公开(公告)号：US20160191287A1

公开(公告)日：2016-06-30

申请号：US14587184

申请日：2014-12-31

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： ALAN P. CONRAD

IPC: H04L27/26 ,  H04L5/00 ,  H04L12/26

CPC classification number: H04L27/2607 ,  H04L27/2663 ,  H04L27/2678

Abstract: Disclosed herein are methods and systems for dynamic single-frequency-network-(SFN)-multicast symbol synchronization. In an embodiment, a wireless-communication device (WCD) receives an SFN-multicast transmission at least in part by receiving a respective SFN-multicast-transmission signal from each site in a plurality of sites in a given SFN-multicast area, where each such received SFN-multicast-transmission signal has a respective SFN-multicast cyclic prefix. The WCD calculates a multisource multipath delay spread (“MMDS”) that is characteristic of the received plurality of SFN-multicast-transmission signals, and determines whether that calculated MMDS exceeds a threshold MMDS. If so, the WCD selects a multicast timing point that is after the SFN-multicast cyclic prefix of a first-received one of the received SFN-multicast-transmission signals. If not, the WCD selects a multicast timing point that is within the SFN-multicast cyclic prefix of the first-received SFN-multicast-transmission signal. The WCD uses the selected multicast timing point to demodulate the received SFN-multicast transmission.

Abstract translation: 这里公开了用于动态单频网（SFN） - 组播符号同步的方法和系统。 在一个实施例中，无线通信设备（WCD）至少部分地通过从给定SFN多播区域中的多个站点中的每个站点接收相应的SFN多播传输信号来接收SFN多播传输，其中每个 这样接收的SFN组播传输信号具有相应的SFN多播循环前缀。 WCD计算作为接收到的多个SFN多播传输信号的特征的多源多径延迟扩展（“MMDS”），并且确定所计算的MMDS是否超过阈值MMDS。 如果是，则WCD选择在所接收的SFN组播传输信号中的第一接收到的SFN组播循环前缀之后的多播定时点。 如果不是，则WCD选择在第一接收的SFN组播传输信号的SFN组播循环前缀内的组播定时点。 WCD使用所选择的多播定时点来解调所接收的SFN多播传输。

公开(公告)号：US20160182200A1

公开(公告)日：2016-06-23

申请号：US14574487

申请日：2014-12-18

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： ALAN P. CONRAD ,  KEVIN G. DOBERSTEIN

IPC: H04L5/00

CPC classification number: H04B1/7097 ,  H04J11/004

Abstract: Disclosed herein are methods and systems for canceling a blocking signal to obtain a desired signal. An example process includes receiving both a blocking signal and a set of blocking bits corresponding to a demodulation of the blocking signal. A remodulated blocking signal is generated by modulating the received set of blocking bits. The remodulated blocking signal is passed through a blocking-band bandpass filter to generate an estimated blocking signal, and is also passed through a desired-band bandpass filter to generate an unconditioned reference signal. One or more signal-parameter differences between the blocking signal and the estimated blocking signal are identified, and one or more signal compensations are accordingly applied to the unconditioned reference signal to generate a conditioned reference signal, which is then output to a blocking-signal-canceling system.

Abstract translation: 这里公开了用于消除阻塞信号以获得期望信号的方法和系统。 示例性处理包括接收阻塞信号和对应于阻塞信号的解调的一组阻塞位。 通过调制所接收的阻塞位组来产生再调制的阻塞信号。 重新调制的阻塞信号通过阻带带通滤波器以产生估计的阻塞信号，并且还通过期望带通带通滤波器以产生无条件参考信号。 识别阻塞信号和估计阻塞信号之间的一个或多个信号参数差异，并且相应地将一个或多个信号补偿应用于未条件参考信号以产生经调节的参考信号，然后输出到阻塞信号 - 取消系统。

公开(公告)号：US20140092883A1

公开(公告)日：2014-04-03

申请号：US13631576

申请日：2012-09-28

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： SANJAY G. DESAI ,  ALAN P. CONRAD ,  ROBERT D. LOGALBO

IPC: H04W72/04

CPC classification number: H04W72/0406 ,  H04B7/2643 ,  H04W72/0446 ,  H04W74/08

Abstract: A method for assigning slot reservations to subscriber radios in a TDMA communications system, where data is arranged into a series of superframes, includes an inbound signaling protocol having a plurality of inbound transmission slots. An outbound signaling protocol includes an inbound reservation scheduling slot, which includes a plurality of subscriber access code fields. Each subscriber access code field corresponds to at least one of the inbound transmission slots. Each subscriber access code field may store a subscriber access code associated with a subscriber radio. The inbound reservation scheduling message includes a subscriber access code in at least one of the subscriber access code fields. As such, the subscriber radio associated with the subscriber access code may transmit data during the inbound transmission slot corresponding to the subscriber access code in which the subscriber access code field is stored.

Abstract translation: 一种在数据被布置成一系列超帧的TDMA通信系统中为用户无线电分配时隙预留的方法包括具有多个入站传输时隙的入站信令协议。 出站信令协议包括入站预留调度时隙，其包括多个用户接入码字段。 每个用户接入码字段对应于入站传输时隙中的至少一个。 每个用户接入码字段可以存储与订户无线电相关联的用户接入码。 入站预约调度消息在至少一个用户接入码字段中包括用户接入码。 这样，与用户接入码相关联的用户无线电可以在对应于其中存储用户接入码字段的用户接入码的入站发送时隙中发送数据。