Method and apparatus for pilot signal transmission
First Claim
1. A method for pilot transmission, the method comprising the steps of:
- transmitting a plurality of data symbols over a first plurality of sub-carriers, each sub-carrier within the first plurality of sub-carriers having a first bandwidth;
transmitting first pilot symbols at a first time for a user, the first pilot symbols transmitted in a first pattern over a second plurality of sub-carriers, each sub-carrier from the second plurality of sub-carriers having a second bandwidth; and
transmitting second pilot symbols for the user at a second time, the second pilot symbols transmitted in a second pattern over a third plurality of sub-carriers, each sub-carrier from the third plurality of sub-carriers having a third bandwidth.
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Accused Products
Abstract
A method and apparatus for pilot signal transmission is disclosed herein. In particular, a pilot transmission scheme is utilized where pilot sub-carrier bandwidth differs from data sub-carrier bandwidth. Because some user'"'"'s data sub-carriers will no longer have the user'"'"'s pilot sub-carriers adjacent to them, the set, or pattern of sub-carriers used by the pilot blocks changes at least once in a burst. Changing the pilot block pattern (the set of occupied pilot block sub-carriers) at least once in the burst serves to increase the frequency proximity of occupied data sub-carriers to occupied pilot sub-carriers in the burst.
215 Citations
20 Claims
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1. A method for pilot transmission, the method comprising the steps of:
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transmitting a plurality of data symbols over a first plurality of sub-carriers, each sub-carrier within the first plurality of sub-carriers having a first bandwidth;
transmitting first pilot symbols at a first time for a user, the first pilot symbols transmitted in a first pattern over a second plurality of sub-carriers, each sub-carrier from the second plurality of sub-carriers having a second bandwidth; and
transmitting second pilot symbols for the user at a second time, the second pilot symbols transmitted in a second pattern over a third plurality of sub-carriers, each sub-carrier from the third plurality of sub-carriers having a third bandwidth. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for pilot reception, the method comprising the steps of:
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receiving a plurality of data symbols over a first plurality of sub-carriers, each sub-carrier within the first plurality of sub-carriers having a first bandwidth;
receiving first pilot symbols at a first time for a user, the first pilot symbols received in a first pattern over a second plurality of sub-carriers, each sub-carrier from the second plurality of sub-carriers having a second bandwidth; and
receiving second pilot symbols for the user at a second time, the second pilot symbols received in a second pattern over a third plurality of sub-carriers, each sub-carrier from the third plurality of sub-carriers having a third bandwidth. - View Dependent Claims (8, 9, 10, 11)
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12. An apparatus comprising:
transmission circuitry transmitting a plurality of data symbols over a first plurality of sub-carriers, each sub-carrier within the first plurality of sub-carriers having a first bandwidth, the transmission circuitry additionally transmitting first pilot symbols at a first time for a user, the first pilot symbols transmitted in a first pattern over a second plurality of sub-carriers, each sub-carrier from the second plurality of sub-carriers having a second bandwidth and transmitting second pilot symbols for the user at a second time, the second pilot symbols transmitted in a second pattern over a third plurality of sub-carriers, each sub-carrier from the third plurality of sub-carriers having a third bandwidth. - View Dependent Claims (13, 14, 15)
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16. A method for pilot transmission, the method comprising the steps of:
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transmitting a plurality of data symbols over a first plurality of subcarriers, each subcarrier within the plurality of subcarriers having a first bandwidth;
transmitting pilot symbols at a first time for a user in a first pattern over a second plurality of subcarriers, each subcarrier from the second plurality of subcarriers having a second bandwidth;
determining, whether to transmit pilot symbols or data symbols at a second time for the user over a third plurality of subcarriers, each subcarrier from the third plurality of subcarriers having a third bandwidth;
wherein the first the second, and the third bandwidths are not all equal; and
if the determination is made to transmit data symbols, transmitting a plurality of data symbols at the second time over the third plurality of subcarriers, or if the determination is made to transmit pilot symbols, transmitting pilot symbols for a user in a second pattern at the second time over the third plurality of subcarriers. - View Dependent Claims (17, 18, 19, 20)
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Specification