Improved HLLL Lattice Basis Reduction Algorithm to Solve GNSS Integer Ambiguity

Table 1

Comparison of different algorithm specifications.

Lattice reduction algorithm	Conditional number	Hadamard ratio	Number of basis vector exchanges	Reduction time
LLL algorithm	1.9857	0.95504	44	0.0023
HLLL algorithm	1.8802	0.97532	44	0.0039
PHLLL algorithm	1.6587	0.99083	13	0.0010