A Navigation Signal Correction Method for Transmitter Channel Imperfections
A technology of a navigation signal and a correction method, which is applied in the field of correction of the nonlinear characteristics of a transmitter, can solve the problems of high computational complexity, high resource consumption, and is not suitable for the use of spaceborne products, and achieves low computational complexity and low resource consumption. , the effect of improving the quality of the navigation signal
Active Publication Date: 2019-07-19
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a navigation signal correction method aimed at the non-ideality of the transmitter channel, and solve the problem that the existing technology cannot effectively solve the distortion compensation, high computational complexity, and resource consumption of the HPA working at the saturation point. Large and unsuitable for onboard products
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[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments, and the mode of the present invention includes but not limited to the following embodiments.
[0047] The present invention provides a navigation signal correction method aimed at the non-ideality of the transmitter channel, the flow of the method is as follows figure 1 As shown, it includes the following steps:
[0048] Step 1: Obtain the linear and nonlinear transfer characteristics of the transmitter channel;
[0049] Step 2: Establish a non-ideal distortion compensation simulation model of the transmitter channel according to the linear and nonlinear transmission characteristics of the transmitter channel obtained in step 1;
[0050] Step 3: Design a complex coefficient FIR digital baseband filter according to the non-ideal distortion compensation simulation model of the transmitter channel established in step 2;
[0051] Step 4: Implement the complex...
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The invention discloses a navigation signal correction method based on transmitter channel imperfection to solve the problems in the prior art of distortion compensation of HPA operating at the saturation point, high computational complexity, high resource consumption and non-appropriate application of spaceborne products. The navigation signal correction method comprises the following steps thatS1, linear and nonlinear transmission characteristics of a transmitter channel are obtained; S2, a transmitter channel imperfection distortion compensation simulation model is established; S3, a complex coefficient FIR digital baseband filter is designed; and S4, the complex coefficient FIR digital baseband filter in the S3 is achieved in a transmitter navigation signal baseband generating unit, and the effect is evaluated. The distortion correction effect of the navigation signal can be achieved through the complex coefficient FIR digital filter with fewer orders, computational complexity islow and resource consumption is low, and application in existing signal quality correction of all navigation signals of transmitter imperfection can be achieved.
Description
technical field [0001] The invention relates to the field of correction of non-linear characteristics of transmitters, in particular to a method for correcting navigation signals aimed at the non-ideality of transmitter channels. Background technique [0002] The Global Navigation Satellite System (GNSS) has become the most widely used navigation tool, which can provide accurate and reliable positioning and navigation services for land, aviation and navigation users. The quality of GNSS signals is an important factor affecting the realization of key performance and indicators of the system. With the use of new modulation technologies such as BOC, MBOC, and AltBOC modulation, and various constant envelope multiplexing technologies such as Interplex, CASM, and POCET, multiple components are often modulated on a single frequency point, occupying a larger bandwidth. The transmitter is the key business unit to realize the amplification of the navigation signal. Limited by the cur...
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IPC IPC(8): G01S19/37G01S19/40
CPCG01S19/37G01S19/40
Inventor 陈锡明潘虹臣刘禹圻陈林李杨杨溢
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP