scispace - formally typeset
Search or ask a question
Topic

Manchester code

About: Manchester code is a research topic. Over the lifetime, 629 publications have been published within this topic receiving 4320 citations. The topic is also known as: Manchester coding & Phase Encoding.


Papers
More filters
Patent
14 May 1998
TL;DR: In this article, an adaptive interface controller including a plurality of MII ports operable at either one and second transmission rates, a corresponding plurality of Manchester ports operability at the first transmission rate and an MII interface operation at the second transmission rate is presented.
Abstract: An adaptive interface controller including a plurality of MII ports operable at either one of the first and second transmission rates, a corresponding plurality of Manchester ports operable at the first transmission rate and an MII interface operable at the second transmission rate. The adaptive interface controller includes first select logic that provides data from an active one of the MII ports for one of the Manchester ports or to the MII interface depending upon the transmission rate. Manchester encoding logic is provided to receive data from the first select logic for an active port, to convert the data to Manchester format and to provide the encoded data to a corresponding one of the Manchester ports. Second select logic provides data transmitted to the MII interface for a selected one of the MII ports. Manchester decoding logic detects Manchester encoded data transmitted to any of the Manchester ports and converts the encoded data a serial to bit stream. Third select logic provides received data from either one of the Manchester decoding logic and the second logic to a corresponding one of the MII ports. The encoding and decoding logic are part of communication apparatus which includes respective FIFO memories that each include enough data bits deep to prevent data loss in spite of timing variations between different clock signals during transmission of data bits. Each FIFO also includes a valid bit for each data bit to identify the extents of transferred packets.

123 citations

Patent
11 Dec 1991
TL;DR: In this paper, the transponder responds to different RF signal strengths and commands from the transceiver to select whether it will store or transmit data, which is exchanged between the two devices using Manchester encoding.
Abstract: A system for indenitfying objects, such as workpieces on an assembly line, includes a transponder for attaching to an object and a radio frequency (RF) transceiver. The transceiver can program the transponder with data about the specific object and interrogate the transponder to obtain previously programmed data. The transponder responds to different RF signal strengths and commands from the transceiver to select whether it will store or transmit data. Data is exchanged between the two devices using Manchester encoding. The transceiver processes the encoded data signal from the transponder by measuring and storing the intervals between level transitions in the signal. The stored intervals are then processed in non-real time to recover the data.

102 citations

Proceedings ArticleDOI
01 Oct 2013
TL;DR: High-speed underwater optical wireless transmission over 2.5 m distance is experimentally proved, using different bit rates and modulation schemes, and in all the experimental conditions the authors achieve error free transmission.
Abstract: We experimentally prove high-speed underwater optical wireless transmission over 2.5 m distance, using different bit rates and modulation schemes. The system uses two low-cost Light Emitting Diodes (LEDs) arrays as optical transmitter and an avalanche photodiode module as receiver. The measurements are taken using an outdoor water tank having 3.3 m diameter, where two waterproof boxes containing the transmitter and the receiver are fixed underwater at the inner borders. We test 6.25 Mbit/s with Manchester coding, 12.5 Mbit/s with NRZ 8b/10b coding and 58 Mbit/s with Discrete Multitone modulation. Bit Error Rate measurements are collected over several hours under typical summer sunlight illumination conditions. In all the experimental conditions we achieve error free transmission.

94 citations

Patent
09 Nov 2001
TL;DR: In this paper, the authors present a network controller that directs communications with a variety of remote devices via a common bus and includes a clock for providing clock signals to both the transmitter and receiver.
Abstract: The present invention provides a network controller that directs communications with a variety of remote devices via a common bus. The network controller includes a transmitter for transmitting messages via the common bus, and a receiver for receiving messages from the common bus. Additionally, the network controller includes a clock for providing clock signals to both the transmitter and receiver. The transmitter and receiver are selected such that the network controller is capable of selectively operating in either synchronous or asynchronous mode. In operation, the network controller is configured in either a Manchester encoding or a Universal Asynchronous Receiver Transmitter (UART) protocol. The transmitter transmits messages comprising a command and an address of at least one remote device. In one embodiment, the transmitter simultaneously transmits messages to a plurality of remote devices in accordance with a group address comprised of a multiple bits with each bit associated with a respective group.

78 citations

Patent
Mel Bazes1
26 Mar 1990
TL;DR: An integrated circuit for recovering the clock and data information from phase-encoded serial data is presented in this paper, which includes a synchronous delay line coupled to a waveform digitizer and a wave-form synthesizer.
Abstract: An integrated circuit for recovering the clock and data information from phase-encoded serial data The circuit includes a synchronous delay line coupled to a waveform digitizer and a waveform synthesizer The waveform digitizer receives and converts the phase-encoded data into a string of bits whose value represent the logic levels of an encoded data at T p /N intervals where T p is the reference clock period and N is the resolution of the waveform digitizer The encoded data may be one of several phase-encoded serial data such as Manchester coding The digitized output from the waveform digitizer is input to a transition detector, where the locations of the transitions (bit-boundary transitions and bit-center transitions) of the digitized encoded data are extracted An AND stage comprising N AND gates is coupled to the waveform digitizer and the waveform synthesizer for masking out the bit-boundary transitions and passes the bit-center transitions The output from the AND stage (a binary word) is coupled to a pair of encoders The encoders are coupled to an adder and an L-type register which are used for compensating for missing bit-center transitions or for the presence of two bit-center transitions A digital filter coupled to the L-type register allows the present invention to achieve lockon immediately and to filter out phase jitter The digital filter is further coupled to a shifter in the waveform synthesizer for synthesizing the clock information of the encoded data on one hand, and for providing mask bits to the AND stage on the other hand The clock information of the encoded data is synthesized by the shifter in the waveform synthesizer over a digital-to-time domain converter in the waveform synthesizer Finally, the data information of the phase-encoded serial data is regenerated by a D-type flip flop which receives encoded data over a delayed stage from its D input and also receives the clock information over its clock input

74 citations

Network Information
Related Topics (5)
Optical fiber
167K papers, 1.8M citations
76% related
Transmission (telecommunications)
171.3K papers, 1.2M citations
74% related
Amplifier
163.9K papers, 1.3M citations
73% related
Integrated circuit
82.7K papers, 1M citations
72% related
CMOS
81.3K papers, 1.1M citations
72% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202110
202015
201921
201834
201726
201643