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1. WO2014126761 - CALIBRATION OF A DOWNLINK TRANSMIT PATH OF A BASE STATION

Publication Number WO/2014/126761
Publication Date 21.08.2014
International Application No. PCT/US2014/014837
International Filing Date 05.02.2014
Chapter 2 Demand Filed 11.12.2014
IPC
H04L 1/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
H04B 17/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
17Monitoring; Testing
H04L 1/20 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
20using signal-quality detector
H04L 1/24 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
24Testing correct operation
H04L 1/06 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
02by diversity reception
06using space diversity
H04L 1/18 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
12by using return channel
16in which the return channel carries supervisory signals, e.g. repetition request signals
18Automatic repetition systems, e.g. van Duuren system
CPC
H04B 17/11
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
17Monitoring; Testing
10of transmitters
11for calibration
H04B 17/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
17Monitoring; Testing
10of transmitters
11for calibration
12of transmit antennas, e.g. of the amplitude or phase
H04B 17/14
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
17Monitoring; Testing
10of transmitters
11for calibration
14of the whole transmission and reception path, e.g. self-test loop-back
H04B 17/24
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
17Monitoring; Testing
20of receivers
24with feedback of measurements to the transmitter
H04B 7/0417
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
0413MIMO systems
0417Feedback systems
H04L 1/0026
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
0023characterised by the signalling
0026Transmission of channel quality indication
Applicants
  • QUALCOMM INCORPORATED [US]/[US]
Inventors
  • GOTMAN, Maxim
Agents
  • DRAPKIN, Michael, L.
  • SCHRAMM, Paul, M.
Priority Data
14/172,67004.02.2014US
61/764,16913.02.2013US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) CALIBRATION OF A DOWNLINK TRANSMIT PATH OF A BASE STATION
(FR) ÉTALONNAGE D'UN CHEMIN DE TRANSMISSION EN LIAISON DESCENDANTE D'UNE STATION DE BASE
Abstract
(EN) Methods, systems, and devices are described for calibrating a transmit path of a base station. A calibration symbol of a subframe may be generated for transmission on a downlink channel. The calibration symbol of the subframe may be transmitted. The calibration symbol may include a predefined waveform to calibrate the transmit path of the base station. At least part of the subframe including the calibration symbol may be received through a dedicated feedback receive path. The transmit path may be calibrated based at least in part on the received calibration symbol. The calibration symbols may replace one or more data symbols of the subframe. Control symbols may also be transmitted during the subframe. The control symbols may include reference signals and downlink control channels. The control symbols may signal to a mobile device a zero allocation of downlink resources during the subframe.
(FR) L'invention concerne des procédés, des systèmes et des dispositifs pour étalonner un chemin de transmission de station de base. Un symbole d'étalonnage de sous-trame peut être généré pour une transmission sur un canal de liaison descendante. Le symbole d'étalonnage de la sous-trame peut être transmis, et comprendre une forme d'onde prédéfinie pour étalonner le chemin de transmission de la station de base. Au moins une partie de la sous-trame comprenant le symbole d'étalonnage peut être reçue via un chemin de réception de rétroaction dédié. Le chemin de transmission peut être étalonné en fonction au moins partiellement du symbole d'étalonnage reçu. Les symboles d'étalonnage peuvent remplacer un ou plusieurs symbole(s) de données de la sous-trame. Des symboles de commande peuvent également être transmis dans la sous-trame, comprendre de signaux de référence et des canaux de commande de liaison descendante et signaler à un dispositif mobile une affectation nulle de ressources de liaison descendante dans la sous-trame.
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