Precoding with reduced feedback for coordinated multipoint...

Details Precoding with reduced feedback for coordinated multipoint... Precoding with reduced feedback for coordinated multipoint...

2009-09-24

2011-12-13

Moe, Aung S (Department: 2474)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S252000, C370S329000, C375S260000

Reexamination Certificate

active

08077664

ABSTRACT:
Techniques for reducing the number of bits needed to specify the best precoding vector for each mobile station in a wireless communication network that employs multi-point transmission are disclosed. An exemplary method begins with the estimation of path loss between a mobile station and each of a plurality of geographically separated transmitter sites, each transmitter site having at least one transmitter antenna. Based on the estimated path losses, one of a plurality of pre-determined subsets (codebooks) of a pre-determined set of antenna precoding vectors is selected. A group index identifying the selected subset is then transmitted to the mobile station. Subsequently, a vector index is received from the mobile station, the vector index corresponding to a precoding vector in the selected subset, and data is transmitted to the mobile station, using the precoding vector applied to the transmitter antennas at the plurality of transmitter sites.

REFERENCES:
patent: 2007/0191066 (2007-08-01), Khojastepour et al.
patent: 2009/0257356 (2009-10-01), Frederiksen et al.
patent: 2010/0027456 (2010-02-01), Onggosanusi et al.
patent: 2010/0098012 (2010-04-01), Bala et al.
patent: 2010/0104033 (2010-04-01), Gorokhov
patent: 2010/0118989 (2010-05-01), Sayana et al.
patent: 2010/0118997 (2010-05-01), Lee et al.
patent: 2010/0166097 (2010-07-01), Zhou et al.
patent: 2010/0172340 (2010-07-01), Muharemovic et al.
patent: 2011/0086654 (2011-04-01), Larsson
patent: 1914 947 (2008-04-01), None
patent: WO 2008/065462 (2008-06-01), None

Affiliated with

Also associated with

Rating

Precoding with reduced feedback for coordinated multipoint... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Precoding with reduced feedback for coordinated multipoint..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precoding with reduced feedback for coordinated multipoint... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4253539