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2024 Biomedical Circuits and Systems Conference

作者： Lin, Chuer Han, Cheng Yu, Shan Zhang, Zhiwei Mao, Jingna Chinese Acad Sci Inst Automat Beijing 100190 Peoples R China Univ Chinese Acad Sci Sch Future Technol Beijing 100049 Peoples R China CAS Ctr Excellence Brain Sci & Intelligence Techn Shanghai 200031 Peoples R China

ISBN: (纸本)9798350354966;9798350354959

Compared with conventional communication technologies, body channel communication (BCC) shows more security and better energy efficiency by utilizing the human body as a transmission medium. This paper presents an integrated BCC control processor including a transmitter, a receiver, and a data processing unit. manchester coding is used with the advantages of less low-frequency interference and better use of the characteristics of the human body channel. Instead of using a Field Programmable Gate Array (FPGA), data processing is integrated digitally to reduce the overall area and power consumption. The BCC control processor parameters can be configured flexibly via Serial Peripheral Interface (SPI), which is used more conveniently with other commercial chips. The proposed control processor has successfully implemented data transmission and processing with manchester code and SPI protocol.

关键词： body channel communication transceiver manchester code data processing

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Group manchester code Modulation for Medical In-body WBAN Systems

Group Manchester code Modulation for Medical In-body WBAN Sy...

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17th Asia-Pacific Conference on Communications (APCC)

作者： Choi, Il Muk Won, Kyung Hoon Choi, Hyung-Jin Sungkyunkwan Univ Sch Informat & Commun Engn Suwon South Korea

ISBN: (纸本)9781457703881

In this paper, we propose group manchester code (GM) modulation scheme for medical in-body wireless body area network (WBAN) systems. In IEEE, the WBAN system is assigned as 802.15. Task Group 6 (TG6), and the related standardization is being progressed. Recently, in this Group, group pulse position modulation (GPPM), which can obtain data rate increase by grouping pulse position modulation (PPM) symbols, is proposed as a new modulation scheme for low-power operation of WBAN system. However, the conventional method suffers from BER performance degradation due to the absence of gray coding and its demodulation characteristics. Therefore, in this paper, we propose a modified GM scheme which groups manchester code instead of PPM. In the proposed GM scheme, a low-complexity maximum likelihood (ML) demodulation method is employed in order to maximize the BER performances. Also, log likelihood ratio (LLR) decision method is proposed to employ the Turbo code as forward error correction (FEC). Finally, we verified that the proposed method has a good performance and is an appropriate scheme for in-body WBAN system through extensive performance evaluation.

关键词： WBAN Grouping PPM manchester code GPPM GM

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A manchester code Communication Protocol Suitable for Power Electronics System 43

A Manchester Code Communication Protocol Suitable for Power ...

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43rd Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Ren, Qiang Xiao, Fei Ai, Sheng Hao, Xiaoliang Naval Univ Engn Natl Key Lab Sci & Technol Vessel Integrated Powe Wuhan Hubei Peoples R China

ISBN: (纸本)9781538611272

To satisfy the requirements of complex distributed power electronic system (PES) communication, this paper has proposed a single optic-fiber link data communication protocol based on the manchester code due to an vacancy in the commonly-adopted protocols, analyzed the encoding and decoding principle of manchester code, defined the formats of command frame and data frame, calculated the communication time and error rate, and described the mechanism of fault identification and handing. All this leads to a distributed master-slave control structure suitable for high-power multiphase inverter and a point-to-point data communication mode. Experiments prove the protocol to be correct and feasible. The manchester code communication protocol based on FPGA program is simple in the structure of hardware and software. When the system clock is 100MHz, the communication bandwidth can reach 40Mbps, which can meet the needs for communication of PES with kHz or 10kHz switching frequency.

