Multi-user detection in CDMA communications system
US7327713B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 13, 2001 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | Oct 5, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/712
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
For each user in a multi-user detection arrangement in a CDMA communications system, a detector (80) provides a limiting function (88) responsive to a combined signal to produce a detection signal, having any of at least three possible values, for supply to a signal regenerator, regenerated signals being subtracted from a received signal in successive detection iterations of the multi-user detection arrangement. A code correlated signal is supplied via an inverse hyperbolic tangent function (84), or is multiplied by a multiplier inverse to an iteration index, to produce a derived signal. The derived signal is added (86) to a representation of a detection result stored from a previous iteration to produce the combined signal. The limiting function can comprise a hyperbolic tangent function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.