Title:
時間基準システム
Document Type and Number:
Japanese Patent JP5646486
Kind Code:
B2
Abstract:
A time reference system for generating a time reference from signals produced by a global navigation satellite constellation has a satellite signal receiver to receive and down-convert code-modulated signals from a plurality of satellites and a correlator to track and decode the down-converted signals to provide signals containing partial pseudo-range measurements for respective satellites. A data processing arrangement receives assistance data from an external source and performs data-bit synchronization in which bit edges of a low frequency data bit stream carried by the received satellite signals are identified, to perform a preliminary position-velocity-time solution to provide an approximate time reference, and to perform auto-correlation of pre-selected data sequences in the data stream to resolve time ambiguities thereby to compute a precise time reference signal in weak received signal conditions. The pre-selected data sequences may be the repeated data preamble in the GPS navigation message constituted by the data stream.
Inventors:
ビッカースタッフ， ジャクリーン， ペタ
アニヤエグブ， エスター， オルル
フレミング， ピーター， マーク
ホイットワース， ジェラルド
アニヤエグブ， エスター， オルル
フレミング， ピーター， マーク
ホイットワース， ジェラルド
Application Number:
JP2011526559A
Publication Date:
December 24, 2014
Filing Date:
September 17, 2009
Export Citation:
Assignee:
インテル コーポレイション
International Classes:
G01S19/14; G01S5/02; G01S19/25; G01S19/35; G01S19/42; G04R20/00; G04R20/04; G04R20/06
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Shinsuke Onuki
Tadahiko Ito
Shinsuke Onuki