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41. 发明授权

US06434185B1 Correlation system for use in wireless direct sequence spread spectrum systems 有权
标题翻译：用于无线直接序列扩频系统的相关系统
公开(公告)号：US06434185B1
公开(公告)日：2002-08-13
申请号：US09641289
申请日：2000-08-17
申请人： Paul F. Struhsaker , Jane L. Smith
发明人： Paul F. Struhsaker , Jane L. Smith
IPC分类号： H04K700
CPC分类号： H04B1/70752 , H04B1/70751 , H04B1/708 , H04B1/7095 , H04B2201/70707
摘要： A correlation system for use in wireless direct sequence spread spectrum systems includes a RF down converter which receives an encoded RF signal and generates therefrom analog in-phase (I) and quadrature (Q) signal components. These components are digitized and the digitized signals are then passed to each of the high precision correlator circuit and a low precision correlator circuit. The low precision correlator circuit consist of a bank of a plurality of low precision correlators which receive the I and Q signal components as inputs and correlates the same with progressively phase shifted or delay pseudo noise (PN) codes. A low precision correlation circuit locks on to the appropriate PN code phase shift or delay and applies the same as a reference PN code to the high precision correlation circuit for data acquisition and demodulation.
摘要翻译：用于无线直接序列扩频系统的相关系统包括RF下变频器，其接收经编码的RF信号并由其产生模拟同相（I）和正交（Q）信号分量。这些组件被数字化，然后数字化的信号被传递到每个高精度相关器电路和低精度相关器电路。低精度相关器电路由多个低精度相关器组组成，其接收I和Q信号分量作为输入，并将其与渐进相移或延迟伪噪声（PN）码相关。低精度相关电路锁定到适当的PN码相移或延迟，并将其与参考PN码相同，用于数据采集和解调的高精度相关电路。

42. 发明授权

US06430171B1 Receiver apparatus for a random access channel of a CDMA mobile communication system 失效
标题翻译： CDMA移动通信系统的随机接入信道的接收机装置
公开(公告)号：US06430171B1
公开(公告)日：2002-08-06
申请号：US09361119
申请日：1999-07-27
申请人： Tadashi Ogami , Yoshihiro Unno
发明人： Tadashi Ogami , Yoshihiro Unno
IPC分类号： H04B7216
CPC分类号： H04B1/70751 , H04B1/707 , H04B1/709 , H04B1/7117 , H04B7/2628
摘要： A random access channel receiver used in a base station of a CDMA mobile communication system is provided. The receiver is only provided with a single signal decoding part for performing burst reception of control request signals having different off-set timing each other. A synchronizing circuit calculates correlation value at each off-set timing, and a synchronism determining and establishing circuit determines the off-set timing to be used for a synchronizing signal for receiving the signal frame currently arriving by monitoring correlation values of respective off-set timings, and alters the off-set timing for the synchronizing signal to better quality of signal if a plurality of signal frames of different off-set timing are arrived. The signal frame of less quality is discarded, or abandoned its decoding processing.
摘要翻译：提供了一种在CDMA移动通信系统的基站中使用的随机接入信道接收机。接收机仅具有单个信号解码部分，用于执行具有不同偏移定时的控制请求信号的突发接收。同步电路在每个偏移定时计算相关值，并且同步确定和建立电路通过监视各个偏移定时的相关值来确定用于接收当前到达的信号帧的同步信号的偏移定时并且如果达到不同偏移定时的多个信号帧，则将同步信号的偏移定时改变为更好的信号质量。质量较差的信号帧被丢弃，或放弃其解码处理。

