FIELD: wireless communication.
SUBSTANCE: systems and methods are described for radio frequency (RF) calibration in a multi-user (MU) transmission system (MAS), in which the principle of reciprocity between uplink and downlink channels is applied. RF calibration is used to calculate precoding parameters for downlink without feedback based on estimates of uplink, which makes it possible to reduce costs for feedback when transmitting information on the state of the channel, as in circuits with feedback. For example, MU-MAS system in one design comprises wireless cellular network with one or multiple radio beacons, a plurality of client devices and a plurality of distributed antennae working together, using precoding methods to eliminate interference between clients and increase network throughput.
EFFECT: high spectral efficiency.
22 cl, 25 dwg
| Title |
Year |
Author |
Number |
| SYSTEMS AND METHODS FOR RADIO FREGUENCY CALIBRATION USING PRINCIPLE OF RECIPROCITY OF CHANNELS IN WIRELESS COMMUNICATION SYSTEMS WITH DISTRIBUTED INPUT-DISTRIBUTED OUTPUT |
2014 |
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- Sejbi Fedi
- Pitmen Timoti A.
- Perlman Stiven Dzh.
|
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|
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2014 |
- Forenza, Antonio
- Perlman, Stephen, G.
|
RU2785359C2 |
| EXPLOITING INTER-CELL MULTIPLEXING GAIN IN WIRELESS CELLULAR SYSTEMS |
2013 |
- Forentsa Antonio
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|
RU2663829C2 |
| USE OF INTER-CELLULAR GROWTH DUE TO MULTIPLEXING IN WIRELESS CELLULAR SYSTEMS |
2013 |
- Forenza, Antonio
- Perlman, Stephen G.
|
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| SYSTEM AND METHODS TO COMPENSATE DOPPLER EFFECTS IN WIRELESS SYSTEMS WITH DISTRIBUTED INPUT - DISTRIBUTED OUTPUT |
2013 |
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| SYSTEMS AND METHODS FOR REDUCING INTERFERENCE LEVEL WITHIN ACTIVELY USED FREQUENCY RANGE |
2017 |
- Perlman, Stiven, Dzh.
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- Di Dio, Mario
- Sejbi, Fedi
|
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| SYSTEMS AND METHODS FOR MAPPING VIRTUAL RADIO-CHANNELS INTO PHYSICAL VOLUMES OF COHERENCE IN DISTRIBUTED ANTENNA SYSTEMS |
2015 |
- Perlman Stiven Dzh.
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- Dio Mario Di
- Sejbi Fedi
- Pitmen Timoti A.
|
RU2737312C2 |
| SYSTEMS AND METHODS FOR MAPPING VIRTUAL RADIO POINTS INTO PHYSICAL VOLUMES OF COHERENCE IN DISTRIBUTED ANTENNA SYSTEMS |
2015 |
- Perlman, Stephen G.
- Forenza, Antonio
- Van Der Laan, Roger
- Dio, Mario Di
- Saibi, Fadi
- Pitman, Timothy A.
|
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| SYSTEMS AND METHODS TO COORDINATE TRANSMISSIONS IN DISTRIBUTED WIRELESS SYSTEMS VIA USER CLUSTERING |
2011 |
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