標題: | Reliable OFDM Receiver With Ultra-Low Resolution ADC |
作者: | Wang, Hanging Shih, Wan-Ting Wen, Chao-Kai Jin, Shi 電控工程研究所 Institute of Electrical and Control Engineering |
關鍵字: | Low-precision ADC;OFDM;turbo signal recovery;prototyping system |
公開日期: | 1-五月-2019 |
摘要: | The use of low-resolution analog-to-digital converters can significantly reduce power consumption and hardware cost. However, their resulting severe nonlinear distortion makes achieving reliable data transmission challenging. For orthogonal frequency division multiplexing (OFDM) transmission, the orthogonality among subcarriers is destroyed. This invalidates conventional OFDM receivers relying heavily on this orthogonality. In this paper, we move on to quantized OFDM (Q-OFDM) prototyping implementation based on our previous achievement in optimal Q-OFDM detection. First, we propose a novel Q-OFDM channel estimator by extending the generalized Turbo (GTurbo) framework formerly applied for optimal detection. Specifically, we integrate a type of robust linear OFDM channel estimator into the original GTurbo framework, and derive its corresponding extrinsic information to guarantee its convergence. We also propose feasible schemes for automatic gain control, noise power estimation, and synchronization. Combined with the proposed inference algorithms, we develop an efficient Q-OFDM receiver architecture. Furthermore, we construct a proof-of-concept prototyping system and conduct over-the-air (OTA) experiments to examine its feasibility and reliability. This is the first work that focuses on both algorithm design and system implementation in the field of low-resolution quantization communication. The results of the numerical simulation and OTA experiment demonstrate that reliable data transmission can be achieved. |
URI: | http://dx.doi.org/10.1109/TCOMM.2019.2894629 http://hdl.handle.net/11536/151898 |
ISSN: | 0090-6778 |
DOI: | 10.1109/TCOMM.2019.2894629 |
期刊: | IEEE TRANSACTIONS ON COMMUNICATIONS |
Volume: | 67 |
Issue: | 5 |
起始頁: | 3566 |
結束頁: | 3579 |
顯示於類別: | 期刊論文 |