Unambiguous Processing Techniques of Binary Offset Carrier Modulated Signals - Global Navigation Satellite Systems: Signal,Theory and Applications - page 75

its solutions is systematically described. An innovative design methodology for future
unambiguous processing techniques is also proposed. Under the proposed design
framework, the development of SC algorithm becomes the solving of an optimization
problem with a set of inequalities constraints and can be achieved through four steps.
As two practical examples, the design process of an SC unambiguous acquisition algorithm
as well as an SC unambiguous tracking loop is described respectively to demonstrate the
practicality of the proposed framework and to provide reference to further SC algorithm
development. Although the optimization objects are difference in these two algorithms, the
methods of analysis and the design steps under the analytic design framework are unified.
It is proved that both of these two algorithms can completely eliminate the ambiguity
problem in acquisition and tracking. Moreover, these two algorithms have outstanding
compatibility. Both of them are suitable for generic even-order sine-BOC signal.
Future works will focus on the development of new algorithms under the proposed
framework. Considering the complexities, both of the example algorithms in this Charpter
employ only two local signals. In fact, by using more local signals, degrees of freedom in
design can be further increased and the shape control will be more flexible. Besides, this
analytic design framework can be used not only on unambiguous algorithm development
but also on finding good local waveform to resist the effect of multipath.
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