Spread spectrum diversity transmitter/receiver
US6556617B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1999 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Sep 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A spread spectrum diversity transmitter/receiver, in which a bit error rate is improved even at a severe multi path fading channel, is provided. At a transmitting section, a multi dimensional transmitting signal by code division is used not only for diversity itself but also for a convolutional encoding among diversity branches by a convolutional encoder. With this, an error correction function can be installed. At a receiving section, a Viterbi decoding is performed before a majority judgment is performed, a bit error at the front stage of a majority judging circuit is suppressed and the likelihood of the majority judgment is increased and consequently the bit error rate is largely improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.