應用於WiMAX系統之任意波束主動陣列天線

Adaptive Active Antenna Array for WiMAX System with Arbitrarily-Beam forming

黃騰毅(Teng-Yi Huang)

指導教授 ： 林信標

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2011年)

摘要

研究適用於Wimax系統的主動式天線陣列設計製作與實現，且OFDM功率放大器線性度要求嚴格。本研究論文採用預先式校正相位及控制功率輸出的設計方式，使各分路路徑之功率放大器在最佳線性度之條件下輸出功率，其效率表現明顯優於傳統功率合成技術法。
模擬與實際結合，提出系統架構方塊及電路構裝實現。運用相移器、數位衰減器、濾波器、功率放大器、功率分配器、實際設計、製作、量測四路收發單元。針對模組量測各分路元件參數。
校正應用與理論結合，在軟體的控制法則上，採用快速的查表法實現各分路數位校正，再由校正過後的主動天線陣列產生波束、波束合成演算法組合成位於空間上的波束方向、自由旋轉。藉由主動式波束掃瞄陣列天線高增益及高方向性之優點，選擇適當的空間波束傳送、接收訊號、提升整體系統效能。提供一個可真正實踐應用於WiMAX系統2.5GHz的主動天線陣列系統。

關鍵字

主動式天線陣列 ； 預先式校正 ； 波束合成

並列摘要

This thesis discussed the design and implementation of active adaptive antenna array for WiMAX systems which use Orthogonal frequency-division multiplexing (OFDM) modulation method and require Peak-to-Average Power Ratio reduction and high level linearity of power amplifier (PA). The subject of thesis focus on pre-correction phase error and controlling PA output power for each output path with perfect linearity output power of PA. In this way, the performance is better than traditional combined power method.
The system architecture functions are simulated and compared with the result of the circuit experiment. The developed active adaptive array antenna system includes phase shifters, digital programming attenuators, functional filters, power amplifiers, and power dividers. Before combination each subsystem, every subsystem functional specifications, such as S-parameter, gain, and phase error, are validated.
A parameter table is adopted for fast calibration in each path. After error-correction, the active array antennas generate beams and combine beams using synthesize algorithm in free space. The proposed system uses the active array antennas with benefit of high gain and flexible feasibility in direction finding which promotes efficiency communication system especially in WiMAX system.

並列關鍵字

Antenna Array ； Adaptive Active Antenna Array

參考文獻

[31] 謝益豪，應用於無線通訊產品之印刷式倒F型天線陣列切換系統實作與效能分析，碩士論文，台北科技大學， 電通所， 2005

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