Patent ID: 6535666
Filing Date: 2003-03-18
Classification: G01S,G06K,H04B,H04L

Abstract:
Communication apparatus for transmitting and receiving signals over a waveguide using different propagation modes in spectrally-overlapping frequency bands, the apparatus comprising:a waveguide serving as a signal transmission medium; a plurality of signal couplers for injecting modulated signals onto the waveguide in different electromagnetic propagation modes that are spectrally-overlapping; a plurality of signal probes forming a probe array at one or more places in the waveguide separated from the signal couplers, such that the original propagation modes are subject to scrambling and distortion as a result of physical irregularities in the transmission medium; and a recovery system coupled to the signal probes, to effect recovery and separation of the signals received at the signal probes, using cumulant computations based on cumulants of the fourth or higher even order.