Certains contenus de cette application ne sont pas disponibles pour le moment.
Si cette situation persiste, veuillez nous contacter àObservations et contact
1. (WO2017002010) PROCÉDÉ DE BALISAGE ESPACE-TEMPS POUR SYSTÈMES DE COMMUNICATIONS SANS FIL
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS:

1. A transmitter for a wireless communications system for implementing space-time labelling diversity for uncoded conventional modulation, the transmitter including:

a first bit mapper;

a second bit mapper which is different to the first bit mapper;

a first transmitter;

a second transmitter; and

a processor connected to the first and second mappers and the first and second transmitters, the processor controlling these to:

receive two bit streams and simultaneously feed these into the first mapper and the second mapper, wherein the first mapper maps these into first and second mapped bit streams and the second mapper maps these into third and fourth mapped bit streams which are different from the first and second mapper bit streams;

transmit the first mapped bit stream in a first time slot via the first transmitter;

transmit the second mapped bit stream in the first time slot via the second transmitter;

transmit the third mapped bit stream in a second time slot via the second transmitter; and

transmit the fourth mapped bit stream in a second time slot via the first transmitter.

A transmitter according to claim 1 wherein the first mapper maps the bit streams based on a conventional mapping constellation and the second mapper maps the bit streams based on placing adjacent neighbor symbols as far as possible within the constellation.

A transmitter according to claim 1 or claim 2 wherein the first and second transmitters receive baseband signals and converts these up to passband signals for transmission.