| Turbo-Coded Modulation of EVRC Speech Encoder with Unequal Error Protection for Fading Channels |
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| 作者姓名： | 阿哈麦德 潘志文 高西奇 尤肖虎 |
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| 作者单位： | Dept.ofRadioEng.,SoutheastUniv.,Nanjing210096,China |
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| 基金项目： | National Natural Science Foundation ofChina( No.6972 5 0 0 1) |
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| 摘 要： | The Enhanced Variable Rate Codec (EVRC) is a standard for the Speech Service Opti6n 3 for Wideband Spread Spectrum Digital System, which has been employed in both IS-95 cellular systems and ANSI J-STC-008 PCS (Personal Communications Systems). This paper investigated the combination of turbo codes with Unequal Error Protection (UEP) and 16-QAM modulation for EVRC codec of Rate 1 to get power and bandwidth efficient coding scheme. The results show that the UEP system outperforms the Equal Error Protection (EEP) one by 1.45dB at BER of 10^-5.
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| 关 键 词： | 多媒体数字信号编解码器 数字系统 图象压缩 可变频率编解码器 出错防止 振幅调制 |
Turbo-Coded Modulation of EVRC Speech Encoder with Unequal Error Protection for Fading Channels |
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| Ahmed J. Jameel ,PAN Zhi-wen GAO Xi-qi,YOU Xiao-hu.Turbo-Coded Modulation of EVRC Speech Encoder with Unequal Error Protection for Fading Channels[J].Journal of Shanghai Jiaotong university,2003,8(2):150-156. |
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| Authors: | Ahmed J Jameel PAN Zhi-wen GAO Xi-qi YOU Xiao-hu |
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| Institution: | Dept. of Radio Eng., Southeast Univ., Nanjing 210096, China |
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| Abstract: | The Enhanced Variable Rate Codec (EVRC) is a standard for the Speech Service Option 3 for Wideband Spread Spectrum Digital System, which has been employed in both IS-95 cellular systems and ANSI J-STC-008 PCS (Personal Communications Systems). This paper investigated the combination of turbo codes with Unequal Error Protection (UEP) and 16-QAM modulation for EVRC codec of Rate 1 to get power and bandwidth efficient coding scheme. The results show that the UEP system outperforms the Equal Error Protection (EEP) one by 1.45 dB at BER of 10 -5. |
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| Keywords: | enhanced variable rate codec (EVRC) turbo codes unequal error protection (UEP) quadrature amplitude modulation (QAM) |
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