The Coarse-Position-Free Coarse-Time Positioning Method for BDS Receiver

Pseudocode 1

Pseudo code for generating the 3-satellite code phase ambiguity search space.

idp = 1;

for xSol = -PrDiffCs(1)  :  PrDiffCs(1)

if abs(xSol) <= (PrDiffCs(3) - PrDiffCs(2))

for ySol = -PrDiffCs(2)  :  PrDiffCs(2)

PrCodeInt(idp, 2) = PrCodeInt(idp, 1) + xSol;

PrCodeInt(idp, 3) = PrCodeInt(idp, 1) + ySol;

idp = idp + 1;

end

elseif abs(xSol) > (PrDiffCs(3) - PrDiffCs(2))

if xSol > 0

for ySol = -(PrDiffCs(3) - xSol)      :  PrDiffCs(2)

PrCodeInt(idp, 2) = PrCodeInt(idp, 1) + xSol;

PrCodeInt(idp, 3) = PrCodeInt(idp, 1) + ySol;

idp = idp + 1;

end

elseif xSol < 0

for ySol = -PrDiffCs(2)  :  (PrDiffCs(3) + xSol)

PrCodeInt(idp, 2) = PrCodeInt(idp, 1) + xSol;

PrCodeInt(idp, 3) = PrCodeInt(idp, 1) + ySol;

idp = idp + 1;

end

end

end

end