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Technology for next-generation digital terrestrial broadcasting — Field experiments of dual-polarized MIMO-OFDM transmission using LDPC codes

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5 Author(s)
Takuya Shitomi ; Sci. & Technol. Res. Labs., NHK (Japan Broadcasting Corp.), Tokyo, Japan ; Kenichi Murayama ; Makoto Taguchi ; Shingo Asakura
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We have developed a transmission system using ultra-multilevel orthogonal frequency division multiplexing (OFDM) technology, dual-polarized multiple-input multiple-output (MIMO) technology, and Low-Density Parity-Check (LDPC) Codes for experimental purposes on the basis of the conventional digital terrestrial broadcasting transmission scheme, ISDB-T. We conducted two field experiments: one at 23 reception points around NHK Science & Technology Research Laboratories (STRL) using an experimental transmitter installed at NHK STRL, and the other on the lawn at NHK STRL using circularly or skew polarized waves in addition to a conventional polarization set, horizontal and vertical. As a result, we obtained the required field strength in an urban environment when using the 4096QAM carrier modulation scheme with a LDPC code. Furthermore, we confirmed the advantage of circularly or skew polarized waves in an environment in which the received power differed between the horizontally and vertically polarized waves.

Published in:

IEEE international Symposium on Broadband Multimedia Systems and Broadcasting

Date of Conference:

27-29 June 2012