公开(公告)号：US07352720B2

公开(公告)日：2008-04-01

申请号：US10840977

申请日：2004-05-07

申请人： Li Fung Chang ,  Yongqian Wang ,  Huaiyu Zeng ,  Xiaoxin Qiu ,  Baoguo Yang

发明人： Li Fung Chang ,  Yongqian Wang ,  Huaiyu Zeng ,  Xiaoxin Qiu ,  Baoguo Yang

IPC分类号： H04Q7/00

CPC分类号： H04L1/0068 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/0072 ,  H04L1/0075 ,  H04L1/203 ,  H04L1/206 ,  H04L1/208 ,  H04L25/067

摘要： RF communications received by a wireless terminal from a servicing base station are used to determine the BEP. These RF communications may be in the form of RF bursts that are part of a data frame. The signal to noise ratio (SNR) of the RF burst is determined and a sequence of soft decisions from the RF burst are extracted. The SNR maps to an estimated BEP based upon the modulation format and coding scheme of the RF burst. The soft decisions decode to produce a data block. When the soft decisions decoded favorably, the re-encoded data block produces a sequence of re-encoded decisions. Comparing the re-encoded decisions to the soft decisions yields a re-encoded bit error (RBER). When the decoding is unsuccessful, the BEP is estimated only upon the estimated BEP derived from the SNR. Otherwise, both the estimated BEP and RBER may be used to determine the BEP.

摘要翻译： 使用无线终端从服务基站接收的RF通信来确定BEP。 这些RF通信可以是作为数据帧的一部分的RF突发的形式。 确定RF突发的信噪比（SNR），并提取来自RF突发的软判决序列。 基于RF突发的调制格式和编码方案，SNR映射到估计的BEP。 软判决解码以产生数据块。 当软判决被有利地解码时，重新编码的数据块产生重新编码的决定的序列。 将重新编码的决定与软判决进行比较产生重编码位错误（RBER）。 当解码不成功时，仅根据从SNR得到的估计的BEP来估计BEP。 否则，估计的BEP和RBER都可以用于确定BEP。

公开(公告)号：US07826493B2

公开(公告)日：2010-11-02

申请号：US10228165

申请日：2002-08-26

申请人： Li Fung Chang ,  Nelson Sollenberger ,  Baoguo Yang

发明人： Li Fung Chang ,  Nelson Sollenberger ,  Baoguo Yang

IPC分类号： H04J3/06

CPC分类号： H04B1/7075 ,  H04B1/70735 ,  H04B1/708 ,  H04L2027/0046

摘要： Methods and apparatus for acquiring and verifying a code used by a base station. Acquisition time is reduced and circuitry simplified by performing Phase I and Phase II acquisitions in series, but in parallel with Phase III acquisition and verification, which are done in series. Phase III code acquisition is done by despreading the input signal using each of the possible codes in a code group. An estimation of the frequency offset between the base station and the terminal's local reference is used to correct the phase of the despread signals, which are coherently and non-coherently integrated. The largest accumulated value corresponds to the code used by the base station. The code is verified by despreading the received signal, applying a frequency correction, and demodulating. The demodulated output is a series of symbols, and a count of these symbols verifies the acquired code.

摘要翻译： 用于获取和验证基站使用的代码的方法和装置。 通过串联完成第一阶段和第二阶段的并购，但是与第三阶段采集和验证并行完成了采集时间，简化了电路。 通过使用代码组中的每个可能代码解扩输入信号来完成III期代码获取。 使用基站和终端本地参考之间的频率偏移的估计来校正相干和非相干积分的解扩信号的相位。 最大的累积值对应于基站使用的代码。 通过解扩接收信号，应用频率校正和解调来验证码。 解调输出是一系列符号，并且这些符号的计数验证所获取的代码。

公开(公告)号：US07027539B2

公开(公告)日：2006-04-11

申请号：US10731858

申请日：2003-12-09

申请人： Baoguo Yang ,  Li Fung Chang ,  Zhijun Gong

发明人： Baoguo Yang ,  Li Fung Chang ,  Zhijun Gong

IPC分类号： H04B1/10

CPC分类号： H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L25/03006 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/0008 ,  H04L2025/03401 ,  H04L2025/03407 ,  H04L2025/03726 ,  H04L2027/0038

摘要： A wireless communication device processes N Radio Frequency (RF) bursts contained within N slots of a digital communications time divided frame, wherein N is a positive integer greater than one. The wireless communication device includes an RF front end, a baseband processor, and an equalizer module. The RF from end is operable to receive the plurality of received RF bursts and to convert the RF bursts to corresponding baseband signals. The baseband processor operably couples to the RF front end, is operable to receive the baseband signals, is operable to pre-equalization process the baseband signals to produce processed baseband signals, and is operable to post-equalization process soft decisions. The equalizer module operably couples to the baseband processor and is operable to equalize the processed baseband signals to produce the soft decisions. These RF bursts may be contained in adjacent slots or, in non-adjacent slots, or in a combination of adjacent slots and non-adjacent slots.

