Multiplex communications – Communication over free space – Combining or distributing information via code word channels...
Reexamination Certificate
2005-04-26
2005-04-26
Vanderpuye, Kenneth (Department: 2661)
Multiplex communications
Communication over free space
Combining or distributing information via code word channels...
C370S210000, C370S335000, C370S441000, C375S147000
Reexamination Certificate
active
06885654
ABSTRACT:
A combined signal is received over a shared spectrum in a time slot in a time division duplex communication system using code division multiple access. Each data signal experiences a similar channel response. The similar channel response is estimated. A matrix representing a channel of the data signals based on in part the estimated channel response is constructed. A spread data vector is determined based on in part a fast fourier transform (FFT) decomposition of a circulant version of the channel matrix. The spread data vector is despread to recover data from the received combined signal.
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De Parthapratim
Pan Jung-Lin
Zeira Ariela
Blount Steven A
InterDigital Technology Corporation
Vanderpuye Kenneth
Volpe and Koenig P.C.
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