Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1995-08-09
1999-05-25
Bacares, Rafael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359149, 359172, 455 383, 379 59, 379379, H04B 1000
Patent
active
059074183
ABSTRACT:
An infrared channel includes an IR transmitter circuit (302) and an IR receiver circuit (304). The transmitter circuit encodes data packets (400) which include a precursor segment, a synchronization segment, and a data field, the data field including data words, which words are bytes of data encoded by adding ones complement data bits and interleaving data subfields. The data fields are for infrared emission by the light source. A receiver circuit processor (316 or 508) is coupled to input samples to detect the presence of a precursor during a predetermined time period, and sleeping for a time interval, between inputting samples, which is substantially longer than the predetermined time period. The transmitter circuit transmits the precursor for a period of time at least as long as the sleep interval.
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Alameh Rachid
Rader Sheila M.
Walczak Thomas J.
Bacares Rafael
Motorola Inc.
Vaas Randall S.
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