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。

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。