Method for single stream beamforming with mixed power constraints
AssigneeCeleno Communications Ltd.
InventorsYaron Shany, Nir Shapira
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Abstract
System and method for calculating a transmitter beamforming vector related to a channel vector h under per-antenna power constraints combined with total power constraint, under per-antenna power constraints combined with overall line of site (LOS) effective isotropic radiated power (EIRP) and under all three constraints. Calculating a transmitter beamforming vector may be done in the transmitter, in the receiver and feedback to the transmitter or in both. The method may be adapted to perform with a multi-antenna receiver and with multi-carrier systems.
Claims22
A method for calculating a transmitter beamforming vector related to a channel vector h under per-antenna power constraints combined with total power constraint, the method comprising:
- assigning full power to antennas pertaining to a subset S;
- and
- calculating maximum ratio combining (MRC) beamforming vector related to a sub-channel vector excluding said subset S, with a maximum allowed power constraint equal to the total power constraint minus power of said subset,
- wherein the transmitter beamforming vector b(h;P,p) amplitude is composed from square root of the per-antenna power constrains for said subset S and said MRC beamforming vector on remaining components.
Dependencies are inferred from the claim text.