3GPP寬頻分碼多重進接上鏈之多工和通道編碼方法的探討與在數位訊號處理器上的實現

Abstract

寬頻分碼多重進接是最重要的第三代行動通訊系統之一。通道編碼(錯誤更正碼)是無線通訊中降低錯誤位元率的重要技術。多工則是在數據通訊中，連結各層的程序，並且對資料提供了另外的保護。在本篇論文中，我們模擬多工和通道編碼在淡化通道下的效能。此外，我們在Innovative Integration公司的Quatro6x數位訊號處理器板上實現3GPP寬頻分碼多重進接上鏈中的多工和通道編碼，並且建立了包含加密的子系統。 首先，我們先回顧行動通訊的歷史和發展。接著討論通道編碼的和多工的標準和技術。再來，我們介紹Qatro6x數位訊號處理器板，並說明和舉例關於FIFO和標準輸入輸出的使用。然後，我們分析多工和通道編碼的結果和效能，其中包含了迴旋碼和渦輪碼。還有在數位訊號處理器上實現即時的迴旋碼和多工。此外，在數位訊號處理板上建立了一個含有加密，通道編碼和多工的子系統。 我們達成了對於通道編碼和多工的即時處理。而我們未來的工作，應該要建立和訊源編碼的連結，同時完成一個更大的即時處理子系統。

3GPP WCDMA has become one of the most important third-generation (3G) cellular systems. Channel coding (error control coding) is the important technique in the wireless channel to reduce the bit error rate. Moreover, multiplexing is a procedure that connects each layer in data communications and also provides another protection to data. In this thesis, we simulate the multiplexing and channel coding through fading channels. In addition, we implement multiplexing and channel coding for 3GPP WCDMA uplink on Innovative Integration’s Qutra6x DSP board and build a link to encryption. First, we review the history and development of mobile communications. Then discuss the channel coding and multiplexing standards and techniques. Secondly, we introduce the Quatro6x DSP board, and give the descriptions and examples of FIFO and standard I/O usage. Thirdly, we analyze the result and performance of multiplexing and channel coding including both convolutional coding and turbo coding. Fourthly, the real-time convolutional coding and multiplexing is implemented in DSP. Moreover, build a subsystem containing encryption, channel coding and multiplexing in DSP board. We achieve the real-time processing of channel coding and multiplexing. For our future work, the link of our subsystem to source coding should be built and achieve a larger subsystem in real-time processing.