摘要翻译： 无线通信设备处理包含在数字通信时分分割帧的N个时隙内的N个射频（RF）突发，其中N是大于1的正整数。 无线通信设备包括RF前端，基带处理器和均衡器模块。 来自终端的RF可操作以接收多个接收的RF突发并将RF突发转换为对应的基带信号。 可操作地耦合到RF前端的基带处理器可操作以接收基带信号，可操作以预均衡处理基带信号以产生经处理的基带信号，并且可操作用于后均衡处理软判决。 均衡器模块可操作地耦合到基带处理器并且可操作以均衡经处理的基带信号以产生软判决。 这些RF突发可以被包含在相邻的时隙中，或者在非相邻的时隙中，或者在相邻的时隙和非相邻时隙的组合中。

公开(公告)号：US08014469B2

公开(公告)日：2011-09-06

申请号：US12428705

申请日：2009-04-23

申请人： Baoguo Yang ,  Li Fung Chang ,  Zhijun Gong

发明人： Baoguo Yang ,  Li Fung Chang ,  Zhijun Gong

IPC分类号： H03K9/06

CPC分类号： H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L25/03006 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/0008 ,  H04L2025/03401 ,  H04L2025/03407 ,  H04L2025/03726 ,  H04L2027/0038

摘要： A wireless communication device processes N Radio Frequency (RF) bursts contained within N slots of a digital communications time divided frame, wherein N is a positive integer greater than one. The wireless communication device includes an RF front end, a baseband processor, and an equalizer module. The RF front end is operable to receive the plurality of received RF bursts and to convert the RF bursts to corresponding baseband signals. The baseband processor is operable to receive the baseband signals, to pre-equalization process the baseband signals to produce processed baseband signals, and to post-equalization process soft decisions. The equalizer is operable to equalize the processed baseband signals to produce the soft decisions. These RF bursts may be contained in adjacent slots or, in non-adjacent slots, or in a combination of adjacent slots and non-adjacent slots.

摘要翻译： 无线通信设备处理包含在数字通信时分分割帧的N个时隙内的N个射频（RF）突发，其中N是大于1的正整数。 无线通信设备包括RF前端，基带处理器和均衡器模块。 RF前端可操作以接收多个接收的RF突发并将RF突发转换为对应的基带信号。 基带处理器可操作以接收基带信号，预均衡处理基带信号以产生经处理的基带信号，以及后均衡处理软判决。 均衡器可操作以均衡经处理的基带信号以产生软判决。 这些RF突发可以被包含在相邻的时隙中，或者在非相邻的时隙中，或者在相邻的时隙和非相邻时隙的组合中。

公开(公告)号：US07542523B2

公开(公告)日：2009-06-02

申请号：US11265021

申请日：2005-11-02

申请人： Baoguo Yang ,  Li Fung Chang ,  Zhijun Gong

发明人： Baoguo Yang ,  Li Fung Chang ,  Zhijun Gong

IPC分类号： H03K9/00

CPC分类号： H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L25/03006 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/0008 ,  H04L2025/03401 ,  H04L2025/03407 ,  H04L2025/03726 ,  H04L2027/0038

摘要： A wireless communication device processes N Radio Frequency (RF) bursts contained within N slots of a digital communications time divided frame, wherein N is a positive integer greater than one. The wireless communication device includes an RF front end, a baseband processor, and an equalizer module. The RF front end is operable to receive the plurality of received RF bursts and to convert the RF bursts to corresponding baseband signals. The baseband is operable to receive the baseband signals, to pre-equalization process the baseband signals to produce processed baseband signals, and to post-equalization process soft decisions. The equalizer module is operable to equalize the processed baseband signals to produce the soft decisions. These RF bursts may be contained in adjacent slots or, in non-adjacent slots, or in a combination of adjacent slots and non-adjacent slots.

