Robust Frequency Offset Estimation in OFDM Systems

Robust Frequency Offset Estimation in OFDM Systems

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In this chapter, 16-ary QAM symbols are referred to as frequency domain symbols and their N-point IFFT is referred to as an OFDM symbol. Our results indicate that combining iterative frequency offset estimation with iterative demodulation and decoding reduces the bit error rate with respect to the SNR. Weighting the reconstructed samples using (19) prevents error propagation when a large number of the decoded bits and reconstructed symbols are in error.

Inspec keywords: error statistics; iterative decoding; quadrature amplitude modulation; inverse transforms; frequency estimation; OFDM modulation

Other keywords: N-point IFFT; iterative demodulation; iterative frequency offset estimation; error propagation; 16-ary QAM symbols; OFDM systems; bit error rate; frequency domain symbols; SNR; iterative decoding; robust frequency offset estimation

Subjects: Integral transforms in numerical analysis; Other topics in statistics; Codes; Interpolation and function approximation (numerical analysis)

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