RECEIVER APPARATUS FOR RECEIVING A MULTICARRIER SIGNAL
First Claim
1. Receiver apparatus for receiving a multicarrier signal comprising subcarriers, wherein symbols are modulated onto the subcarriers, which receiver apparatus comprises an estimation unit for estimating a subcarrier-dependent channel frequency response and for determining an intercarrier interference spreading on the basis of a cyclic shift in said symbols, an equalizer unit for at least approximately canceling an intercarrier interference included in said multicarrier signal received on the basis of at least said channel frequency response estimated and said intercarrier interference spreading determined.
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Abstract
In time varying OFDM systems, the effect of a non-ideal time synchronization may lead to a poor performance in terms of decoded average bit error rate versus the signal-to-noise ratio. The receiver apparatus (3) of the transmission system (1) estimates a subcarrier-dependent channel frequency response and determines an intercarrier interference spreading on the basis of a cyclic shift in symbols carried by the subcarriers. Therewith, an intercarrier interference included in an OFDM signal can be canceled, even in case of a non-ideal time synchronization.
33 Citations
8 Claims
- 1. Receiver apparatus for receiving a multicarrier signal comprising subcarriers, wherein symbols are modulated onto the subcarriers, which receiver apparatus comprises an estimation unit for estimating a subcarrier-dependent channel frequency response and for determining an intercarrier interference spreading on the basis of a cyclic shift in said symbols, an equalizer unit for at least approximately canceling an intercarrier interference included in said multicarrier signal received on the basis of at least said channel frequency response estimated and said intercarrier interference spreading determined.
Specification