Robustness against the effects of multipath in an ISDB-T LDM broadcast system using diversity at reception
This paper presents the ISDB-T LDM system, with the Core Layer fully compatible with the traditional ISDB-T and the Enhanced Layer using the Non-Uniform Constellation 64-QNUC, in order to improve spectral efficiency, performance, robustness and useful bit rate, so that it is possible to use it for UHDTV applications. In order to reach these goals, in addition to the LDM technique, the LDPC encoder/decoder concatenated with the BCH were used. The SDR/GRC implementation was used and the reception diversity was achieved by the use of the MRC method. To prove its efficiency, some tests were performed using the proposed system in environments with AWGN and multipath channels.
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