公开(公告)号：US08964794B2

公开(公告)日：2015-02-24

申请号：US14166140

申请日：2014-01-28

Applicant: Honeywell International Inc.

Inventor： Jamal Haque ,  Darryl I. Parmet ,  Halil N. Altan ,  Kurt Holmquist

IPC: H04L7/08 ,  H04L7/10 ,  H04J3/06

CPC classification number: H04L7/08 ,  H04J3/0608 ,  H04L7/10

Abstract: A method for maintaining a nominal decoder time phase alignment through a data drop-out period is provided. The method includes determining if a search window is open. A search-window width of the search window is an initial search-window width. The initial search-window width is larger than the width of the frame synchronization pattern. The method also includes determining if a bit clock rising edge is detected and searching for the frame synchronization pattern on a bit level when the search window is open and the bit clock rising edge is detected. If the frame synchronization pattern is not found responsive to the searching, the method also includes determining if a receipt time of the bit received when the bit clock rising edge was detected is coincident with an expected start time of the frame synchronization pattern.

Abstract translation: 提供了一种通过数据丢失时段来维持标称解码器时间相位对准的方法。 该方法包括确定搜索窗口是否打开。 搜索窗口的搜索窗口宽度是初始搜索窗口宽度。 初始搜索窗口宽度大于帧同步模式的宽度。 该方法还包括当搜索窗口打开并且检测到位时钟上升沿时，确定是否检测到位时钟上升沿并在位电平上搜索帧同步模式。 如果响应于搜索而没有找到帧同步模式，则该方法还包括确定当检测到位时钟上升沿时接收到的比特的接收时间是否与帧同步模式的预期开始时间一致。

公开(公告)号：US09755796B2

公开(公告)日：2017-09-05

申请号：US14660998

申请日：2015-03-18

Applicant: Honeywell International Inc.

Inventor： Jamal Haque ,  Michael R. Franceschini

IPC: H04W4/00 ,  H04L5/00 ,  H04J11/00 ,  G01C5/00 ,  H04B7/185 ,  H04L27/00 ,  H04L27/26

CPC classification number: H04L5/0007 ,  G01C5/005 ,  H04B7/18506 ,  H04J11/00 ,  H04J2011/0096 ,  H04L5/0012 ,  H04L5/0062 ,  H04L27/0006 ,  H04L27/2634

Abstract: An avionics system comprises a plurality of avionics components; at least one OFDM transmitter coupled to a respective one or more of the plurality of avionics components and configured to transmit a wireless OFDM signal comprising a plurality of sub-bands; at least one OFDM receiver coupled to a respective one or more of the plurality of avionics components and configured to receive the wireless OFDM signal transmitted by the OFDM transmitter; and a radio altimeter configured to transmit a signal tone that sweeps a frequency spectrum allocated to the radio altimeter at a predefined rate and periodicity. The at least one OFDM transmitter is configured to transmit the wireless OFDM signal in the frequency spectrum allocated to the radio altimeter and to sequentially turn off respective subsets of the plurality of sub-bands in synchronization with the predefined rate and periodicity of the signal tone frequency sweep.

公开(公告)号：US20140153632A1

公开(公告)日：2014-06-05

申请号：US13689874

申请日：2012-11-30

Applicant: HONEYWELL INTERNATIONAL INC.

Inventor： Alfonso Malaga ,  Jamal Haque ,  Andrew White

IPC: H04L25/49

CPC classification number: H04L25/4902 ,  G01S13/782 ,  H04L7/042

Abstract: One embodiment is directed towards an RF receiver for receiving a pulse-position modulated signal transmitted with a 1090 MHz ADS-B transmitter, wherein the pulse-position modulated signal is preceded by a preamble of 4 pulses that conform to an ADS-B protocol. The receiver can filter a digital sample stream with a filter matched to pulses in an earlier half of an expected preamble sequence to produce a first matched filter output sample stream. The receiver can also filter the digital sample stream with a filter matched to a pulses in a latter half of the expected preamble sequence to produce a second matched filter output sample stream. The receiver can determine that a sequence of pulses match the expected preamble sequence based on when the first matched filter output sample stream and the second matched filter output sample stream are above a minimum trigger level at the same time.