关键词： power electronics system distributed control manchester code communication protocol multiphase inverter

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A simple diagram for data transmission using manchester code

A simple diagram for data transmission using Manchester code

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International Conference on Advanced Technologies for Communications (ATC)

作者： Trinh Anh Vu Pham Van Thanh VNU Univ Engn & Technol VNU UET Fac Elect & Telecommun Hanoi Vietnam Univ Fire Fighting & Prevent Fac Automat & Tech Equipment Fire Fighting Preven Hanoi Vietnam

ISBN: (纸本)9781509027118

The paper proposes a simple diagram for data transmission on the frequency of 2.4GHz based on the manchester code. Unlike the classical methods, the receiver usually performs some feedback loops to stabilize the gain to control the sampling at exact position (timing) of the symbol or to synchronize and track frequency. The proposed diagram only uses a cut-off signal to detect data directly without any feedback loops. Although it is simple, the proposed diagram still obtains high stable operation and wide input dynamic range. The experiment was tested by transmitting a 64kbit image file through an embedded FPGA system. Due to the use of manchester code, then the cost of the proposed method depends only on the bandwidth. Furthermore, the proposed diagram is more suitable for indoor transmission applications and transmitting high-speed data by using Ultra Wide Band (UWB) pulses.

关键词： simple diagram manchester code feedback loop indoor transmission applications

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Optical label switching based on manchester code plus NRZ modulation

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OPTICAL FIBER TECHNOLOGY 2021年 61卷 102387-102387页

作者： Lu, Yang Wang, Yaoyao Hu, Linghuan Du, Xun Li, Ju Li, Hang Bi, Meihua Hangzhou Dianzi Univ Sch Commun Engn Hangzhou Peoples R China Taizhou Vocat & Tech Coll Taizhou Peoples R China

Optical label switching (OLS) is regarded as one promising solution for the packet-based optical switching. In this paper, a novel modulation, i.e., manchester code + NRZ modulation is proposed for OLS. The manchester coded payload signal the NRZ label signal are combined and then modulated onto an optical carrier by only one ASK modulator. The manchester coded payload signal and the NRZ label signal are recovered by half-bit-delayed differential and a low-speed ASK receiver, respectively. Better than traditional orthogonal modulation, the proposed manchester code + NRZ modulation requires no non-amplitude modulation and only one ASK modulator, reducing the equipment cost, modulation loss and operation complexity. The coding is simple and decoding is not required. According to theoretical analysis and simulation test, the induced crosstalk decreases with the bit rate ratio. The tested results verify the feasibility of the OLS based on the proposed manchester code + NRZ modulation.

关键词： optical label switching (OLS) Orthogonal code manchester code

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Dimming Control for Visible Light in a Wireless Identification System Using manchester code

IEEE SENSORS LETTERS

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IEEE SENSORS LETTERS 2021年第11期5卷 1页

作者： Lee, Seong-Ho Seoul Natl Univ Sci & Technol Dept Elect & IT Media Engn Seoul 01811 South Korea

A wireless identification system was developed in which visible light was simultaneously used for illumination and for transmitting an interrogating signal from a reader to a transponder. We used the manchester code to modulate the visible light to ensure flicker-free lighting, and the duty factor of the manchester code was utilized for dimming control. The average optical power of the light emitting diode (LED) array in the reader, and the solar cell current in the transponder, increased when the duty factor of the manchester code was increased. In experiments, the capture range of the identification system was about 2.3 m when the duty factor was 90%. This configuration can be useful in an automatic vehicle identification system for security checks or fare calculation, using an LED lamp installed at toll gates or parking places.

关键词： codes Transponders Light emitting diodes Optical transmitters Optical signal processing Optical pulses Photovoltaic cells Optical sensors capture range dimming control duty factor manchester code solar cell visible light wireless identification system

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Group manchester code Modulation for Medical In-body WBAN Systems

Group Manchester code Modulation for Medical In-body WBAN Sy...

