Method and apparatus to balance maximum information rate with quality of service in a MIMO system
US7599443B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2004 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Mar 5, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a wireless MIMO communication system, for N symbols of a frame of information, allocating N1 symbols to a stronger eigen sub-channel and N2 symbols to a weaker eigen sub-channel, where N1>N2; determining a probability of reception error when transmitting the N2 symbols through the weaker eigen sub-channel for an auxiliary signal-to-noise ratio; solving for a quality of service QoS of the weaker eigen sub-channel and if the QoS is less than a desired QoS, decreasing the value of N and repeating allocating symbols, determining the probability of reception error and solving for the QoS. Another aspect includes asymmetrically allocating spreading codes to a stronger eigen sub-channel and to a weaker eigen sub-channel such that the stronger eigen sub-channel is allocated more spreading codes than the weaker eigen sub-channel; and transmitting all systematic bits of turbo coded information over the stronger eigen sub-channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.