適用於無線隨意網路之聯合波束成型基頻收發機設計

在醫院中，藉由即時監控病人的生命徵象，如血壓、心跳數和十二導程心電圖等，醫護人員能夠在異常狀況發生時，即時做出反應，而對於生命徵象數據的量測器材，病人有兩種選擇：傳統的量測器材透過實體訊號線將量測到之生命徵象數據傳回護理站作即時監控，但因體積和實體訊號線的關係，限制了病人的行動範圍，而可攜式量測器材雖然體積較為輕便，可讓病人隨身攜帶，自由行動，但此類產品通常不具備無線傳輸的功能而無法即時將量測到之生命徵象數據傳回護理站。針對此一現況，本論文提出一無線通訊系統架構以及對應之基頻收發機架構來即時傳輸可攜式量測器材所量測到之生命徵象數據，以兼顧病人對自由行動以及對生命徵象數據之即時監控的需求。此系統的設計理念為在合理的封包傳送延遲時間下，盡量提高傳送能量利用效率，以達到即時監控生命徵象數據之目的並增加通訊設備在網路中的可運行時間。因此，本系統採用無線網狀網路類型之網路拓樸型態，網路中的使用者節點以多重跳躍的方式來傳送資料，藉此降低傳送功率在傳送過程中的路徑損失，同時使用聯合波束成型技術來提高傳送能量之利用效率。此外，針對生命徵象資料產生速度緩慢但卻穩定的特性，本系統在實體層採用OFDMA技術，並搭配一些系統機制來降低生命徵象數據之傳輸延遲時間。而基頻收發機各模組則實現了系統所需之功能和機制，最後，本論文將所提出之無線通訊系統和基頻收發機應用於兩種不同的網路節點分佈型態，以觀察提出之系統和收發機架構之整體表現。

關鍵字

無線隨意網路；聯合波束成型；生命徵象監控；高能量利用效率；基頻收發機設計

並列摘要

In the hospital, by monitoring the vital signs of patients, such as blood pressure, heart rate and ECG, doctors and nurses can react as soon as possible when some abnormal vital signs occur. As to the vital sign measurement devices, there are two kinds of choice. Traditional devices measure the vital sign data and transmitted it back to the health care center via cable. However, due to the cable and the large volume of the measurement device, patients are confined in a certain area. In contrast, portable measurement devices allow patients to walk around freely, but usually not equipped with wireless transmission capability, failing to transmit vital sign data back to the health care center. Under this situation, a wireless communication system and corresponding baseband transceiver architecture are proposed to help portable measurement devices transmit the measured vital sign data back to the health care center. The design concept of this system is to provide an energy-efficient and low-transmission-latency data transmission service. Therefore, this system adopts the network topology of wireless mesh network where user nodes can transmit their data via multi-hop transmission, reducing the transmission power loss due to path loss. Besides, this system uses joint beamforming technique to enhance the energy efficiency. And due to the low but stable data rate characteristic, this system uses OFDMA technique and designs some system mechanisms to reduce the data transmission latency. On the other hand, the baseband transceiver realizes all the functions and mechanisms of this system. Finally, we apply this system and transceiver to two kinds of network scenario to verify its performance.

並列關鍵字

Wireless Ad Hoc Network ； Joint Beamforming ； Vital Sign Monitoring ； Energy-efficient ； Baseband Transceiver Design

參考文獻

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適用於無線隨意網路之聯合波束成型基頻收發機設計

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