零中频接收机及其直流泄漏抑制方法

Zero intermediate frequency receiver and direct current leakage suppression method thereof

Abstract

本发明实施例公开了一种零中频接收机及其直流泄漏抑制方法,分别抓取数模转换芯片输出的I路数据和Q路数据,再分别计算抓取的I路数据和Q路的加和平均值,得到I路和Q路的直流泄漏校正差值,将接收到的I路数据和Q路数据分别减去各自的直流泄漏校正差值,既完成了I/Q数据的直流泄漏校正。由于是根据实时接收到的数据来计算校正差值,再根据此校正差值对实时接收到的数据进行校正,因此本发明实施例零中频接收机及其直流泄漏抑制方法的实时性强,且校正方法简单有效。
The invention discloses a zero intermediate frequency receiver and a direct current leakage suppression method thereof. The zero intermediate frequency receiver direct current leakage suppression method includes: respectively grabbing I route data and Q route data output by a digital-to-analogue conversion (DAC) chip, then respectively computing weighted average values of the grabbed I route data and Q route data to obtain direct current leakage rectifying differences of the I route and the Q route, subtracting respective direct current leakage rectifying differences from the received I route data and Q route data, and namely finishing direct current leakage rectifying of the I/Q data. The rectifying difference values are calculated according to received data in real time and the real-time received data is rectified according to the rectifying difference values, so that the zero intermediate frequency receiver and the direct current leakage suppression method thereof are strong in real time, and the rectifying method is simple and effective.

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