Interference suppression for OFDM-based UWB communication
First Claim
1. A method for suppressing interference in a time-frequency hopped, ultra wide bandwidth system, comprising:
- receiving signals corresponding to a transmitted symbol;
frequency demodulating the received signals;
estimating a coefficient vector w that minimizes a cost function where λ
is a weighting factor between 0, x is a vector representing the received signals, H is a frequency response of a channel used to transmit the symbol, and c is a known training symbol;
determining a coefficient vector ŵ
n={circumflex over (R)}n−
1{circumflex over (d)}n, where a correlation matrix for the received signals is and an estimate of a crosscorrelation is and combining the received signals according to
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Abstract
A method suppresses interference in a time-frequency hopped, ultra wide bandwidth system. Signals corresponding to a transmitted symbol are received. The received signals are frequency demodulated, and a coefficient vector w that minimizes a cost function
is estimated, where λ is a weighting factor between 0, x is a vector representing the received signals, H is a frequency response of a channel used to transmit the symbol, and c is a known training symbol. A coefficient vector, ŵn={circumflex over (R)}n−1{circumflex over (d)}n, is determined, where a correlation matrix for the received signals is
and an estimate of a crosscorrelation is
The received signals are then combined according to
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Citations
7 Claims
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1. A method for suppressing interference in a time-frequency hopped, ultra wide bandwidth system, comprising:
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receiving signals corresponding to a transmitted symbol;
frequency demodulating the received signals;
estimating a coefficient vector w that minimizes a cost function where λ
is a weighting factor between 0, x is a vector representing the received signals, H is a frequency response of a channel used to transmit the symbol, and c is a known training symbol;
determining a coefficient vector ŵ
n={circumflex over (R)}n−
1{circumflex over (d)}n,where a correlation matrix for the received signals is and an estimate of a crosscorrelation is and combining the received signals according to - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification