公开(公告)号：US06819660B2

公开(公告)日：2004-11-16

申请号：US09798370

申请日：2001-03-02

Applicant: Arjun Khare ,  Tynghuei Lou

Inventor： Arjun Khare ,  Tynghuei Lou

IPC: H04B7216

CPC classification number: H04W28/22 ,  H04B7/264 ,  H04B2201/70705 ,  H04W8/18 ,  H04W24/00

Abstract: In one disclosed embodiment, a mobile unit receives an assigned reverse supplemental channel data rate, for example, as part of a supplemental channel assignment from a base station to the mobile unit in a cdma spread spectrum communication system. The mobile unit utilizes a profiling table to determine a maximum feasible reverse supplemental channel data rate corresponding to a given forward supplemental channel data rate. For example, the profiling table can be constructed by testing the mobile unit to determine what combinations of forward and reverse supplemental channel data rates and operating conditions cause the mobile unit's processor to “crash”. The mobile unit communicates data over the reverse supplemental channel at a data rate which does not exceed the maximum feasible reverse supplemental channel data rate, for example, by constructing service data units using filler to lower the communication data rate below the maximum feasible reverse supplemental channel data rate.

Abstract translation: 在一个公开的实施例中，移动单元例如作为在cdma扩频通信系统中从基站到移动单元的补充信道分配的一部分来接收所分配的反向补充信道数据速率。 移动单元利用分析表来确定对应于给定的前向补充信道数据速率的最大可行反向补充信道数据速率。 例如，可以通过测试移动单元来确定正向和反向补充信道数据速率和操作条件的组合导致移动单元的处理器“崩溃”来构建分析表。 移动单元通过反向补充信道以不超过最大可行反向补充信道数据速率的数据速率传送数据，例如通过使用填充来构建服务数据单元，以将通信数据速率降低到最大可行反向补充信道以下 数据速率。

公开(公告)号：US20040202233A1

公开(公告)日：2004-10-14

申请号：US10834321

申请日：2004-04-28

Applicant: InterDigital Technology Corporation

Inventor： Younglok Kim ,  Jung-Lin Pan ,  Ariela Zeira ,  Alexander Reznik

IPC: H04B001/707

CPC classification number: H04J13/0044 ,  H04B1/707 ,  H04B1/71052 ,  H04B1/71055 ,  H04B2201/70703 ,  H04B2201/70705

Abstract: A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.

Abstract translation: 接收多个通信信号。 每个通信信号具有相关代码。 至少两个通信信号具有不同的扩展因子。 相关代码具有扰码周期。 总系统响应矩阵具有块。 每个块具有长度M的一维和基于部分M的长度的另一维度和每个通信的扩展因子。 M基于扰码周期。 使用所构建的系统响应矩阵来接收所接收的多个通信信号的数据。

公开(公告)号：US06785298B1

公开(公告)日：2004-08-31

申请号：US09501187

申请日：2000-02-10

Applicant: Sung-Soo Hwang

Inventor： Sung-Soo Hwang

IPC: H04J1300

CPC classification number: H04B1/707 ,  H04B2201/70705

Abstract: A method of detecting a transmission rate in a wireless communication terminal employing a Code Division Multiple Access (CDMA) scheme, comprising the steps of: decoding and encoding, at a selected transmission rate, a frame signal corresponding to a data frame currently received by a de-interleaver from a modulator-demodulator (modem) in response to the reception of the data frame; comparing the encoded frame signal with the current frame signal being received from the modulator-demodulator, and as a comparison result, determining whether there are errors in an amount less than a predetermined threshold value; transmitting a signal indicative of the selected transmission rate to a vocoder if there are errors in an amount less than the predetermined threshold value, and determining whether the reception of all data frames is complete; returning to the encoding and decoding step if the reception of all data frames is not complete; and, selecting another transmission rates other than the previously selected transmission rate used to decode and encode the current frame signal if there are errors in an amount greater than the predetermined threshold value, then returning to the encoding and decoding step.

