公开(公告)号：WO1997037471A1

公开(公告)日：1997-10-09

申请号：PCT/US1997000435

申请日：1997-01-15

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  WANG, Michael, Mao ,  LING, Fuyun ,  STEWART, Kenneth, A.

IPC: H04L27/06

CPC classification number: H04L1/208 ,  H04B2201/70705 ,  H04L1/0046 ,  H04L1/0054 ,  H04L1/20 ,  H04L25/0262

Abstract: A receiver (500) utilizes parameters generated by a Viterbi decoder (530) to determine one of a plurality of coding rates in which user information is transmitted. The receiver (500) combines the parameters in a predetermined manner, the result of which is a detection statistic (dij). By utilizing the detection statistic (dij), the coding rate at which user information is transmitted is accurately determined.

Abstract translation: 接收机（500）利用由维特比解码器（530）产生的参数来确定发送用户信息的多个编码速率中的一个。 接收机（500）以预定的方式组合参数，其结果是检测统计量（dij）。 通过利用检测统计量（dij），准确地确定发送用户信息的编码率。

公开(公告)号：WO1998005141A1

公开(公告)日：1998-02-05

申请号：PCT/US1997008568

申请日：1997-05-21

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  SEXTON, Thomas, A. ,  LING, Fuyun ,  STEWART, Kenneth, A.

IPC: H04L07/00

CPC classification number: H04B1/7085 ,  H04L7/0331

Abstract: The method includes acquiring a signal (501); inputting (502), at a first time, a received symbol to a demodulator having a plurality of outputs to produce a set of early outputs; inputting (504), at a second time, the received symbol to the demodulator to produce a set of on-time outputs; inputting (505), at a third time, the received symbol to the demodulator to produce a set of late outputs; and comparing (506) at least one output in the set of early outputs with at least one output in the set of late outputs to produce a timing measure.

Abstract translation: 该方法包括获取信号（501）; 在第一时间将接收到的符号输入（502）到具有多个输出的解调器以产生一组早期输出; 在第二时间将所接收的符号输入（504）到解调器，以产生一组导通时间输出; 在第三时间将接收到的符号输入（505）到解调器以产生一组后期输出; 以及将所述早期输出集合中的至少一个输出与所述一组晚期输出中的至少一个输出进行比较（506）以产生定时测量。

公开(公告)号：WO1995008224A1

公开(公告)日：1995-03-23

申请号：PCT/US1994008472

申请日：1994-07-25

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LING, Fuyun

IPC: H04B07/216

CPC classification number: H04W52/04 ,  H04B17/327

Abstract: A method and apparatus is provided for estimating signal power. This is accomplished by demodulating a received communication signal to derive a stream of samples. These samples may consist of either reference samples (132), data samples (142), or a combination thereof. An estimate of the power (118) of the received communication signal is then generated as a function of the stream of samples (144). The signal power estimate (148) may, for example, be used in a power control algorithm by setting a power control indicator (121), in response to a comparison between the signal power estimate and a predetermined threshold. Subsequently, the power control indicator (171) is transmitted over a communication channel to another communication unit. The communication unit detects a power control indicator (171) within a signal (120) received from over the communication channel and adjusts a particular signal transmission power of a signal transmitter in response to the detected power control indicator (171).

Abstract translation: 提供了一种用于估计信号功率的方法和装置。 这是通过解调所接收的通信信号来导出样本流来实现的。 这些样品可以由参考样品（132），数据样品（142）或其组合组成。 然后，根据样本流（144）生成接收到的通信信号的功率（118）的估计值。 响应于信号功率估计和预定阈值之间的比较，信号功率估计（148）可以例如通过设置功率控制指示符（121）而用于功率控制算法中。 随后，通过通信信道将功率控制指示符（171）发送到另一个通信单元。 通信单元检测在从通信信道接收的信号（120）内的功率控制指示符（171），并响应于检测到的功率控制指示符（171）来调整信号发送器的特定信号发送功率。

公开(公告)号：WO1997025780A1

公开(公告)日：1997-07-17

申请号：PCT/US1996017288

申请日：1996-10-28

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  SEXTON, Thomas, A. ,  LING, Fuyun

IPC: H04B01/10

CPC classification number: H04L7/0062 ,  H04L25/0202 ,  H04L25/0214 ,  H04L25/0236

Abstract: A receiver (200, 400) implements improved channel estimation. The receiver (200, 400) demodulates a transmitted signal, and makes an initial channel estimate (115). The receiver (200, 400) then makes a hard decision (301) as to whether the channel estimate was correct and groups samples representing the decision. A vector sum of the group of samples is computed (302), and each sample is compared to the vector sum (303). The sample having the largest projection on the vector sum is retained (304), and the other samples are considered noise, and are thus discarded (305). After obtaining a predetermined number of retained samples (306), the retained samples are used to generate a new channel estimate (226). Since the noisy estimates are discarded, the new channel estimate (226) contains fewer errors than the initial channel estimate (115). The new channel estimate (226) is used to generate decoded data (250).

Abstract translation: 接收机（200,400）实现改进的信道估计。 接收机（200,400）对发送的信号进行解调，并进行初始信道估计（115）。 然后，接收机（200,400）作出关于信道估计是否正确以及表示该决定的组样本的硬判决（301）。 计算样本组的矢量和（302），并将每个样本与矢量和（303）进行比较。 保留矢量和上具有最大投影的样本（304），其他样本被认为是噪声，因此被丢弃（305）。 在获得预定数量的保留样本（306）之后，使用保留的样本来产生新的信道估计（226）。 由于噪声估计被丢弃，所以新信道估计（226）包含的误差小于初始信道估计（115）。 新信道估计（226）用于生成解码数据（250）。

公开(公告)号：WO1992022155A1

公开(公告)日：1992-12-10

申请号：PCT/US1992003552

申请日：1992-04-29

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LING, Fuyun ,  LABEDZ, Gerald, P.

IPC: H04J03/06

CPC classification number: H04L27/2332 ,  H04L25/0212 ,  H04L2027/003 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0095

Abstract: The present invention relates to a method and apparatus for providing carrier frequency offset compensation in a time division multiple access (TDMA) communication system (100). In this effort a TDMA receiver (105, 107, 109, 111) is adapted to receive, via a transmission channel, a transmitted signal burst which includes a synchonization signal pattern, a message signal portion and at least one known portion, in a TDMA time slot. Initially, a phase error at that portion of the received signal which corresponds to the known portion of the transmitted signal is determined. Thereafter, various received signal parameters are adjusted in order to eliminate the phase error and thereby compensate for any carrier frequency offsets.

公开(公告)号：WO1992016054A1

公开(公告)日：1992-09-17

申请号：PCT/US1992001162

申请日：1992-02-12

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  BORTH, David, E. ,  RASKY, Phillip, D. ,  LING, Fuyun ,  EYUBOGLU, M., Vedat

IPC: H03M13/12

CPC classification number: H03M13/00 ,  H04B7/005

Abstract: A signal weighting system for associating a confidence level with portions of a communication signal transmitted upon a multipath channel (44) and received by a receiver (76). A signal received by the receiver is equalized by an equalizer circuit (60), such as a maximum likelihood sequence estimator (116), and the equalized signal generated thereby is supplied to an adaptive filter (92) which synthesizes portions of the multipath channel. The signal received by the receiver is altered responsive to values of a filtered, equalized signal generated by the adaptive filter.

公开(公告)号：WO1998018202A1

公开(公告)日：1998-04-30

申请号：PCT/US1997014393

申请日：1997-08-13

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  BROWN, Tyler, A. ,  THOMPSON, Dennis, J. ,  LING, Fuyun

IPC: H03D03/00

CPC classification number: H04L1/0059 ,  H04B1/707 ,  H04L27/227 ,  H04L27/233

Abstract: A receiver includes both a coherent and noncoherent demodulator (222). When the confidence that estimates of the channel is high, the coherent demodulator (408, 409, 425, 412) is implemented (400, 418). When the confidence that estimates of the channel is low, the noncoherent demodulator (422, 421) is implemented. A controlling microprocessor controls the selection process and also provides a signal to enable the noncoherent demodulator in instances when noncoherent demodulation would most likely be better than coherent demodulation. As an example, such an instance would be immediately after handoff of a mobile station from a source base-station to a target base-station.

