Programmable radio frequency down-conversion device

Abstract

The invention discloses a programmable radio frequency down-conversion device which comprises an external clock, an FPGA, a PROM, a TDM digital tuner chip, an AGC module and an external filtering module; wherein the external clock is used for providing the clock needed in the work of the FPGA, the PROM and the TDM digital tuner chip. The frequency conversion device can realize frequency down-conversion of signals with 51-858 MHz, and is internally integrated with a local oscillator and an SAW filter; an output end is processed by filtering and can output an intermediate frequency signal by difference; and an AGC compensating device and an external filter circuit are arranged outside the output; therefore, the signal performance can be greatly improved. The device has the characteristics oflow cost and high signal output performance, and has the greatest characteristic of a method of combining a special chip module and an FPGA programming device, and is added with an AGC automatic gaincontrol module and the external filtering module, thus ensuring the excellent performance of signal output.

Description

Technical field [0001] The invention specifically relates to a programmable radio frequency down-conversion device, which belongs to the communication field. Background technique [0002] In wireless communication, the conversion of radio frequency signals to intermediate frequency signals is often required. The traditional down-conversion device is built with a large number of analog components, and has disadvantages such as poor anti-interference ability and low reliability, and is large in size and energy-consuming. After configuration, it can only achieve down-conversion of a specific frequency. These all make it limited in further applications. [0003] With the development and progress of science and technology, the technology of RF down-conversion devices has been continuously updated and matured. Now, there are three main ways to realize digital down converter at home and abroad: [0004] (1) Use existing dedicated chips; [0005] (2) Independently develop dedicated chips; ...

AI Technical Summary

Problems solved by technology

Commercial special-purpose chips require low data rates, are expensive, and have low flexibility; independent research and development of special-purpose chips is almost impossible in small-scale R&D and production due to high costs and domestic technical constraints; currently , with the development of DSP device and FPGA device technology, it is possible to realize the digital down-converter by self-built platform, but for small-scale applications, this will inevitably increase the complexity and cost of the design, which seems overkill

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