摘要翻译： 无线通信设备处理包含在数字通信时分分割帧的N个时隙内的N个射频（RF）突发，其中N是大于1的正整数。 无线通信设备包括RF前端，基带处理器和均衡器模块。 RF前端可操作以接收多个接收的RF突发并将RF突发转换为对应的基带信号。 基带可操作以接收基带信号，预均衡处理基带信号以产生经处理的基带信号，以及后均衡处理软判决。 均衡器模块可操作以均衡经处理的基带信号以产生软判决。 这些RF突发可以被包含在相邻的时隙中，或者在非相邻的时隙中，或者在相邻的时隙和非相邻时隙的组合中。

公开(公告)号：US07342956B2

公开(公告)日：2008-03-11

申请号：US10749492

申请日：2003-12-31

申请人： Li Fung Chang ,  Baoguo Yang ,  Nelson Sollenberger

发明人： Li Fung Chang ,  Baoguo Yang ,  Nelson Sollenberger

IPC分类号： H04B1/38 ,  H04L5/16

CPC分类号： H04W74/006 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0079 ,  H04L1/0091 ,  H04L25/03318 ,  H04L27/0012 ,  H04W28/18 ,  H04W74/0833 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1226 ,  Y02D70/23

摘要： Determining whether a first wireless terminal may transmit on an uplink to a servicing base station in a cellular wireless communication system includes first receiving a plurality of a Radio Frequency (RF) bursts at a wireless terminal from a servicing base station. These RF bursts carry a data block containing both Uplink Status Flag (USF) bits and Data bits. Data bits may or may not be intended for the receiving wireless terminal. The RF bursts are processed to produce the data block in an encoded format. This data block is then partially decoded to extract the USF bits when the data bits are not intended for the receiving wireless terminal. These USF bits determine when the receiving wireless terminal can transmit or uplink to the servicing base station. The partial decoding may be halted once the USF bits have been extracted from the received data block to reduce power consumption and processing requirements.

摘要翻译： 确定在蜂窝无线通信系统中第一无线终端是否可以在上行链路上向服务基站发送包括首先从服务基站在无线终端处接收多个射频（RF）突发。 这些RF脉冲串携带包含上行链路状态标志（USF）位和数据位的数据块。 数据位可能或可能不适用于接收无线终端。 RF脉冲串被处理以产生编码格式的数据块。 然后，当数据位不用于接收无线终端时，该数据块被部分解码以提取USF位。 这些USF位确定接收无线终端何时可以向服务基站发送或上行链路。 一旦从接收到的数据块中提取了USF位，就可以停止部分解码，以减少功耗和处理要求。

公开(公告)号：US20090219982A1

公开(公告)日：2009-09-03

申请号：US12464833

申请日：2009-05-12

申请人： Baoguo Yang ,  Huaiyu (Hanks) Zeng

发明人： Baoguo Yang ,  Huaiyu (Hanks) Zeng

IPC分类号： H04B1/10 ,  H03K5/159

CPC分类号： H04L25/03019 ,  H04L25/03254 ,  H04L25/03318

摘要： A channel dispersion estimation algorithm(s) may be implemented within a channel length estimation module of a multi-branch equalizer processing module that disables a branch of the multi-branch equalizer processing module when the channel length or channel delay spread associated with received radio frequency (RF) bursts exceeds a predetermined threshold. The channel dispersion estimation algorithm identifies when the radio frequency (RF) bursts have a channel length or channel delay spread that can affect receiver performance. The channel length estimation module may disable interference cancellation by a branch of the multi-branch equalizer processing module in response to such a channel length or channel delay spread.

摘要翻译： 可以在多分支均衡器处理模块的信道长度估计模块内实现信道分散估计算法，该方法在与所接收的射频相关的信道长度或信道延迟扩展时禁用多分支均衡器处理模块的分支 （RF）突发超过预定阈值。 信道色散估计算法识别何时射频（RF）突发具有可影响接收机性能的信道长度或信道延迟扩展。 信道长度估计模块可以响应于这种信道长度或信道延迟扩展来禁止多分支均衡器处理模块的分支的干扰消除。

公开(公告)号：US07489741B2

公开(公告)日：2009-02-10

申请号：US11389362

申请日：2006-03-25

申请人： Baoguo Yang ,  Nelson R. Sollenberger

发明人： Baoguo Yang ,  Nelson R. Sollenberger

IPC分类号： H04L25/06

CPC分类号： H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L5/0048 ,  H04L25/03171 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2017 ,  H04L27/2067 ,  H04L27/22

摘要： A method to perform DC compensation on a Radio Frequency (RF) burst transmitted between a servicing base station and a wireless terminal in a cellular wireless communication system that first receives the RF burst modulated according to either a first or second modulation format. Samples from the RF burst, or taken from the training sequence, are produced and averaged to produce a DC offset estimate. The DC offset estimate is then subtracted from each of the samples. The modulation format of RF burst may then be identified from the samples. Depending on the identified modulation format the DC offset estimate may be re-added to the samples when a particular modulation format is identified as the modulation format of the RF burst. This decision is made based on how well various components within the wireless terminal perform DC offset compensation.