Abstract translation: 一个实施例涉及用于接收用1090MHz ADS-B发射机发射的脉冲位置调制信号的RF接收机，其中脉冲位置调制信号前面符合ADS-B协议的4个脉冲的前同步码。 接收机可以使用与预期前同步码序列的前半部分中的脉冲匹配的滤波器对数字样本流进行滤波，以产生第一匹配的滤波器输出样本流。 接收机还可以使用与预期前同步码序列的后半部分中的脉冲匹配的滤波器对数字样本流进行滤波，以产生第二匹配滤波器输出样本流。 基于第一匹配滤波器输出采样流和第二匹配滤波器输出采样流何时同时高于最小触发电平，接收器可以确定脉冲序列与期望的前同步码序列匹配。

公开(公告)号：US20170111771A1

公开(公告)日：2017-04-20

申请号：US14884447

申请日：2015-10-15

Applicant: Honeywell International Inc.

Inventor： Jamal Haque ,  Andy Rowland ,  Matthew Marcus Hilsenrath

IPC: H04W4/04 ,  G01S5/02 ,  H04W4/02

CPC classification number: G01S19/52 ,  G01S5/021 ,  G01S5/0263 ,  H04B7/18506 ,  H04W4/027 ,  H04W56/0035

Abstract: A method of estimating Doppler shift for air to ground communications comprises obtaining an initial position of an aircraft during flight, wherein the aircraft includes an onboard database with stored positions for a plurality of ground station towers; when a subsequent position of the aircraft nears a stored position of a closest ground station tower, requesting a Doppler shift estimation for the closest ground station tower; obtaining a current position of the aircraft when requesting the Doppler shift estimation; defining an aircraft position vector from the initial position to the current position; defining a tower position vector from the initial position to the stored position; subtracting the aircraft position vector from the tower position vector to determine an aircraft to tower position vector; differentiating the aircraft to tower position vector with respect to time to determine a velocity magnitude to the closest ground station tower; and calculating a Doppler shift.

公开(公告)号：US20160277161A1

公开(公告)日：2016-09-22

申请号：US14660998

申请日：2015-03-18

Applicant: Honeywell International Inc.

Inventor： Jamal Haque ,  Michael R. Franceschini

IPC: H04L5/00 ,  H04J11/00

CPC classification number: H04L5/0007 ,  G01C5/005 ,  H04B7/18506 ,  H04J11/00 ,  H04J2011/0096 ,  H04L5/0012 ,  H04L5/0062 ,  H04L27/0006 ,  H04L27/2634

Abstract: An avionics system comprises a plurality of avionics components; at least one OFDM transmitter coupled to a respective one or more of the plurality of avionics components and configured to transmit a wireless OFDM signal comprising a plurality of sub-bands; at least one OFDM receiver coupled to a respective one or more of the plurality of avionics components and configured to receive the wireless OFDM signal transmitted by the OFDM transmitter; and a radio altimeter configured to transmit a signal tone that sweeps a frequency spectrum allocated to the radio altimeter at a predefined rate and periodicity. The at least one OFDM transmitter is configured to transmit the wireless OFDM signal in the frequency spectrum allocated to the radio altimeter and to sequentially turn off respective subsets of the plurality of sub-bands in synchronization with the predefined rate and periodicity of the signal tone frequency sweep.

