Programmable radio frequency down-conversion device

A frequency conversion device, radio frequency technology, applied in electrical components, transmission systems, modulation transfer, etc., can solve the problems of increasing design complexity and cost, low flexibility, low data rate, etc., to achieve easy to find, low cost, functional powerful effect

Inactive Publication Date: 2010-02-03
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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; cur

Method used

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  • Programmable radio frequency down-conversion device
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  • Programmable radio frequency down-conversion device

Examples

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Example Embodiment

[0040] Example: FPGA1 uses XC2S15 of XILINX SPARTAN series, PROM2 uses XC18V512 of XILINX XC18V00 series matched with FPGA1, and TDM digital tuner chip 3 uses Philips TDM1316AL / IHP chip.

[0041] Such as figure 2 Shown here is an implementation circuit of the AGC module 4 of the present invention, including a control circuit and a detection circuit. The control circuit is a triode BG 1 6 and resistance R 1 9. Capacitance C 1 8 constitutes a common emitter amplifier circuit, the current I AGC enlarge. Triode BG 2 7 and resistance R 1 9. Resistance R 2 11. Capacitance C 2 10 forms a common base amplifier circuit, which can work in a wide frequency band. Capacitance C 1 8 both ends are connected with +5V power supply, used to supply power to AGC module 4, capacitor C 1 8 with triode BG 1 6 One end of the connection is grounded, resistance R 2 11 and capacitance C 2 10 One end of the connection is grounded, resistance R 3 14 connected to the transistor BG 1 6 base, resistance R ...

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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; ...

Claims

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Application Information

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IPC IPC(8): H04B1/16H03D7/00
Inventor 李署坚王江浩杨文慧孙宇明
Owner BEIHANG UNIV
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