Noise tolerant receiver for wideband optical transmission system

Details Noise tolerant receiver for wideband optical transmission system Noise tolerant receiver for wideband optical transmission system

1995-11-28

1998-06-02

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359161, 359194, H04B 1010, H04B 1006

Patent

active

057609420

ABSTRACT:
Reduction of lower frequency interfering signals including signals from fluorescent light systems can be achieved by an optical receiving system, before the detection process, by differentiating the signal and then using a modified detection process to detect the differentiated signal. At least one data channel is included in the optical receiving system, each data channel including an optical receiving transducer which receives optical transmissions from an optical transmitter positioned a distance away from the optical receiving system. From the transducer, the received signal is differentiated and amplified to remove unwanted interfering signals from the received signal before it is transmitted to a detector. The detector converts the differentiated and amplified signal into an output data stream which corresponds to the signal originally presented to the optical transmitter.

REFERENCES:
patent: 4229831 (1980-10-01), Lacher
patent: 4531239 (1985-07-01), Usui
patent: 4646361 (1987-02-01), Usui
patent: 4648135 (1987-03-01), Labrum
patent: 4679251 (1987-07-01), Chown
patent: 4792998 (1988-12-01), Toussaint
Richard C. Allen, "Wireless LAN Medium Access Control (MAC) and Physical Specifications", IEEE Document #P802.11, 93/20; Mar. 1993.

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