Multiplex communications – Communication over free space – Combining or distributing information via code word channels...
Reexamination Certificate
2005-04-12
2005-04-12
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
06879578
ABSTRACT:
A time division duplex using code division multiple access user equipment receives a plurality of data signals in a time slot. Each data signal experiences a similar channel response. The user equipment receives a combined signal over the shared spectrum in a time slot. The combined signal comprises the plurality of data signals. The combined signal is sampled at a multiple of a chip rate of the combined signal. The similar channel response is estimated. A channel response matrix or a channel correlation matrix is constructed based on in part the estimated channel response. A spread data vector is determined based on in part a fast fourier transform (FFT) decomposition of a circulant version of the channel response or channel correlation matrix. The spread data vector is despread to recover data from the matrix.
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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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