公开(公告)号：US20060239182A1

公开(公告)日：2006-10-26

申请号：US11472862

申请日：2006-06-21

Applicant: Stein Lundby

Inventor： Stein Lundby

IPC: H04J11/00

CPC classification number: H04J13/0048 ,  H04B2201/70705 ,  H04J13/18

Abstract: Methods and apparatus to improve the speed and reliability of decoders are presented herein. Namely, a priori knowledge of Walsh space information is used to increase the speed at which messages are decoded. In systems where control messages contain transmission parameters of concurrently transmitted packet data, a faster demodulation and decoding of control messages allows a receiver to demodulate the packet data sooner, so that a shorter buffer is needed to store the received packet data. The receiver uses the Walsh space from the previous successfully decoded message to first decode the current message. If the decoding attempt is unsuccessful, the receiver then uses a neighboring Walsh space to decode the current message.

公开(公告)号：US07075973B2

公开(公告)日：2006-07-11

申请号：US10731456

申请日：2003-12-09

Applicant: Alexander Reznik ,  Ariela Zeira

Inventor： Alexander Reznik ,  Ariela Zeira

IPC: H04B1/69

CPC classification number: H04B1/7103 ,  H04B1/71055 ,  H04B2001/71077 ,  H04B2201/70705

Abstract: A first detector receives a received signal and extracts the data signals from the received signal. A hard decision converter converts soft symbols outputted by the first detector into hard symbols. An interference canceller extracts the voice signals from the received signal. A second detector is connected to the output of the interference canceller, and extracts the individual voice signals. The second detector is a different detector type than the first detector.

Abstract translation: 第一检测器接收接收信号并从接收信号中提取数据信号。 硬判决转换器将由第一检测器输出的软符号转换为硬符号。 干扰消除器从接收到的信号中提取语音信号。 第二检测器连接到干扰消除器的输出，并提取各个声音信号。 第二检测器是与第一检测器不同的检测器类型。

公开(公告)号：US07065055B1

公开(公告)日：2006-06-20

申请号：US09665200

申请日：2000-09-18

Applicant: Jonas Karlsson ,  Riaz Esmailzadeh

Inventor： Jonas Karlsson ,  Riaz Esmailzadeh

IPC: H04B1/44

CPC classification number: H04B1/7103 ,  H04B1/7107 ,  H04B2201/70705 ,  H04B2201/70707

Abstract: Method and apparatus for minimizing the processing delay incurred by an IC receiver over conventional receivers in a CDMA cellular system are disclosed. The method and apparatus involve operating the conventional receiver and the IC receiver in parallel to each other. Data from the conventional receiver are then used to supplement data from the IC receiver in order to minimize the delays incurred by the IC receiver.

Abstract translation: 公开了一种用于最小化IC接收机在CDMA蜂窝系统中的常规接收机所引起的处理延迟的方法和装置。 所述方法和装置包括相互并行地操作常规接收器和IC接收器。 然后使用来自常规接收机的数据来补充来自IC接收机的数据，以便最小化由IC接收器引起的延迟。

公开(公告)号：US07023901B2

公开(公告)日：2006-04-04

申请号：US10007153

申请日：2001-12-04

Applicant: Aris Papasakellariou

Inventor： Aris Papasakellariou

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

CPC classification number: H04B1/7115 ,  H04B1/712 ,  H04B2201/70705

Abstract: Spreading factor (SF) estimation in a code division multiple access (CDMA) spread spectrum system where the SF of the data channel may change on a frame-by-frame basis to reflect a change in the data rate for each corresponding frame. The SF estimation methods despread the data channel for all possible SF values, perform maximal ratio combining (MRC) when resolved multipaths occur, take the absolute value of the MRC results, and average these absolute values over many symbol periods to obtain decision statistics for the various SF's. The SF estimation methods then post-process these decision statistics and make a SF decision.

