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rf receiver and rf receiving method

A receiver and signal technology, applied in the direction of oscillation conversion angle demodulation, digital transmission system, electrical components, etc., can solve the problem that the coefficient is not optimal

Active Publication Date: 2017-05-24
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0043] The coefficients are not optimal if a small signal at frequency -0.3 is desired (not shown in the figure)

Method used

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  • rf receiver and rf receiving method

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Embodiment Construction

[0079] Embodiments relate to RF receive systems using IF quadrature mixing with further mixing and channel filtering in the digital domain to isolate the desired frequencies. The coefficient estimation unit is for generating phase correction coefficients and amplitude correction coefficients from the filtered in-phase and quadrature desired signals and from the filtered in-phase and quadrature mirror signals.

[0080] Figure 4 shows the pair according to one embodiment figure 1 Modification of the digital correction section to form digital section 42. Digital mixer 50 further processes the I' channel and digital mixer 51 further processes the Q' channel. Mixer 52 mixes the I' and Q' signals with the desired frequencies and mixer 50 mixes the I' and Q' signals with the negative of those frequencies. In this way, the required IQ signal and the mirrored IQ signal are obtained.

[0081] An analog-to-digital converter may receive multiple channels by way of example, the desire...

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Abstract

An RF receiver system and method is to use IF quadrature mixing, which has further mixing in the digital domain and channel filtering to isolate the desired frequency. The coefficient estimation unit is used to generate phase correction coefficients and amplitude correction coefficients from filtered noninverting and quadrature required signals and from filtered noninverting and quadrature mirror signals.

Description

technical field [0001] This application relates to coefficient estimation for digital IQ calibration. Background technique [0002] Receiver systems often receive higher frequency RF signals using so-called IQ systems, where the RF signal is mixed with sine and cosine waves (so-called quadrature mixing) to produce I (in-phase) and Q (quadrature-phase) signals . [0003] When processed digitally, this so-called intermediate frequency (IF) signal is further processed through amplifiers, filters and ADCs (analog-to-digital converters). [0004] figure 1 A possible implementation of such a receiver system is shown. [0005] The receiver has an analog front end 10 and a digital correction section 12 . In the analog section, the input RF signal is mixed with an intermediate frequency carrier using mixer 12 to produce I and Q components. These are filtered by a filter 16 and then amplified and converted into digital signals by an analog-to-digital converter 18 . The output of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16
CPCH04L27/3863H03D3/009H04B1/30H04B2001/305H03D7/1466H04B1/16
Inventor 罗伯特·鲁滕吕西安·约翰内斯·布伦默斯扬·范信德瑞
Owner NXP BV