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Data receiving method and receiving system based on adaptive moment estimation

A data receiving method and moment estimation technology, applied in the research field of communication technology, can solve the problem that high performance and low overhead of a PAM signal receiving device cannot be taken into account at the same time, and achieve the effects of superior performance, increased proportion and high performance

Active Publication Date: 2019-07-05
JINAN UNIVERSITY
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  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and to provide a data receiving method based on adaptive moment estimation, to solve the problem that the existing PAM signal receiving method and the receiving device cannot take into account the high performance and low overhead at the same time ; Also suitable for multi-order quadrature amplitude modulation QAM

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  • Data receiving method and receiving system based on adaptive moment estimation
  • Data receiving method and receiving system based on adaptive moment estimation
  • Data receiving method and receiving system based on adaptive moment estimation

Examples

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Embodiment 1

[0063] A data receiving method based on adaptive moment estimation, such as figure 1 shown, including the following steps:

[0064] The first step is to receive multi-order PAM / QAM modulation signals, and directly detect the received multi-order PAM / QAM modulation signals to obtain analog signals;

[0065] The second step is to perform analog-to-digital conversion on the analog signal to generate a digital signal;

[0066] The third step is to improve the time-domain equalization of the digital signal; that is, to delay and store the input of a small number of known training sequences, construct the training sample matrix, and use the training sample matrix to perform iterative batch training on the tap coefficients of the time-domain equalization, and obtain optimal tap coefficient; figure 2 It is a structural diagram of the time-domain equalizer training process based on the adaptive moment estimation iterative batch training algorithm;

[0067] details as follows:

[0...

Embodiment 2

[0105] A data receiving system based on adaptive moment estimation, such as Figure 7 shown, including:

[0106] It includes a direct detection unit 11 , an analog-to-digital conversion unit 12 , an inter-symbol interference elimination unit 13 and a decoding unit 14 . Wherein, the direct detection unit 11 , the analog-to-digital conversion unit 12 , the inter-symbol interference elimination unit 13 and the decoding unit 14 are connected in sequence.

[0107] The direct detection unit 11 is used to directly detect the received signal and convert the signal into an analog electrical signal.

[0108] The analog-to-digital conversion unit 12 is used for converting the analog electrical signal into a digital signal.

[0109]The inter-symbol interference elimination unit 13 is configured to perform inter-symbol interference elimination on the PAM / QAM signal and output a digital PAM / QAM signal. In this embodiment, the inter-symbol interference elimination unit 13 includes a time-...

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Abstract

The invention discloses a data receiving method based on adaptive moment estimation, which comprises the following steps of: eliminating intersymbol interference through a combined method consisting of a time domain feedforward equalizer, a rear filter and maximum likelihood sequence detection improved on the basis of the adaptive moment estimation method; the process specifically comprises the steps that a training sample matrix is constructed through a small number of training sequences, iterative batch training based on a self-adaptive moment estimation algorithm is conducted on time domainequalizer tap coefficients through the matrix, ideal equalizer tap coefficients are obtained, post-filtering and maximum likelihood detection are conducted on equalized signals, and signals with interference eliminated are obtained; an efficient adaptive moment estimation iteration batch equalization training method is adopted to replace a traditional time domain feedforward equalizer one-by-onesample training method, the interference elimination performance is high, and meanwhile the proportion of effective loads is increased.

Description

technical field [0001] The invention relates to the research field of communication technology, in particular to a data receiving method and a receiving system based on adaptive moment estimation. Background technique [0002] In the past decade, network traffic has exploded exponentially due to the emergence of cloud computing and various network applications. To cope with the ever-increasing amount of network data, large data centers are developing rapidly. The data center uses optical interconnection to transmit massive data, which has the characteristics of large capacity and low power consumption. With the rapid development of data centers, the transmission rate of short-distance optical interconnection systems reaches 400Gbit / s, and is expected to reach 1Tbit / s by 2020. Short-distance optical interconnection usually requires a low-cost, low-power, and low-overhead system. In order to transmit higher data rates within a limited bandwidth, multi-level modulation has b...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04L27/01H04L1/00
CPCH04L1/0054H04L25/03019H04L25/03025H04L25/03312H04L27/01
Inventor 周骥王海德刘龙刘伟平李朝晖
Owner JINAN UNIVERSITY
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