发明名称 |
Method and apparatus for pilot estimation using suboptimum expectation maximization |
摘要 |
A system is disclosed for use in a wireless communication system to provide an estimated pilot signal. The system includes a receiver and a front-end processing and despreading component in electronic communication with the receiver for despreading a CDMA signal. A pilot estimation component is in electronic communication with the front-end processing and despreading component for estimating an original pilot signal using a Kalman filter to produce a pilot estimate. A demodulation component is in electronic communication with the pilot estimation component and the front-end processing and despreading component for providing demodulated data symbols. The Kalman filter is configured by an offline system identification process that calculates parameters using a maximum likelihood parameter estimation and generates state estimates using the Kalman filter. The calculating and generating are iteratively performed to train the Kalman filter for real-time operation.
|
申请公布号 |
US2003227888(A1) |
申请公布日期 |
2003.12.11 |
申请号 |
US20020262306 |
申请日期 |
2002.09.30 |
申请人 |
ABRISHAMKAR FARROKH;BUTLER BRIAN;MOHSENI MOHAMMAD JAFAR;KREUTZ-DELGADO KENNETH |
发明人 |
ABRISHAMKAR FARROKH;BUTLER BRIAN;MOHSENI MOHAMMAD JAFAR;KREUTZ-DELGADO KENNETH |
分类号 |
H04B1/707;H04L25/03;(IPC1-7):H04B7/216;H04Q7/00 |
主分类号 |
H04B1/707 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|