Wireless transmission method for antenna arrays, having improved resistance to fading
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United States of America Patent
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Dec 4, 2001
Grant Date -
N/A
app pub date -
Aug 14, 1998
filing date -
Aug 14, 1998
priority date (Note) -
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Abstract
Disclosed is a modulation method for wireless signal transmission. Each message that is transmitted is made up of a sequence of signals, each selected from a constellation of L such signals, L a positive integer. Each transmitted signal is distributed spatially across a transmitting antenna array, and is also distributed in time. Thus, each signal may be represented as a T.times.M matrix, in which each of the M columns represents a distinct antenna of the array, and each of the T rows represents a distinct time interval. Each entry in this matrix represents a complex baseband voltage amplitude. Each of these signal matrices is proportional to a matrix having orthonormal columns.
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