Design of an Energy-efficient Baseband Transceiver with Joint Beamforming for Wireless Ad Hoc Network
Date Issued
2011
Date
2011
Author(s)
Chuang, Fu-Kai
Abstract
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.
Subjects
Wireless Ad Hoc Network
Joint Beamforming
Vital Sign Monitoring
Energy-efficient
Baseband Transceiver Design
SDGs
Type
thesis
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