Mobile teletext reception using signal processing in frequency domain

Abstract

An experimental study of mobile teletext reception is described. Teletext in Japan is a broadband signal with 5.73 Mb/s; therefore, multipath interference is a serious problem in mobile reception, and it is impossible to obtain the teletext correctly by conventional methods. A multipath reduction technique using signal processing in the frequency domain is developed. In this technique, an original chirp signal is used for reference to identify radio propagation paths. In field trials, the delay profile is precisely obtained, and the bit error rate can be reduced. the error correction capability is also tested in a computer simulation. The proposed method was found to improve the error rate when the signal-to-noise ratio was greater than 20 dB.<>