METHOD AND SYSTEM FOR INTERFERENCE REDUCTION
First Claim
1. A method comprising:
- at a base station, receiving uplink signals transmitted from at least one mobile terminal, the uplink signals being sent using a training sequence assigned to the at least one mobile terminal;
estimating a vector channel impulse response for the mobile terminal based on the training sequence contained in the uplink signals;
estimating a spatial signature based on the training sequence for the mobile terminal;
generating one or more uplink nulling weights for the mobile terminal using the estimated spatial signature and interference information representing interfering signals;
generating a scalar channel impulse response from the vector channel impulse response;
detecting one or more uplink symbols contained in uplink signals received from the mobile terminal using the scalar channel impulse response;
generating one or more downlink nulling weights from the uplink nulling weights; and
beamforming downlink signals via a plurality of antennas of the base station to the mobile terminal using the downlink nulling weights.
0 Assignments
0 Petitions
Accused Products
Abstract
A method and system for interference reduction for telecommunication systems are disclosed. The system comprises a base station control device (BCD) for configuring one or more parameters for operating one or more base stations (BSs), a first BS covering a first cell having one or more mobile terminals therein, a second BS covering a second cell neighboring to the first cell and sharing a predetermined frequency band with the first cell, wherein one or more radio frames constructed for communications between the first BS and any mobile terminal of the first cell and one or more radio frames constructed for communications between the second BS and any mobile terminal of the second cell are distinguishable by defining different channel configuration sets having one or more operation parameters, wherein the parameters includes a training sequence, a spreading code, and a channel observation window position.
-
Citations
20 Claims
-
1. A method comprising:
-
at a base station, receiving uplink signals transmitted from at least one mobile terminal, the uplink signals being sent using a training sequence assigned to the at least one mobile terminal; estimating a vector channel impulse response for the mobile terminal based on the training sequence contained in the uplink signals; estimating a spatial signature based on the training sequence for the mobile terminal; generating one or more uplink nulling weights for the mobile terminal using the estimated spatial signature and interference information representing interfering signals; generating a scalar channel impulse response from the vector channel impulse response; detecting one or more uplink symbols contained in uplink signals received from the mobile terminal using the scalar channel impulse response; generating one or more downlink nulling weights from the uplink nulling weights; and beamforming downlink signals via a plurality of antennas of the base station to the mobile terminal using the downlink nulling weights. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A system comprising:
-
a base station configured to wirelessly communication with one or more mobile terminals in a coverage area; at least one mobile terminal configured to send uplink signals to the base station and to receive downlink signals transmitted by the base station; wherein the base station is configured to; estimate a vector channel impulse response for the mobile terminal based on the training sequence contained in uplink signals transmitted by the mobile terminal; estimate a spatial signature based on the training sequence for the mobile terminal; generate one or more uplink nulling weights for the mobile terminal using the estimated spatial signature and interference information representing interfering signals; generate a scalar channel impulse response from the vector channel impulse response; detect one or more uplink symbols contained in uplink signals received from the mobile terminal using the scalar channel impulse response; generate one or more downlink nulling weights from the uplink nulling weights; and beamform downlink signals via a plurality of antennas of the base station to the mobile terminal using the downlink nulling weights. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification