公开(公告)号：US08964813B2

公开(公告)日：2015-02-24

申请号：US12376017

申请日：2007-08-10

申请人： Matthew Stephen Hodgart ,  Paul David Blunt

发明人： Matthew Stephen Hodgart ,  Paul David Blunt

IPC分类号： H04B1/00 ,  G01S19/30 ,  G01S19/29

CPC分类号： G01S19/30 ,  G01S19/24 ,  G01S19/29

摘要： Binary Offset Carrier (BOC) is the agreed modulation for signals of next generation Global Navigation satellite systems (GNSS). Compared to current phase shift keying (PSK) modulation by a code, there is a further modulation by a sub-carrier. There is a known major difficulty with BOC called ‘false lock’ where early/late gates settle on the wrong peak of the multi-peaked correlation function. This invention eliminates the problem by eliminating that correlation. Instead, a two dimensional correlation is tracked independently to realize a dual estimate. An unambiguous lower accuracy estimate derived from the code phase is used to make an integer correction to a higher accuracy but ambiguous independent estimate based on the sub-carrier phase. The actual receiver may adopt a triple loop, instead of the usual double loop, where carrier phase, sub-carrier phase and code phase are tracked independently but interactively.

摘要翻译： 二进制偏移载波（BOC）是下一代全球导航卫星系统（GNSS）信号的协商调制。 与通过码的当前相移键控（PSK）调制相比，副载波进一步进行调制。 BOC称之为“假锁”，其中早/晚门定位于多峰相关函数的错误峰值，已知一个主要困难。 本发明通过消除该相关性来消除该问题。 相反，独立地跟踪二维相关以实现双重估计。 使用从码相位导出的明确的较低精度估计来使得基于子载波相位的更高精度但是模糊的独立估计的整数校正。 实际的接收机可以采用三回路，而不是通常的双回路，其中载波相位，子载波相位和码相位被独立地但交互地跟踪。

公开(公告)号：US20100104046A1

公开(公告)日：2010-04-29

申请号：US12376017

申请日：2007-08-10

申请人： Matthew Stephen Hodgart ,  Paul David Blunt

发明人： Matthew Stephen Hodgart ,  Paul David Blunt

IPC分类号： H04L27/06

CPC分类号： G01S19/30 ,  G01S19/24 ,  G01S19/29

摘要： Binary Offset Carrier (BOC) is the agreed modulation for signals of next generation Global Navigation satellite systems (GNSS). Compared to current phase shift keying (PSK) modulation by a code, there is a further modulation by a sub-carrier. There is a known major difficulty with BOC called ‘false lock’ where early/late gates settle on the wrong peak of the multi-peaked correlation function. This invention eliminates the problem by eliminating that correlation. Instead, a two dimensional correlation is tracked independently to realise a dual estimate. An unambiguous lower accuracy estimate derived from the code phase is used to make an integer correction to a higher accuracy but ambiguous independent estimate based on the sub-carrier phase. The actual receiver may adopt a triple loop, instead of the usual double loop, where carrier phase, sub-carrier phase and code phase are tracked independently but interactively.

摘要翻译： 二进制偏移载波（BOC）是下一代全球导航卫星系统（GNSS）信号的协商调制。 与通过码的当前相移键控（PSK）调制相比，副载波进一步进行调制。 BOC称之为“假锁”，其中早/晚门定位于多峰相关函数的错误峰值，已知一个主要困难。 本发明通过消除该相关性来消除该问题。 相反，独立地跟踪二维相关以实现双重估计。 使用从码相位导出的明确的较低精度估计来使得基于子载波相位的更高精度但是模糊的独立估计的整数校正。 实际的接收机可以采用三回路，而不是通常的双回路，其中载波相位，子载波相位和码相位被独立地但交互地跟踪。