Title:
DATA TRANSMISSION SYSTEMS WITH DC BALANCED CODE
Document Type and Number:
WIPO Patent Application WO2005107199
Kind Code:
A3
Abstract:
In a data transmission system, binary data is transmitted by transmitting alternate high and low pulses of defined durations wherein: a first binary data bit is encoded by a high or low pulse having a first defined duration; and wherein a second binary data bit is encoded by a high or low pulse having either a second defined duration or a third defined duration wherein the selection of the duration of pulse encoding a particular second data bit is determined as is necessary to maintain a substantially constant mean signal level in a transmitted data stream. In an alternative implementation, transmitted data is encoded as bit pairs, each bit pair comprises a sequence of high and low pulses, each pulse in each bit pair having a defined duration wherein each bit pair has an equal mean signal level. The data transmission method may be applied to low cost, low data rate systems such as building control systems, security access systems and stock control systems.
Inventors:
WOLLESWINKEL RICK (NL)
Application Number:
PCT/IB2005/001156
Publication Date:
March 02, 2006
Filing Date:
April 29, 2005
Export Citation:
Assignee:
MELEXIS NV (BE)
WOLLESWINKEL RICK (NL)
WOLLESWINKEL RICK (NL)
International Classes:
H03M5/08; H04L25/49; (IPC1-7): H03M5/08; H04L25/49
Foreign References:
| US6671316B1 | 2003-12-30 |
Other References:
GORRY FAIRHURST: "Manchester Encoding", 1 September 2001 (2001-09-01), XP002348542, Retrieved from the Internet [retrieved on 20051011]
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