Abstract translation: 接收机包括相干和非相干解调器（222）。 当信道估计值高的置信度时，相干解调器（408,409,425,412）被实现（400,418）。 当信道估计的置信度低时，实现非相干解调器（422,421）。 在非相干解调最有可能优于相干解调的情况下，控制微处理器控制选择过程并且还提供信号以使非相干解调器能够实现。 作为示例，这样的实例将在移动站从源基站切换到目标基站之后立即进行。

公开(公告)号：WO1998000982A2

公开(公告)日：1998-01-08

申请号：PCT/US1997005340

申请日：1997-03-27

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  TONG, Leon ,  LING, Fuyun

IPC: H04Q00/00

CPC classification number: H04W64/00 ,  G01S5/14

Abstract: The method includes receiving (404) by a first base station (212) a signal (215) transmitted from the mobile station (216); demodulating (406) the signal by the first base station (212) to form a demodulated signal; remodulating (408) at least a portion of the demodulated signal to form a reference signal; receiving (412) by the first base station (212) and a second base station (210, 214) a retransmitted signal (217); comparing (414, 416), by the first base station (212), the retransmitted signal (217) with the reference signal to determine a first delay; comparing (414, 416), by the second base station (210, 214), the retransmitted second signal (217) with the reference signal to determine a second delay; and based on the first and second delays, determining (420) a location of the mobile station (216).

Abstract translation: 该方法包括由第一基站（212）接收（404）从移动站（216）发送的信号（215）。 由第一基站（212）解调（406）信号以形成解调信号; 重新调制（408）所述解调信号的至少一部分以形成参考信号; 由第一基站（212）和第二基站（210,214）接收（412）重发信号（217）; 通过所述第一基站（212）将所述重发信号（217）与所述参考信号进行比较（414,416）以确定第一延迟; 通过所述第二基站（210,214）将重发的第二信号（217）与参考信号进行比较（414,416）以确定第二延迟; 并且基于第一和第二延迟，确定（420）移动台（216）的位置。

公开(公告)号：WO1997025774A1

公开(公告)日：1997-07-17

申请号：PCT/US1996017285

申请日：1996-10-28

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LING, Fuyun ,  SCHAFFNER, Terry, Michael

IPC: H03D01/00

CPC classification number: H04L25/0236 ,  H04L25/0214

Abstract: A receiver in a communication system implements coherent channel estimation (200) by first receiving an encoded signal (134) and then generating a complex channel estimate (212, 214) from the encoded signal (134). The receiver then combines the complex channel estimate (212, 214) with the encoded signal (218, 220) to produce a coherent demodulated signal (230, 232). After combining, the receiver decodes a version of the coherent demodulated signal to produce an estimate of the encoded signal (178) prior to encoding.

Abstract translation: 通信系统中的接收机通过首先接收编码信号（134）并随后从编码信号（134）生成复杂信道估计（212,214）来实现相干信道估计（200）。 然后，接收机将复杂信道估计（212,214）与编码信号（218,220）组合以产生相干解调信号（230,232）。 在组合之后，接收机对相干解调信号的版本进行解码，以在编码之前产生编码信号（178）的估计。

公开(公告)号：WO1997050191A1

公开(公告)日：1997-12-31

申请号：PCT/US1997003405

申请日：1997-03-10

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  WANG, Michael, M. ,  LING, Fuyun ,  SCHAFFNER, Terry, M.

IPC: H04B03/46

CPC classification number: H04L1/0054 ,  H03M13/3961 ,  H03M13/41 ,  H04B2201/70705 ,  H04L1/0046

Abstract: A method of determining a rate associated with a received signal including the steps of detecting the received signal (40); decoding (42) the received signal at a first rate, determining a first path metric associated with the first rate (44), decoding (42) the received signal at a second rate, and determining a second path metric associated with the second rate (44); calculating a plurality of discriminant functions based on the first and second path metrics (46); comparing at least one of the plurality of discriminant functions to a predetermined value (48); and selecting one of the first and second rates as a determined rate based on the comparison (62, 66, 72, and 78).

Abstract translation: 一种确定与接收信号相关联的速率的方法，包括检测接收信号的步骤; 以第一速率对接收到的信号进行解码（42），确定与第一速率（44）相关联的第一路径度量，以第二速率解码（42）接收到的信号，以及确定与第二速率相关联的第二路径量度（ 44）; 基于所述第一和第二路径量度（46）计算多个判别函数; 将所述多个判别函数中的至少一个与预定值（48）进行比较; 并且基于所述比较（62,66,72和78）选择所述第一和第二速率中的一个作为确定的速率。