Generation and decoding of multi-carrier signal
First Claim
Patent Images
1. A method comprising the steps of:
- generating a first orthogonal-multi-carrier signal through N-point inverse discrete Fourier transform, the first orthogonal-multi-carrier signal having “
N”
or less orthogonal multiple carriers, where “
N”
denotes a predetermined natural number equal to or greater than 2; and
repeating every 1-unit time segment of the first orthogonal-multi-carrier signal “
M”
times to generate every 1-symbol time segment of a second orthogonal-multi-carrier signal, the second orthogonal-multi-carrier signal having a thinned set of “
N”
or less orthogonal multiple carriers spaced at M-carrier intervals, where “
M”
denotes a predetermined natural number equal to or greater than 2.
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Abstract
A first orthogonal-multi-carrier signal is generated through N-point inverse discrete Fourier transform. The first orthogonal-multi-carrier signal has “N” or less orthogonal multiple carriers, where “N” denotes a predetermined natural number equal to or greater than 2. Every 1-unit time segment of the first orthogonal-multi-carrier signal is repeated “M” times to generate every 1-symbol time segment of a second orthogonal-multi-carrier signal. The second orthogonal-multi-carrier signal has a thinned set of “N” or less orthogonal multiple carriers spaced at M-carrier intervals, where “M” denotes a predetermined natural number equal to or greater than 2.
21 Citations
10 Claims
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1. A method comprising the steps of:
-
generating a first orthogonal-multi-carrier signal through N-point inverse discrete Fourier transform, the first orthogonal-multi-carrier signal having “
N”
or less orthogonal multiple carriers, where “
N”
denotes a predetermined natural number equal to or greater than 2; and
repeating every 1-unit time segment of the first orthogonal-multi-carrier signal “
M”
times to generate every 1-symbol time segment of a second orthogonal-multi-carrier signal, the second orthogonal-multi-carrier signal having a thinned set of “
N”
or less orthogonal multiple carriers spaced at M-carrier intervals, where “
M”
denotes a predetermined natural number equal to or greater than 2.
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2. A method comprising the steps of:
-
dividing every 1-symbol time segment of a first orthogonal-multi-carrier signal into “
M”
successive 1/M-symbol time segments, the first orthogonal-multi-carrier signal having a thinned set of “
N”
or less orthogonal multiple carriers spaced at M-carrier intervals, where “
M”
denotes a predetermined natural number equal to or greater than 2, and “
N”
denotes a predetermined natural number equal to or greater than 2;
adding and averaging at least two of the “
M”
successive 1/M-symbol time segments of the first orthogonal-multi-carrier signal into a 1-unit time segment of a second orthogonal-multi-carrier signal; and
subjecting the second orthogonal-multi-carrier signal to N-point discrete Fourier transform for every unit time interval.
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3. A method comprising the steps of:
-
generating a first orthogonal-multi-carrier signal through N-point inverse discrete Fourier transform, the first orthogonal-multi-carrier signal having “
N”
or less orthogonal multiple carriers, where “
N”
denotes a predetermined natural number equal to or greater than 2;
repeating every 1-unit time segment of the first orthogonal-multi-carrier signal “
M”
times to generate every 1-symbol time segment of a second orthogonal-multi-carrier signal, the second orthogonal-multi-carrier signal having a thinned set of “
N”
or less orthogonal multiple carriers spaced at M-carrier intervals, where “
M”
denotes a predetermined natural number equal to or greater than 2;
generating a third orthogonal-multi-carrier signal through M×
N-point inverse discrete Fourier transform, the third orthogonal-multi-carrier signal having “
M×
N−
L”
orthogonal multiple carriers, where “
L”
denotes a predetermined natural number equal to or greater than the number “
N”
; and
combining the second orthogonal-multi-carrier signal and the third orthogonal-multi-carrier signal into a fourth orthogonal-multi-carrier signal. - View Dependent Claims (4, 5)
dividing every 1-symbol time segment of the fourth orthogonal-multi-carrier signal into “
M”
successive 1/M-symbol time segments;
adding and averaging at least two of the “
M”
successive 1/M-symbol time segments of the fourth orthogonal-multi-carrier signal into a 1-unit time segment of a fifth orthogonal-multi-carrier signal; and
subjecting the fifth orthogonal-multi-carrier signal to N-point discrete Fourier transform for every unit time interval.
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5. A method as recited in claim 3, wherein the third orthogonal-multi-carrier signal contains a pilot signal.
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6. An apparatus comprising:
-
means for generating a first orthogonal-multi-carrier signal through N-point inverse discrete Fourier transform, the first orthogonal-multi-carrier signal having “
N”
or less orthogonal multiple carriers, where “
N”
denotes a predetermined natural number equal to or greater than 2; and
means for repeating every 1-unit time segment of the first orthogonal-multi-carrier signal “
M”
times to generate every 1-symbol time segment of a second orthogonal-multi-carrier signal, the second orthogonal-multi-carrier signal having a thinned set of “
N”
or less orthogonal multiple carriers spaced at M-carrier intervals, where “
M”
denotes a predetermined natural number equal to or greater than 2.
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7. An apparatus comprising:
-
means for dividing every 1-symbol time segment of a first orthogonal-multi-carrier signal into “
M”
successive 1/M-symbol time segments, the first orthogonal-multi-carrier signal having a thinned set of “
N”
or less orthogonal multiple carriers spaced at M-carrier intervals, where “
M”
denotes a predetermined natural number equal to or greater than 2, and “
N”
denotes a predetermined natural number equal to or greater than 2;
means for adding and averaging at least two of the “
M”
successive 1/M-symbol time segments of the first orthogonal-multi-carrier signal into a 1-unit time segment of a second orthogonal-multi-carrier signal; and
means for subjecting the second orthogonal-multi-carrier signal to N-point discrete Fourier transform for every unit time interval.
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8. An apparatus comprising:
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means for generating a first orthogonal-multi-carrier signal through N-point inverse discrete Fourier transform, the first orthogonal-multi-carrier signal having “
N”
or less orthogonal multiple carriers, where “
N”
denotes a predetermined natural number equal to or greater than 2;
means for repeating every 1-unit time segment of the first orthogonal-multi-carrier signal “
M”
times to generate every 1-symbol time segment of a second orthogonal-multi-carrier signal, the second orthogonal-multi-carrier signal having a thinned set of “
N”
or less orthogonal multiple carriers spaced at M-carrier intervals, where “
M”
denotes a predetermined natural number equal to or greater than 2;
means for generating a third orthogonal-multi-carrier signal through M×
N-point inverse discrete Fourier transform, the third orthogonal-multi-carrier signal having “
M×
N−
L”
orthogonal multiple carriers, where “
L”
denotes a predetermined natural number equal to or greater than the number “
N”
; and
means for combining the second orthogonal-multi-carrier signal and the third orthogonal-multi-carrier signal into a fourth orthogonal-multi-carrier signal. - View Dependent Claims (9, 10)
means for dividing every 1-symbol time segment of the fourth orthogonal-multi-carrier signal into “
M”
successive 1/M-symbol time segments;
means for adding and averaging at least two of the “
M”
successive 1/M-symbol time segments of the fourth orthogonal-multi-carrier signal into a 1-unit time segment of a fifth orthogonal-multi-carrier signal; and
means for subjecting the fifth orthogonal-multi-carrier signal to N-point discrete Fourier transform for every unit time interval.
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10. An apparatus as recited in claim 8, wherein the third orthogonal-multi-carrier signal contains a pilot signal.
Specification