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

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

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