公开(公告)号：US06882636B1

公开(公告)日：2005-04-19

申请号：US09611069

申请日：2000-07-06

Applicant: Jae-Yoel Kim ,  Hee-Won Kang

Inventor： Jae-Yoel Kim ,  Hee-Won Kang

IPC: H03M13/00 ,  H04B1/707 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04J13/12 ,  H04L1/00 ,  H04L9/06 ,  H04Q7/38 ,  H04B7/216

CPC classification number: H04L1/0072 ,  H03M13/136 ,  H03M13/47 ,  H03M13/618 ,  H04B1/707 ,  H04B2201/70705 ,  H04J13/0048 ,  H04J13/12 ,  H04L1/0025 ,  H04L1/0028 ,  H04L1/0039 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057

Abstract: An apparatus and method for encoding/decoding a transport format combination indicator (TFCI) in a CDMA mobile communication system. In the TFCI encoding apparatus, a one-bit generator generates a sequence having the same symbols. A basis orthogonal sequence generator generates a plurality of basis orthogonal sequences. A basis mask sequence generator generates a plurality of basis mask sequences. An operation unit receives TFCI bits that are divided into a first information part representing biorthogonal sequence conversion, a second information part representing orthogonal sequence conversion, and a third information part representing mask sequence conversion and combines an orthogonal sequence selected from the basis orthogonal sequence based on the second information, a biorthogonal sequence obtained by combining the selected orthogonal sequence with the same symbols selected based on the first information part, and a mask sequence selected based on the biorthogonal sequence and the third information part, thereby generating a TFCI sequence.

Abstract translation: 一种用于在CDMA移动通信系统中对传输格式组合指示符（TFCI）进行编码/解码的装置和方法。 在TFCI编码装置中，1比特发生器产生具有相同符号的序列。 基准正交序列生成器生成多个基本正交序列。 基屏蔽序列发生器产生多个基本掩码序列。 操作单元接收被分成表示双正交序列转换的第一信息部分，表示正交序列转换的第二信息部分和表示掩码序列转换的第三信息部分的TFCI比特，并且将基于正交序列的正交序列基于 第二信息，通过将所选择的正交序列与基于第一信息部分选择的相同符号组合而获得的双正交序列，以及基于双正交序列和第三信息部分选择的掩码序列，从而生成TFCI序列。

公开(公告)号：US06879576B1

公开(公告)日：2005-04-12

申请号：US09655609

申请日：2000-09-06

Applicant: Avneesh Agrawal ,  Daisuke Terasawa

Inventor： Avneesh Agrawal ,  Daisuke Terasawa

IPC: H04J13/20 ,  H04B1/7117 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04Q7/38 ,  H04B7/216

CPC classification number: H04J13/0044 ,  H04B7/2628 ,  H04B2201/70705 ,  H04B2201/709709

Abstract: Techniques for recovering data transmitted on a physical channel in which the channelization code is not known at the time of the data recovery. A modulated signal is received an processed to provide received samples. A hypothesized channelization code (e.g., an OVSF code in the W-CDMA system) is selected and used to process the received samples to generate partially processed symbols. The hypothesized channelization code is a “base” code that can be used to generate all possible channelization codes that may have been used for the physical channel. Intermediate results representative of the partially processed symbols are stored and, upon determination of the actual channelization code, further processed in accordance with the actual and hypothesized channelization codes to provide the final results.

Abstract translation: 用于恢复在数据恢复时信道化码不知道的物理信道上发送的数据的技术。 接收经处理的调制信号以提供接收的采样。 选择假设的信道化码（例如，W-CDMA系统中的OVSF码）并用于处理接收到的采样以产生部分处理的符号。 假设的信道化码是可以用于生成可能已经用于物理信道的所有可能的信道化码的“基”码。 代表部分处理的符号的中间结果被存储，并且在确定实际信道化码后，根据实际和假设的信道化码进一步处理以提供最终结果。

公开(公告)号：US06865217B2

公开(公告)日：2005-03-08

申请号：US10425431

申请日：2003-04-29

Applicant: John D. Kaewell, Jr.

Inventor： John D. Kaewell, Jr.

IPC: H03M13/41 ,  H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H04B1/69 ,  H04L27/06

CPC classification number: H04L1/006 ,  H03M13/256 ,  H03M13/41 ,  H03M13/4107 ,  H03M13/4169 ,  H03M13/6502 ,  H03M13/6505 ,  H04B1/707 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04L1/0009 ,  H04L1/0046 ,  H04L1/0052 ,  H04L1/0054 ,  H04L1/08

Abstract: A method for simultaneously receiving and processing multiple channels of data at independent rates which share a same frequency spectrum begins with receiving a multichannel data communication signal having multiple data channels at independent data rates on the same frequency spectrum. Next, selected channels of data of the received signal are separated and the data rate for each channel is identified. Then each separated channel of the received signal is decoded at an assigned data rate using a common decoding memory. Lastly, each separated channel is directed to a different decoding means and each decoding means is assigned a data rate responsive to the identification of data rates when the channels were separated.

