I/Q mismatch compensation in an OFDM receiver in presence of...

Details I/Q mismatch compensation in an OFDM receiver in presence of... I/Q mismatch compensation in an OFDM receiver in presence of...

2003-02-18

2008-10-28

Phunkulh, Bob A (Department: 2619)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S210000, C375S260000

Reexamination Certificate

active

07443783

ABSTRACT:
A receiver for an orthogonal frequency division multiplex radio signal in which a carrier frequency is modulated by sub-carrier signals (S1) coded with data. Analogue signal processing means (3to12) produces base-band analogue signals (I-Rx, Q-Rx) in phase quadrature and analogue-to-digital converters (13, 14) convert the analogue signals to phase quadrature digital signals (xI(n), xq(n)). The digital signal processor includes the OFDM demodulator (15) and mismatch compensation (17, 18). The mismatch compensation (17, 18) combines each of the reproduced sub-carrier signals (RI) with a limited number of the reproduced sub-carrier signals (RI-Rk) according to respective frequency offset coefficient (I, k) that is a function of an estimated value of the offset (fc) of the reference frequency relative to the carrier frequency.

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PCT/EP03/01615 International Search Report.

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