On channel estimation in OFDM systems
On channel estimation in OFDM systems
The use of multi-amplitude signaling schemes in wireless OFDM systems requires the tracking of the fading radio channel. The paper addresses channel estimation based on time-domain channel statistics. Using a general model for a slowly fading channel, the authors present the MMSE and LS estimators and a method for modifications compromising between complexity and performance. The symbol error rate for a 18-QAM system is presented by means of simulation results. Depending upon estimator complexity, up to 4 dB in SNR can be gained over the LS estimator.
- Lund University Sweden
- Luleå University of Technology Sweden
- Purdue University West Lafayette United States
- University of Technology Russian Federation
Signal Processing, Signalbehandling, Electrical Engineering, Electronic Engineering, Information Engineering
Signal Processing, Signalbehandling, Electrical Engineering, Electronic Engineering, Information Engineering
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