摘要翻译： 在首先接收根据第一或第二调制格式调制的RF突发的蜂窝无线通信系统中在服务基站和无线终端之间传送的射频（RF）突发上执行DC补偿的方法。 产生来自RF突发或从训练序列获取的样本并对其进行平均以产生DC偏移估计。 然后从每个样本中减去DC偏移估计。 然后可以从样本中识别RF突发的调制格式。 根据所识别的调制格式，当将特定调制格式识别为RF突发的调制格式时，可以将DC偏移估计重新添加到样本。 该决定基于无线终端内的各种组件执行DC偏移补偿的程度。

公开(公告)号：US07535980B2

公开(公告)日：2009-05-19

申请号：US11151030

申请日：2005-06-13

申请人： Baoguo Yang ,  Huaiyu (Hanks) Zeng

发明人： Baoguo Yang ,  Huaiyu (Hanks) Zeng

IPC分类号： H04B1/10

CPC分类号： H04L25/03019 ,  H04L25/03254 ,  H04L25/03318

摘要： This invention provides channel dispersion estimation algorithm(s). This channel dispersion estimation algorithm(s) may be implemented within a channel length estimation module of a single-branch or multi-branch equalizer processing module that enables interference cancellation when the channel length or channel delay spread associated with received radio frequency (RF) bursts compares unfavorably to predetermined thresholds. The channel dispersion estimation algorithm identifies when the radio frequency (RF) bursts have a channel length or channel delay spread that can affect receiver performance. The channel length estimation module may disable interference cancellation in response to such a channel length or channel delay spread. Additionally, the channel length estimation module may adjust the number of equalizer states for the single-branch or first branch of a multi-branch equalizer based the channel length or channel delay spread. The multi-branch equalizer improves the signal-to-noise ratio by improving the equalization by selectively disabling interference cancellation and adjusting the number of equalizer states for the single-branch or first branch equalizer.

摘要翻译： 本发明提供了信道色散估计算法。 该信道色散估计算法可以在单分支或多分支均衡器处理模块的信道长度估计模块内实现，当与接收的射频（RF）突发相关联的信道长度或信道延迟扩展时，能够进行干扰消除 不利于预定阈值。 信道色散估计算法识别何时射频（RF）突发具有可影响接收机性能的信道长度或信道延迟扩展。 信道长度估计模块可以响应于这种信道长度或信道延迟扩展来禁用干扰消除。 此外，信道长度估计模块可以基于信道长度或信道延迟扩展来调整多分支均衡器的单分支或第一分支的均衡器状态的数量。 多分支均衡器通过选择性地禁用干扰消除和调整单分支或第一分支均衡器的均衡器状态的数量来改善均衡来提高信噪比。

公开(公告)号：US20090103667A1

公开(公告)日：2009-04-23

申请号：US12253927

申请日：2008-10-17

申请人： Jianxuan Du ,  Yue Chen ,  Baoguo Yang

发明人： Jianxuan Du ,  Yue Chen ,  Baoguo Yang

IPC分类号： H04L27/06

CPC分类号： H04L27/2647 ,  H04H60/07 ,  H04L27/2656 ,  H04L27/2663 ,  H04L27/2678

摘要： This invention relates to methods for determining coarse symbol timing and mode detection by using CP correlation-based techniques. In particular, this invention relates to methods for determining symbol timing, frame timing, and system mode for signal acquisition, comprising the steps of: detecting symbol timing and system mode based on cyclic prefix correlation; and determining a null symbol as a function of a pre-defined number of consecutive symbols and using said null symbol to determine frame timing.

摘要翻译： 本发明涉及通过使用基于CP相关的技术来确定粗符号定时和模式检测的方法。 具体地说，本发明涉及用于确定信号采集的符号定时，帧定时和系统模式的方法，包括以下步骤：基于循环前缀相关检测符号定时和系统模式; 以及确定作为预定数量的连续符号的函数的空符号，并且使用所述空符号来确定帧定时。