Abstract translation: 一种在采用码分多址（CDMA）方式的无线通信终端中检测传输速率的方法，包括以下步骤：以选定的传输速率解码和编码对应于当前接收的数据帧的帧信号 响应于数据帧的接收，来自调制器解调器（调制解调器）的解交织器; 将编码的帧信号与从调制解调器接收的当前帧信号进行比较，作为比较结果，确定是否存在小于预定阈值的误差; 如果存在小于所述预定阈值的量的误差，则确定所述数据帧的接收是否完整;将所述选择的传输速率的信号发送到声码器; 如果所有数据帧的接收未完成，则返回到编码和解码步骤; 并且如果存在大于预定阈值的量的误差，则选择除了用于对当前帧信号进行解码和编码的先前选择的传输速率之外的其它传输速率，然后返回到编码和解码步骤。

公开(公告)号：US20030053413A1

公开(公告)日：2003-03-20

申请号：US10231284

申请日：2002-08-30

Applicant: NTT DoCoMo, Inc.

Inventor： Mamoru Sawahashi ,  Hiroyuki Atarashi ,  Sadayuki Abeta ,  Noriyuki Maeda

IPC: H04J011/00

CPC classification number: H04B1/692 ,  H04B2201/70705 ,  H04J11/005 ,  H04L1/0003 ,  H04L5/0021 ,  H04L25/0216 ,  H04L25/0228 ,  H04L27/2647

Abstract: A radio transmission system is configured to, on the occasion of radio transmission of information between a transmitter and a receiver, perform the radio transmission of information using an orthogonal frequency and code division multiplexing transmission scheme of parallelly transmitting identical information by a plurality of sub-carriers. The radio transmission system has a spreading factor variable control transmitting device for parallelly converting information channel-coded at the transmitter, according to symbols transmitted simultaneously, and for spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence of a designated spreading factor.

Abstract translation: 无线传输系统被配置为在发射机和接收机之间的无线电传输的情况下，使用通过多个​​子载波并行发送相同信息的正交频率和码分复用传输方案来执行信息的无线电传输， 承运人 无线传输系统具有扩频因子可变控制发送装置，用于根据同时传输的符号并行转换在发射机处频道编码的信息，并且用于在频率方向和时间方向中的至少一个上扩展并行符号序列， 指定扩展因子的扩展码序列。

公开(公告)号：US20020110183A1

公开(公告)日：2002-08-15

申请号：US10083906

申请日：2002-02-27

Applicant: InterDigital Technology Corporation

Inventor： John D. Kaewell JR.

IPC: H04B001/707

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 spread spectrum mobile station receives a multichannel data communication signal. The multichannel data communication signal has multiple data channels at independent data rates on a same frequency spectrum. Selected channels of data of the received signal are separated and the data rate for each channel identified. Each separated channel is decoded at an assigned data rate. A common decoding memory is shared.

Abstract translation: 扩频移动站接收多信道数据通信信号。 多通道数据通信信号在相同频谱上具有独立数据速率的多个数据通道。 接收信号的所选择的数据通道被分离，并且识别每个通道的数据速率。 每个分离的信道以分配的数据速率被解码。 共享解码存储器。

公开(公告)号：US06404828B2

公开(公告)日：2002-06-11

申请号：US09840775

申请日：2001-04-24

Applicant: John D. Kaewell, Jr.

Inventor： John D. Kaewell, Jr.

IPC: H04L2706

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 decoder decodes a plurality of received convolutionally encoded date signals simultaneously. At least two of the encoded data signals have a different data rate. The decoder receives undecoded I and Q symbols from the plurality of encoded data signals and outputs Euclidian distances corresponding to each encoded signal. Each data signal's distances are mapped on to a trellis. To output decoded symbols of each data signal, decisions are traced back in each data signal's trellis.

Abstract translation: 解码器同时解码多个接收的卷积编码的日期信号。 至少两个编码数据信号具有不同的数据速率。 解码器从多个编码数据信号中接收未解码的I和Q符号，并输出对应于每个编码信号的欧几里德距离。 每个数据信号的距离映射到网格。 为了输出每个数据信号的解码符号，在每个数据信号的网格中追溯决策。

公开(公告)号：US6141353A

公开(公告)日：2000-10-31

申请号：US813537

申请日：1997-03-07

Applicant: Kaiping Li

Inventor： Kaiping Li

IPC: H04B1/707 ,  H04L1/00 ,  H04T3/22

CPC classification number: H04L1/20 ,  H04B1/707 ,  H04L1/0006 ,  H04L1/0025 ,  H04L1/0046 ,  H04L1/008 ,  H04L1/201 ,  H04B2201/70705

