公开(公告)号：US20060133290A1

公开(公告)日：2006-06-22

申请号：US11019333

申请日：2004-12-21

申请人： Bengt Lindoff ,  Johan Nilsson ,  Peter Malm

发明人： Bengt Lindoff ,  Johan Nilsson ,  Peter Malm

IPC分类号： H04L12/26 ,  H04Q7/24

CPC分类号： H04L1/1692 ,  H04L2001/125

摘要： Improved ACK/NACK detection in a mobile terminal of a wireless communication system is disclosed. The ACK/NACK detection uses knowledge about the power of the acknowledgment/negative acknowledgment signal along with the probability that a DTX will occur to increase the probability that the ACK signal will be correctly detected. The probability that a DTX will occur is determined by observing the transmit power commands issued to the mobile terminal. A high number of power up commands relative to power down commands may indicate a poor quality uplink meaning that a DTX is likely to occur. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

摘要翻译： 公开了在无线通信系统的移动终端中的改进的ACK / NACK检测。 ACK / NACK检测使用关于确认/否定确认信号的功率的知识以及DTX将发生的概率来增加ACK信号将被正确检测的概率。 通过观察发给移动终端的发射功率命令来确定DTX发生的概率。 相对于掉电命令的大量加电命令可以指示质量差的上行链路意味着DTX可能发生。 提交本摘要的理解是，它不会用于解释或限制权利要求的范围或含义。

公开(公告)号：US07154966B2

公开(公告)日：2006-12-26

申请号：US10609917

申请日：2003-06-30

申请人： Peter Malm ,  Bengt Lindoff ,  Andreas Cedergren

发明人： Peter Malm ,  Bengt Lindoff ,  Andreas Cedergren

IPC分类号： H03D1/00

CPC分类号： H04L25/061 ,  H04B2201/709727 ,  H04L27/3809

摘要： A method and system are described for performing fast and simple M-QAM detection on received signals, such as a 16-QAM signal, by estimating M-QAM symbol constellation decision boundaries. Amplitude information is collected for in-phase and quadrature phase components of the received signal over a number of symbols. An average of the absolute value of the amplitude information of the in-phase components and of the quadrature phase components is determined over the number of symbols. The determined average absolute values of the in-phase and quadrature phase components provide a reference to produce the decision boundary estimates. Bias compensation may optionally be applied to the decision boundary estimates based on the estimated signal-to-interference ratio (“SIR”) of the received signal to produce bias corrected decision boundary estimates.

摘要翻译： 描述了一种方法和系统，用于通过估计M-QAM符号星座决定边界来对接收信号（例如16-QAM信号）进行快速和简单的M-QAM检测。 通过多个符号收集接收信号的同相和正交相位分量的幅度信息。 确定同相分量和正交相位分量的幅度信息的绝对值的平均值，符号数目。 确定的同相和正交相位分量的平均绝对值提供了产生决策边界估计的参考。 基于估计的接收信号的信号干扰比（“SIR”），可以将偏置补偿可选地应用于判定边界估计，以产生偏置校正的判定边界估计。

公开(公告)号：US07046720B2

公开(公告)日：2006-05-16

申请号：US10011571

申请日：2001-11-12

申请人： Bengt Lindoff ,  Peter Malm

发明人： Bengt Lindoff ,  Peter Malm

IPC分类号： H04B1/69 ,  H04B1/707 ,  H04B1/713

CPC分类号： H04B1/7101 ,  H04B1/7115 ,  H04B2201/70701 ,  H04L25/0206 ,  H04L25/0214 ,  H04L25/0228 ,  H04L25/062

摘要： A system and method for DC offset compensation wherein a received first signal is despread using a first spreading code to generate a second signal. The second signal along with a first set of pilot symbols is used to estimate a radio channel. The first signal is also despread using a second spreading code to generate a third signal. A DC offset is estimated from the third signal, the estimated radio channel and a second set of pilot symbols. The estimated DC offset may then be subtracted from the second signal.

