公开(公告)号：US11456760B1

公开(公告)日：2022-09-27

申请号：US17193939

申请日：2021-03-05

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Rodney W. Hagen ,  Gregory J. Buchwald ,  Dennis M. Drees ,  In S. Kim ,  Arthur Christopher Leyh

IPC: H04B1/04 ,  H04B17/318 ,  H04B1/10

Abstract: Apparatus and method for linearizing narrowband carriers with low resolution predistorters are provided. The method includes amplifying, using a power amplifier, one or more broadcast carriers and linearizing, using a predistorter coupled to the power amplifier, the one or more broadcast carriers. The method also includes determining, using an electronic processor, a composite bandwidth of the one or more broadcast carriers and determining, using the electronic processor, whether the composite bandwidth is below a modulation bandwidth of the predistorter. The method further includes controlling, using the electronic processor, a pacification carrier generator coupled to the electronic processor to combine a pacification carrier with the one or more broadcast carriers when the composite bandwidth is below the minimum modulation bandwidth of the predistorter.

公开(公告)号：US20210119839A1

公开(公告)日：2021-04-22

申请号：US16657614

申请日：2019-10-18

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Gregory J. Buchwald ,  Apolinar Chaidez ,  Rodney W. Hagen ,  Arthur Christopher Leyh

IPC: H04L27/00 ,  H04L27/20

Abstract: A base station device and a method for multi-carrier crest factor reduction are provided. The method includes generating, using a plurality of radio frequency sources, a plurality of radio frequency carrier signals. The method also includes initiating modulation, using a plurality of carrier modulators, of a first subset of the plurality of radio frequency carrier signals with information signals at a first time to generate a plurality of modulated signals and initiating modulation, using the plurality of carrier modulators, of a second subset of the plurality of radio frequency carrier signals with the information signals at a second time to generate the plurality of modulated signals. The second time is a predetermined time offset after the first time. The method also includes transmitting, using one or more antennae, a multi-carrier signal including the plurality of modulated signals.

公开(公告)号：US10382905B1

公开(公告)日：2019-08-13

申请号：US16227625

申请日：2018-12-20

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Gregory J. Buchwald ,  Thomas B. Bohn ,  Arthur Christopher Leyh ,  David P Gurney

IPC: H04W4/10 ,  H04W4/021 ,  H04W4/08 ,  H04W84/04

Abstract: A method and server provide for routing traffic to user equipment in a talkgroup. The server receives a request for a new talkgroup call for a talkgroup. The server determines a total number of device targets for the talkgroup call. When the total number of device targets for the new talkgroup call is greater than a predetermined total target threshold number, a call grant for the new talkgroup call is routed to each device target for the talkgroup via a Land Mobile Radio (LMR) network. When the total number of device targets for the new talkgroup call is less than the predetermined total target threshold number, the call grant for the new talkgroup call is routed to each device target for the talkgroup via a preferred network for each device target.

公开(公告)号：US10129820B1

公开(公告)日：2018-11-13

申请号：US15851499

申请日：2017-12-21

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Arthur Christopher Leyh ,  Gregory J. Buchwald ,  Bruce D. Mueller

IPC: H04W48/16 ,  H04B17/21 ,  H04B17/12

Abstract: A device and method for radio-frequency site evaluation is provided. The radio-frequency site comprises one or more radio transmitters in communication with one or more transmit antennas, a monitoring radio receiver in communication with a receive antenna through a variable attenuator, and a controller in communication with the one or more radio transmitters, the monitoring radio receiver and the variable attenuator. The controller identifies the one or more radio transmitters which are currently transmitting, and responsively controls the variable attenuator to an attenuation value where a dynamic range of the monitoring radio receiver has a linear response for total power received at the receive antenna, the attenuation value associated with the one or more radio transmitters that are currently transmitting. Thereafter, the controller controls the monitoring radio receiver to scan at least currently active frequencies of the one or more radio transmitters, for example to detect problems at the site.

公开(公告)号：US10014892B1

公开(公告)日：2018-07-03

申请号：US15645393

申请日：2017-07-10

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Arthur Christopher Leyh ,  Sanjaykumar S. Karpoor ,  David P. Gurney ,  Gregory J. Buchwald

IPC: H04B1/10 ,  H04B17/345 ,  H04B1/38

CPC classification number: H04B1/1027 ,  H04B1/1036 ,  H04B1/38 ,  H04B17/345

Abstract: A communication system (200) is formed of a base station comprising a main base station receiver with a main base station antenna (202) and a secondary receiver with a secondary antenna (212). The secondary receiver detects interference to the main base station antenna (202) causing reduced communications range for communicating with subscriber units (204). The secondary receiver rotates a receiver null (228) of the secondary antenna (212) to reduce the interference in response thereto. The communication system (200) performs a voting decision that selects between the secondary receiver with rotated receiver null and the main base station receiver (104) with reduced communications range, to mitigate the interference to main base station antenna (102).

公开(公告)号：US09088996B2

公开(公告)日：2015-07-21

申请号：US14081497

申请日：2013-11-15

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Gregory J. Buchwald ,  David P. Gurney ,  Arthur Christopher Leyh

IPC: H04W4/00 ,  H04W72/08 ,  H04W84/08

CPC classification number: H04W72/085 ,  H04B17/318 ,  H04B17/391 ,  H04W52/245 ,  H04W52/283 ,  H04W52/343 ,  H04W72/048 ,  H04W72/08 ,  H04W84/08

Abstract: Spectral efficiency is improved by assigning uplink channels according to expected receive signal levels at a serving base station. A first subscriber device detects a new call request indication, and then determines, as a function of its transmit power level and current location relative to the serving base station, an expected receive signal strength indication (RSSI) at its serving base station. Depending on whether it is determined that the expected RSSI is greater than or less than a RSSI threshold: one of (i) transmitting a call request to the serving base station requesting an assignment to a respective designated high-power or low-power channel for the new call and (ii) transmitting the new call on a respective pre-allocated high-power or low-power channel.

Abstract translation: 通过根据服务基站的预期接收信号电平分配上行链路信道来提高频谱效率。 第一用户设备检测新的呼叫请求指示，然后根据其发射功率电平和相对于服务基站的当前位置确定在其服务基站处的预期接收信号强度指示（RSSI）。 取决于确定预期RSSI是否大于或小于RSSI阈值：（i）向服务基站发送请求分配给相应指定的大功率或低功率信道的呼叫请求之一 新呼叫和（ii）在各自预分配的大功率或低功率信道上发送新呼叫。