Method and device for realizing multiplication in satellite navigation signal modulation and demodulation
A satellite navigation signal and multiplication technology, which is applied in the field of satellite navigation signal processing, can solve problems such as waste of logic circuit resources, and achieve the effects of reducing resource overhead, improving efficiency, and simplifying design
Active Publication Date: 2015-09-23
TECHTOTOP MICROELECTRONICS
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[0007] The purpose of the present invention is to provide a multiplication realization method and device in satellite navigation signal modulation and demodulation, solve the actual state of the input quantity participating in the multiplication operation through the basic selection circuit and the multiplication operation table and cannot traverse the maximum state quantity that it can represent (2 to the nth power), the waste of logic circuit resources caused by the use of multipliers
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0022] figure 1 It is a schematic diagram of the traditional multiplier structure; figure 2 It is a schematic diagram of the multiplication realization structure of the embodiment of the present invention; image 3 It is a schematic flow chart of an embodiment of the present invention; Figure 4 It is a schematic diagram of numerical mapping in an embodiment of the present invention.
[0023] In the embodiment of the present invention, as attached figure 2 As shown, 201 and 202 are marked as input data in the figure. In practice, it depends on the application scenario. If it is a modulation c...
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The invention provides a multiplication implementation method in satellite navigation signal modulation and demodulation. The method comprises the following steps: intermediate frequency data and locally-generated carrier data are acquired; according to the intermediate frequency data and the carrier data, a corresponding multiplication result is searched for in a multiplication table; and a corresponding multiplication result is outputted. By the adoption of the technical scheme, a basic selection circuit and the multiplication table are adopted to replace a multiplication arithmetic unit. Thus, circuit design is simplified, operation efficiency is raised and resource consumption is minimized.
Description
technical field [0001] The invention relates to the technical field of satellite navigation signal processing, in particular to a method for realizing multiplication in satellite signal modulation and demodulation. Background technique [0002] GNSS (Global Navigation Satellite System, GNSS) uses navigation satellites for timing, positioning and ranging, and can provide all-weather, all-round and continuous real-time high-precision three-dimensional space for sea, land and air users around the world. , speed and time information. At present, GNSS includes GPS of the United States, GLONASS of Russia, Galileo system of the European Union, and Beidou navigation system of China. Taking the GPS system as an example, the system is mainly composed of three parts, namely the space part, the ground control part and the user device part. The space part is composed of 24 satellites, which are distributed in 6 track planes. The ground control part is composed of the main control stati...
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IPC IPC(8): G01S19/37G01S19/29
Inventor 毛磊
Owner TECHTOTOP MICROELECTRONICS