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A device for improving the dynamic range of a receiver and its application method

A dynamic range and receiver technology, applied in electrical components, transmission systems, etc., can solve the problems of complex structure and application, and achieve the effect of improving dynamic range, reducing peak-to-average ratio, and simple structure

Active Publication Date: 2017-08-29
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the structure and application of these three methods appear to be complicated

Method used

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  • A device for improving the dynamic range of a receiver and its application method
  • A device for improving the dynamic range of a receiver and its application method
  • A device for improving the dynamic range of a receiver and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: a kind of use method of the device that improves receiver dynamic range, it comprises the following steps:

[0041] S1: The receiving antenna module receives the electromagnetic wave signal and converts it into an electrical signal h(t), and the electrical signal h(t) includes a useful signal and a self-interference signal from a local transmitter;

[0042] S2: The logarithmic compression module performs logarithmic compression on the electrical signal h(t) to obtain the compressed signal j(t); compresses the amplitude of the large signal and approximately linearly amplifies the small signal; among them, the compression function of the logarithmic compression for:

[0043]

[0044] In the formula, A and B are constants greater than 0;

[0045] S3: The receiving channel down-converts the compressed signal j(t) to obtain an intermediate frequency signal k(t), and performs appropriate amplification;

[0046] S4: ADC samples intermediate frequency signal ...

Embodiment 2

[0049] Embodiment 2: a kind of use method of the device that improves receiver dynamic range, it comprises the following steps:

[0050] S1: The receiving antenna module receives the electromagnetic wave signal and converts it into an electrical signal h(t), and the electrical signal h(t) includes a useful signal and a self-interference signal from a local transmitter;

[0051] S2: The logarithmic compression module performs trigonometric function compression on the electrical signal h(t) to obtain the compressed signal j(t); compresses the amplitude of the large signal and approximately linearly amplifies the small signal; where the compression function is:

[0052]

[0053] S3: The receiving channel down-converts the compressed signal j(t) to obtain an intermediate frequency signal k(t), and performs appropriate amplification;

[0054] S4: ADC samples intermediate frequency signal k(t) and outputs digital signal m(n);

[0055] S5: The digital recovery module restores the...

Embodiment 3

[0057] Embodiment 3: a kind of use method of the device that improves receiver dynamic range, it comprises the following steps:

[0058] S1: The receiving antenna module receives the electromagnetic wave signal and converts it into an electrical signal h(t), and the electrical signal h(t) includes a useful signal and a self-interference signal from a local transmitter;

[0059] S2: The logarithmic compression module performs polynomial compression on the electrical signal h(t) to obtain the compressed signal j(t); compresses the amplitude of the large signal and approximately linearly amplifies the small signal; where the compression function is:

[0060]

[0061] S3: The receiving channel down-converts the compressed signal j(t) to obtain an intermediate frequency signal k(t), and performs appropriate amplification;

[0062] S4: ADC samples intermediate frequency signal k(t) and outputs digital signal m(n);

[0063] S5: The digital recovery module restores the digital sig...

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Abstract

The invention discloses a device for improving the dynamic range of a receiver and a method for using the device. The device includes a receiving antenna module, a compression module, a receiving channel module, an ADC, and a digital recovery module; the receiving antenna module is connected to the compression module, and the compression module Connect to the receiving channel module, the receiving channel module is connected to the ADC, and the ADC is connected to the digital recovery module; the compression module compresses the amplitude of the large signal, and approximately linearly amplifies the small signal; the digital recovery module is used to obtain the The signal undergoes the inverse operation of the compression module. The present invention compresses the amplitude of the large signal through the compression module, and approximately linearly amplifies the small signal, thereby reducing the peak-to-average ratio of the received signal and improving the dynamic range of the receiver; the received digital signal is mapped according to the inverse of the compression module by using a lookup table The operation restores the digital signal corresponding to the original received signal, which greatly reduces the amount of calculation; it is suitable for high-power signals and broadband signals, and has a simple structure.

Description

technical field [0001] The invention relates to a conversion device from analog signal to digital signal and its application method in the field of digital communication, in particular to a device for improving the dynamic range of a receiver and its application method. Background technique [0002] In a full-duplex system, since the self-interference is much stronger than the received signal, it exceeds the dynamic range of the receiver, causing the receiver to saturate. To reduce the dynamic range of self-interfering signals, there are three main existing methods: [0003] 1. Reconstruct the self-interfering signal in the analog domain and then subtract it from the signal received by the antenna at the front end of the receiver. [0004] 2. Estimate the self-interference signal in the digital domain, up-convert the estimated signal to a radio frequency, and then subtract it from the signal received by the antenna at the front end of the receiver. [0005] 3. The transmit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16
Inventor 邵士海鲁宏涛潘文生沈莹徐强唐友喜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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