Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2006-12-26
2006-12-26
Smith, Creighton (Department: 2645)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S300000, C455S108000
Reexamination Certificate
active
07154959
ABSTRACT:
The invention includes a MIMO channel emulator that includes a channel emulator matrix. The channel emulator matrix receives N inputs and generating M outputs. The channel emulator matrix includes a plurality of splitters. Each splitter receives at least one of the N inputs, and each splitter generates a plurality of signal paths. The channel emulator matrix further includes at least one phase shifter. Each phase shifter adjustably shifts a phase of at least one signal path. The channel emulator matrix further includes a plurality of combiners. Each combiner receives more than one of the plurality of signal paths. At least one of the combiners receives a phase adjusted signal path, and each combiner generates at least one of the M outputs. The invention can also include a plurality of fading emulators. Each fading emulator receives at least one emulator input. The plurality of emulators generate the N splitter inputs. The fading emulators can include fading delay lines. The fading emulators can be adjusted so that each of the M outputs are not fully correlated with each of the other M outputs. The invention can also include a plurality of second splitters. Each second splitter receives at least one channel input signal. Each second splitter generates a plurality of second signal. This embodiment further includes at least one second phase shifter. Each second phase shifter adjustably shifts a phase of at least one second signal. This embodiment further includes a plurality of second combiners. Each second combiner receives more than one of the plurality of second signal paths. At least one second combiner receives a phase adjusted second signal path. Each second combiner generates at least one of the fading emulator inputs.
REFERENCES:
patent: 6236363 (2001-05-01), Robbins et al.
patent: 2004/0184559 (2004-09-01), Ballantyne
Baum Daniel
Erceg Vinko
Paulraj Arogyaswami J.
Shtrom Victor
Intel Corporation
Proksch Michael A.
Smith Creighton
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