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1. (KR1020080027362) ESTIMATING BIT ERROR PROBABILITY (BEP) IN AN EDGE WIRELESS SYSTEM

Office : Republic of Korea
Application Number: 1020087001655 Application Date: 21.01.2008
Publication Number: 1020080027362 Publication Date: 26.03.2008
Publication Kind : A
IPC:
H04L 1/00
H04L 1/20
H04L 27/00
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
20
using signal-quality detector
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27
Modulated-carrier systems
CPC:
H04L 1/206
H04L 1/0003
H04L 1/0009
H04L 1/0026
H04L 1/203
Applicants: QUALCOMM INCORPORATED
Inventors: GHOSH KAUSHIK
Priority Data: 2005 165297 22.06.2005 US
Title: (EN) ESTIMATING BIT ERROR PROBABILITY (BEP) IN AN EDGE WIRELESS SYSTEM
Abstract: front page image
(EN) Distribution parameter mapping determines the bit error probability (BEP) of a burst transmitted from a base station to the mobile station using a modulation and coding scheme (MCS) specified in the EDGE standard. Depending on whether the multi-bit soft decisions of the burst most resemble a Gaussian or a Rician distribution, the statistical parametersμandσor A andσare determined. The ratioμ/σor A/σis mapped to an empirically determined BEP in a Gaussian or Rician lookup table, respectively. The BEPs are not influenced by the degree of code redundancy in the MCS. The BEPs for the four bursts in a radio block are then averaged, filtered and quantized according to the EDGE standard. The quantization level of the average BEP is reported to the base station so that subsequent radio blocks can be transmitted using an MCS that is appropriate for the estimated BEP. ©KIPO&WIPO 2008
Also published as:
EP2182668EP1908204JP2008547327US20060291591CN101238675IN19/MUMNP/2008
WO/2007/002417