公开(公告)号：US20080298505A1

公开(公告)日：2008-12-04

申请号：US12176533

申请日：2008-07-21

Applicant: Ernest C. Chen ,  Joseph Santoru

Inventor： Ernest C. Chen ,  Joseph Santoru

IPC: H04L27/22

CPC classification number: H04L1/20 ,  H04L1/208 ,  H04L27/183 ,  H04L2001/0098

Abstract: A method and receiver systems for demodulating and decoding a hierarchically modulated signal, e.g. an 8PSK signal, are disclosed. An exemplary method includes demodulating and processing (502) the hierarchically modulated signal (202) to produce symbols (212) from the first modulation at the first hierarchical level, applying information (504) from a plurality of the symbols from the first modulation at the first hierarchical level in subtracting (214) from the demodulated hierarchically modulated signal to obtain the second modulation at the second hierarchical level and processing (506) the second modulation at the second hierarchical level to produce second symbols (222) from the demodulated second signal. The hierarchically modulated signal comprises a non-uniform 8PSK signal. Applying the information from the plurality of the symbols from the first modulation can be achieved by applying the symbols after error correction. A decision-directed demodulation of the first modulation can also be used to further improve performance.

Abstract translation: 用于解调和解码分层调制信号的方法和接收机系统，例如， 8PSK信号。 一种示例性方法包括解调和处理（502）分级调制信号（202）以从第一层级的第一调制产生符号（212），从来自第一调制的多个符号应用信息（504） 从解调的分层调制信号中减去（214）第一层级，以获得第二层级的第二调制，并处理（506）第二层级的第二调制，以从解调的第二信号产生第二符号（222）。 分级调制信号包括不均匀的8PSK信号。 可以通过在纠错后应用符号来实现来自第一调制的多个符号的信息。 也可以使用第一调制的决策导向解调来进一步提高性能。

公开(公告)号：US20080049873A1

公开(公告)日：2008-02-28

申请号：US11389362

申请日：2006-03-25

Applicant: Baoguo Yang ,  Nelson R. Sollenberger

Inventor： Baoguo Yang ,  Nelson R. Sollenberger

IPC: H04L25/06

CPC classification number: 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

Abstract: 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.

Abstract translation: 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输的射频（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。 取决于所识别的调制格式，当将特定调制格式识别为RF突发的调制格式时，DC偏移估计可被重新添加到样本。 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：US20060174179A1

公开(公告)日：2006-08-03

申请号：US11049991

申请日：2005-02-02

Applicant: Arun Visvanathan ,  Amit Butala ,  Parvathanathan Subrahmanya

Inventor： Arun Visvanathan ,  Amit Butala ,  Parvathanathan Subrahmanya

IPC: H03M13/00

CPC classification number: H04W52/12 ,  H04B1/7172 ,  H04L1/20 ,  H04L1/201 ,  H04L1/208 ,  H04W52/18 ,  H04W52/20 ,  H04W52/24 ,  H04W52/44

Abstract: To perform erasure detection for an intermittently active transport channel with unknown format, a receiver determines an energy metric and a symbol error rate (SER) for a received block with CRC failure. The receiver computes uncorrelated random variables u and v for the received block based on the energy metric and SER, the estimated means and standard deviations of the energy metric and SER, and a correlation coefficient indicative of the correlation between the energy metric and SER. The receiver then evaluates the uncorrelated random variables u and v based on at least one decision criterion and declares the received block to be an erased block or a DTX block based on the result of the evaluation. The decision criterion may be defined based on a target probability of false alarm and adjusted based on another metric, such as a zero state bit, for the received block.

Abstract translation: 为了对具有未知格式的间歇活动传输信道执行擦除检测，接收机确定具有CRC故障的接收块的能量度量和符号错误率（SER）。 接收机基于能量度量和SER，能量度量和SER的估计平均值和标准偏差以及表示能量度量与SER之间的相关性的相关系数，计算接收块的不相关随机变量u和v。 然后，接收机基于至少一个决策标准来评估不相关的随机变量u和v，并且基于评估结果将接收到的块声明为擦除块或DTX块。 可以基于目标误报率概率来定义判定标准，并且基于接收块的另一个度量（例如零状态位）进行调整。

公开(公告)号：US07027539B2

公开(公告)日：2006-04-11

申请号：US10731858

申请日：2003-12-09

Applicant: Baoguo Yang ,  Li Fung Chang ,  Zhijun Gong

Inventor： Baoguo Yang ,  Li Fung Chang ,  Zhijun Gong

IPC: H04B1/10

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US06941150B2

公开(公告)日：2005-09-06

申请号：US09989256

申请日：2001-11-20

Applicant: Rakesh Taori ,  Constant Paul Marie Josef Baggen ,  Andreas Johannes Gerrits