公开(公告)号：US06700882B1

公开(公告)日：2004-03-02

申请号：US09534629

申请日：2000-03-27

申请人： Bengt Lindoff ,  Peter Malm

发明人： Bengt Lindoff ,  Peter Malm

IPC分类号： H04B7212

CPC分类号： H04B7/2643 ,  H04B7/0613

摘要： In accordance with exemplary embodiments of the invention, throughput and capacity in a TDMA system are increased using several different channels all operating simultaneously on the same carrier frequency. In a first embodiment, a base station in a cell in the system simultaneously transmits a different information sequence from each antenna of a transmitter, on the same carrier frequency. Mobile stations in the cell each receive the signals from the base station antennas as a composite signal, and then use known synchronization information to extract a desired information sequence from the composite signal. In a second embodiment, the different information sequences are all intended for the same mobile station, which uses the synchronization information to extract each sequence from the composite signal. In a third embodiment of the invention, the base station simultaneously transmits identical information sequences to a mobile station via different antennas. The mobile station uses the resulting space diversity effect to obtain diversity gain that enables an increase in the number of channels per area-unit, and thus an increase in traffic and spectrum efficiency. The system can also dynamically employ these to effectively respond to changing demands for communications services within the system.

摘要翻译： 根据本发明的示例性实施例，使用在同一载波频率上同时工作的多个不同信道来增加TDMA系统中的吞吐量和容量。 在第一实施例中，系统中的小区中的基站在相同的载波频率上同时从发射机的每个天线发送不同的信息序列。 小区中的移动站各自从基站天线接收信号作为复合信号，然后使用已知的同步信息从复合信号中提取期望的信息序列。 在第二实施例中，不同的信息序列全部用于同一移动台，其使用同步信息从复合信号中提取每个序列。 在本发明的第三实施例中，基站通过不同的天线同时向移动台发送相同的信息序列。 移动台使用得到的空间分集效应来获得能够增加每个区域单元的信道数量的分集增益，从而增加业务量和频谱效率。 系统还可以动态地采用这些来有效地响应系统内对通信服务的不断变化的需求。

公开(公告)号：US07583760B2

公开(公告)日：2009-09-01

申请号：US10535479

申请日：2003-10-09

申请人： Bo Bernhardsson ,  Bengt Lindoff ,  Peter Malm

发明人： Bo Bernhardsson ,  Bengt Lindoff ,  Peter Malm

IPC分类号： H03D1/00 ,  H03M13/05

CPC分类号： H04L1/0045 ,  H04L1/18 ,  H04L25/067 ,  H04L27/38

摘要： Method of, and arrangement and device for, decoding a communications signal in a digital communications system, where the communications signal is modulated according to a modulation scheme including amplitude information; generating a likelihood value for a received communications signal, decoding the communications signal based on at least the generated likelihood value, providing a reliability indication of the amplitude information conveyed by the received communications signal wherein the step of generating the likelihood value further comprises generating the likelihood value on the basis of the provided reliability indication of the amplitude information.

摘要翻译： 根据包括幅度信息的调制方式对通信信号进行调制的数字通信系统中对通信信号进行解码的方法和装置和装置; 生成接收到的通信信号的似然值，至少基于所生成的似然值对通信信号进行解码，提供由接收的通信信号传送的幅度信息的可靠性指示，其中生成似然值的步骤进一步包括产生似然值 基于所提供的幅度信息的可靠性指示值。

公开(公告)号：US20060126761A1

公开(公告)日：2006-06-15

申请号：US10535479

申请日：2003-10-09

申请人： Bo Bernhardsson ,  Bengt Lindoff ,  Peter Malm

发明人： Bo Bernhardsson ,  Bengt Lindoff ,  Peter Malm

IPC分类号： H04L27/06

CPC分类号： H04L1/0045 ,  H04L1/18 ,  H04L25/067 ,  H04L27/38

摘要： A method of decoding a communications signal in a digital communications system, where the communications signal is modulated according to a modulation scheme, such as 16-QAM, including amplitude information. The method comprises the steps of generating (406) a likelihood value for a received communications signal; decoding (408) the communications signal based on at least the generated likelihood value. The method further comprises providing (302) a reliability indication of the amplitude information conveyed by the received communications signal; and generating the likelihood value on the basis of the provided reliability indication of the amplitude information.

