符合成本效益無線通訊收發機架構之設計與分析

Abstract

近幾年來無線通訊著重於可靠度傳輸與高傳輸速率的收發機研究，然而隨著各種無線通訊需求的增加，新型的規格也不斷的產生，在有限的資源下如何有效的使用成本將成為重要的議題。本研究針對符合成本效益無線通訊收發機架構，從高可靠度與高傳輸速率兩個面向探討，在高可靠度部分以展頻通訊收發機為主，考量在收發機層面，提出一種強健的同步演算法能夠抵抗高取樣頻率誤差以及高載波頻率誤差。考量系統層面，在展頻通訊收發機中設計在線射頻自我量測模組，此模組具備監測自我射頻品質，使得每次通訊傳輸更有效率。在高傳輸速率方面，以多輸入多輸出正交分頻多工系統來探討，在演算法層面，討論載波頻率偏差同步模組與可適性通道估測模組如何在運算複雜度與效能之間找到平衡，最後在設計架構層面，探討具有重組性的中央運算器收發機架構，提出重組方法使得可適性通道估測模組於此架構中完成演算法運算，以達到符合設計成本的概念。

In recent years, wireless communication is mainly required for high reliable and high data-rate transceivers. However, the new specifications of wireless communication is increased for many applications. Considering the resource limitation, cost-efficiency is an important issue. In high reliable and high data-rate aspects, this dissertation designs and analyzes a cost-efficient wireless modem and its architecture. This work adopts DSSS modem for high reliable aspects. In the baseband level, a robust synchronization is proposed against the high SCO and high CFO. In the system level, online RF self-measurement is designed in the DSSS modem for monitoring the RF quality. It would be increasing the transmission efficiency. This work uses MIMO-OFDM modem for high data-rate aspects. In the algorithm level, the adaptive channel estimator joint CFO calibrator tradeoff the complexity and the performance. Reducing the design cycle in architecture level, analyze and reconfigure the SIMD-ALU based MIMO-OFDM modem for an adaptive channel estimator.