Reduction of peak-to-average power ratio in a mobile...

H - Electricity – 04 – L

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H04L 27/20 (2006.01) H04L 7/04 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2366591

For one embodiment, a Random Access Channel (RACH) preamble modulation method and apparatus are disclosed in which the real (I) and imaginary (Q) components of a complex RACH preamble (b(k)) are filtered in corresponding pulse shaping filters (206, 208). Consequently, the phase transitions in the resulting signal are limited at all chip positions, and the resulting quadriphase codes produce transmitted signals with lower Peak-to-Average Power Ratios (PAPRs) than those that result using conventional Hybrid Phase-Shift Keying (HPSK) modulation schemes. On the other side, the resulting quadriphase synchronization code retains the same aperiodic autocorrelation magnitude as the original binary code (a(k)), optimized to produce the minimum probability of incorrect synchronization.

Dans une première réalisation, l'invention se rapporte à un procédé et à un appareil de modulation du préambule d'un canal d'accès aléatoire (RACH random access channel) selon lesquels les composantes réelle (I) et imaginaire (Q) d'un préambule RACH complexe (b(k)) sont filtrées dans des filtres correspondants de mise en forme des impulsions (206, 208). Les transitions de phase dans le signal résultant sont de ce fait limitées, au niveau de toutes les positions de bribes, et les codes quadriphase résultants produisent des signaux émis associés à des rapports puissance de crête/puissance moyenne (PAPR peak-to-average power ratio) inférieurs à ceux qui sont obtenus par des techniques de modulation par déplacement de phase hybride (HPSK hybrid phase-shift keying). Par ailleurs, le code de synchronisation quadriphase résultant conserve la même amplitude d'autocorrélation apériodique que le code binaire original (a(k)), et il est optimisé de façon à produire la probabilité minimale de synchronisation incorrecte.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Reduction of peak-to-average power ratio in a mobile... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reduction of peak-to-average power ratio in a mobile..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction of peak-to-average power ratio in a mobile... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1775069

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.