摘要翻译： 一种在数字通信系统中对通信信号进行解码的方法，其中通信信号根据包括幅度信息的诸如16-QAM的调制方案进行调制。 该方法包括以下步骤：产生（406）接收到的通信信号的似然值; 至少基于所生成的似然值对通信信号进行解码（408）。 该方法还包括提供（302）由所接收的通信信号传送的幅度信息的可靠性指示; 以及基于所提供的幅度信息的可靠性指示来生成似然值。

公开(公告)号：US20070076785A1

公开(公告)日：2007-04-05

申请号：US11241680

申请日：2005-09-30

申请人： Andres Reial ,  Peter Malm

发明人： Andres Reial ,  Peter Malm

IPC分类号： H04B1/00

CPC分类号： H04B1/712 ,  H04B1/7117 ,  H04B2201/70701 ,  H04B2201/709727

摘要： A method for use in receiving a spread-spectrum signal includes receiving an input signal. The input signal includes a first plurality of multipath components. The method also includes despreading the first plurality of multipath components. The step of despreading includes computing a plurality of corresponding delays. The method also includes computing a plurality of combining weights based, at least in part, on interference correlation between at least two of the first plurality of multipath components, selecting, according to at least one criterion, a subset of the plurality of combining weights, and despreading and combining a second plurality of multipath components using at least one quantity related to the selected plurality of combining weights and a plurality of delays and multipath components corresponding to the plurality of selected combining weights. This Abstract is provided to comply with rules requiring an Abstract that allows a searcher or other reader to quickly ascertain subject matter of the technical disclosure. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

摘要翻译： 一种用于接收扩频信号的方法包括接收输入信号。 输入信号包括第一多个多径分量。 该方法还包括解扩第一多个多路径分量。 解扩的步骤包括计算多个对应的延迟。 该方法还包括至少部分地基于第一多个多径分量中的至少两个之间的干扰相关来计算多个组合加权，根据至少一个准则，选择多个组合权重的子集， 以及使用与所选择的多个组合权重相关的至少一个数量和对应于所述多个选择的组合权重的多个延迟和多径分量来解扩和组合第二多个多径分量。 提供本摘要以符合要求摘要的规则，允许搜索者或其他读者快速确定技术公开内容的主题。 提交本摘要的理解是，它不会用于解释或限制权利要求的范围或含义。 37 CFR 1.72（b）。

公开(公告)号：US07746961B2

公开(公告)日：2010-06-29

申请号：US11279287

申请日：2006-04-11

申请人： Andres Reial ,  Peter Malm

发明人： Andres Reial ,  Peter Malm

IPC分类号： H04L27/06

CPC分类号： H04B1/70755 ,  H04B1/7077

摘要： Hypothesis tests, such as maximum likelihood detections, are executed on symbol sequences received by, for example, a user equipment (UE) in a communication system. The hypothesis tester checks a received sequence against a group of predetermined sequences that possibly could have been sent to the UE. For received sequences that are matched or not matched by the hypothesis tester with high confidence, complete decoding, for example, with a Viterbi decoder, is not necessary. Instead, complete decoding is used as a “tie-breaker” for those sequences which the hypothesis tester cannot match or not match with desired confidence levels.

摘要翻译： 在例如通信系统中的用户设备（UE）接收的符号序列上执行诸如最大似然检测的假设检验。 假设测试者根据可能已经发送给UE的一组预定序列来检查接收到的序列。 对于具有高置信度的假设检验者匹配或不匹配的接收序列，例如使用维特比解码器，完全解码是不必要的。 相反，完全解码被用作假设检验者不能匹配或不符合期望置信水平的那些序列的“断路器”。