Abstract translation: 同时以独立速率接收和处理共享相同频谱的多信道数据的方法开始于在相同频谱上以独立数据速率接收具有多个数据信道的多信道数据通信信号。 接下来，分离所接收的信号的所选择的数据通道，并且识别每个通道的数据速率。 然后，使用公共解码存储器，以分配的数据速率解码接收信号的每个分离的信道。 最后，每个分离的信道被引导到不同的解码装置，并且当信道被分离时，每个解码装置被分配响应于数据速率的识别的数据速率。

公开(公告)号：US06836504B2

公开(公告)日：2004-12-28

申请号：US09783151

申请日：2001-02-14

Applicant: Lee Proctor ,  William K. Morgan ,  Mark Hetherington ,  Naisum Wong

Inventor： Lee Proctor ,  William K. Morgan ,  Mark Hetherington ,  Naisum Wong

IPC: H04L2730

CPC classification number: H04B1/707 ,  H04B2201/70705

Abstract: A spreader (216) comprises a code generator (301) and exclusive OR circuitry (303). In the preferred embodiment of the present invention the code generator (301) generates a code having a length and value dependent upon the current transmission rate. This code is then exclusive OR'd with the incoming data stream to produce spread data.

Abstract translation: 扩展器（216）包括代码生成器（301）和异或电路（303）。 在本发明的优选实施例中，代码生成器（301）生成具有取决于当前传输速率的长度和值的代码。 然后，该代码与输入数据流进行异或运算以产生扩展数据。

公开(公告)号：US20040202151A1

公开(公告)日：2004-10-14

申请号：US10731456

申请日：2003-12-09

Applicant: InterDigital Technology Corporation

Inventor： Alexander Reznik ,  Ariela Zeira

IPC: H04L012/66

CPC classification number: H04B1/7103 ,  H04B1/71055 ,  H04B2001/71077 ,  H04B2201/70705

Abstract: A first detector receives a received signal and extracts the data signals from the received signal. A hard decision converter converts soft symbols outputted by the first detector into hard symbols. An interference canceller extracts the voice signals from the received signal. A second detector is connected to the output of the interference canceller, and extracts the individual voice signals. The second detector is a different detector type than the first detector.

Abstract translation: 第一检测器接收接收信号并从接收信号中提取数据信号。 硬判决转换器将由第一检测器输出的软符号转换成硬符号。 干扰消除器从接收到的信号中提取语音信号。 第二检测器连接到干扰消除器的输出，并提取各个声音信号。 第二检测器是与第一检测器不同的检测器类型。

公开(公告)号：US06798850B1

公开(公告)日：2004-09-28

申请号：US09512377

申请日：2000-02-25

Applicant: Anders Wedin ,  Richard Hellberg

Inventor： Anders Wedin ,  Richard Hellberg

IPC: H04L2706

CPC classification number: H04B1/0014 ,  H04B1/0003 ,  H04B1/0039 ,  H04B1/28 ,  H04B1/707 ,  H04B1/7115 ,  H04B2201/70705 ,  H04B2201/7071 ,  H04L7/0029 ,  H04W88/10

Abstract: A system, method, and receiver for receiving radio signals modulated according to different radio communication standards. Radio signals are received and downconverted to an intermediate frequency (IF) signal. An A/D-converter samples the IF signal at a sampling rate and digitizes the sampled signal into a digital signal. A channelizer filters out at least two modulated channels from the digital signal. A first ago channel is modulated according to a Time Division Multiple Access (TDMA) standard, and a second channel is modulated according to a Code Division Multiple Access (CDMA) standard. A first demodulating unit demodulates the TDMA channel, and a second demodulating unit demodulates the CDMA channel. Each of the demodulating units detects and, when needed, resamples each of the modulated channels individually, and delivers a corresponding demodulated channel. A Frequency Division Multiple Access (FDMA) channel may also be received and processed.

Abstract translation: 一种用于接收根据不同无线电通信标准调制的无线电信号的系统，方法和接收机。 无线电信号被接收并下变频到中频（IF）信号。 A / D转换器以采样率对IF信号进行采样，并将采样信号数字化为数字信号。 信道化器从数字信号中滤出至少两个调制信道。 根据时分多址（TDMA）标准来调制前一个信道，并且根据码分多址（CDMA）标准调制第二信道。 第一解调单元解调TDMA信道，第二解调单元解调CDMA信道。 每个解调单元检测并且在需要时分别重新对每个调制信道进行采样，并传送相应的解调信道。 也可以接收和处理频分多址（FDMA）信道。