43. 发明授权

US06421371B1 Modulation sequence synchronization methods and apparatus employing partial sequence correlation 有权
标题翻译：调制序列同步方法和采用部分序列相关的装置
公开(公告)号：US06421371B1
公开(公告)日：2002-07-16
申请号：US09193583
申请日：1998-11-17
申请人： Essam Sourour , Gregory E. Bottomley , R. David Koilpillai
发明人： Essam Sourour , Gregory E. Bottomley , R. David Koilpillai
IPC分类号： H04L2730
CPC分类号： H04B1/70752 , G06F17/15 , H04B1/70751 , H04B1/7077
摘要： A receiver in a communications system is operated by receiving a radio communications signal transmitted by a station of the communications system and generating a correlation output representing a correlation of the received radio communications signal and a subsequence of a modulation sequence that is selected based on a correlation between the selected subsequence and the modulation sequence. The receiver is then synchronized based on the generated correlation output. The selected subsequence preferably has an optimal out-of-phase correlation with the modulation sequence. According to an aspect of the present invention, the selected subsequence has a minimum out of phase correlation with the modulation sequence in comparison to other subsequences of the modulation sequence. For example, the selected subsequence may have a “minimum maximum” out-of-phase correlation value, a “minimum aggregate” out-of-phase correlation metric, or a combination thereof.
摘要翻译：通信系统中的接收机通过接收由通信系统的站发送的无线电通信信号来工作，并产生表示所接收的无线电通信信号与基于相关性选择的调制序列的子序列的相关性的相关输出在所选择的子序列和调制序列之间。接收机然后基于产生的相关输出进行同步。所选择的子序列优选地与调制序列具有最佳的异相相关。根据本发明的一个方面，与调制序列的其他子序列相比，所选择的子序列与调制序列具有最小的异相相关性。例如，所选择的子序列可以具有“最小最大值”异相相关值，“最小聚合”异相相关度量或其组合。

44. 发明授权

US06330292B1 Reduced power matched filter 有权
标题翻译：减少功率匹配滤波器
公开(公告)号：US06330292B1
公开(公告)日：2001-12-11
申请号：US09197597
申请日：1998-11-23
申请人： Paul Dent , Kenzo Urabe
发明人： Paul Dent , Kenzo Urabe
IPC分类号： H04L2730
CPC分类号： H04B1/70752 , G06F17/15 , H04B1/70751 , H04B1/7093 , H04B1/7095 , H04B2201/70707
摘要： A matched filter for use in a radio telephone receiver that receives Code Division Multiple Access (CDMA) signals. The matched filter produces precombinations of input values to significantly reduce the number of multiplication and addition operations, compared to conventional matched filters, required to produce a correlation value. This reduced number of required operations, along with a reduced number of delay elements required to despread CDMA signals, significantly reduces the overall power consumption of the matched filter. The use of such a matched filter in a device like a cellular phone, for example, would thus lead to longer battery life.
摘要翻译：用于接收码分多址（CDMA）信号的无线电话接收机中的匹配滤波器。与产生相关值所需的常规匹配滤波器相比，匹配滤波器产生输入值的预组合以显着减少乘法和加法运算的数量。所需操作的减少数量以及解扩CDMA信号所需的延迟元件数量减少，显着降低了匹配滤波器的总功耗。因此，例如在诸如蜂窝电话的设备中使用这样的匹配滤波器将导致更长的电池寿命。