公开(公告)号：US20050201484A1

公开(公告)日：2005-09-15

申请号：US10506913

申请日：2003-02-26

申请人： Leif Wilhelmsson ,  Peter Malm

发明人： Leif Wilhelmsson ,  Peter Malm

IPC分类号： H03M13/25 ,  H04L1/00 ,  H04L25/06 ,  H04L25/34

CPC分类号： H04L27/38 ,  H04L25/067

摘要： A sub-optimal method is disclosed for calculating the reliability values (soft values) for the bits of a multilevel signal. The log-likelihood values are approximated using only the dominant terms, so called max-log approximation, that is for each bit position only the two closest signal symbols of opposite bit value (S8,S6) are considered in the sum. The used modulation scheme is 16-QAM together with Gray-labelling. Two versions of approximation are proposed: one version consists of using the two distances between the received value and the two closest symbols of opposite bit value (δ1, δ2). In order to simplify and speed up the calculation, the second version consists of using the distance between the two closest symbols (δ3) to approximate the distance between the second closest symbol and the received value. Furthermore, precalculated results are stored in look-up tables to speed up the calculation. Possible applications are especially bit interleaved coded modulation (BICM) together with soft-input decoding. It is also of interest for TCM and BCM schemes.

摘要翻译： 公开了一种用于计算多电平信号的位的可靠性值（软值）的次优方法。 对数似然值仅使用主要术语近似，所谓的最大对数近似，即对于每个比特位置，只有相对比特值的两个最近的信号符号（S S，S > 8 ）。 所使用的调制方案是16-QAM和Gray标签。 提出了两个近似版本：一个版本包括使用接收值和相对位值（delta 1，2，2）之间的两个最接近的符号之间的两个距离。 为了简化和加速计算，第二版本包括使用两个最接近的符号（delta 3）之间的距离来近似第二个最接近的符号与接收的值之间的距离。 此外，预先计算的结果存储在查找表中以加快计算。 可能的应用是软交织编码调制（BICM）以及软输入解码。 也是TCM和BCM方案的兴趣。

公开(公告)号：US20050138530A1

公开(公告)日：2005-06-23

申请号：US10911297

申请日：2004-08-04

申请人： Wensheng Huang ,  Raymond Toy ,  Peter Malm

发明人： Wensheng Huang ,  Raymond Toy ,  Peter Malm

IPC分类号： H03M7/30 ,  H03M13/41 ,  H03M13/45 ,  H04L1/18 ,  H04L29/06 ,  H04L29/08 ,  H03M13/00

CPC分类号： H04L69/04 ,  H03M7/30 ,  H03M13/6306 ,  H03M13/6312 ,  H03M13/6362 ,  H03M13/6505 ,  H04L1/1819 ,  H04L1/1835 ,  H04L1/1845 ,  H04L29/06 ,  H04L69/324

摘要： In a packet-based data transmission including incremental redundancy (IR) protocols, the memory consumption of the IR protocol is reduced by compressing and storing failed data units in their punctured format. The failed data units are compressed using low complexity compression/decompression algorithms. The compression algorithm includes two parts: calculating and storing a scale factor for each transmission burst that estimates the soft values in the burst, and storing each soft values' sign in local memory instead of the complete soft value. If the currently received data unit is a retransmission, its compressed versions in the punctured format stored in the IR memory are decompressed, de-punctured and combined with the currently received data unit. The combined data unit is then decoded. The decompression restores an estimated soft-value by multiplying the sign value stored in the IR memory with its corresponding scale factor obtained from a mapping table.

摘要翻译： 在包括增量冗余（IR）协议的基于分组的数据传输中，通过以破坏的格式压缩和存储失败的数据单元来减少IR协议的存储器消耗。 使用低复杂度压缩/解压缩算法压缩失败的数据单元。 压缩算法包括两部分：计算和存储用于估计突发中的软值的每个传输突发的比例因子，并将每个软值的符号存储在本地存储器中，而不是完整的软值。 如果当前接收到的数据单元是重传，则其存储在IR存储器中的打孔格式的压缩版本被解压缩，去穿孔并与当前接收的数据单元组合。 然后对组合的数据单元进行解码。 解压缩通过将存储在IR存储器中的符号值与从映射表获得的相应缩放因子相乘来恢复估计的软值。