Impulse noise detection from preamble symbols
First Claim
1. A method for detecting impulse noise in a preamble sequence, the method comprising:
- receiving the preamble sequence that includes a plurality of preamble symbols;
dividing the plurality of preamble symbols by at least one known preamble symbol to produce a plurality of preamble gains corresponding to tho plurality of preamble symbols; and
determining based upon the plurality of preamble gains, that at least one preamble symbol has been adversely affected by impulse noise by;
from the plurality of preamble gains, determining a gain differential sequence that includes a plurality of gain differential values; and
for each gain differential value that exceeds a gain differential threshold, determining that a corresponding preamble symbol has been adversely affected by impulse noise.
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Accused Products
Abstract
A communication device constructed according to the present invention detects impulse noise in a preamble sequence. In detecting impulse noise in the preamble sequence the communication device first receive a preamble sequence that includes a plurality of preamble symbols. The communication device then divides the plurality of preamble symbols by at least one known preamble symbol to produce a plurality of preamble gains and/or a plurality of preamble phases corresponding to the plurality of preamble symbols. Finally, the communication device determines, based upon the plurality of preamble gains and/or the plurality of preamble phases, that at least one preamble symbol has been adversely affected by impulse noise. The communication device may discard at least one preamble symbol that has been adversely affected by impulse noise from the plurality of preamble symbols. The communication device may combine non-discarded preamble symbols of the plurality of preamble symbols of the preamble sequence to produce a composite result.
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Citations
34 Claims
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1. A method for detecting impulse noise in a preamble sequence, the method comprising:
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receiving the preamble sequence that includes a plurality of preamble symbols; dividing the plurality of preamble symbols by at least one known preamble symbol to produce a plurality of preamble gains corresponding to tho plurality of preamble symbols; and determining based upon the plurality of preamble gains, that at least one preamble symbol has been adversely affected by impulse noise by; from the plurality of preamble gains, determining a gain differential sequence that includes a plurality of gain differential values; and for each gain differential value that exceeds a gain differential threshold, determining that a corresponding preamble symbol has been adversely affected by impulse noise. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for detecting impulse noise in a preamble sequence, the method comprising:
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receiving the preamble sequence that includes a plurality of preamble symbols; dividing the plurality of preamble symbols by at least one known preamble symbol to produce a plurality of preamble phases corresponding to the plurality of preamble symbols; and determining, based upon the plurality of preamble phases, that at least one preamble symbol has been adversely affected by impulse by; from the plurality of preamble phases, determining a phase differential sequence that includes a plurality of phase differential values; and for each phase differential value that exceeds a phase differential threshold, determining that a corresponding preamble symbol has been adversely affected by impulse noise. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A communication device comprising:
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a communication device front end that receives an incoming analog signal and that processes the incoming analog signal to produce a preamble sequence; a communication receiver operably coupled to the communication device front end that performs a plurality of operations to detect impulse noise in the preamble sequence, wherein the communication receiver; receives the preamble sequence that includes a plurality of preamble symbols; divides the plurality of preamble symbols by at least one known preamble symbol to produce a plurality of preamble gains corresponding to the plurality of preamble symbols; and determines, based upon the plurality of preamble gains, that at least one preamble symbol has been adversely affected by impulse noise by; determining a gain differential sequence from the plurality of preamble gains that includes a plurality of rain differential values; and for each gain differential value that exceeds a gain differential threshold, determine that a corresponding preamble symbol has been adversely affected by impulse noise. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A communication device comprising:
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a communication device front end that receives an incoming analog signal and that processes the incoming analog signal to produce a preamble sequence; a communication receiver operably coupled to the communication device front end that performs a plurality of operations to detect impulse noise in the preamble sequence, wherein the communication receiver; receives the preamble sequence that includes a plurality of preamble symbols; divides the plurality of preamble symbols by at least one known preamble symbol to produce a plurality of preamble phases corresponding to the plurality of preamble symbols; and determines, based upon the plurality of preamble phases, that at least one preamble symbol has been adversely affected by impulse noise by; determining a phase differential sequence from the plurality of preamble phases that includes a plurality of phase differential values; and for each phase differential value that exceeds a gain differential threshold, determining that a corresponding preamble symbol has been adversely affected by impulse noise. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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Specification