45. 发明授权

US5949817A Multi-level correlation system for synchronization detection in high noise and multi-path environments 失效
标题翻译：用于高噪声和多路径环境中的同步检测的多级相关系统
公开(公告)号：US5949817A
公开(公告)日：1999-09-07
申请号：US168269
申请日：1998-10-07
申请人： Kenneth E. Marshall
发明人： Kenneth E. Marshall
IPC分类号： H04B1/7075 , H04B1/7077 , H04B1/708 , H04L27/30
CPC分类号： H04B1/70752 , H04B1/70755 , H04B1/70775 , H04B1/708 , H04B1/70751
摘要： A multi-level correlation technique and apparatus for detecting symbol and data frame synchronization in high noise and multi-path environments, wherein received signals are correlated with known pseudorandom noise (PN) or other known codes at the base level and the base level correlation results are in turn correlated with PN or other known codes at the next higher level, such that the top level of correlation includes all lower levels of encoding in the complete synchronization pattern. In a two level implementation, the base level codes define symbols while the top level code defines the synchronization pattern in terms of the base level symbols. Correlation hardware is minimized while processing gain is maximized for enhancing low signal to noise levels over a long synchronization pattern. Additionally, precise ranging is facilitated because the top level correlation result covers the entire synchronization pattern.
摘要翻译：一种用于在高噪声和多径环境中检测符号和数据帧同步的多级相关技术和装置，其中接收的信号与已知的伪随机噪声（PN）或其他已知的基准码相关，并且基本相关结果这又与PN或其他已知的代码在下一个更高的级别相关联，使得相关的最高级别包括完整同步模式中的所有较低级别的编码。在两级实现中，基本级代码定义符号，而顶级代码根据基本级符号定义同步模式。相对硬件被最小化，同时处理增益最大化，以通过长同步模式增强低信噪比。另外，由于顶级相关结果覆盖了整个同步模式，所以精确测距是有利的。

46. 发明授权

US5931893A Efficient correlation over a sliding window 失效
标题翻译：滑动窗口的高效关联
公开(公告)号：US5931893A
公开(公告)日：1999-08-03
申请号：US967444
申请日：1997-11-11
申请人： Paul W. Dent , Eric Wang
发明人： Paul W. Dent , Eric Wang
IPC分类号： G06F17/15
CPC分类号： H04B1/70752 , G06F17/15 , H04B1/7095 , H04B1/70751 , H04B2201/70707
摘要： The details of an improved correlator and efficient method of correlation are disclosed. The last M received signal samples are compared with all shifts of a given M-bit binary codeword. The correlator adds or subtracts each of the signal samples accordingly, as the corresponding shift of the codeword contains a binary "1" or "0" in that position. The total is output for each new signal sample received, with a shift of one position between the signal samples and the codeword.
摘要翻译：公开了改进的相关器和有效的相关方法的细节。将最后M个接收到的信号样本与给定的M位二进制码字的所有移位进行比较。相关器相应地添加或减少每个信号样本，因为码字的相应移位在该位置包含二进制“1”或“0”。对于接收到的每个新的信号样本，输出总数，信号样本和码字之间的位置偏移。

47. 发明授权

US09871554B2 Method and vector computing unit for implementing de-scrambling and de-spreading, and computer storage medium 有权
公开(公告)号：US09871554B2
公开(公告)日：2018-01-16
申请号：US15109465
申请日：2014-07-15
申请人： ZHOGNXING Microelectronics Technology Co. Ltd
发明人： Wenqiong Lin , Li Hua , Yongsheng Zhang
IPC分类号： H04B1/00 , H04B1/707 , H04B1/7075 , H04W84/04
CPC分类号： H04B1/707 , H04B1/70751 , H04W84/042
摘要： Provided are a method and vector computing unit for implementing de-scrambling and de-spreading, and a computer storage medium. The method includes that: an operation of complex multiplication on baseband data and corresponding de-scrambling and de-spreading codes is performed by adopting data transformation and addition, and data obtained by the complex multiplication is stored into a vector register file; a row of data obtained by the complex multiplication is read from the vector register file, every two adjacent pieces of data in the row of data are accumulated to obtain a half row of data, a ¼ row of data, and finally one piece of accumulated data; and the accumulation processing is continued on other rows of data to implement accumulation of each row of data obtained by the complex multiplication in the vector register file.

