发明名称 |
Encoding method in transmission of plurality of oversampled data channels, and apparatus for carrying out the method. |
摘要 |
An encoding method in transmitting a plurality of parallel, independent and asynchronous data channels, each of which after encoding into serial from is to be supplied to an optical transmitter before transmission over a fibre-optic cable. The parallel data channels (D1-D4) are over-sampled, i.e. they are sampled several times per time slot and are time multiplexed in a series of frames (R1,R2,R3,...) the channels in one frame (R1) being retained with their true values (D1-D4) and in the successive frame (R2) being given their inverted values (D1-D4). In addition there are inserted fixed synchronizing bits (F1,F2) and a bit (T1) which alternates between a logical 0 and a logical 1, depending on whether the true or inverted values of the data channels occur in the frames. A parallel-series converter for carrying out the encoding method is described.
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申请公布号 |
EP0286609(A1) |
申请公布日期 |
1988.10.12 |
申请号 |
EP19880850063 |
申请日期 |
1988.02.23 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON |
发明人 |
FORSBERG, STEFAN GUNNAR;ERKANDER, RAGNAR STIG |
分类号 |
H04J3/06;H04L1/08;H04L7/04;H04L25/49;(IPC1-7):H04J3/00 |
主分类号 |
H04J3/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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