Method and system for generating channel quality indicator values for controlling a transmitter
US7197281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2004 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Sep 20, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1607
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for generating a channel quality indication (CQI) for a communication channel established between a transmitter and a receiver. A signal-to-interference ratio (SIR) estimate of the communication channel is calculated and a correction term is generated based on a data packet transmitted by the transmitter. A corrected SIR is generated by combining the SIR estimate and the first correction term. The corrected SIR is mapped to a CQI value. The CQI value is sent to the transmitter in order to adjust the configuration of the next data packet transmitted by the transmitter. The first correction term may be generated by subtracting a target packet error rate (PER) from a filtered binary signal derived from negative-acknowledgement (NACK) signals and acknowledgement (ACK) signals which respectfully indicate whether or not errors exist in data packets transmitted by the transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.