Iterative interference suppression using mixed feedback weights and stabilizing step sizes
First Claim
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1. An interference suppression method, comprising:
- receiving a plurality of constituent signals;
combining the plurality of constituent signals to produce a synthesized received signal;
subtracting the synthesized received signal from a received signal to produce a residual signal; and
scaling the residual signal by a stabilizing step size to produce a scaled residual signal.
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Abstract
A receiver is configured for canceling intra-cell and inter-cell interference in coded, multiple-access, spread-spectrum transmissions that propagate through frequency-selective communication channels. The receiver employs iterative symbol-estimate weighting, subtractive cancellation with a stabilizing step-size, and mixed-decision symbol estimate. Receiver embodiments may be implemented explicitly in software of programmed hardware, or implicitly in standard Rake-based hardware either within the Rake (i.e., at the finger level) or outside the Rake (i.e., at the user of subchannel symbol level).
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20 Claims
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1. An interference suppression method, comprising:
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receiving a plurality of constituent signals; combining the plurality of constituent signals to produce a synthesized received signal; subtracting the synthesized received signal from a received signal to produce a residual signal; and scaling the residual signal by a stabilizing step size to produce a scaled residual signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A non-transitory computer-readable storage medium, comprising a plurality of instructions, that in response to being executed, cause a receiver to:
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combine a plurality of constituent signals for a received multiple-access communications signal to produce a synthesized received signal; subtract the synthesized received signal from the received multiple-access communications signal to produce a residual signal; and scale the residual signal by a stabilizing step size to produce a scaled residual signal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A receiver, comprising:
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a front-end configured to receive a signal and generate a plurality of constituent signals for the received signal; and an interference suppressor configured to; receive the plurality of constituent signals; combine the plurality of constituent signals to produce a synthesized received signal; subtract the synthesized received signal from the received signal to produce a residual signal; and scale the residual signal by a stabilizing step size to produce a scaled residual signal. - View Dependent Claims (17, 18, 19, 20)
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Specification