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Performance Analysis of Hybrid Carrier System with MMSE Equalization over Doubly-Dispersive Channels

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4 Author(s)
Kun Wang ; Harbin Inst. of Technol., Harbin, China ; Xuejun Sha ; Lin Mei ; Xin Qiu

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.

Published in:

Communications Letters, IEEE  (Volume:16 ,  Issue: 7 )