Research On Shortwave Signal Receiver

In recent years, with the rapid development of wireless communications, people in life have been unable to break away from wireless communications technology, and shortwave communication technology is an important branch of wireless communication, it has a very high research and development value.This paper studied the front-end of a large dynamic RF receiver and high-speed digital acquisition and transmission, in the foundation of referencing to a large number of domestic and international advanced ideals, drawing on the experience of each design in shortwave receiver such as:filter design, low-noise amplifier design and AGC design, with ADC circuit design and FPGA 10 Gigabit Ethernet IP cores, developing and initial implementing the shortwave large dynamic receive and 10 Gigabit Ethernet transmit function. Such a system is easy to move, hide and can not be destroyed easily. This receiver has full band and large dynamic processing ability. In the design, low-noise amplifier and high speed data amplify technology and method for transferring involved a certain innovation and unique.This paper is responsible for the front-end portion of RF receiver channel, data acquisition portion, scheme research and design of 10 Gigabit transmissions. In order to improve flexibility and digitization of overall system, the front-end analog portion of this RF receiver having only band-pass filter, low-noise amplifier and automatic gain control functions, signal is sampled by AD9467 a 16it,250MPS high performance ADC, then transmitted by FPGA with 10 Gigabit Ethernet interface to the rear end of an high-performance processor, the high-performance DSP or GPU is going to do a variety of digital signal processing. Finally competed each module circuit board, presented the test results of all the indicators and verified the feasibility and flexibility of the program.