Method and apparatus for trellis decoding in a multiple-access system
First Claim
1. A method of discerning a signal of a desired user on a channel having the desired user and a plurality of interfering users, each, upon occasion, transmitting an identifiable, known mutually orthogonal pilot symbol, such method comprising the steps of:
- determining a channel response of the desired user and at least one of the plurality of the interfering users based upon transmitted identifiable, known mutually orthogonal pilot symbols of the desired user and at least one of the plurality of interfering users;
calculating a metric based upon the channel responses of the desired user and at least one of the plurality of interfering users; and
, discerning the signal of the desired user based, at least in part, upon the metric.
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Accused Products
Abstract
A method is provided of discerning a signal of a desired user on a channel having a desired user and a plurality of interfering users, each, upon occasion, transmitting an identifiable, known pilot symbol. The method includes the steps of determining a channel response of the desired user and each of the interfering users and calculating a metric equal to the squared difference between a received signal and a sum of the products of transmitted signals and channel responses for the desired user and each of the plurality of interfering users. The method also includes the step of discerning the signal of the desired user based, at least in part, upon a minimum metric.
66 Citations
14 Claims
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1. A method of discerning a signal of a desired user on a channel having the desired user and a plurality of interfering users, each, upon occasion, transmitting an identifiable, known mutually orthogonal pilot symbol, such method comprising the steps of:
- determining a channel response of the desired user and at least one of the plurality of the interfering users based upon transmitted identifiable, known mutually orthogonal pilot symbols of the desired user and at least one of the plurality of interfering users;
calculating a metric based upon the channel responses of the desired user and at least one of the plurality of interfering users; and
, discerning the signal of the desired user based, at least in part, upon the metric. - View Dependent Claims (2, 3, 4, 5, 6)
- determining a channel response of the desired user and at least one of the plurality of the interfering users based upon transmitted identifiable, known mutually orthogonal pilot symbols of the desired user and at least one of the plurality of interfering users;
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7. A method of discerning a signal of a desired user on a channel having the desired user and a plurality of interfering users, each, upon occasion, transmitting an identifiable, known mutually, orthogonal pilot symbol, such method comprising the steps of:
- determining a channel response of the desired user and at least one of the plurality of interfering users based upon the transmitted identifiable, known mutually orthogonal pilot symbol of the desired user and at least one of the plurality of interfering users;
calculating a metric equal to the squared difference between a received signal and a sum of the products of transmitted signals and channel responses for the desired user and at least one of the plurality of interfering users; and
, discerning the signal of the desired user based, at least in part, upon a minimum metric. - View Dependent Claims (8, 9, 10, 11, 12)
- determining a channel response of the desired user and at least one of the plurality of interfering users based upon the transmitted identifiable, known mutually orthogonal pilot symbol of the desired user and at least one of the plurality of interfering users;
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13. An apparatus for discerning a signal of a desired user on a channel having the desired user and a plurality of interfering users, each, upon occasion, transmitting an identifiable, known mutually orthogonal pilot symbol, such apparatus comprising:
- means for determining a channel response of the desired user and at least one of the plurality of interfering users based upon the transmitted identifiable, known mutually orthogonal pilot symbols of the desired user and at least one of the plurality of interfering users;
means for calculating a metric equal to the squared difference between a received signal and a sum of the products of transmitted signals and channel responses for the desired user and at least one of the plurality of interfering users; and
, means for discerning the signal of the desired user based, at least in part, upon a minimum metric. - View Dependent Claims (14)
- means for determining a channel response of the desired user and at least one of the plurality of interfering users based upon the transmitted identifiable, known mutually orthogonal pilot symbols of the desired user and at least one of the plurality of interfering users;
Specification