Correlation method for channel estimation for OFDM

Details Correlation method for channel estimation for OFDM Correlation method for channel estimation for OFDM

2003-01-15

2010-11-02

Mills, Donald L (Department: 2462)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S330000, C370S478000

Reexamination Certificate

active

07826342

ABSTRACT:
The present invention concerns a method for estimating the time-dispersion of a channel comprising D subchannels, wherein one computes from a received signal a set of estimated Channel Transfer Factors (CTF's) Ĥ[ν], where ν(0≦ν≦D) is the subchannel number, said method comprising a step of calculating, for a predetermined strictly positive integer d, a correlation factor Cdrepresenting the correlations, both in amplitude and in phase, between pairs Ĥ[ν] and Ĥ[ν+d] of said computed CTF estimates. By an appropriate choice of d, the time-dispersion resolution can be adapted to most prevalent channels. The correlation is optionally corrected according to the mean channel estimation signal-to-noise ratio. This method can be used for many applications where knowing the time-dispersion characteristics of a channel is required, and is, for example, particularly suitable for designing a channel estimation filter, and for link adaptation. Application to devices and apparatus implementing these methods.

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