Noise characterization in a wireless communication system
AssigneeQUALCOMM Incorporated
InventorRoberto Padovani
Life of this patent
Estimating the term…
Abstract
The character of the noise in a series of incoming symbols received over a wireless link is determined. A series of corresponding bits are recovered based upon the series of incoming symbols. The series of corresponding bits are encoded to determine a series of recovered symbols. A vector product of the series of incoming symbols and the series of recovered symbols is determined. A difference between two symbols within the vector product is determined, wherein the two symbols were transmitted over the wireless link in close temporal proximity to one another. The expected value of a non-orthogonal noise portion of the series of incoming symbols is determined based upon an expected value of the difference between the two symbols.
Claims15
A method of noise estimation, comprising the steps of:
- storing a series of incoming symbols received over a wireless link;
- decoding said series of incoming symbols to produce a series of corresponding bits;
- encoding said series of corresponding bits to produce a series of recovered symbols;
- determining a vector product of said series of incoming symbols and said series of recovered symbols;
- determining a difference between two symbols within said vector product, wherein said two symbols were transmitted over said wireless link in close temporal proximity to one another;
- and
- determining an expected value of said difference between said two symbols so as to define an expected value of a non-orthogonal noise portion of said series of incoming symbols.
A receiver, comprising:
- means for storing a series of incoming symbols received over a wireless link;
- means for decoding said series of incoming symbols to produce a series of corresponding bits;
- means for encoding said series of corresponding bits to determine a series of recovered symbols;
- means for determining a vector product of said series of incoming symbols and said series of recovered symbols;
- means for determining a difference between two symbols within said vector product, wherein said two symbols were transmitted over said wireless link in close temporal proximity to one another;
- and
- means for determining an expected value of said difference between said two symbols so as to define an expected value of a non-orthogonal noise portion of said series of incoming symbols.
A receiver comprising:
- a decoder having an input port configured to receive a series of incoming symbols over a wireless link and having an output port configured to produce a series of recovered data bits;
- an encoder having an input port coupled to said output port of said decoder and having an output port configured to produce a series of encoded symbols;
- a vector product block having a first input port coupled to said output port of said encoder and having a second input port configured to receive said series of incoming symbols and having an output port configured to produce a vector product of said series of encoded symbols and said series of incoming symbols;
- a difference block having an input port coupled to said output port of said vector product block and having an output port configured to produce differences between sets of two values of said vector product, wherein said sets of two values correspond to two symbols which were transferred over said wireless link in close temporal proximity to one another;
- and
- a noise estimation block having an input port coupled to said output port of said difference block and configured to determine a statistical characteristic of said differences.
Dependencies are inferred from the claim text.