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Digital compensation of iq coupling in communication receivers

A digital compensation and receiver technology, applied in the field of digital compensation, can solve problems such as affecting the performance of the receiver

Active Publication Date: 2021-05-07
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Distortion in the circuit, such as local oscillator phase noise or gain / phase imbalance in the I and Q paths, will affect receiver performance

Method used

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  • Digital compensation of iq coupling in communication receivers
  • Digital compensation of iq coupling in communication receivers
  • Digital compensation of iq coupling in communication receivers

Examples

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Embodiment Construction

[0016]figure 1 It is a presentation of an example system 100 for iQ-coupled digital compensation according to an embodiment of the present invention. The digital compensation can be performed in a communication receiver. The communication receiver can include a wireless communication receiver, such as a WiFi receiver.

[0017]The radio frequency (RF) signal can be received by antenna 102. The received signal can be amplified using one or more low noise amplifiers (LNA) 104 and converted to baseband signals via downregulation. Waveforms can then be filtered using a low pass filter (LPF) 108 and amplified again using one or more variable gain amplifiers (VGA) 110. The resulting signal can be sampled using one or more modes / digital converters (ADCs) 112. The signal can be adjusted using the multiplier circuit 114, and the multiplier circuit 114 can correct the effect of the carrier frequency deviation. Fast Fourier Transform (FFT) circuit 116 can apply FFT to the signal and route the re...

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Abstract

The present invention relates to a receiver circuit comprising: a conversion circuit configured to down-convert a received radio frequency signal into a baseband signal; an analog-to-digital converter configured to convert the baseband signal sampling is a sampled signal; a fast Fourier transform (FFT) circuit configured to perform an FFT on the sampled signal; and a digital compensation circuit configured to compensate for IQ distortion in the frequency domain.

Description

[0001]Cross reference related application [0002]The present application claims priority to the US Provisional Patent Application No. 62 / 359, 372, filed on July 7, 2016, which is incorporated herein by reference.Technical field[0003]The present invention relates to a wireless data communication system, and a particular to, relate to digital compensation of IQ coupled in a communication receiver.Background technique[0004]In the wireless communication receiver, the radio frequency (RF) signal is amplified by one or more low noise amplifiers (LNA) and converted into a baseband. The resulting phase (I) waveform and orthogonal (Q) waveform were further enlarged and filtered prior to use a pair of mold / digital converters (ADCs). The sampling waveform is then processed so that the transmission bit sequence is recovered. Distortion in the circuit (eg, local oscillator phase noise or gain / phase imbalance in the I and Q path) will affect the performance of the receiver.Inventive content[00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/30
CPCH04B1/30H04L1/0045H04L27/22H04L27/3863H04L2027/003H04L2027/0038
Inventor H·沙菲M·保尔哈顿K·高达S·谢缇E·海达瑞A·法尔德R·巴盖里M·贾法里
Owner MICROCHIP TECH INC