Title :
Hybrid Carrier Modulation with Time-Domain Windows and Iterative Equalization over Underwater Acoustic Channels
Author :
Kun Wang ; Xuejun Sha ; Yong Li
Author_Institution :
Sch. of Electron. & Inf. Eng., Harbin Inst. of Technol., Harbin, China
Abstract :
In this letter, we consider an hybrid carrier modulation (HCM) scheme based on weighted-type fractional Fourier transform (WFRFT) for communications over underwater acoustic channels (UAC). Time domain windowing and a frequency domain iterative MMSE equalization (FD-IMSE) are employed in the HCM-underwater-acoustic system. Numerical results manifest that the HCM outperforms both the multi-carrier modulation and the single carrier modulation in terms of bit-error-ratio over UAC, though with an acceptable increase in computation burden.
Keywords :
Fourier transforms; error statistics; iterative methods; least mean squares methods; modulation; time-frequency analysis; underwater acoustic communication; FD-IMSE; HCM scheme; HCM-underwater-acoustic system; UAC; WFRFT; bit-error-ratio; frequency domain iterative MMSE equalization; hybrid carrier modulation scheme; iterative equalization; multicarrier modulation; single carrier modulation; time domain windowing; time-domain window; underwater acoustic channel; weighted-type fractional Fourier transform; Bit error rate; Delays; Doppler effect; Frequency-domain analysis; Modulation; Time-domain analysis; Underwater acoustics; Hybrid carrier modulation (HCM); underwater acoustic channel (UAC); weighted-type fractional Fourier transform (WFRFT);
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.070913.130744
