Title:
バイアスの影響を低減させたSIRを判定するための方法および装置
Document Type and Number:
Japanese Patent JP4068097
Kind Code:
B2
Abstract:
A signal-to-interference ratio (SIR) estimator for estimating a SIR of baseband signals which are received and processed by a data demodulator to provide demodulated signals to the SIR estimator. The SIR estimator receives the demodulated symbols from the data demodulator and estimates the average signal power of the demodulated symbols as a function of a median based average power value md and a mean based average power value me of the demodulated symbols for each quadrant of a quadrature phase shift keying (QPSK) constellation. The function is used to determine a minimum value m between md and me. The SIR estimator estimates the average effective interference power of the demodulated symbols and calculates the SIR by dividing the estimated average signal power of the demodulated symbols by the estimated average effective interference power of the demodulated symbols.
Inventors:
Shin Sung-Hyuk
Ariella Zeira
Ariella Zeira
Application Number:
JP2004551783A
Publication Date:
March 26, 2008
Filing Date:
November 05, 2003
Export Citation:
Assignee:
Interdigital Technology Corporation
International Classes:
G06F19/00; H04B1/10; H04B1/707; H04B1/7097; H04B7/005; H04B7/26; H04B15/00; H04B17/00; H04L27/22; H04L27/38; H04L29/02; H04B
Domestic Patent References:
| JP2002152128A | ||||
| JP10190497A | ||||
| JP2002152147A |
Foreign References:
| WO2001020832A1 |
Other References:
Q. T. Zhang,‘Bridging the gap between dynamic and static methods for cell planning’,Vehicular Technology, IEEE Transactions on ,2001年 9月,pp. 1224-1230
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe