Systems and methods for radio frequency calibration exploiting channel reciprocity in distributed input distributed output wireless communications
US-12166546-B2 · Dec 10, 2024 · US
US8964889B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8964889-B2 |
| Application number | US-201213658757-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 23, 2012 |
| Priority date | Apr 27, 2009 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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A device and method for precoding vectors in a communication system is provided. A transmitter may precode a data vector using information regarding a communication channel prior to transmitting the data vector. The transmitter may precode the data vector in a manner that reduces an energy value of a resulting transmit data vector so as to minimize interference in a received signal at a receiver. The transmitter may perturb entries of the data vector one-by-one in an iterative fashion until a minimum in an energy value of the transmit data vector is obtained.
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What is claimed is: 1. A method in communication comprising: determining, by a precoder, a transmit vector x using an information symbol vector u, comprising perturbing the information symbol vector u one entry at a time until an energy value of the transmit vector x does not decrease as a result of the perturbing; and in response to the energy value of the transmit vector x not decreasing as a result of the perturbing, transmitting, by the precoder, the transmit vector x.…
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