Inventor： Rakesh Taori ,  Constant Paul Marie Josef Baggen ,  Andreas Johannes Gerrits

IPC: H04J3/06 ,  H04L1/00 ,  H04L1/16 ,  H04L1/20 ,  H04B7/00

CPC classification number: H04L1/208 ,  H04L1/0041 ,  H04L1/1671 ,  H04L1/20

Abstract: A communication system (1) comprises a transmitter (2), a receiver (3), and an up/down link communication channel (4, 6) arranged for data communication from the transmitter (2) through the up link communication channel (4) to the receiver (3). The communication system (1) is further arranged to feedback data from the receiver (3) through the down link communication channel (6) to the transmitter (2). The receiver (3) comprises a bad frame indicator (5) for providing a bad frame indication (BFI) upon receipt of a corrupted frame, which is present in synchronized data communicated over the up link communication channel (4); and the transmitter (2) comprises resynchronization means (7) coupled to the down link communication channel (6) for receiving BFI related data and in response thereto recommencing data communication over the up link communication channel (4), in accordance with a resynchronization procedure, which starts from a predetermined state. A fast acting feedback resynchronization procedure for a GSM speech system is presented which prevents substantial error propagation from occurring at the receiver end.

Abstract translation: 通信系统（1）包括发射机（2），接收机（3）和布置用于通过上行链路通信信道（4）从发射机（2）进行数据通信的上/下链路通信信道 ）到接收器（3）。 通信系统（1）还被布置为通过下行链路通信信道（6）将数据从接收机（3）反馈到发射机（2）。 接收器（3）包括用于在接收到通过上行链路通信信道（4）传送的同步数据中存在的损坏的帧时提供坏帧指示（BFI）的坏帧指示符（5）。 并且所述发射机（2）包括耦合到所述下行链路通信信道（6）的再同步装置（7），用于接收BFI相关数据，并且响应于所述重新同步装置根据重新同步过程在所述上行链路通信信道（4）上重新开始数据通信 ，其从预定状态开始。 提出了一种用于GSM语音系统的快速反馈重新同步过程，其防止在接收机端发生大量错误传播。

公开(公告)号：US20040252790A1

公开(公告)日：2004-12-16

申请号：US10786258

申请日：2004-02-25

Applicant: Broadcom Corporation, a California Corporation

Inventor： Baoguo Yang ,  Nelson Sollenberger

IPC: H03D001/00 ,  H04L027/06

CPC classification number: H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L25/03171 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2017 ,  H04L27/2067 ,  H04L27/22

Abstract: The modulation format of a data block (frame) received from a servicing base station by a wireless terminal in a cellular wireless communication system is identified. This involves first receiving several radio frequency (RF) bursts ofone data block (frame) from the servicing base station. The RF burst carries a number of modulated symbols. The training sequence is extracted from the RF burst and is made of a number of modulated symbols. The training sequences are first processed assuming a first modulation format to produce a first accumulated channel energy. Then, the training sequences are processed assuming a second modulation format to produce a second accumulated channel energy. The first and second accumulated channel energies are compared to determine which accumulated channel energy is greater. The modulation format of the data block is identified as the modulation format corresponding to the greater accumulated channel energy.

Abstract translation: 识别由蜂窝无线通信系统中的无线终端从服务基站接收的数据块（帧）的调制格式。 这涉及首先从服务基站接收数据块（帧）的数个射频（RF）突发。 RF突发携带多个调制符号。 从RF突发中提取训练序列，并且由多个调制符号组成。 首先按照第一调制格式对训练序列进行处理，以产生第一累积的信道能量。 然后，采用第二调制格式处理训练序列，以产生第二累积的信道能量。 比较第一和第二累积通道能量以确定哪个累积通道能量较大。 数据块的调制格式被识别为对应于较大的累积通道能量的调制格式。

公开(公告)号：US20040091273A1

公开(公告)日：2004-05-13

申请号：US10025795

申请日：2001-12-26

Inventor： Patrice Brissette ,  Sandy A. Thomson

IPC: G06F011/00 ,  H04B010/02

CPC classification number: H04L1/208 ,  H04L1/0045 ,  H04L1/0047 ,  H04L25/063

Abstract: A data regenerator for regenerating a data signal, including a convertor for converting a received data signal into a binary data signal in dependence on conversion parameters, an error corrector for correcting errors in the binary data signal based on error correction code contained in the binary data signal to produce a corrected binary data signal, and a performance monitor for comparing the corrected binary data signal with an uncorrected representation of the binary data signal to determine information about the relative number of logicnull1nulls and logic null0nulls that have been corrected by the error corrector and output a feedback signal representative of the relative number, wherein the convertor adjusts at least some of the conversion parameters in dependance on the feedback signal.

