Interference-weighted communication signal processing systems and methods
First Claim
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1. A communication signal receiver comprising:
- an input for receiving a communication signal, the communication signal comprising signal components; and
a processor adapted to;
receive the communication signal from the input, to estimate interference in the communication signal, wherein a first interference estimate is based on a first modulated symbol of a first signal component in the communication signal and a second interference estimate is based on a second modulated symbol of a second signal component in the communication signal;
apply a first weight based on the first interference estimate to a first signal component of the communication signal; and
apply a second weight based on the second interference estimate to a second signal component of the communication signal.
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Abstract
A level of interference affecting signal components of received communication signals is estimated and used to weight the signal components. The signal components in a each of a number of groups of signal components are weighted based on respective interference estimates to thereby adjust signal components for colored interference, which may vary significantly between different groups of signal components. Each group of signal components may include a single component or components within a relatively narrow sub-band of the communication signals, such as a coherence bandwidth of an Orthogonal Frequency Division Multiplexing (OFDM) signal.
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Citations
45 Claims
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1. A communication signal receiver comprising:
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an input for receiving a communication signal, the communication signal comprising signal components; and a processor adapted to;
receive the communication signal from the input, to estimate interference in the communication signal, wherein a first interference estimate is based on a first modulated symbol of a first signal component in the communication signal and a second interference estimate is based on a second modulated symbol of a second signal component in the communication signal;
apply a first weight based on the first interference estimate to a first signal component of the communication signal; and
apply a second weight based on the second interference estimate to a second signal component of the communication signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of processing communication signals comprising:
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receiving a communication signal, the communication signal comprising a plurality of signal components; estimating interference affecting the received communication signal to obtain at least a first interference estimate based on a first modulated symbol of a first signal component from the plurality of signal components and a second interference estimate based on a second modulated symbol of a second signal component from the plurality of signal components; and applying a first weight based on the first interference estimate to a first signal component of the plurality of signal components, and applying a second weight based on the second interference estimate to a second signal component of the plurality of signal components. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A communication signal receiver system for Orthogonal Frequency Division Multiplexing (OFDM) communications, comprising:
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an antenna system for receiving an OFDM communication signal having a plurality of sub-carrier signal components; means for estimating interference in the received communication signal to obtain at least a first interference estimate and a second interference estimate wherein each interference estimate is based on at least one modulated symbol of one of the plurality of sub-carrier components; means for applying a first weight based on the first interference estimate to a first sub-carrier signal component of the plurality of sub-carrier signal components, and to apply a second weight based on the second interference estimate to a second sub-carrier signal component of the plurality of sub-carrier signal components; and means for processing the weighted signal components. - View Dependent Claims (40, 41, 42, 43)
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44. A communication signal receiver comprising:
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an input for receiving a communication signal, the communication signal comprising signal components; and a processor adapted to; receive the communication signal from the input, wherein the communication signal comprises a plurality of sub-carrier signal components; generate a first interference estimate for a first signal component from the plurality of sub-carrier signal components of the communication signal, wherein the first interference estimate is based on at least one modulated symbol of one of the plurality of sub-carrier components; and apply a first weight based on the first interference estimate to the first signal component of the communication signal. - View Dependent Claims (45)
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Specification