| BCH信道编码对降低快跳频OCDMA系统中色度色散的影响 |
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| 引用本文： | 吉建华,范戈. BCH信道编码对降低快跳频OCDMA系统中色度色散的影响[J]. 光子学报, 2002, 31(12): 1475-1478 |
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| 作者姓名： | 吉建华 范戈 |
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| 作者单位： | 上海交通大学,区域光纤通信网与新型光通信系统国家重点实验室,上海,200030 |
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| 摘 要： | 提出BCH信道编码的方案来降低色度色散对降低快跳频OCDMA系统性能的影响.采用BCH信道编码后,单重合码的长度将变短,即可以用较少的波长数来构造码字,因此降低了色度色散的影响.分析结果表明,在相同的信息比特速率、脉元间隔、资用波长数的情况下,BCH信道编码能显著改善FFH-OCDMA系统的误码率性能.同时,由于单重合码的长度将变短,大大降低了光纤光栅的制作难度.由于BCH信道编码在电域中实现,其硬件技术已相当成熟,所以对整个BCH/FFH-OCDMA系统的代价影响不大.
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| 关 键 词： | 快跳频光码分多址 色度色散 单重合码 BCH码 |
| 收稿时间： | 2002-04-01 |
REDUCTION OF THE IMPACT OF CHROMATIC DISPERSION IN OPTICAL FAST FREQUENCY-HOPPING CDMA NETWORKS USING BCH CHANNEL CODING |
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| Abstract. REDUCTION OF THE IMPACT OF CHROMATIC DISPERSION IN OPTICAL FAST FREQUENCY-HOPPING CDMA NETWORKS USING BCH CHANNEL CODING[J]. Acta Photonica Sinica, 2002, 31(12): 1475-1478 |
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| Authors: | Abstract |
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| Affiliation: | National Laboratory on Local Fiber Optic Communication &; Advanced Optical Communication Systems, Shanghai Jiaotong University, Shanghai 200030 |
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| Abstract: | The BCH channel coding scheme is proposed to reduce the impact of chromatic dispersion on optical fast frequency hopping CDMA(FFH OCDMA) networks.Analysis results shown that,the performance of BCH/FFH OCDMA is much better under the same bit rate,same chip time and same number of available wavelengths.Another advantage for BCH/FFH OCDMA is that the code length of one coincidence sequence will be shorter,which can greatly reduce the difficulty of fabrication for fiber gratings |
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| Keywords: | Optical fast frequency hopping CDMA(FFH OCDMA) Chromatic dispersion One coincidence sequence BCH code |
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