Apparatus and method for channel information feedback in wireless communication system
AssigneesSamsung Electronics Co., Ltd., Purdue Research Foundation
InventorsJun-Il Choi, David J. Love, Tae-Young Kim, Keon-Kook Lee
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Abstract
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A channel information feedback in a wireless communication system and a method of a receiving node of a wireless communication system are provided. The method includes transmitting an indication representing an indexing rule for channel values and block-wise quantized channel information, and receiving beamformed signals mapped to an antenna based on the indexing rule.
Claims16
A method for operating a receiving node in a wireless communication system, the method comprising:
- receiving a signal for estimating a channel;
- truncating estimated channel information and codewords in a codebook into groups of a plurality of channel vectors and groups of a plurality of codewords, respectively;
- trellis-code-quantizing the groups of the respective channel vectors based on the groups of the respective codewords;
- select channel information whose beamforming gain is larger among the trellis-code-quantized channel information;
- determining a domain corresponding to the selected channel information between a horizontal domain or a vertical domain for antenna elements;
- transmitting an indication representing the determined domain and the selected channel information;
- and
- receiving signals, wherein the signals are beamformed based on the indication and the selected channel information.
A method for operating a transmitting node in a wireless communication system, the method comprising:
- transmitting a signal for estimating a channel;
- receiving selected channel information whose beamforming gain is larger among trellis-code-quantized channel information and an indication representing a domain corresponding to the selected channel information between a horizontal domain or a vertical domain for antenna elements;
- and
- transmitting signals, wherein the signals are beamformed based on the indication and the channel information,
- wherein the trellis-code-quantized channel information is from groups of respective channel vectors based on groups of respective codewords, and
- wherein the groups of respective channel vectors and the groups of respective codewords are truncated from estimated channel information and codewords in a codebook, respectively.
An apparatus for a receiving node in a wireless communication system, the apparatus comprising:
- a transceiver;
- at least one processor coupled to the transceiver, and configured to:
- receive a signal for estimating a channel,
- truncate estimated channel information and codewords in a codebook into groups of a plurality of channel vectors and groups of a plurality of codewords, respectively,
- trellis-code-quantize the groups of the respective channel vectors based on the groups of the respective codewords,
- select channel information whose beamforming gain is larger among the trellis-code-quantized channel information,
- determine a domain corresponding to the selected channel information between a horizontal domain or a vertical domain for antenna elements, and
- transmit an indication representing the determined domain and the selected channel information, and
- receive signals,
- wherein the received signals are beamformed based on the indication and the selected channel information.
An apparatus for a transmitting node in a wireless communication system, the apparatus comprising:
- a transceiver;
- and
- at least one processor coupled to the transceiver, and configured to:
- transmit a signal for estimating a channel,
- receive selected channel information whose beamforming gain is larger among trellis-code-quantized channel information and an indication representing a domain corresponding to the selected channel information between a horizontal domain or a vertical domain for antenna elements, and
- transmit signals, wherein the signals are beamformed based on the indication and the channel information,
- wherein the trellis-code-quantized channel information is from groups of respective channel vectors based on groups of respective codewords, and
- wherein the groups of respective channel vectors and the groups of respective codewords are truncated from estimated channel information and codewords in a codebook, respectively.
Dependencies are inferred from the claim text.