多点定位接收机的设计与实现.pdfVIP

多点定位接收机的设计与实现

摘

要：为解决民用航空多点定位系统中多个远端站的时间同步问题，完成对广播式自动相关

监视系统（automatic

dependent

surveillance-broadcast，ADS-B）信号到达时间信息的提取，设计一款高

精度低成本的多点定位接收机。由于到达时间差（time

difference

of

arrival，TDOA）的精度主要由时

间同步和报头检测的精度决定，提出基于驯服时钟的分布式授时方法和具有动态门限值的报头检测

算法来提高TDOA的精度，从而提高接收机的精度，通过Taylor级数展开法验证，表明接收机的

TDOA精度达到了预期要求，最后完成接收机的硬件和软件实现。

关键词：多点定位；到达时间差；时间同步；广播式自动相关监视系统

Design

and

Implement

of

Multipoint

Positioning

Receiver

Abstract:

In

order

to

solve

the

time

synchronization

problem

of

multiple

remote

stations

in

civil

avi-

ation

multi-point

positioning

systems

and

extract

the

arrival

time

information

of

the

automatic

dependent

surveillance

broadcast

(ADS-B)

signal,

this

paper

designs

a

high-precision

and

low-cost

multi-point

posi-

tioning

receiver.

Due

to

the

fact

that

the

accuracy

of

time

difference

of

arrival

(TDOA)

is

mainly

determ-

ined

by

time

synchronization

and

header

detection

accuracy,

a

high-precision

distributed

timing

method

based

on

tamed

clocks

and

a

header

detection

algorithm

with

dynamic

threshold

values

is

proposed

to

im-

prove

the

accuracy

of

TDOA

and

thus

enhance

the

accuracy

of

the

receiver.

Then,

the

Taylor

series

expan-

sion

method

was

used

to

verify

that

the

TDOA

accuracy

of

the

receiver

met

the

expected

requirements.

Fi-

nally,

the

hardware

and

software

implementation

of

the

receiver

were

completed.

Keywords:

multilateration；TDOA；time

synchronization；ADS-B

收稿日期：2023

−

08

−

01

第

1

期汤新民等:多点定位接收机的设计与实现29

随着机场和航空器数量的增加，机场场面监视时钟的分布式授时方法。针对多个远端站的高精

问题变得越来越突出。目前，我国中小机场普遍缺度时间同步和信号检测的问题，结合现场可编程门

乏有效的监视手段。传统的场面监视雷达价格昂