US 8,320,566 B2
METHOD AND APPARATUS FOR PERFORMING CONSTELLATION SCRAMBLING IN A MULTIMEDIA HOME NETWORKGeneral
US 8,320,566 B2
METHOD AND APPARATUS FOR PERFORMING CONSTELLATION SCRAMBLING IN A MULTIMEDIA HOME NETWORK
Tech Center:
2400 Networking, Multiplexing, Cable, and Security
Examiner:
Samson Lemma
Art Unit:
2432 Cryptography and Security
Inventors:
Arndt MUELLER
Assignee:
Priority:
10/15/09
Filed:
10/15/09
Granted:
11/27/12
Expiration:
10/23/29
Abstract
Systems and methods are provided that allow multiple transmitting network devices to transmit under an orthogonal frequency divisional multiple access (OFDMA) mode to a receiving network device. The multiple transmitting network devices may be configured to perform constellation scrambling on the symbols they will be transmitting using a predetermined scrambling sequence. They may be further configured to synchronize their use of the sequence, for example, by advancing the sequence for each available subcarrier, such that the receiving device may view the payload as if it were sent by a single transmitter. Accordingly, these multiple transmissions may be descrambled using only one instance of a sequence generator.
Cooperative Patent Classification (CPC)
H04H04L25/03866H04L