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A Low Complexity Optimal Decoding Algorithm for Bluetooth Low Energy

A low-power bluetooth and decoding method technology, applied in the field of wireless communication, can solve problems such as poor performance, and achieve the effects of improved sensitivity, easy implementation, and low power consumption

Active Publication Date: 2021-06-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the encoding physical layer of Bluetooth low energy, the performance of Viterbi decoding directly after phase demodulation by the receiver is poor. How to improve the decoding of low energy Bluetooth on the basis of not increasing the complexity is of great practical significance. question

Method used

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  • A Low Complexity Optimal Decoding Algorithm for Bluetooth Low Energy
  • A Low Complexity Optimal Decoding Algorithm for Bluetooth Low Energy
  • A Low Complexity Optimal Decoding Algorithm for Bluetooth Low Energy

Examples

Experimental program
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Embodiment Construction

[0055] Below through specific embodiment, further introduce the present invention.

[0056] As an embodiment, the present invention uses a computer to simulate the complete flow of Bluetooth GFSK signal encoding-modulation-demodulation-decoding. During the simulation process, a 500-bit data packet is randomly generated, the GFSK modulation index is 0.5, the upsampling rate is 2, and the encoding method stipulated in the Bluetooth low energy protocol is adopted, respectively in the Bluetooth low energy S=2 encoding scheme and the S=8 encoding scheme Next, 1000 Monte Carlo experiments were performed. The final bit error rate performance and comparison are as follows image 3 and Figure 4 As shown, where the x-axis is the simulated signal-to-noise ratio, and the y-axis is the bit error rate after decoding at the receiving end.

[0057] The hard decoding algorithm in the figure (the line with a circle in the middle) corresponds to the hard decision (0 / 1) of the demodulation ph...

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Abstract

The invention belongs to the technical field of wireless communication, and specifically relates to a low-complexity optimized decoding algorithm of low-power bluetooth. The core of the decoding algorithm of the present invention is to calculate the optimal input of Viterbi decoding according to the distribution of Gaussian frequency shift keying modulation (GFSK) demodulation output; Use this information as input for Viterbi decoding. The invention considers the actual application scene of the low-power bluetooth, has low algorithm complexity, and can significantly reduce the bit error rate and improve the sensitivity of the receiver.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a low-complexity optimized decoding algorithm of low-power bluetooth. Background technique [0002] Bluetooth low energy technology is one of the representative technologies of the Internet of Things. It is widely used in computing devices with low cost and low power consumption, as well as short-range wireless communication scenarios with low data rates and low duty cycles. With the development of the Internet of Things, in the Bluetooth protocol version 5.0 in 2016, Bluetooth Low Energy added a new encoding physical layer and two encoding schemes, and the corresponding information transmission rates are 500kb / s and 125kb / s respectively. The coding physical layer enhances the stability of Bluetooth signal transmission, and the transmission distance of Bluetooth low energy signals can be increased by up to 4 times without increasing the transmission pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L27/20
CPCH04L1/0054H04L1/0058H04L1/0061H04L27/2071
Inventor 蒋轶张思维杜晴鹤王昕
Owner FUDAN UNIV