平行連結及串聯連結錯誤更正碼在多音頻干擾下之快速跳頻/MFSK通訊系統效能分析

Performance Analysis of Parallel and Serial Concatenated Error Correcting Coding in FFH/MFSK Systems under Multitone Jamming

張哲瑜(Che-Yu Chang)

指導教授 ： 劉玉蓀

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2013年)

https://doi.org/10.6841/NTUT.2013.00777

摘要

本篇論文主要探討在不同的快速跳頻/MFSK(Fast Frequency Hopping/Multiple Frequency Shift Keying, FFH/MFSK)通訊系統中，加入多音頻干擾後並經過通道，再結合不同的錯誤更正碼(Error Correcting Codes, ECC)比較效能。其中快速跳頻系統分為相鄰跳頻系統(contiguous-hopping system)與獨立跳頻系統(independent-hopping system)。於本系統中，所採取的通道為加成性白色高斯雜訊(Additional White Gaussian Noise, AWGN)和頻率選擇性雷利衰減通道。在錯誤更正碼上，設計出了串聯連結與平行連結不同方式的編、解碼。串聯連結使用位元交錯二位元碼串接符元碼-遞迴解碼；平行連結使用非二位元渦輪碼。另外比較符元交錯渦輪碼與位元交錯渦輪碼。由電腦模擬得知，非二位元渦輪碼在遞迴2次以上時，位元錯誤率優於位元交錯二位元碼串接符元碼-遞迴解碼與符元交錯渦輪碼。

關鍵字

快速跳頻 ； MFSK ； 多音頻干擾 ； 渦輪碼 ； 非二位元渦輪碼 ； 位元交錯二位元碼串接符元碼-遞迴解碼

並列摘要

This paper focuses on the different FFH/MFSK communication systems. After adding multitone jamming and passing through the channel, we compare the performance in different error correcting codes. Fast frequency hopping includes contiguous-hopping system and independent-hopping system. In this system, the channels we used are Additional White Gaussian Noise channel and Rayleigh selective fading channel. We design parallel and serial concatenated error correcting coding. In serial concatenated, we use bit interleaved binary code concatenated non-binary code. In parallel concatenated, we use non-binary turbo code. We also compare with bit-interleaved turbo code and symbol-interleaved turbo code. After the simulation, the bit error rate of non-binary turbo code which is interleaved more than two times is better than bit interleaved binary code concatenated non-binary code and symbol-interleaved turbo code.

並列關鍵字

fast frequency hopping ； MFSK ； multitone jamming ； turbo code ； non-binary turbo code ； bit interleaved binary code concatenated non-binary code

參考文獻

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[3] 何友順，快速跳頻展頻通訊系統於多音頻干擾下比較摺積碼和渦輪碼的效能，碩士論文，國立臺北科技大學電腦與通訊研究所，台北，2012。

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