Systems and methods for improving range for multicast...

Details Systems and methods for improving range for multicast... Systems and methods for improving range for multicast...

2004-05-27

2009-08-04

Urban, Edward (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Distortion, noise, or other interference prevention,...

C455S510000, C455S041200, C455S562100

Reexamination Certificate

active

07570921

ABSTRACT:
Methods to optimize range of multicast signal communication in wireless communication applications that use range-enhanced techniques for directed signal communication. A multicast signal may be sent multiple times through each of a plurality of independent omnidirectional transmit antennas of a communication device to a plurality of other communication devices to improve packet error rate (PER) at a given range (i.e., SNR). More generally, the multicast message can be transmitted up to N times using up to N times using any set of N complex linearly independent N-dimensional transmit weight vectors vi, . . . , vNassociated with N plurality of transmit antennas that meets the power constraint ∥vi∥2=1, i=0, . . . , N−1, where the vector vi, is used for the ith transmission of the multicast signal.

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