Abstract translation: 一种用于再生数据信号的数据再生器，包括用于根据转换参数将接收的数据信号转换为二进制数据信号的转换器，用于根据包含在二进制数据中的纠错码校正二进制数据信号中的错误的纠错器 信号以产生校正的二进制数据信号，以及性能监视器，用于将校正的二进制数据信号与二进制数据信号的未校正表示进行比较，以确定关于具有的逻辑“1”和逻辑“0”的相对数量的信息 由误差校正器校正并输出代表相对数的反馈信号，其中转换器根据反馈信号调整至少一些转换参数。

公开(公告)号：US20030219069A1

公开(公告)日：2003-11-27

申请号：US10236414

申请日：2002-09-06

Inventor： Ernest C. Chen ,  Chinh Tran

IPC: H04Q001/20 ,  H04B003/46 ,  H04L001/00

CPC classification number: H04B7/18515 ,  H04B7/1851 ,  H04B7/18526 ,  H04B17/318 ,  H04L1/20 ,  H04L1/206 ,  H04L1/208 ,  H04L27/183 ,  H04L27/227 ,  H04L27/366 ,  H04L2027/0061

Abstract: Systems and methods are presented for measuring power levels of primary and interfering signals as well as noise, particularly for satellite transmitted signals. A typical method comprises the steps of receiving a signal comprising a primary signal, an interference signal and noise, demodulating the primary signal to remove a carrier frequency, decoding the primary signal to obtain symbols, estimating a power level of the primary signal based upon the demodulated and decoded primary signal. Additionally, an ideal primary signal can be generated from the carrier power and frequency and the symbols and subtracted from the received signal to produce the noise and interference signal. The noise and interference power is then estimated from the noise and interference signal.

Abstract translation: 提出了系统和方法，用于测量主要和干扰信号的功率水平以及噪声，特别是卫星发射信号的噪声。 典型的方法包括以下步骤：接收包括主信号，干扰信号和噪声的信号，解调主信号以去除载波频率，解码主信号以获得符号，基于该信号估计主信号的功率电平 解调和解码的主信号。 此外，理想的主信号可以从载波功率和频率以及符号生成，并从接收信号中减去产生噪声和干扰信号。 然后从噪声和干扰信号估计噪声和干扰功率。

公开(公告)号：US06487185B1

公开(公告)日：2002-11-26

申请号：US09346927

申请日：1999-07-02

Applicant: Mark Burton

Inventor： Mark Burton

IPC: H04Q700

CPC classification number: H04L1/201 ,  H04L1/20 ,  H04L1/208

Abstract: A method of improving frame erasure performance, in particular for slow frequency hopping channels with cyclic co-channel interference, by selection of the most suitable PBER threshold from a range of PBER thresholds. A burst quality metric is assigned to each burst in a frame and the bursts are then ranked in the order of the values of the assigned quality metrics. The differences in the metrics between successive bursts in the ranked order are measured. The position in the ranked order of the largest difference between bursts (dMAX) is used in the selection of the most suitable PBER threshold.

Abstract translation: 一种改进帧擦除性能的方法，特别是对于具有循环同频道干扰的慢跳频信道，通过从一定范围的PBER阈值中选择最合适的PBER阈值。 突发质量度量被分配给帧中的每个突发，然后按照分配的质量度量的值的顺序对突发进行排序。 测量在排序顺序中的连续突发之间的度量的差异。 在最合适的PBER阈值的选择中使用脉冲串（dMAX）之间最大差异的排序顺序的位置。

公开(公告)号：US06426981B1

公开(公告)日：2002-07-30

申请号：US09264916

申请日：1999-03-09

Applicant: Jacques Galbrun

Inventor： Jacques Galbrun

IPC: H03D100

CPC classification number: H04L27/2647 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0065 ,  H04L1/208 ,  H04N5/4401 ,  H04N5/455 ,  H04N21/4382 ,  H04N21/6112

Abstract: The soft decisions associated with the quadrature digital signals received are calculated on the basis of at least one parametric law slaved to the minimum value of the rate of erroneous bits. The value is determined at the output of a Viterbi decoder in a microcontroller by varying the parameter of the law. The approach may be applied to applications including terrestrial digital broadcasting according to the DVB-T standard using OFDM modulation.

Abstract translation: 基于接收到的正交数字信号的软判决是基于从属于错误比特率的最小值的至少一个参数律来计算的。 通过改变法律参数，在微控制器中的维特比解码器的输出端确定该值。 该方法可以应用于包括使用OFDM调制的DVB-T标准的地面数字广播的应用。