The invention provides a framing method of the 
receiver front-end of multimode 
satellite navigation, which discloses a frontend 
chip of the receiving RF of multimode 
satellite navigation which is applicable to a plurality of 
satellite navigation systems. The method of the invention comprises six modules which are a multimode PF frontend low-
noise amplifier /  mixer group of monolithic integrated and completed type, a reconfigurable image rejection filter, a band-
variable gain amplifier, an analog-to-digital converser, a configurable 
frequency synthesizer and a multimode 
control logic module. The reconfigurable module can realize the distribution of functional parameters according to the requirement through the multimode 
control logic management, causing the working performance to be optimized and meeting the 
functional requirement on the 
RF front end of the receiving platform of multimode 
satellite navigation. The framing method of the invention requires no external supporting accessories and has the advantages of being easy to carrying out 
cascade connection with preceding and backward stages, high 
gain, small 
noise coefficient and good integration. The invention is applied to the current communication and navigation 
positioning equipment for receiving multimode 
satellite navigation signals, has a wide application range and quite remarkable economic benefit, is largely 
on demand, supports the integration making use of multimode 
satellite navigation positioning information, improves positioning precision and has large social benefit.