New Miller Codes for Run-Length Control in Visible Light Communications

Lu, Xuanxuan; Li, Jing

doi:10.1109/twc.2017.2785398

Cited by 16 publications

(27 citation statements)

References 25 publications

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“…Traditionally, Miller decoding generates a clock signal with the same frequency as the subcarrier and then executes the XOR operation on the clock signal and a received Miller code [12][13][14]. Figure 4(a) shows an example of a Miller 2 code with the subcarrier removing.…”

Section: Problem Descriptionmentioning

confidence: 99%

“…①Multiplying: get ZðtÞ from ( 7); ② Low pass filtering: getŝðtÞ from ( 8), ( 9); ③ Envelope shaping: getŝ o ðtÞ from (11); ④ Synthesizing: get anotherZðtÞ from ( 10) and anotherŝ o ðtÞ by repeating (8)(9)(10)(11) and then getsðtÞ from ( 12); ⑤ Matched filtering: get s _ ðtÞ from ( 13); ⑥ Decoding: getŷ i from (14). are applied to encoding, and XOR operation [13,19] is applied to decoding (ii) Mille4PMD and Miller8PMD: Miller 4 and Miller 8 are applied to encoding, and Algorithm 1 is applied to decoding.…”

Section: Inputmentioning

confidence: 99%

“…Thus, the Miller code performs better on high-frequency noises. Traditional Miller decoding uses XOR operation to remove subcarriers [12][13][14][15], which can resist the frequency drift that exists in the FM0 code. However, in the physical layer separation, the Miller code still cannot eliminate the separation noise after the XOR operation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Physical‐Layer UHF RFID Tag Collision Resolution Based on Miller Code

Zeng

Ding

2021

Wireless Communications and Mobile Computing

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In an ultrahigh frequency (UHF) radio frequency identification (RFID) system, the throughput can be greatly improved by collision resolution on a physical layer when tags collide, and high-performance coding technology can improve the bit error rate (BER) performance of the physical-layer separation. Most of the traditional physical collision resolutions focus on the code with a single subcarrier. This paper pays more attention to Miller code with multiple subcarriers and proposes a novel physical-layer separation method based on the Miller code. In this method, the separated collision signals are multiplied by clock signals with the same frequency as the subcarrier to complete the frequency shift. And then, a coherent demodulation and a low-pass filter are used to remove high-frequency separation noise. In the simulation, the Miller code with more subcarriers has lower BER than FM0 code with a single carrier. Especially when Miller 8 is selected, the separation efficiency and BER performance of the proposed method are 4 dB higher than those of the traditional XOR method at lower SNR.

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Section: Problem Descriptionmentioning

confidence: 99%

Section: Inputmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Physical‐Layer UHF RFID Tag Collision Resolution Based on Miller Code

Zeng

Ding

2021

Wireless Communications and Mobile Computing

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“…On the down-side, the Manchester code has the disadvantage of larger bandwidth requirements as compared to other common codes. Accordingly, in addition to the classical Manchester code, the performances of the Miller code [70,71] are also investigated. The Miller code has rather similar advantages as the Manchester code, but it is also bandwidth-efficient.…”

Section: Modulation and Coding Techniquesmentioning

confidence: 99%

Design and Intensive Experimental Evaluation of an Enhanced Visible Light Communication System for Automotive Applications

Avatamanitei

Căilean

Done

et al. 2020

Sensors

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As the interest toward communication-based vehicle safety applications is increasing, the development of secure wireless communication techniques has become an important research area. In this context, the article addresses issues that are related to the use of the visible light communication (VLC) technology in vehicular applications. Thus, it provides an extensive presentation concerning the main challenges and issues that are associated to vehicular VLC applications and of some of the existing VLC solutions. Moreover, the article presents the aspects related to the design and intensive experimental evaluation of a new automotive VLC system. The experimental evaluation performed in indoor and outdoor conditions shows that the proposed system can achieve communication distances up to 50 m and bit error ratio (BER) lower than 10−6, while being exposed to optical and weather perturbations. This article provides important evidence concerning the snowfall effect on middle to long range outdoor VLC, as the proposed VLC system was also evaluated in snowfall conditions. Accordingly, the experimental evaluation showed that snowfall and heavy gust could increase bit error rate by up to 10,000 times. Even so, this article provides encouraging evidence that VLC systems will soon be able to reliably support V2X communications.

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“…In addition, Lee and Kwon have proposed the use of puncturing and pseudonoise sequence scrambling with compensation symbols (CSs) [13]. This proposal can achieve very good BER performance; however, puncturing with CSs will lead to redundant bits in [16]. She also proposed an improved version of Viterbi algorithm, termed mnVA to further enhance the performance of her proposed eMiller.…”

Section: Introductionmentioning

confidence: 99%

Hardware Implementation of A Non-RLL Soft-decoding Beacon-based Visible Light Communication Receiver

Nguyen

Tran

et al. 2018

2018 International Conference on Advanced Technologies for Communications (ATC)

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Visible light communication (VLC)-based beacon systems, which usually transmit identification (ID) information in small-size data frames are applied widely in indoor localization applications. There is one fact that flicker of LED light should be avoid in any VLC systems. Current flicker mitigation solutions based on run-length limited (RLL) codes suffer from reduced code rates, or are limited to hard-decoding forward error correction (FEC) decoders. Recently, soft-decoding techniques of RLL-codes are proposed to support soft-decoding FEC algorithms, but they contain potentials of high-complexity and timeconsuming computations. Fortunately, non-RLL direct current (DC)-balance solutions can overcome the drawbacks of RLLbased algorithms, however, they meet some difficulties in system latency or inferior error-correction performances. Recently, non-RLL flicker mitigation solution based on Polar code has proved to be an optimal approach due to its natural equal probabilities of short runs of 1's and 0's with high error-correction performance. However, we found that this solution can only maintain the DC balance only when the data frame length is sufficiently long. Accordingly, short beacon-based data frames might still be a big challenge for flicker mitigation in such non-RLL cases. In this paper, we introduce a flicker mitigation solution designed for VLC-based beacon systems that combines a simple pre-scrambler with a Polar encoder which has a codeword smaller than the previous work 8 times. We also propose a hardware architecture for the proposed compact non-RLL VLC receiver for the first time. Also, a 3-bit soft-decision filter is introduce to enable softdecoding of Polar decoder to improve the performance of the receiver.

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New Miller Codes for Run-Length Control in Visible Light Communications

Cited by 16 publications

References 25 publications

A Physical‐Layer UHF RFID Tag Collision Resolution Based on Miller Code

A Physical‐Layer UHF RFID Tag Collision Resolution Based on Miller Code

Design and Intensive Experimental Evaluation of an Enhanced Visible Light Communication System for Automotive Applications

Hardware Implementation of A Non-RLL Soft-decoding Beacon-based Visible Light Communication Receiver

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