Abstract: In a synchronous fixed frame boundary system with variable data rates, a transmitter inserts into a current frame an indication of the data rate of the next frame. After the first frame is received and processed at a receiver, the variable data rates of subsequent frames are known before processing, thereby reducing processing load. Furthermore, because the rate indication is inserted into the frame to be error protected along with the rest of the frame information, reliability is high, while additional data overhead and complexity are very low. For example, North American code division multiple access (CDMA) digital cellular telephone systems and personal communication system (PCS) utilize variable data rate transmissions. As a station modem (SM) assembles a current frame for convolutional encoding and further processing, the SM inserts a rate indication for the subsequent frame in accordance with information from a vocoder and CPU of the appropriate data rate for the subsequent frame. On the receiving end, rather than needing to decode multiple times to determine the appropriate data rate for every frame, the receiving SM discovers the rate of each frame by analyzing the information contained in the immediately preceding frame. The rate determination process also includes a verification method to ensure accurate data rate determination.

Abstract translation: 在具有可变数据速率的同步固定帧边界系统中，发射机将当前帧插入到下一帧的数据速率的指示。 在接收机接收和处理第一帧之后，后续帧的可变数据速率在处理之前是已知的，从而减少处理负载。 此外，由于速率指示与帧信息的其余部分一起插入到帧中以被错误保护，所以可靠性高，而附加的数据开销和复杂度非常低。 例如，北美码分多址（CDMA）数字蜂窝电话系统和个人通信系统（PCS）利用可变数据速率传输。 由于站调制解调器（SM）组合用于卷积编码和进一步处理的当前帧，所以SM根据来自声码器和CPU的来自后续帧的适当数据速率的信息插入后续帧的速率指示。 在接收端，接收SM而不是需要多次解码以确定每帧的适当数据速率，接收SM通过分析前一帧中包含的信息来发现每帧的速率。 速率确定过程还包括确保准确的数据速率确定的验证方法。

公开(公告)号：US5896374A

公开(公告)日：1999-04-20

申请号：US732413

申请日：1996-10-22

Applicant: Yukihiko Okumura ,  Fumiyuki Adachi ,  Koji Ohno ,  Akihiro Higashi

Inventor： Yukihiko Okumura ,  Fumiyuki Adachi ,  Koji Ohno ,  Akihiro Higashi

IPC: H04B1/707 ,  H04B7/26 ,  H04J3/14 ,  H04J3/16 ,  H04J13/00 ,  H04L1/00 ,  H04L1/08 ,  H04L7/04 ,  H04B7/216 ,  H04J13/02

CPC classification number: H04L1/0046 ,  H04B1/707 ,  H04B7/2628 ,  H04J3/14 ,  H04J3/1682 ,  H04L1/0002 ,  H04L1/0007 ,  H04L1/0013 ,  H04L1/0038 ,  H04L1/0039 ,  H04L1/0061 ,  H04L1/0063 ,  H04L1/0071 ,  H04L1/0079 ,  H04L1/0086 ,  H04L1/08 ,  H04L7/048 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0032 ,  H04L1/0059 ,  H04L2001/0098 ,  Y02B60/31

Abstract: A variable rate transmission method that can vary the transmission rate of data. A transmitting side supplies a transmitted data sequence to an error detecting encoder 105 and a frame memory 103. The frame memory 103 stores data of a variable length to be transmitted in one frame. The error detecting encoder 105 calculates an error detecting code (such as CRC code) for each frame of the transmitted data. A multiplexer 104 adds the calculated error detecting code ahead of the transmitted data to place it at the initial position of the frame, and sequentially outputs the data sequence frame by frame. A receiving side calculates an error detecting code of the data in each transmitted frame in the same manner as the transmitting side, and compares the calculated error detecting code with the error detecting code at the initial position of the frame. The end bit of the frame data is decided as a position at which the two error detecting codes coincide. This makes it possible to transmit variable length data without informing the receiving side of the data length in each frame. This is equivalent that the transmission rate can be varied freely.

