专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5862190A Method and apparatus for decoding an encoded signal 失效
标题翻译：用于解码编码信号的方法和装置
公开(公告)号：US5862190A
公开(公告)日：1999-01-19
申请号：US581696
申请日：1995-12-29
申请人： Terry Michael Schaffner
发明人： Terry Michael Schaffner
IPC分类号： H03M13/23 , H03M13/27 , H03M13/41 , H03M13/45 , H04B7/08 , H04B7/26 , H04L1/00 , H04L25/03 , H04L27/10 , H03D1/00 , H04L27/06
CPC分类号： H04L1/0059 , H04L25/03178 , H04L27/10 , H04L27/103
摘要： A decoder (215) implemented in a receiver of a wireless communication system employs an improved method and apparatus for decoding an encoded signal. The receiver sums the energy values (156A, 156B, . . . 156N) from a plurality of fingers within to produce an aggregate energy value (166). From the aggregate energy value (166), a set of log-likelihood values (207) are generated with a non-linear function generator (205) before being deinterleaved by a deinterleaver (210). The deinterleaved values (213) are input to the decoder (215) which estimates the original signal (178) by incorporating path histories of bits in the estimation of subsequent, related bits. Use of the path histories of bits improves the estimates of the original signal (178), which translates into an increase in the sensitivity of the receiver.
摘要翻译：在无线通信系统的接收机中实现的解码器（215）采用改进的编码信号解码方法和装置。接收器从多个指状物中合并能量值（156A，156B，... 156N）以产生总能量值（166）。从聚合能量值（166），在由解交织器（210）解交织之前，用非线性函数发生器（205）生成一组对数似然值（207）。解交织值（213）被输入到解码器（215），解码器（215）通过在随后相关比特的估计中并入比特的路径历史来估计原始信号（178）。使用比特的路径历史改进了原始信号（178）的估计，这转化为接收机的灵敏度的增加。

2. 发明授权

US07177265B1 Iterative method, and apparatus for acquiring time and frequency synchronization in a DSSS receiver 有权
标题翻译：迭代方法和用于在DSSS接收机中获取时间和频率同步的装置
公开(公告)号：US07177265B1
公开(公告)日：2007-02-13
申请号：US10050462
申请日：2002-01-15
申请人： Terry Michael Schaffner
发明人： Terry Michael Schaffner
IPC分类号： H04J11/00
CPC分类号： E02F5/101 , A01G25/06 , E02F5/102 , H04B1/7077 , H04L2027/003
摘要： A method and apparatus for acquiring time and frequency synchronization in a DSSS receiver are disclosed. An iterative approach is used in acquiring a DSSS signal when the phase coherency of the signal is less than the symbol length.
摘要翻译：公开了一种在DSSS接收机中获取时间和频率同步的方法和装置。当信号的相位一致性小于符号长度时，采用迭代方法来获取DSSS信号。

3. 发明授权

US06169887A Range extension within a communication system 有权
标题翻译：通信系统范围扩展
公开(公告)号：US06169887A
公开(公告)日：2001-01-02
申请号：US09260697
申请日：1999-03-02
申请人： Donald Paul Cordell , Terry Michael Schaffner
发明人： Donald Paul Cordell , Terry Michael Schaffner
IPC分类号： H04B7216
CPC分类号： H04B1/707 , H04B7/2609
摘要： Receivers (201, 202) within a base station (101) receive a transmission from a remote unit (114). The received signal is delayed a first amount by first delay circuitry (203), and a second amount by second delay circuitry (204). During despreading, a delayed input signal is despread with a Pseudo-Random (PN) code. The system time utilized by the PN generators (213, 214) is delayed a third time period by third and fourth delaying circuitry (215, 216).
摘要翻译：基站（101）内的接收机（201,202）从远程单元（114）接收传输。所接收的信号由第一延迟电路（203）延迟第一量，第二量由第二延迟电路（204）延迟。在解扩过程中，延迟输入信号用伪随机（PN）码进行解扩。由PN发生器（213,214）利用的系统时间由第三和第四延迟电路（215,216）延迟第三时间段。

4. 发明授权

US5754599A Method and apparatus for coherent channel estimation in a communication system 失效
标题翻译：通信系统中相干信道估计的方法和装置
公开(公告)号：US5754599A
公开(公告)日：1998-05-19
申请号：US582856
申请日：1996-01-04
申请人： Fuyun Ling , Terry Michael Schaffner
发明人： Fuyun Ling , Terry Michael Schaffner
IPC分类号： H04J13/04 , H03M13/23 , H03M13/45 , H04L25/02 , H04L27/06
CPC分类号： H04L25/0236 , H04L25/0214
摘要： Generally stated, a receiver in a communication system implements coherent channel estimation by first receiving an encoded signal and then generating a complex channel estimate from the encoded signal. The receiver then combines the complex channel estimate with the encoded signal to produce a coherent demodulated signal. After combining, the receiver decodes a version of the coherent demodulated signal to produce an estimate of the encoded signal prior to encoding.
摘要翻译：通常，通信系统中的接收机通过首先接收编码信号然后从编码信号产生复数信道估计来实现相干信道估计。然后，接收机将复杂信道估计与编码信号组合以产生相干解调信号。在组合之后，接收机对相干解调信号的版本进行解码，以在编码之前产生编码信号的估计。

