發(fā)布時(shí)間：2018-10-09 16:44

【摘要】：與傳統(tǒng)通信技術(shù)相比,自適應(yīng)傳輸技術(shù)能動態(tài)匹配信道條件,具有較高頻譜利用率。特別是以無速率碼為核心的自適應(yīng)傳輸技術(shù)因其優(yōu)良性能正受到越來越多的關(guān)注。在該類自適應(yīng)系統(tǒng)中,位于接收端的無速率解碼器主要完成無速率碼解碼工作,是自適應(yīng)系統(tǒng)的核心設(shè)備,其工作性能好壞直接影響自適應(yīng)系統(tǒng)的穩(wěn)定性及吞吐率。本課題研究并設(shè)計(jì)該無速率解碼器的驅(qū)動程序,以滿足自適應(yīng)通信系統(tǒng)的高吞吐率需求。本文首先介紹了無速率解碼器的工作原理,并分析了其工作特點(diǎn);然后,提出了三層的驅(qū)動程序結(jié)構(gòu):底層驅(qū)動接口層、高速DMA傳輸層以及上層解碼控制層,其中,底層驅(qū)動接口層是基于WinDriver實(shí)現(xiàn)的用戶態(tài)驅(qū)動程序,用于提供設(shè)備與主機(jī)的基礎(chǔ)通信接口;高速DMA傳輸層實(shí)現(xiàn)高速DMA傳輸通道,用于提供主機(jī)與解碼設(shè)備的高速通信鏈路;上層解碼控制層實(shí)現(xiàn)解碼器中各個(gè)解碼核心的調(diào)度與控制,并進(jìn)行故障檢測與恢復(fù)。本文設(shè)計(jì)的驅(qū)動程序基于WinDriver開發(fā),其全部運(yùn)行于用戶態(tài);該驅(qū)動程序使用輪詢方式響應(yīng)外設(shè),充分保證了解碼器工作的高實(shí)時(shí)性,保證了系統(tǒng)300Mbps吞吐率。經(jīng)測試,該驅(qū)動在自適應(yīng)系統(tǒng)中運(yùn)行良好。
[Abstract]:Compared with the traditional communication technology, the adaptive transmission technology can dynamically match the channel conditions and has a higher spectral efficiency. Especially, the adaptive transmission technology based on rate-free code is attracting more and more attention because of its excellent performance. In this kind of adaptive system, the rate free decoder at the receiving end is the core equipment of the adaptive system, and its performance directly affects the stability and throughput of the adaptive system. In order to meet the high throughput requirement of the adaptive communication system, the driver of the rate free decoder is studied and designed in this paper. This paper first introduces the working principle of the rateless decoder and analyzes its working characteristics, and then proposes a three-layer driver structure: the bottom driver interface layer, the high-speed DMA transmission layer and the upper layer decoding control layer, among which, the following three layers are proposed: the bottom driver interface layer, the high speed DMA transmission layer and the upper layer decoding control layer. The bottom driver interface layer is a user-mode driver based on WinDriver, which is used to provide the basic communication interface between the device and the host, and the high-speed DMA transport layer realizes the high-speed DMA transmission channel, which is used to provide the high-speed communication link between the host and the decoding device. The upper decoding control layer realizes the scheduling and control of each decoding core in the decoder, and performs fault detection and recovery. The driver designed in this paper is based on WinDriver and all of it runs in user state. The driver responds to peripheral devices in polling mode, which fully ensures the high real-time performance of the decoder and the 300Mbps throughput of the system. The test results show that the drive works well in the adaptive system.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN764;TP311.1

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