48. 发明授权

US08767891B2 Reception signal integrating method and receiver 有权
标题翻译：接收信号积分方法和接收机
公开(公告)号：US08767891B2
公开(公告)日：2014-07-01
申请号：US12973851
申请日：2010-12-20
申请人： Yoshitaka Yamagata , Norio Teruuchi
发明人： Yoshitaka Yamagata , Norio Teruuchi
IPC分类号： H04L27/06 , H03D1/00
CPC分类号： H04B1/70751 , G01S19/258 , G01S19/30 , H04B2201/70715
摘要： A reception signal integrating method includes: calculating, in receiving a satellite signal, when a reception signal of the satellite signal is time-divided at an assumed period obtained by estimating code period time of a spread code of the satellite signal, a coefficient representing a period shift between a true period and the assumed period of the spread code using first portions and second portions having an assumed period different from that of the first portions in the reception signal; and integrating the reception signal using the coefficient.
摘要翻译：一种接收信号积分方法，包括：在接收到卫星信号时，计算当卫星信号的接收信号在通过估计卫星信号的扩展码的码周期时间而获得的假设周期被分时时，使用具有与接收信号中的第一部分的假定周期不同的假定周期的第一部分和第二部分，在真实周期和假定的扩频码周期之间进行周期移位; 以及使用该系数对接收信号进行积分。

49. 发明授权

US07995860B2 Spectrum spreading signal demodulation method and apparatus 有权
标题翻译：频谱扩展信号解调方法和装置
公开(公告)号：US07995860B2
公开(公告)日：2011-08-09
申请号：US12586496
申请日：2009-09-23
申请人： Katsuyuki Tanaka
发明人： Katsuyuki Tanaka
IPC分类号： G06K9/36
CPC分类号： G06F17/156 , G01S7/4802 , G01S19/29 , G01S19/30 , H04B1/7075 , H04B1/70751 , H04B2201/70715
摘要： A spread spectrum signal demodulating method whereby spread-code synchronous acquisition and carrier synchronous acquisition are performed using FFT at high speed, wherein a received signal, of which the carrier wave is modulated with a signal obtained by spectrum- spreading data with a spread code, is subjected to the FFT and the result of the FFT is stored in a first memory. The FFT result of the received signal stored in the first memory and the result of FFT of the spread code stored in a second memory are read out and multiplied to detect the correlation between the received signal and the spread code. A readout address of either the FFT result of the received signal or the FFT result of the spread code is shifted by an amount corresponding to a carrier frequency of the received signal.
摘要翻译：一种扩展频谱信号解调方法，其中使用高速FFT进行扩频码同步采集和载波同步采集，其中通过利用扩频码频谱扩展数据获得的信号调制载波的接收信号，进行FFT，FFT的结果存储在第一存储器中。存储在第一存储器中的接收信号的FFT结果和存储在第二存储器中的扩展码的FFT结果被读出并相乘以检测接收信号和扩展码之间的相关性。接收信号的FFT结果或扩展码的FFT结果的读出地址偏移与接收信号的载波频率对应的量。

50. 发明申请

US20110158289A1 RECEPTION SIGNAL INTEGRATING METHOD AND RECEIVER 有权
标题翻译：接收信号集成方法和接收器
公开(公告)号：US20110158289A1
公开(公告)日：2011-06-30
申请号：US12973851
申请日：2010-12-20
申请人： Yoshitaka Yamagata , Norio Teruuchi
发明人： Yoshitaka Yamagata , Norio Teruuchi
IPC分类号： H04B1/69
CPC分类号： H04B1/70751 , G01S19/258 , G01S19/30 , H04B2201/70715
摘要： A reception signal integrating method includes: calculating, in receiving a satellite signal, when a reception signal of the satellite signal is time-divided at an assumed period obtained by estimating code period time of a spread code of the satellite signal, a coefficient representing a period shift between a true period and the assumed period of the spread code using first portions and second portions having an assumed period different from that of the first portions in the reception signal; and integrating the reception signal using the coefficient.
摘要翻译：一种接收信号积分方法，包括：在接收到卫星信号时，计算当卫星信号的接收信号在通过估计卫星信号的扩展码的码周期时间而获得的假设周期被分时时，使用具有与接收信号中的第一部分的假定周期不同的假定周期的第一部分和第二部分，在真实周期和假定的扩频码周期之间进行周期移位; 以及使用该系数对接收信号进行积分。

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