Title :
Differential spatial modulated OFDM in underwater acoustic communications
Author :
Zhi Li ; Xiang Cheng ; Miaowen Wen ; Liuqing Yang ; Bingli Jiao
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Peking Univ., Beijing, China
Abstract :
Underwater acoustic (UWA) communication channel features relatively fast time variation. Spatial modulation (SM) combined with orthogonal frequency division multiplexing (OFDM) transmission can be applied to UWA communications. Channel estimation may induce a performance penalty for SM since only one transmit antenna is activated to carry pilots. Recently, a differential solution has been proposed for SM, which dispenses with channel estimation and restricts the signal-to-noise (SNR) loss to a relatively low level under quasi-static channel conditions. Hence, the application of differential SM (DSM) to OFDM UWA communications is of particular interest. Simulation results show that when applied to UWA communications, DSM has an obvious performance enhancement in bit error rate (BER) over SM.
Keywords :
OFDM modulation; channel estimation; error statistics; underwater acoustic communication; BER; SNR loss; UWA communication channel; bit error rate; channel estimation; differential SM; differential solution; differential spatial modulated OFDM; orthogonal frequency division multiplexing transmission; quasistatic channel condition; signal-to-noise loss; time variation; transmit antenna; underwater acoustic communication; Bit error rate; Channel estimation; OFDM; Receiving antennas; Signal to noise ratio; Transmitting antennas; Vectors; Underwater acoustic (UWA) communications; differential spatial modulation (DSM); orthogonal frequency division multiplexing (OFDM);
Conference_Titel :
Signal Processing, Communications and Computing (ICSPCC), 2014 IEEE International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4799-5272-4
DOI :
10.1109/ICSPCC.2014.6986330
