公开(公告)号：US20050190800A1

公开(公告)日：2005-09-01

申请号：US10742015

申请日：2003-12-17

Applicant: Alexander Maltsev ,  Ali Sadri ,  Alexei Davydov

Inventor： Alexander Maltsev ,  Ali Sadri ,  Alexei Davydov

IPC: H04L1/00 ,  H04L1/20 ,  H04L25/02 ,  H04L27/26 ,  H04J3/22

CPC classification number: H04L1/20 ,  H04L1/0001 ,  H04L1/0045 ,  H04L1/0071 ,  H04L1/208 ,  H04L27/2608 ,  H04L27/2647

Abstract: Noise power is estimated for subcarriers in a multicarrier system by first decoding a received multicarrier signal and then using the decoded signal information and the received signal information to perform the estimation. Soft decision or hard decision decoding may be used. In at least one embodiment, channel estimates are also made using the decoded signal information and the received signal information.

Abstract translation: 通过首先解码接收的多载波信号，然后使用解码信号信息和接收到的信号信息来执行估计，对多载波系统中的子载波估计噪声功率。 可以使用软判决或硬判决解码。 在至少一个实施例中，还使用解码信号信息和接收到的信号信息进行信道估计。

公开(公告)号：US20050154967A1

公开(公告)日：2005-07-14

申请号：US10511401

申请日：2003-04-09

Applicant: Seo Heo ,  Jeongsoon Park ,  Saul Gelfand ,  Ivonete Markman

Inventor： Seo Heo ,  Jeongsoon Park ,  Saul Gelfand ,  Ivonete Markman

IPC: H03M13/25 ,  H03M13/41 ,  H04B7/005 ,  H04L1/00 ,  H04L25/03 ,  H04N5/00 ,  H04N5/21 ,  H04N5/44 ,  H04N21/438 ,  H03M13/03

CPC classification number: H04N21/4382 ,  H03M13/256 ,  H03M13/3746 ,  H03M13/6331 ,  H04L1/0055 ,  H04L1/006 ,  H04L1/208 ,  H04L25/03057 ,  H04L2025/03382 ,  H04L2025/0349 ,  H04L2025/037 ,  H04L2025/03732 ,  H04N5/211 ,  H04N5/4401

Abstract: A concatenated equalizer/trellis decoding system for use in processing a High Definition Television signal. The re-encoded trellis decoder output, rather than the equalizer output, is used as an input to the feedback filter of the decision feedback equalizer. Hard or soft decision trellis decoding may be applied. In order to account for the latency associated with trellis decoding and the presence of twelve interleaved decoders, feedback from the trellis decoder to the equalizer is performed by replicating the trellis decoder and equalizer hardware in a module that can be cascaded in as many stages as needed to achieve the desired balance between complexity and performance. The present system offers an improvement of between 0.6 and 1.9 decibels. Cascading of two modules is usually sufficient to achieve most of the potential performance improvement.

Abstract translation: 用于处理高分辨率电视信号的级联均衡器/网格解码系统。 重新编码的网格解码器输出，而不是均衡器输出，被用作决策反馈均衡器的反馈滤波器的输入。 可以应用硬或软决策网格解码。 为了解决与网格解码相关联的延迟和存在十二个交错解码器，从网格解码器到均衡器的反馈是通过将网格解码器和均衡器硬件复制到可以根据需要在多个阶段级联的模块中来执行的 以实现复杂性和性能之间的期望平衡。 本系统提供了0.6到1.9分贝之间的改进。 两个模块的级联通常足以实现大部分潜在的性能提升。

公开(公告)号：US20050141627A1

公开(公告)日：2005-06-30

申请号：US10995946

申请日：2004-11-22

Applicant: Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

Inventor： Glenn Walker ,  Eric Dibiaso ,  Michael Hiatt

IPC: H04H1/00 ,  H04H20/28 ,  H04H20/42 ,  H04H20/51 ,  H04H20/74 ,  H04H40/90 ,  H04L1/00 ,  H04L5/16 ,  H04L27/18 ,  H04L27/26 ,  H04L27/34

CPC classification number: H04L1/005 ,  H04H20/28 ,  H04H20/42 ,  H04H20/51 ,  H04H20/74 ,  H04H40/90 ,  H04L1/0066 ,  H04L1/0071 ,  H04L1/208 ,  H04L27/183 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/2647 ,  H04L27/3488

Abstract: The present invention involves a method for transmitting data using an orthogonal frequency division multiplex (OFDM) transmission system, such as over a terrestrial network used in satellite digital audio radio. A OFDM signal is generated based on first input data. A variation is introduced in the OFDM signal based on second input data to generate a modified OFDM signal which is transmitted. The modified OFDM signal is decoded by performing a demodulation of the modified OFDM signal then a first and second detection to obtain the first input data and the second input data. The introduction of a variance may include introducing an additional phase offset across adjacent OFDM sub-carriers, across adjacent OFDM symbols, an additional phase offset in the OFDM signal, an additional amplitude offset in the OFDM signal, an additional amplitude augmentation in the OFDM signal, and/or a second variation in the first OFDM signal based on third input data.