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Asia-Pacific Conference on Communications

作者： Il Muk Choi Kyung Hoon Won Hyung-Jin Choi School of information and Communication Engineering Sungkyunkwan University

ISBN: (纸本)9781457703898

关键词： WBAN Grouping PPM manchester code GPPM GM

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All-optical TOAD-based manchester and Gold code generators

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JOURNAL OF OPTICS-INDIA 2019年第3期48卷 442-451页

作者： Mandal, Ashis Kumar Chakur Haris Seminary High Sch Dept Phys Sci Howrah W Bengal India

Spread spectrum is a modulation technique where the signal occupies a bandwidth much larger than the minimum necessary to send the information. An all-optical manchester and Gold code generators are implemented using terahertz optical asymmetric demultiplexer-based D flip-flop and exclusive-OR logic gates in a configuration exactly like the standard electronic setup. The all-optical nonreturnable zero-to-manchester conversion is implemented in our simulation system, and bit error rate performance (10 Gbit/s) of the format conversion is explained. Transmission performances of the converted manchester-coded signal are addressed with the transmission length and received optical power. The proposed manchester and Gold code generators scheme has been theoretically demonstrated in this paper. We are assigned distinguishable unique codes with low cross-correlation values among each other in multiuser environment. The Gold sequences are an important class of sequences which allow construction of long sequences with three-valued cross-correlation function. The Gold sequences are created from pairs of preferred m-sequences of the same length by modulo-2 addition. The performances of those proposed optical designs are evaluated by numerical simulation that confirms its feasibility in terms of the choice of the critical parameters.

关键词： Terahertz optical asymmetric demultiplexer (TOAD) R-S and D flip-flop manchester code Gold code

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VLSI Architecture Design of FM0/manchester codec With 100% Hardware Utilization Rate for DSRC-Based Sensor Nodes in ITS Applications

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IEEE SENSORS JOURNAL 2015年第12期15卷 6875-6889页

作者： Lee, Yu-Hsuan Pan, Cheng-Wei Tsai, Fang-Hsu Yuan Ze Univ Dept Elect Engn Innovat Ctr Big Data & Digital Convergence Taoyuan 32003 Taiwan

Dedicated short-range communication (DSRC) plays an important role in sensor networking for intelligent transportation system applications. How to achieve a higher hardware efficiency becomes an attractive issue to design each critical building bock in sensor node. DSRC standards usually adopt either FM0 code or manchester code as a coding technique to enhance signal reliability. In this paper, a fully reused VLSI architecture of FM0/manchester codec with a hardware utilization rate (HUR) of 100% is proposed for DSRC-based sensor node. It is based on the half-cycle processing model (HCPM). The HCPM includes three core techniques: 1) half-cycle logic partition;2) reused-based retiming;and 3) Boolean function reshaping. The HCPM can improve the HUR of FM0/manchester codec from 27.33% to 100% with the reduction of the transistor count from 86 to 66. A 100% HUR means every transistor is activated;therefore, a more power is consumed. With a design tradeoff between HUR and power consumption, this paper still presents a higher energy efficiency. This paper is realized in TSMC 0.18-mu m 1P6M CMOS technology. The silicon area of core circuit is 33 x 120 mu m(2). The experiment results demonstrate that this paper presents a competitive performance with 100% HUR compared with the existing works. With this paper, DSRC-based sensor nodes can present a 100% HUR FM0/manchester codec, fully supporting DSRC standards of Europe, USA, and Japan.

关键词： DSRC VLSI FM0 code manchester code hardware utilization rate (HUR)

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Performance enhancement by threshold level control of a receiver in WDM-PON system with manchester coded downstream and NRZ upstream re-modulation

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IEICE TRANSACTIONS ON COMMUNICATIONS 2008年第9期E91B卷 2994-2997页

作者： Kim, Bong Kyu Chung, Hwan Seok Chang, Sun Hyok Park, Sangjo Seowon Univ Sch Comp Informat & Commun Chungcheongbuk Do South Korea

We propose and demonstrate a scheme enhancing the performance of optical access networks with manchester coded downstream and re-modulated NRZ coded upstream. It is achieved by threshold level control of a limiting amplifier at a receiver, and the minimum sensitivity of upstream is significantly improved for the re-modulation scheme with 5 Gb/s manchester coded downstream and 2.488 Gb/s NRZ upstream data rates.

关键词： access network fiber-to-the-home (FTTH) manchester code optical re-modulation passive optical network (PON) optical fiber communications

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