5. 发明授权

US06580767B1 Cache and caching method for conventional decoders 有权
标题翻译：常规解码器的缓存和缓存方法
公开(公告)号：US06580767B1
公开(公告)日：2003-06-17
申请号：US09425756
申请日：1999-10-22
申请人： Kevin P. Koehler , Terry Michael Schaffner
发明人： Kevin P. Koehler , Terry Michael Schaffner
IPC分类号： H03D100
CPC分类号： H04L1/0055 , H03M13/3905 , H03M13/3972 , H03M13/6566
摘要： A method and cache for caching encoded symbols for a convolutional decoder with forward and backward recursion includes storing different encoded symbols of an encoded frame in each of a plurality of symbol memory elements (200, 202, 400) and routing the same encoded symbols from one of the plurality of symbol memory elements (200, 202, 400) to at least both a forward recursion decoder (208) and a backward recursion decoder (210, 402). The plurality of symbol memory elements may be, for example, single port RAM cells, each operatively controlled to receive different encoded symbols of an encoded frame as input. Control logic (204) routes the same encoded symbols from one of the plurality of symbol memory elements (200, 202, 400) to all of the recursion decoders (208, 210, 402).
摘要翻译：一种用于对具有前向和后向递归的卷积解码器进行编码符号的高速缓存的方法和缓存器包括在多个符号存储器元件（200,202,400）的每一个中存储编码帧的不同编码符号，并将相同编码符号从一个所述多个符号存储元件（200,202,400）中的至少一个至少是向前递归解码器（208）和反向递归解码器（210,402）。多个符号存储器元件可以是例如单端口RAM单元，每个单端口RAM单元被操作地控制以接收编码帧的不同编码符号作为输入。控制逻辑（204）将相同的编码符号从多个符号存储元件（200,202,400）中的一个路由到所有的递归解码器（208,210,402）。

6. 发明授权

US06172994B2 Method and apparatus for creating a composite waveform 失效
标题翻译：用于创建复合波形的方法和装置
公开(公告)号：US06172994B2
公开(公告)日：2001-01-09
申请号：US08446152
申请日：1995-05-22
申请人： Terry Michael Schaffner , Michael D. Kotzin , Anthony P. Van den Heuvel
发明人： Terry Michael Schaffner , Michael D. Kotzin , Anthony P. Van den Heuvel
IPC分类号： H04B7216
CPC分类号： H04B1/707 , H04L1/00 , H04L5/12
摘要： A method and apparatus is provided for creating a composite waveform. This composite waveform is created by coding a plurality of input digital information signals. Subsequently, the plurality of coded input digital information signals are communicated over a communication medium to a digital combiner. The digital combiner combines the plurality of coded input digital information signals. Finally, the digitally combined information signal is spectrally shaped to form a composite waveform. These composite waveform creation principals may be applied to digitally encoded voice subbands in a subband coding system as well as channel information in a direct sequence code division multiple access (DS-CDMA) communication system transmitter.
摘要翻译：提供了一种用于创建复合波形的方法和装置。通过对多个输入数字信息信号进行编码来创建该复合波形。随后，多个编码输入数字信息信号通过通信介质传送到数字组合器。数字组合器组合了多个编码的输入数字信息信号。最后，数字组合信息信号被频谱整形以形成复合波形。这些复合波形产生原理可以应用于子带编码系统中的数字编码语音子带以及直接序列码分多址（DS-CDMA）通信系统发射机中的信道信息。

7. 发明授权

US09528243B1 Iterative method, and apparatus for acquiring time and frequency synchronization in a DSSS receiver 有权
标题翻译：迭代方法和用于在DSSS接收机中获取时间和频率同步的装置
公开(公告)号：US09528243B1
公开(公告)日：2016-12-27
申请号：US11382019
申请日：2006-05-06
申请人： Terry Michael Schaffner
发明人： Terry Michael Schaffner
IPC分类号： H04B1/69 , H04B7/216 , H04J13/00 , E02F5/10 , A01G25/06
CPC分类号： E02F5/101 , A01G25/06 , E02F5/102 , H04B1/7077 , H04L2027/003
摘要： A method and apparatus for acquiring time and frequency synchronization in a DSSS receiver are disclosed. An iterative approach is used in acquiring a DSSS signal when the phase coherency of the signal is less than the symbol length.
摘要翻译：公开了一种在DSSS接收机中获取时间和频率同步的方法和装置。当信号的相位一致性小于符号长度时，采用迭代方法来获取DSSS信号。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式