Single user detection circuit

Details Single user detection circuit Single user detection circuit

2006-05-30

2006-05-30

Patel, Ajit (Department: 2661)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S210000, C370S335000, C370S441000, C375S147000

Reexamination Certificate

active

07054300

ABSTRACT:
A circuit for use in a receiver receives a plurality of code division multiple access data signals simultaneously. Each data signal experiences a similar channel response. The circuit 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 in part on the estimated channel response. A spread data vector is determined based in part on a fast Fourier transform (FFT) decomposition of a circulant version of the channel response matrix or channel correlation matrix. The spread data vector is despread to recover data from the matrix.

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