一種適用于帶內(nèi)同頻道數(shù)字音頻廣播的互補卷積碼的構(gòu)造方法研究
A Generation Method of Complementary Convolutional Codes for In-band On-channel Digital Audio Broadcasting
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摘要: 針對帶內(nèi)同頻道數(shù)字音頻廣播系統(tǒng)中存在的第一臨頻道干擾問題,該文提出了一種基于互補結(jié)構(gòu)的卷積編碼構(gòu)造方法。采用頻率分集聯(lián)合傳輸這種互補對卷積碼,能夠有效地克服信道干擾導(dǎo)致的傳輸數(shù)據(jù)破壞或丟失等問題。仿真結(jié)果和分析表明,與基于相同卷積碼對的編碼組合傳輸相比,互補卷積碼聯(lián)合傳輸可以得到1～2個dB的漸進(jìn)編碼增益。
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關(guān)鍵詞:
- 廣播; 第一鄰頻道干擾; 互補卷積碼; 漸近編碼增益
Abstract: This paper proposes a class of convolutional codes based on complementary structure to cancel the First-Adjacent Channel(FAC) interference in FM In-band On-channel Digital Audio Broadcasting(FM IBOC DAB) system. Those complementary convolutional codes, which are transmitted by frequency diversity scheme, can effectively deal with the problem in situations where the transmitted data may be lost or severely damaged. The simulation results and analysis show that complementary codes combining scheme yields a better result of 1-2 dB asymptotic code gain than identical codes combining scheme. -
于云華,劉揚,石寅.帶內(nèi)同頻道數(shù)字音頻廣播關(guān)鍵技術(shù)進(jìn)展[J].電子與信息學(xué)報.2003,25(11):1548-1557瀏覽[2]Kroeger B W, Peylal P J. Compatibility of FM hybrid In-Band On-Channel(IBOC) system for digital audio broadcasting[J].IEEE Trans. on Broadcasting.1997, 43(4):421-[3]Viterbi A J. Error bounds for convolutional codes and an asymptotically optimum decoding algorithm[J].IEEE Trans. on Info. Theory.1967, 13(2):260-[4]Cain J B, Clark G C, et al.. Punctured convolutional codes of rate (n- 1)/n and simplified maximum likelihood decoding. IEEE Trans. onInfo. Theory, 1979, IT-25(1): 97- 100.[5]Yasuda Y, Kashika K, et al.. High rate punctured convolutional codes for soft decision Viterbi decoding[J].IEEE Trans. on Comm.1984, 32(3):315-[6]Kallel S, Haccoun D. Generalized type Ⅱ hybrid ARQ scheme using punctured convolutional coding[J].IEEE Trans. on Comm.1990, 38(11):1938-[7]Kallel S. Complementary punctured convolutional codes and their applications[J].IEEE Trans. on Comm.1995, 43(6):2005-2009[8]Chen B, Sundberg C-E W. Optimal complement punctured convolutional codes for use in digital audio broadcasting and other applications. United States Patent, US006347122B1, Feb.12, 2002.[9]Hagenauer J. Rate-compatible punctured convolutional codes and their applications[J].IEEE Trans. on Comm.1988, 36(4):389-[10]Kroeger B W, Stehlik R R. Digital audio broadcasting using puncturable convolutional code. United States Patent,US006345377B2, Feb.5, 2002. -
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