于符号同步的相关器(21),其与发射机发送和接收信息的发送信息与同一周期的第一脉冲信号同步,以及具有存储器的相关器(22) (211),用于当存储具有第二未调制脉冲信号的周期和相关值并且接收信息超过预定阈值并且其生成时间成对时存储相关值,并且用于检测用于顺序更新存储器内容的定时 作为一对相关值超过存储在存储器中的相关值和相关值的生成时间。 建立用于通过使用存储在存储器中的时间来产生用于符号同步的相关器(21)的第一脉冲信号的定时,从而建立接收信号与第一脉冲信号的同步。 版权所有(C)2006,JPO&NCIPI