Multisystem compatible receiver frequency point selecting method

A receiver, multi-system technology, applied in the field of satellite navigation and communication, can solve complex problems, can not guarantee the quality of the solution, can not guarantee the optimal result of the problem, does not apply to the amount of calculation and other problems, achieve good global search performance, easy to parallelize , the effect of high computational efficiency

Active Publication Date: 2010-07-14
BEIHANG UNIV
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Problems solved by technology

The random method is to randomly select a certain number of points in the problem space and then choose the best from them. It has a certain degree of blindness. For complex problems, the quality of the solution cannot be guaranteed, and the optimal result of the problem cannot

Method used

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  • Multisystem compatible receiver frequency point selecting method
  • Multisystem compatible receiver frequency point selecting method
  • Multisystem compatible receiver frequency point selecting method

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Embodiment

[0058] Multi-system compatible receivers refer to receivers compatible with dual systems and more than two satellite navigation systems. Determining the objective function of the frequency point selection problem of a multi-system compatible receiver needs to consider various constraints, and it can only be achieved after a large number of simulation experiments. get. Taking a dual-system compatible receiver with a two-stage down-conversion structure as an example, the topological structure diagram of the receiver is shown in figure 2 Shown: the first signal L input to the high frequency mixer 1 1 and the second signal B 1 The frequency points are f L1 and f B1 , input high frequency local oscillator signal LO of high frequency mixer 1 1 The frequency point is f LO1 ; The frequency point output from high frequency mixer 1 is f L1 -f LO1 The first IF output signal L 11 Input the first low frequency mixer 2, the first low frequency local oscillator signal LO of the firs...

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Abstract

The invention discloses a multisystem compatible receiver frequency point selecting method which comprises the following steps: firstly, defining a parameter value, coding and establishing an initial frequency point set, then acquiring the fitness of each frequency point, judging whether a termination condition is met, and finally outputting a global optimal result. The invention has low requirements on the problem property and high computing efficiency, can solve a complicated optimization problem at limited cost, is suitable for a condition with large computing amount, has better global search performance, enables the process of solving the problem to be conveniently parallelized, and improves the processing efficiency. The invention can be used in the field of satellite navigation and communication, especially is suitable for the design of a satellite navigation multisystem compatible receiver, and has good application prospects in the aspects of military and civil use.

Description

technical field [0001] The invention belongs to the field of satellite navigation communication, and in particular relates to a frequency point selection method of a multi-system compatible receiver. Background technique [0002] At present, all global navigation satellite positioning systems in the world are in the stage of development or updating, relying only on a single global navigation satellite positioning system to achieve timing and positioning, no matter from the strategic level of national security or from the technical aspects of system reliability Considering all aspects, there are great potential safety hazards; therefore, multi-system compatibility has gradually become an effective means to reduce risks and improve system reliability and the development trend of the international global navigation satellite positioning industry. [0003] For multi-system compatible receivers, there are a large number of frequency points involved. If the frequency point selecti...

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Application Information

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IPC IPC(8): G01S19/42G01S19/48
Inventor 张晓林宋丹夏温博张展刘文婷
Owner BEIHANG UNIV
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