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A mixed carrier communication method based on the optimal scale factor selection of adc based on signal probability density

A scale factor, signal probability technology, applied in baseband system components, shaping networks in transmitter/receiver, multi-frequency code systems, etc., can solve problems such as poor BER performance and achieve optimal reliability.

Active Publication Date: 2017-06-20
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention aims to solve the problem of poor BER performance of the existing hybrid carrier communication method using fixed scaling factors and dynamic selection of AGC scaling factors, thereby providing a hybrid carrier communication method based on signal probability density-based ADC optimal scaling factor selection

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  • A mixed carrier communication method based on the optimal scale factor selection of adc based on signal probability density
  • A mixed carrier communication method based on the optimal scale factor selection of adc based on signal probability density
  • A mixed carrier communication method based on the optimal scale factor selection of adc based on signal probability density

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specific Embodiment approach 1

[0033] Specific implementation mode 1. Combination figure 1 Describe this specific implementation mode, its signal transmission method of the mixed carrier communication method selected based on the ADC optimal scaling factor of the signal probability density:

[0034] The N subcarriers input by the data source are digitally mapped to the baseband, modulated by 4-WFRFT with a parameter of α, and transmitted to the channel after inserting a cyclic prefix, D / A conversion and up-conversion operations;

[0035] Its signal receiving method:

[0036] The signal received from the channel is down-converted and processed, and A / D conversion is performed under the optimal scale factor A, and then the cyclic prefix is ​​removed, demodulated by 4-WFRFT with parameter -α, and digital baseband demapping is performed After the output, complete the mixed carrier communication based on the selection of the ADC optimal scale factor based on the signal probability density;

[0037] The selecti...

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Abstract

The invention relates to the field of wireless communication, in particular to a method for hybrid carrier communication based on ADC optimal scaling factor selection of the signal probability density. The problem that the BER performance of an existing hybrid carrier communication method adopting fixed scaling factor and AGC scaling factor dynamic selection is poor is solved. The method comprises the steps that digital baseband mapping is carried out on N subcarriers input by a data source, 4-WFRFT with a parameter as alpha is used for modulation, and the subcarriers are transmitted to a channel after cyclic prefixes are inserted and D / A conversion and up-conversion operation are carried out; according to the signal receiving method of the method, down-conversion postprocessing is carried out on signals received from the channel, A / D conversion is carried out under the optimal scaling factor A, then the cyclic prefixes are removed, 4-WFRFT with the parameter as alpha is used for modulation, output is carried out after digital baseband mapping is carried out, and hybrid carrier communication based on ADC optimal scaling factor selection of the signal probability density is achieved. The method is suitable for hybrid carrier communication occasions.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a mixed carrier communication method for selecting an ADC optimal scaling factor. Background technique [0002] Analog-to-digital converter (ADC) plays a pivotal role in modern wireless communication systems. As people's demand for data rate increases increases, GHz spectrum and Gb / s throughput have become a trend at this stage. However, as the bandwidth of the communication system increases, the ADC in the system needs to have high speed and high precision. However, an ADC with fast speed and high precision is expensive and consumes a lot of power, which is very unfavorable for small terminals. Considering the above factors, a feasible way is to reduce the bit precision of the ADC (4-7bits): high sampling rate, low power consumption and low price are obtained by sacrificing the precision, but at the same time, the low-precision ADC causes Signal nonlinear distortion also...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03
Inventor 梅林王晓鲁沙学军
Owner HARBIN INST OF TECH
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