相互干擾下之藍牙與無線區域網路共同偵測器之設計

Design of a Joint Detector for Bluetooth and Wireless LAN under Mutual Interference

金芷安(Chih-An Chin)

指導教授 ： 闕志達

國立臺灣大學/電機資訊學院/電子工程學研究所/碩士(2011年)

https://doi.org/10.6342/NTU.2011.01754

摘要

以現今通訊發展，無線區域網路與藍牙系統為目前兩大最常使用的無線通訊網路標準。由於兩系統之應用跟需求不同，皆具不可取代性，所以都被廣泛使用於各種電子產品中。
然而無線區域網路IEEE 802.11g與藍牙兩者操縱頻寬都是位於2.4 GHz的ISM頻帶，當兩系統在同一時間使用相同頻帶負載訊號時，必然會發生互相干擾的問題，造成傳輸錯誤，此為兩系統ISM頻帶的共存問題。本論文根據共同偵測器之概念，提出了一個可適用大部分情形下無線區域網路Wi-Fi與藍牙訊號重疊時共同偵測之架構，降低彼此干擾影響，進而提供更好的無線傳輸品質與服務。架構中包括共同偵測器演算法、以及在兩者相互干擾下，如何測得其各種通道資訊。例如藍牙信號強度、相位角偏移量、無線區域網路符元時序偵測、通道估測等。最後本研究針對無線區域網路跟藍牙相互干擾下的實際共存系統中，經通道估測的模擬環境做共同偵測器之效能驗證。

關鍵字

無線區域網路 ； IEEE 802.11g ； 藍牙 ； ISM共存系統 ； 干擾消除 ； 共同偵測器

並列摘要

In today’s communication technology, wireless local area network (Wireless LAN) and Bluetooth are two most used standards in the wireless communication network. Because the requirement and application of the two systems are different and irreplaceable, both of two sysyems are widely used in variety of electronic device. However, Wireless LAN and Bluetooth both utilize 2.4 GHz ISM band, mutual interference occurs while the two systems modulate signals to the same spectrum at the same time, and this will cause transmission error. This is so-called the ISM coexistence issue. According to the idea of joint deteion, the thesis propursed a “Joint Detector” structure, this can solve most situation of the Wireless LAN and Blutooth interfefence, and serve a better transmission service and quality. This structure includes algorithm, CSI estimation under interference. For example, like Bluetooth signal amplitude, phase, Wireless LAN symbol boundary, channel, etc. In the final this research would verify the simulation result of Joint detector.

並列關鍵字

Wireless LAN, ； IEEE802.11g ； Bluetooth ； ISM Coexistence ； Interference Cancellation ； Joint Detector

參考文獻

[1] IEEE 802.11, IEEE Standard for Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, Nov. 1999.

[3] Alexandra Duel-Hallen, Hans Hallen, and Tung-Sheng Yang, “Long Range Prediction and Reduced Feedback for Mobile Radio Adaptive OFDM Systems”, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 5, NO. 10,Oct. 2006.

[4] Xiaolin Hou, Shubo Li, Changchuan Yin, “Two-Dimensional Recursive Least Square Adaptive Channel Estimation for OFDM Systems”, Proceeding on Wireless Communications, Networking and Mobile Computing, IEEE 2005.

[10] C. F. Chiasserini and R. R. Rao, “A comparison between collaborative and non-collaborative coexistence mechanisms for interference mitigation in ISM bands,” in Proc. of IEEE Conf. on Vehicular Technology, Rhodes, Greece, May 2001, pp. 2187-2191.

[11] Y.-K. Kwok, and M.C.-H. Chek, “Design and evaluation of coexistence mechanisms for Bluetooth and IEEE 802.11b systems,” in Proc. of the 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Barcelona, Spain, Sept. 2004, pp. 1767-1771.