Sparse channel estimation for orthogonal frequency division...

Details Sparse channel estimation for orthogonal frequency division... Sparse channel estimation for orthogonal frequency division...

2007-06-12

2007-06-12

Pham, Chi (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S328000, C375S346000

Reexamination Certificate

active

09852376

ABSTRACT:
A computationally efficient channel estimation technique for use within an orthogonal frequency division multiplexing (OFDM) communication system determines coefficients of a channel transfer function by calculating the dot products of a pilot vector and a plurality of interpolation vectors. One dot product is preferably calculated for each subcarrier of interest within the system. The pilot vector is extracted from an OFDM symbol received from a communication channel. In a preferred approach, a number of interpolation vectors are precalculated and stored within a communication device for subsequent use during channel estimation and equalization operations. The technique is highly flexible and can be implemented using, for example, a variable user block size or a variable pilot vector size.

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