Abstract translation: PCT No.PCT / JP96 / 00419 Sec。 371日期1996年10月22日第 102（e）日期1996年10月22日PCT提交1996年2月23日PCT公布。 公开号WO96 / 26582 日期1996年8月29日可变速率传输方法可以改变数据传输速率。 发送侧将发送的数据序列提供给错误检测编码器105和帧存储器103.帧存储器103将要发送的可变长度的数据存储在一帧中。 错误检测编码器105针对发送数据的每一帧计算错误检测码（例如CRC码）。 复用器104将所发送的数据之前的计算出的错误检测码相加，将其置于帧的初始位置，并逐帧地依次输出数据序列。 接收侧以与发送侧相同的方式计算每个发送帧中的数据的错误检测码，并将计算出的错误检测码与帧的初始位置处的错误检测码进行比较。 帧数据的结束位被确定为两个错误检测码一致的位置。 这使得可以在不向每个帧中的接收方通知数据长度的情况下发送可变长度数据。 这相当于传输速率可以自由变化。

公开(公告)号：US5790592A

公开(公告)日：1998-08-04

申请号：US672549

申请日：1996-06-28

Applicant: June-Yeob Baik

Inventor： June-Yeob Baik

IPC: H04B1/707 ,  H04B1/38

CPC classification number: H04B1/70718 ,  H04B2201/70705

Abstract: A terminal and a method therefor in which only one digital signal processor DSP is utilized, thereby decoding receive data and encoding transmit data in a code division multiple access cellular communication system. The terminal according to the present invention comprises: a DSP for executing a program which includes a sub-routine for determining receive data bit rate, and encoding data to be transmitted according to a transmit data rate; a controller for controlling encoding and decoding operations of the DSP; a modulator for modulating data encoded by the DSP; a demodulator for demodulating receive data, thereby to input the demodulated data to the DSP; a speech encoder for encoding speech information to be transmitted, thereby to input the encoded speech information to the controller; and a speech decoder for restoring data decoded by the DSP.

Abstract translation: 一种终端及其方法，其中仅使用一个数字信号处理器DSP，从而在码分多址蜂窝通信系统中解码接收数据和对发送数据进行编码。 根据本发明的终端包括：用于执行程序的DSP，其包括用于确定接收数据比特率的子程序，以及根据发送数据速率对要发送的数据进行编码; 用于控制DSP的编码和解码操作的控制器; 用于调制由DSP编码的数据的调制器; 解调器，用于解调接收数据，从而将解调的数据输入到DSP; 用于编码要发送的语音信息的语音编码器，从而将编码的语音信息输入到控制器; 以及用于恢复由DSP解码的数据的语音解码器。

公开(公告)号：US5673266A

公开(公告)日：1997-09-30

申请号：US465881

申请日：1995-06-06

Applicant: Kaiping Li

Inventor： Kaiping Li

IPC: H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H04T3/22

CPC classification number: H04L1/0028 ,  H04B1/707 ,  H04L1/0014 ,  H04L1/0039 ,  H04L1/08 ,  H04B2201/70705 ,  H04L1/0025 ,  H04L1/0046

Abstract: In a synchronous fixed frame boundary system with variable data rates, a transmitter inserts into a current frame an indication of the data rate of the next frame. After the first frame is received and processed at a receiver, the data rates of subsequent frames are known before processing, thereby reducing processing load. Furthermore, because the rate indication is inserted into the frame to be error protected along with the rest of the frame information, reliability is high, while additional data overhead and complexity are very low. As an example, North American code division multiple access digital cellular telephone systems utilize variable data rate transmissions. As a station modem (SM) assembles a current frame for convolutional encoding and further processing, the SM inserts a rate indication for the subsequent frame in accordance with information from a vocoder and CPU of the appropriate data rate for the subsequent frame. On the receiving end, rather than needing to decode multiple times to determine the appropriate data rate for every frame, the receiving SM discovers the rate of each frame subsequent to the first frame by analyzing the information contained in the immediately preceding frame. The rate determination process also includes a verification method based upon a frame quality indicator analysis and a symbol error rate analysis to ensure accurate data rate determination.

Abstract translation: 在具有可变数据速率的同步固定帧边界系统中，发射机将当前帧插入到下一帧的数据速率的指示。 在接收器接收和处理第一帧之后，在处理之前已知后续帧的数据速率，从而减少处理负载。 此外，由于速率指示与帧信息的其余部分一起插入到帧中以被错误保护，所以可靠性高，而附加的数据开销和复杂度非常低。 例如，北美码分多址数字蜂窝电话系统利用可变数据速率传输。 由于站调制解调器（SM）组合用于卷积编码和进一步处理的当前帧，所以SM根据来自声码器和CPU的来自后续帧的适当数据速率的信息插入后续帧的速率指示。 在接收端，不需要多次解码以确定每帧的适当数据速率，接收SM通过分析紧接在前的帧中包含的信息来发现第一帧之后的每帧的速率。 速率确定过程还包括基于帧质量指示符分析和符号错误率分析的确认方法，以确保准确的数据速率确定。