Experimental study of incoming waves separating adaptive array for ISDB-T mobile reception

Abstract

In terrestrial digital TV broadcasting in Japan, OFDM is utilized as a modulation scheme. However, the communication quality could be seriously deteriorated at the high speed mobile reception (Ex. vehicle). Furthermore, most of the mobile reception system, 4 antennas are mounted on a vehicle (Front: 2 antennas, Rear: 2 antennas).The authors proposed a new combing method (Incoming waves separating system by adaptive array antenna). In this paper, the performances in case of 4 directional antennas are evaluated. Furthermore the performance in more complicated environment is evaluated. From experimental results, it is clarified that the BER performances of the proposed system are superior to the conventional system.

Adaptive Beamforming Applied to OFDM Systems

“…In the works presented in [ 25 , 26 ], the MMSEbeamforming algorithm for the pre-FFT OFDM system was applied to a channel assumed to be frequency selective fading. However, the scheme needs the channel estimation to calculate the parameters of the spatial filter.…”