Abstract translation: 本发明涉及一种使用正交频分多路复用（OFDM）传输系统来发送数据的方法，例如通过卫星数字音频无线电中使用的地面网络。 基于第一输入数据生成OFDM信号。 基于第二输入数据在OFDM信号中引入变化以产生被发送的经修改的OFDM信号。 通过对经修改的OFDM信号进行解调，然后对第一和第二检测进行解调，以获得第一输入数据和第二输入数据，对经修改的OFDM信号进行解码。 引入方差可以包括在相邻OFDM符号之间跨越相邻OFDM子载波引入附加相位偏移，OFDM信号中的附加相位偏移，OFDM信号中的附加振幅偏移，OFDM信号中的附加幅度增大 ，和/或基于第三输入数据的第一OFDM信号中的第二变型。

公开(公告)号：US20040253927A1

公开(公告)日：2004-12-16

申请号：US10828043

申请日：2004-04-20

Inventor： Xiaoxin Qiu

IPC: H04Q007/20

CPC classification number: H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0072 ,  H04L1/0075 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L25/03318 ,  H04L25/067 ,  H04L2025/03401

Abstract: RF communications received by a wireless terminal from a servicing base station are used to determine the downlink quality report and implement link adaptation decisions. This involves first implementing an initial transmission scheme between the servicing base station and the wireless terminal. Next, a current downlink quality report corresponding to the initial transmission scheme is generated by the wireless terminal and received at the servicing base station. This downlink quality report is based in whole or in part on a bit-error probability (BEP). The current downlink quality report that corresponds to the initial transmission scheme is then compared to link adaptation thresholds. When the current downlink quality report compares unfavorably to the link adaptation thresholds, an alternative transmission scheme is selected and implemented between the servicing base station and the wireless terminals if the alternative transmission scheme is expected to result in an improved downlink quality report over the current down-link quality report.

Abstract translation: 使用无线终端从服务基站接收的RF通信来确定下行链路质量报告并实现链路适配决定。 这涉及首先在服务基站和无线终端之间实现初始传输方案。 接下来，由无线终端产生与初始传输方案对应的当前下行链路质量报告，并在服务基站接收。 该下行链路质量报告全部或部分基于比特误差概率（BEP）。 然后将对应于初始传输方案的当前下行链路质量报告与链路适配阈值进行比较。 当当前的下行链路质量报告与链路自适应阈值不利地比较时，如果期望替代传输方案导致当前向下的改进的下行链路质量报告，则在服务基站和无线终端之间选择并实现替代传输方案 链接质量报告。

公开(公告)号：US20040252787A1

公开(公告)日：2004-12-16

申请号：US10786376

申请日：2004-02-25

Inventor： Baoguo Yang ,  Nelson R. Sollenberger

IPC: H04L025/06 ,  H04L025/10 ,  H04L027/14 ,  H04L027/16 ,  H04L027/22

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：US06792053B1

公开(公告)日：2004-09-14

申请号：US09423391

申请日：1999-11-08

Applicant: Janne Vainio ,  Hannu Mikkola ,  Arto Saikanmäki

Inventor： Janne Vainio ,  Hannu Mikkola ,  Arto Saikanmäki

IPC: H03D100

CPC classification number: H04L1/208 ,  H04L1/20

Abstract: The invention relates to a method for estimating a channel bit error ratio in a receiver, and to a receiver. In the method, a pseudo bit error ratio of a channel is determined. The receiver (114) comprises detecting means (202, 204, 206, 208) for detecting a data sequence of a received signal; decoding means (302) for decoding a first encoding of the detected data signal; and re-encoding meant (310) for re-encoding with the first encoding the data sequence decoded from the first encoding. The receiver (114) of the invention further comprises quality determining means (304) for providing the detected data sequence with a value for quality, and estimating means (308) for estimating the bit error ratio-provided that the quality of the detected data sequence fulfils a predetermined quality requirement by comparing the detected data sequence with the data sequence re-encoded with first encoding. The first encoding is typically a convolution coding. One way in which quality can be determined is to decode the second encoding which is, for example, a cyclic redundancy check.

Abstract translation: 本发明涉及一种用于估计接收机中的信道比特误码率和接收机的方法。 在该方法中，确定信道的伪比特误码率。 接收器（114）包括用于检测接收信号的数据序列的检测装置（202,204,206,208）; 解码装置（302），用于解码检测到的数据信号的第一编码; 并且重新编码意味着（310）用于对从第一编码解码的数据序列进行第一编码的重新编码。 本发明的接收机（114）还包括用于向检测数据序列提供质量值的质量确定装置（304）和用于估计误码率的估计装置（308），只要检测数据序列的质量 通过将检测到的数据序列与用第一编码重新编码的数据序列进行比较来满足预定的质量要求。 第一编码通常是卷积编码。 可以确定质量的一种方式是解码例如循环冗余校验的第二编码。

