Apparatus and method for determining channel quality indicator (CQI) using beamforming in multi-antenna system
AssigneeSamsung Electronics Co., Ltd.
InventorsEun-Chul Yoon, Yun-Seok Choi
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Abstract
An apparatus and a method for determining a Channel Quality Indicator (CQI) using a beamforming in a multi-antenna system are provided. A transmitter for determining a CQI based at least partly upon the beamforming in the multi-antenna system includes a beam former for distinguishing frequency tone intervals having a constant channel across an entire frequency tone, forming a beam by multiplying frequency tones of the frequency tone interval having the constant channel by different beamforming weights, and transmitting a preamble signal. Hence, the users can be scheduled based at least partly upon the beamforming gain, and throughput can be enhanced through the practical MCS selection.
Claims21
A transmitter for determining a Channel Quality Information (CQI) based at least partly upon a beamforming in a multi-antenna system, the transmitter comprising:
- a beam former for distinguishing frequency tone intervals having a constant channel coefficient across an entire frequency tone, forming a beam by multiplying frequency tones of the frequency tone interval having the constant channel coefficient by different beamforming weights.
A receiver for determining a Channel Quality Indicator (CQI) based at least partly upon a beamforming in a multi-antenna system, comprising:
- a detector for estimating a channel vector by receiving a preamble signal beamformed by multiplying frequency tones of a frequency tone interval having a constant channel coefficient by different beamforming weights;
- and
- a CQI calculator for calculating channel powers in the frequency tones carrying the preamble signal, calculating an arithmetic average, and quantizing a product of the arithmetic average and a number of transmit antennas.
A method for determining a Channel Quality Indicator (CQI) based at least partly upon a beamforming in a multi-antenna system, the method comprising:
- distinguishing frequency tone intervals having a constant channel coefficient across an entire frequency tone;
- forming a beam by multiplying frequency tones of the frequency tone interval having the constant channel coefficient by different beamforming weights;
- and
- transmitting a preamble signal through the formed beam.
A method for determining a Channel Quality Indicator (CQI) based at least partly upon a beamforming in a multi-antenna system, the method comprising:
- estimating a channel vector by receiving a preamble signal beamformed by multiplying frequency tones of a frequency tone interval having a constant channel coefficient by different beamforming weights;
- and
- calculating channel powers in the frequency tones carrying the preamble signal, calculating an arithmetic average, and quantizing a product of the arithmetic average and a number of transmit antennas.
A transmitter for determining a Channel Quality Indicator (CQI) based at least partly upon in consideration of a beamforming in a multi-antenna system, the transmitter comprising:
- a beam former for identifying frequency tone intervals having a constant channel coefficient in across a whole an entire frequency tone, multiplying the frequency tones of the frequency tone intervals having the constant channel coefficient by different beamforming weights.
A receiver for determining a Channel Quality Indicator (CQI) based at least partly upon in consideration of a beamforming in a multi-antenna system, comprising:
- a detector for estimating a channel vector by receiving a preamble signal beam formed by multiplying frequency tones of a frequency tone interval having a constant channel coefficient by different beamforming weights;
- and
- a CQI calculator for calculating a Carrier-to-Interference-plus-Noise-Ratio (CINR) for the preamble signal.
Dependencies are inferred from the claim text.