Optical communications – Multiplex – Code division multiplexing
Reexamination Certificate
2007-10-23
2007-10-23
Tran, Dzung (Department: 2613)
Optical communications
Multiplex
Code division multiplexing
C398S078000, C398S099000
Reexamination Certificate
active
11201235
ABSTRACT:
A transmitter and transceiver for an optical communication channel may include a data encoder, a partial response (PR) precoder, a pulse filter, and an electrical-to-optical converter to transmit a spread pulse signal over an optical communication channel. The data encoder to encode the transmit data into coded data. The precoder to correlate bits of the coded data together into a precoded signal at the output of the precoder. The pulse filter to spread out the pulses in the precoded signal into a spread-pulse signal at the output of the pulse-shaping filter. The electrical-to-optical converter to convert an electrical spread-pulse signal into light pulses at its optical output. A transceiver may further include an optical-to-electrical converter, an automatic gain controller, a matched filter, a PR finite impulse response equalizing filter, a maximum likelihood sequence estimation detector, and a data decoder in order to decode and recover the data.
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Elahmadi Salam
Elahmadi Siraj Nour
Blakely Sokoloff Taylor & Zafman LLC
Menara Networks
Tran Dzung
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