| 量化AWGN信道的容量及最佳线性量化 |
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| 引用本文： | 郭文彬,杨鸿文,林锦东,庞沁华.量化AWGN信道的容量及最佳线性量化[J].北京邮电大学学报,2000,23(2):34-37. |
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| 作者姓名： | 郭文彬 杨鸿文 林锦东 庞沁华 |
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| 作者单位： | 北京邮电大学电信工程学院,北京 100876 |
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| 摘 要： | 分析了AWGN信道的输出被均匀量化后的信道容量,研究了基于信道容量最大化的最优量化问题. 结果表明量化比特数越多,为保持相同信道容量所需的信噪比则越少. 与无量化相比, 量化引起的信噪比损失一般在0～2 dB之间.一般采用最优量化时, 3 bit以上的量化造成的损失基本可以忽略不计. 给出了能使信道容量最大的最佳量化间隔的多项式拟合式.
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| 关 键 词： | 信道容量 量化 硬判决 软判决 |
| 收稿时间： | 1999-10-29 |
Capacity of Quantized AWGN Channel and Optimal Linear Quantization |
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| GUO Wen-bin,YANG Hong-wen,LIN Jin-dong,PANG Qin-hua.Capacity of Quantized AWGN Channel and Optimal Linear Quantization[J].Journal of Beijing University of Posts and Telecommunications,2000,23(2):34-37. |
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| Authors: | GUO Wen-bin YANG Hong-wen LIN Jin-dong PANG Qin-hua |
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| Affiliation: | School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876,China |
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| Abstract: | The channel capacity of quantized AWGN channel and optimal uniform quantization has been studied.Quantization will cause 0～2 dB loss of SNR depends on the quantizer bit number and the quantization step. The performance loss caused by 3 or more bits quantizer can be negligible. We have also found the polynomial to fit the optimal quantization step that can maximize the channel capacity. |
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| Keywords: | channel capacity quantization hard decision soft decision |
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