在干擾環境下多樣性結合應用於無線影像傳輸系統

A Study of Diversity Combining Schemes for Wireless Image Transmission System under Jamming Environment.

陳仕偉(Shih-Wei Chen)

指導教授 ： 鄭立德

中原大學/電機資訊學院/通訊工程碩士學位學程/碩士(2014年)

https://doi.org/10.6840/cycu201400814

摘要

在本論文，我們提出了一個無線影像在部分頻帶干擾的傳輸系統，因為減少傳輸過程所消耗的通訊資源，所以將傳輸影像進行壓縮後再做傳送。傳輸的通道是用部分頻帶干擾(Partial Band Noise Jamming，PBNJ)來做測試。為了抵抗傳輸過程中的干擾，我們使用了跳頻展頻系統(Frequency-Hopping，FH)來傳輸影像以及里德-所羅門碼(Reed-Solomon Code，RS Code)搭配非均等保護機制(Unequal Error Protect，UEP)來保護傳輸資料。因前端對傳輸資料所做的保護已趨近完備，所以我們在後端接收的部分使用了多樣性結合的技術來更為降低資料的失真度。在模擬結果的部分會比較兩種不同的壓縮演算法搭配不同的多樣性結合方式在不同傳輸環境下的影像接收品質。

關鍵字

多樣性結合 ； 部分頻帶干擾 ； 跳頻 ； 里德-所羅門碼 ； 非均等保護機制 ； 影像壓縮 ； 離散小波轉換

並列摘要

In this thesis, we propose a wireless image transmission system under partial band noise jamming (PBNJ). To increase the transmission efficiency, we adopt the compressed image to our system. In order to resist the interference for the transmission, we used frequency-hopping system (FH) to transmit data and combined it with Reed-Solomon code (RS Code) and unequal error protection (UEP) to enhance the data protection. Integrating diversity combining technique with compressed image, it is effective to reduce distortion of the received data. We consider two compression algorithms with different diversity combiners under additive white Gaussian noise (AWGN) and PBNJ. Simulation results showed the system enhances the performance with diversity combining techniques.

並列關鍵字

PBNJ ； FH ； diversity combining ； UEP ； RS code ； compressed image ； DWT

參考文獻

[3] M. B. Pursley and W. E. Stark, “Performance of Reed-Solomon coded frequency-hop spread-spectrum communications in partial-band inter-ference,” IEEE Trans. Commun., vol. COM-33, pp. 767-774, Aug. 1985.

[4] Yu. T. Su, Li-Der Jeng, “Anijam capability analysis of RS-coded slow frequency-hopped systems,” IEEE Trans. Commun., vol 48, No. 2. Feb.2000.

[5] Q. Zhang and T. Le-Ngoc, “Turbo product codes for FH-SS with partial-band interference,” IEEE Trans. Commun.,vol. 1, pp.513-520, July 2002.

[6] J. H. Kang and W. E. Stark, “Turbo codes for coherent FH-SS with partial band interference,” IEEE Trans. Commun., vol. 1, pp.5-9, Nov. 1996.

[7] J. H. Kang and W. E. Stark, “Turbo codes for noncoherent FH-SS with partial-band interference,” IEEE Trans. Commun., vol. 46, pp. 1451-1458, Nov. 1998.