发明名称 |
A METHOD AND SYSTEM FOR JOINT TIME-OF-ARRIVAL AND AMPLITUDE ESTIMATION BASED ON A SUPER-RESOLUTION TECHNIQUE |
摘要 |
<p>In a geolocation application, a method is provided to jointly estimate the time-of-arrival (TOA) and the amplitude of a received signal based on super-resolution technique. The super-resolution joint TOA-amplitude estimators are provided based on either the expectation-maximization (EM), parallel-interference-cancellation space-alternating generalized expectation maximization (PIC-SAGE) or serial-interference-cancellation SAGE (SIC-SAGE). The SIC-SAGE estimator minimizes the ranging estimation error especially under a non-line-of-sight (NLOS) condition. The SIC-SAGE estimator is a simplified version of the maximum likelihood estimator with more stable performance in a multipath rich environment, such as the ultra-wideband (UWB) based applications. These techniques provide the following benefits: 1) it is generic, so that signal processing can be deployed on both time-domain (e.g., UWB impulse-radio) and frequency-domain (e.g., multi-band orthogonal frequency-division multiplexing (MB-OFDM)) based transceiver schemes and applicable for both UWB and non-UWB systems; 2) it is robust especially under NLOS condition and multipath rich environment.</p> |
申请公布号 |
WO2008156909(A2) |
申请公布日期 |
2008.12.24 |
申请号 |
WO2008US60999 |
申请日期 |
2008.04.21 |
申请人 |
NTT DOCOMO INC.;CHONG, CHIA-CHIN;WATANABE, FUJIO;INAMURA, HIROSHI |
发明人 |
CHONG, CHIA-CHIN;WATANABE, FUJIO;INAMURA, HIROSHI |
分类号 |
H04L27/28 |
主分类号 |
H04L27/28 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|