FIELD: information technologies.
SUBSTANCE: in one of realisation versions, pilot signals are transferred along a downlink and an upperlink, and are used to produce estimate responses of the downlink and the upperlink, accordingly. Then two sets of correction factors are identified, being based on estimate responses of the downlink and the upperlink. The calibrated downlink is formed using the first set of correction factors for the downlink, and the calibrated upperlink is formed using the second set of correction factors for the upperlink. The first and the second sets of correction factors may be determined using calculation of matrices ratio or calculation with a minimum mean square error (MMSE). Calibration may be carried out on a real time basis based on their transfer along a radio channel.
EFFECT: account of differences in frequency responses of transmitting and receiving circuits in a point of access and a user terminal.
38 cl, 6 dwg
Title | Year | Author | Number |
---|---|---|---|
SYSTEM WITH MULTIPLE INPUTS AND MULTIPLE OUTPUTS (MIMO) WITH MULTIPLE MODES OF SPACE MULTIPLEXING | 2003 |
|
RU2330381C2 |
PILOTS-SIGNALS FOR COMMUNICATION SYSTEM WITH SET OF IMPUTS AND SET OF OUTPUTS (MIMO) | 2003 |
|
RU2349042C2 |
CHANNEL CALIBRATION FOR DUPLEX COMMUNICATION SYSTEM WITH TIME DIVISION MULTIPLEX | 2006 |
|
RU2407151C2 |
CHANNEL EVALUATION AND SPATIAL PROCESSING FOR TDD MIMO SYSTEMS | 2003 |
|
RU2351071C2 |
MULTIPLE-INPUT AND MULTIPLE-OUTPUT (MIMO) SYSTEM WITH MULTIPLE SPATIAL MULTIPLEXING MODES | 2003 |
|
RU2477001C2 |
OBTAINING EIGEN VECTORS FOR SPATIAL PROCESSING IN MIMO COMMUNICATION SYSTEMS | 2003 |
|
RU2337493C2 |
RANDOM ACCESS FOR MULTIPLE ACCESS WIRELESS COMMUNICATION SYSTEMS | 2009 |
|
RU2417560C2 |
TRANSMISSION WITH MULTIPLE CARRIERS USING MULTIPLE SIZES OF OFDM SYMBOLS | 2003 |
|
RU2380845C2 |
RANDOM ACCESS FOR WIRELESS COMMUNICATION SYSTEMS WITH MULTIPLE ACCESS | 2003 |
|
RU2359412C2 |
MULTIELEMENT TRANSMISSION FOR SPACE-DIVISION MULTIPLE ACCESS | 2004 |
|
RU2346391C2 |
Authors
Dates
2011-12-20—Published
2009-09-17—Filed