Spread spectrum code-division-multiple-access (SS-CDMA) lightwave communication system
February 28, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3605018 Spread spectrum communication system Processor for multiple, continuous, spread spectrum signals Laser secure communications system Spread spectrum code tracking loop Simultaneous integral multi-access transmission system on transmission lines by optical fibres Code sequence synchronization system for spread spectrum communication receiver Orthogonal CDMA system utilizing direct sequence pseudo noise codes Optical communication system Non-orthogonal mobile subscriber multiple access system Patent #: 4470138 InventorsApplicationNo. 06/834346 filed on 02/28/1986US Classes:370/441, Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)398/183, Having particular modulation398/75, Time and wavelength division398/77Code division multiplexingExaminersPrimary: Orsino, Joseph A.Attorney, Agent or FirmInternational ClassesH04J 14/00 (20060101)H04L 12/407 (20060101) H04J 14/02 (20060101) AbstractThe present invention relates to a lightwave communication system, and associated transmitters (13) and receivers (14), which uses both spread spectrum, code-division-multiple-access (SS-CDMA), and wavelength-division-multiplexing (WDM) techniques for 2-way transmissions over a lightwave waveguide arrangement (11) to use the overall spectrum of the waveguide arrangement (11) while providing sufficient interference rejection of randomly spaced carriers, and associated signals, which may drift into the bandwidth of transmissions of other transmitter/receiver pairs due to instabilities in carrier laser sources (20). Techniques are also disclosed for a transceiver (10i) acquiring a 2-way link with another transceiver (10j), while other transmitter/receiver pairs are concurrently communicating using WDM, SS-CDMA, signal transmissions. For example, a calling transceiver transmits a narrowband information message (40) on a random carrier which is detected by a called transceiver by scanning the frequency spectrum. The called transceiver then returns a narrowband answer signal (41) on another random carrier which is detected by the calling transceiver. In this manner, each transceiver locks onto the carrier of the other transceiver and the appropriate pseudo-noise (PN) code sequence can then be determined and synchronized before WDM, SS-CDMA, 2-way transmissions begin.Other References
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