公开(公告)号：US06539205B1

公开(公告)日：2003-03-25

申请号：US09046060

申请日：1998-03-23

Applicant: Yongbing Wan ,  Jaleh Komaili

Inventor： Yongbing Wan ,  Jaleh Komaili

IPC: H04B1700

CPC classification number: H04L1/208 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/20

Abstract: A method and apparatus for effectively monitoring quality of a traffic channel in a communication, and in response, modifying transmission coding or data transmission rates, or both, improves communication quality and increases data transfers rates in digital wireless communication systems. A channel quality estimator determines and evaluates the bit error rate (BER) of a signal on a control channel and estimates the quality of the traffic channel based on the quality of the control channel signal. Accordingly, the processing and control circuitry of either a mobile station or base station adjusts the error correction applied to traffic channel transmissions. The traffic channel data transmission rate may also be modified based on the control channel signal quality.

Abstract translation: 一种用于有效监测通信中业务信道质量的方法和装置，并且作为响应，修改传输编码或数据传输速率或两者，提高了数字无线通信系统中的通信质量并提高了数据传输速率。 信道质量估计器确定和评估控制信道上的信号的误码率（BER），并且基于控制信道信号的质量估计业务信道的质量。 因此，移动台或基站的处理和控制电路调整应用于业务信道传输的纠错。 还可以基于控制信道信号质量修改业务信道数据传输速率。

公开(公告)号：US20020102942A1

公开(公告)日：2002-08-01

申请号：US09989256

申请日：2001-11-20

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

IPC: H04B017/00

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. FIG. 1

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。 1

公开(公告)号：US06366778B1

公开(公告)日：2002-04-02

申请号：US09360296

申请日：1999-07-22

Applicant: Paul E. Bender ,  Roberto Padovani

Inventor： Paul E. Bender ,  Roberto Padovani

IPC: H04Q720

CPC classification number: H04L1/0071 ,  H04L1/0002 ,  H04L1/0025 ,  H04L1/0059 ,  H04L1/0068 ,  H04L1/208 ,  H04W36/18 ,  H04W36/30 ,  H04W52/24 ,  H04W52/241 ,  H04W52/40 ,  H04W52/44 ,  H04W52/58 ,  H04W52/60 ,  H04W56/00 ,  H04W68/00

Abstract: A method and apparatus for controlling the transmit power levels of first and second base station transceivers, wherein the first and second base station transceivers are respectively associated with first and second sectors of a cell. The received signal strength of a communication signal arriving at the mobile station is initially determined. A power control value that is based on the received signal strength is then transmitted from the mobile station to the first and second base station transceivers. A first received power control value is next generated by attempting to receive the transmitted power control value at the first base station transceiver, and a second received power control value is generated by attempting to receive the transmitted power control value at the second base station transceiver. A common transmit power value is calculated at a base station controller for the first and second base station transceivers when the first and second received power control values are unequal. The communication signal is then transmitted from the first and second base station transceivers in accordance with the common transmit power value.

Abstract translation: 一种用于控制第一和第二基站收发机的发射功率电平的方法和装置，其中第一和第二基站收发机分别与小区的第一和第二扇区相关联。 初始确定到达移动台的通信信号的接收信号强度。 然后，基于接收信号强度的功率控制值从移动台发送到第一和第二基站收发器。 接下来通过尝试在第一基站收发信机处接收发送的功率控制值来产生第一接收功率控制值，并且通过尝试在第二基站收发信机处接收发射功率控制值来产生第二接收功率控制值。 当第一和第二接收功率控制值不相等时，在基站控制器处为第一和第二基站收发机计算公共发射功率值。 然后根据公共发射功率值从第一和第二基站收发机发送通信信号。

公开(公告)号：US6134278A

公开(公告)日：2000-10-17

申请号：US16675

申请日：1998-01-30

Applicant: Farrokh Abrishamkar ,  Jaehyeong Kim ,  Zulfiquar Sayeed

Inventor： Farrokh Abrishamkar ,  Jaehyeong Kim ,  Zulfiquar Sayeed

IPC: H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H03D1/00 ,  H04B3/46 ,  H04B17/00 ,  H04L27/06 ,  H04Q1/20

CPC classification number: H04L1/208 ,  H04B1/707 ,  H04L1/0046 ,  H04L1/0054 ,  H04L1/08 ,  H04B2201/70705 ,  H04L1/0071

Abstract: Techniques for more accurately detecting the data rate of a frame of data in a cellular telephone system are described. Data is preferably received at one of four rates: full, half, quarter and eighth. A correlation is performed between the incoming soft data and the data generated by re-encoding and re-repeating the data. Variations on the approach make it readily possible to accurately perform rateset 1 or rateset 2 rate detection.

Abstract translation: 描述了用于更准确地检测蜂窝电话系统中的数据帧的数据速率的技术。 数据优选地以四种速率之一接收：全，半，四分之一和八分之一。 在进入的软数据和通过重新编码产生的数据和重复数据之间执行相关性。 方法的变化使得可以准确地执行速率1或速率2速率检测。