<p>A method is described, for use with an SPS mobile terminal receiver 102, of providing a compact assistance vector to initialise and constrain the computation of the terminal's location within a region of validity. The compact assistance vector is provided to a computing node 108 able also to obtain measurements from a mobile terminal satellite positioning system receiver within said region. For a known reference point 104 within the region, the range or ranges from the reference point to one or more satellites 101 of the satellite positioning system are obtained. The range or ranges are represented by a number or numbers of ranging code repeat intervals in a limited resolution format. The compact assistance vector is created from the representation or representations of ranging code repeat intervals and transferred to the computing node 108. The compact assistance vector can then be used to initialise a location computation for the SPS mobile terminal receiver 102.</p>
申请公布号
WO2007028759(A1)
申请公布日期
2007.03.15
申请号
WO2006EP65870
申请日期
2006.08.31
申请人
CAMBRIDGE POSITIONING SYSTEMS LIMITED;DUFFETT-SMITH, PETER, JAMES;PRATT, ANTHONY, RICHARD
发明人
DUFFETT-SMITH, PETER, JAMES;PRATT, ANTHONY, RICHARD