| 講演概要 ： |
Positioning a mobile station (MS) with a wireless communication system in a non-line-of-sight (NLOS) environment, which is sometimes called ”NLOS geolocation” for short, has become an important issue with the rapid development of mobile communications in recent years. Here we present a unified analysis for NLOS geolocation, where major techniques, i.e., the time of arrival (TOA), time difference of arrival (TDOA), angle of arrival (AOA) and signal strength (SS) based schemes are investigated in a coherent manner. From the viewpoint of estimation theory, we intend to answer two basic questions of this subject: what is the best achievable positioning accuracy; and how to achieve it? We shall focus on the analysis of the simplest case, TOA positioning in a (LOS or NLOS) single-path environment, to outline a typical framework of the analysis. The elements of parameter estimation of estimation theory and matrix manipulation are two main tools in our discussion. However, we shall emphasize on the physical and intuitive interpretation of the development. No prior knowledge on those subjects or complicated details will be involved. |
NTTドコモワイヤレス研究所電波信号処理研究室に滞在中のプリンストン大学ポスドクのYihong Qiさんが当モバイル通信研究室を訪問された機会に，モバイル通信の電波伝搬特性と位置検出に関する講演をして頂きました．当研究室のみでなく香川大学からも参加があり，15名が出席して，活発な質疑応答が行なわれました．詳細は以下の通りです．