Abstract translation: 航空电子系统包括多个航空电子元件; 耦合到所述多个航空电子部件中的相应一个或多个的至少一个OFDM发射机，并且被配置为发送包括多个子带的无线OFDM信号; 耦合到所述多个航空电子部件中的相应一个或多个的至少一个OFDM接收器，并且被配置为接收所述OFDM发射机发送的无线OFDM信号; 以及无线电高度计，被配置为以预定的速率和周期来传送分配给无线电高度计的频谱的信号音。 所述至少一个OFDM发送器被配置为以分配给所述无线电高度计的频谱中的无线OFDM信号发送，并且与所述信号音频率的预定速率和周期同步地顺序地关闭所述多个子带的各个子集 扫。

公开(公告)号：US20140269780A1

公开(公告)日：2014-09-18

申请号：US14166140

申请日：2014-01-28

Applicant: Honeywell International Inc.

Inventor： Jamal Haque ,  Darryl I. Parmet ,  Halil N. Altan ,  Kurt Holmquist

IPC: H04L7/08

CPC classification number: H04L7/08 ,  H04J3/0608 ,  H04L7/10

Abstract: A method for maintaining a nominal decoder time phase alignment through a data drop-out period is provided. The method includes determining if a search window is open. A search-window width of the search window is an initial search-window width. The initial search-window width is larger than the width of the frame synchronization pattern. The method also includes determining if a bit clock rising edge is detected and searching for the frame synchronization pattern on a bit level when the search window is open and the bit clock rising edge is detected. If the frame synchronization pattern is not found responsive to the searching, the method also includes determining if a receipt time of the bit received when the bit clock rising edge was detected is coincident with an expected start time of the frame synchronization pattern.

Abstract translation: 提供了一种通过数据丢失时段来维持标称解码器时间相位对准的方法。 该方法包括确定搜索窗口是否打开。 搜索窗口的搜索窗口宽度是初始搜索窗口宽度。 初始搜索窗口宽度大于帧同步模式的宽度。 该方法还包括当搜索窗口打开并且检测到位时钟上升沿时，确定是否检测到位时钟上升沿并在位电平上搜索帧同步模式。 如果响应于搜索而没有找到帧同步模式，则该方法还包括确定当检测到位时钟上升沿时接收到的比特的接收时间是否与帧同步模式的预期开始时间一致。

公开(公告)号：US08767815B2

公开(公告)日：2014-07-01

申请号：US13689874

申请日：2012-11-30

Applicant: Honeywell International Inc.

Inventor： Alfonso Malaga ,  Jamal Haque ,  Andrew White

IPC: H03K9/08

CPC classification number: H04L25/4902 ,  G01S13/782 ,  H04L7/042

Abstract: One embodiment is directed towards an RF receiver for receiving a pulse-position modulated signal transmitted with a 1090 MHz ADS-B transmitter, wherein the pulse-position modulated signal is preceded by a preamble of 4 pulses that conform to an ADS-B protocol. The receiver can filter a digital sample stream with a filter matched to pulses in an earlier half of an expected preamble sequence to produce a first matched filter output sample stream. The receiver can also filter the digital sample stream with a filter matched to a pulses in a latter half of the expected preamble sequence to produce a second matched filter output sample stream. The receiver can determine that a sequence of pulses match the expected preamble sequence based on when the first matched filter output sample stream and the second matched filter output sample stream are above a minimum trigger level at the same time.

Abstract translation: 一个实施例涉及用于接收用1090MHz ADS-B发射机发射的脉冲位置调制信号的RF接收机，其中脉冲位置调制信号前面符合ADS-B协议的4个脉冲的前同步码。 接收机可以使用与预期前同步码序列的前半部分中的脉冲匹配的滤波器对数字样本流进行滤波，以产生第一匹配的滤波器输出样本流。 接收机还可以使用与预期前同步码序列的后半部分中的脉冲匹配的滤波器对数字样本流进行滤波，以产生第二匹配滤波器输出样本流。 基于第一匹配滤波器输出采样流和第二匹配滤波器输出采样流何时同时高于最小触发电平，接收器可以确定脉冲序列与期望的前同步码序列匹配。