WLAN transceiver with carrier leakage correction and compensation functions

Abstract

The invention provides a WLAN transceiver with the carrier leakage correction and compensation functions. An ADC for collecting data or a DAC for carrier leakage compensation and I / Q mismatch compensation does not need to be introduced into a radio frequency part of the WLAN transceiver, only a simple correction path needs to the designed, the correction and compensation are achieved through a digital base band, and very high precision can be achieved only by carrying out a few iterations.

Description

technical field [0001] The invention relates to the technical field of broadband wireless communication, in particular to a WLAN transceiver with carrier leakage calibration and compensation functions. Background technique [0002] The wireless communication industry has grown rapidly in the past ten years, especially the wireless local area network has been widely used in many occasions for wireless transmission, such as offices, hospitals, home networks, and the Internet of Things. Low-cost solutions have promoted the development of wireless communication technology. One of the low-cost implementation methods is to save expensive external devices and achieve a high degree of integration. Based on this consideration, WLAN transceivers basically adopt a direct frequency conversion structure and an orthogonal modulation method. [0003] figure 1 It is a schematic diagram of a basic structure of a WLAN transceiver. Please refer to figure 1 , the WLAN transceiver includes: ...

AI Technical Summary

Problems solved by technology

Carrier leakage will affect the accuracy of the transmitted signal power. Excessive carrier leakage will affect the EVM of the transmitted signal, resulting in a decrease in the quality of the transmitted signal

[0012] In existing WLAN transceivers, the digital-to-analog converter ADC for data acquisition and the DAC for carrier compensation and I / Q mismatch compensation are usually used in the radio frequency part to reduce the impact of carrier leakage and I / Q mismatch on signal transmission quality. However, the above-mentioned implementation method needs to add new ADC components and DAC components, and the implementation cost is relatively high. How to reduce the impact of carrier leakage and I / Q mismatch on signal transmission quality at a relatively low cost has become an urgent problem for those skilled in the art. The problem

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