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US 9,425,915 B2Granted
Interference cancellation
AssigneeQUALCOMM Incorporated
InventorsTaesang Yoo, Tao Luo, Lu Zhao
Life of this patent
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Abstract
A method to enhance coverage and/or throughput in a heterogeneous wireless network includes detecting interference between a neighboring cell and a serving cell. The method also includes cancelling the interference using an adaptive technique based on whether the interference has colliding Common Reference Signal (CRS) tones or whether the interference has colliding Dedicated Reference Signal (DRS) tones.
Claims12
A method for cancelling interference in a wireless network, the method comprising:
- detecting interference between a neighboring cell and a serving cell;
- and
- cancelling the interference based at least in part on the interference being from a Dedicated Reference Signal (DRS) tone of the neighboring cell colliding with a DRS tone of the serving cell and the DRS tone of the neighboring cell colliding with at least one of a control tone or a data tone of the serving cell;
- wherein cancelling the interference comprises:
- estimating a channel of the neighboring cell based at least in part on a Dedicated Reference Signal (DRS) tone of the neighboring cell;
- cancelling the interference from the neighboring cell DRS tone to estimate a serving cell channel;
- and
- estimating the serving cell channel.
5 more elements
An apparatus to enhance coverage in a wireless network, comprising:
- a memory;
- and
- at least one processor coupled to the memory and configured:
- to detect interference between a neighboring cell and a serving cell;
- and
- to cancel the interference based at least in part on the interference being from a Dedicated Reference Signal (DRS) tone of the neighboring cell colliding with a DRS tone of the serving cell and the DRS tone of the neighboring cell colliding with at least one of a control tone or a data tone of the serving cell;
- in which the at least one processor is further configured to cancel interference by:
- estimating a channel of the neighboring cell based at least in part on a Dedicated Reference Signal (DRS) tone of the channel of the neighboring cell;
- cancelling the interference from the neighboring cell DRS tone to estimate a serving cell channel;
- and
- estimating the serving cell channel.
8 more elements
Dependencies are inferred from the claim text.