Title :
Performance Analysis of Hybrid Carrier System with MMSE Equalization over Doubly-Dispersive Channels
Author :
Wang, Kun ; Sha, Xuejun ; Mei, Lin ; Qiu, Xin
Author_Institution :
Harbin Inst. of Technol., Harbin, China
fDate :
7/1/2012 12:00:00 AM
Abstract :
A hybrid carrier (HC) system employing a frequency domain linear equalization based on minimum mean square error (MMSE) criterion is analyzed in this letter. The analytical studies prove that HC modulation scheme achieves a trade-off between circularly prefixed orthogonal frequency division multiplexing (OFDM) and single-carrier (SC) systems in terms of resisting doubly-selective fading. By dispersing the aggregated residual interference effectively, the HC system with particular modulation orders outperform OFDM and SC systems within a specific signal noise ratio (SNR) interval. Both analysis and simulation results over a typical double selective fading channel verify the superiority of HC modulation in suppressing residual interferences.
Keywords :
OFDM modulation; equalisers; fading channels; interference suppression; least mean squares methods; HC modulation scheme; MMSE criterion; MMSE equalization; SC systems; SNR interval; circularly OFDM systems; circularly prefixed orthogonal frequency division multiplexing systems; double selective fading channel; doubly-dispersive channels; frequency domain linear equalization; hybrid carrier system; minimum mean square error criterion; modulation orders; residual interference suppression; signal noise ratio interval; single-carrier systems; Bit error rate; Frequency domain analysis; Interference; Modulation; OFDM; Signal to noise ratio; Hybrid carrier (HC); doubly-selective fading; frequency domain linear equalization; minimum mean square error (MMSE);
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.050112.120414
