Frequency-division multiplexing transceive apparatus and method
First Claim
1. A frequency-division multiplexing transmitting apparatus for-sending and receiving data by a frequency spectrum specific to a mobile station, comprising:
- symbol compression and repetition unit for compressing a time domain of each symbol of a transmit symbol sequence, repeating the symbol a prescribed number of times (L times) and rearranging the symbols of the obtained repetitive symbol sequence in such a manner that the symbols will have an arrangement identical with the arrangement of the transmit symbol sequence;
a phase rotating unit for subjecting each symbol of the repetitive symbol sequence after the rearrangement thereof to phase rotation that varies at a speed specific to the mobile station; and
a transmitting unit for transmitting the symbols that have undergone the phase rotation;
wherein said phase rotating unit varies the amount of phase rotation, which is applied to each symbol of the repetitive symbols, in increments of k·
2π
/L (where k represents an integer specific to the mobile station) at the period of the repetitive symbol sequence.
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Accused Products
Abstract
In a frequency-division multiplexing transmitting apparatus for transmitting data at a frequency specific to a mobile station, a symbol compression and repetition unit compresses the time domain of each symbol of a transmit symbol sequence, repeats the symbol a prescribed number of times (L times) and rearranges the symbols of the obtained repetitive symbol sequence in such a manner that the symbols will have an arrangement identical with the arrangement of the transmit symbol sequence; a phase rotating unit applies phase rotation, which varies at a speed specific to the mobile station, to each symbol of the repetitive symbol sequence after the rearrangement thereof; and a transmitting unit transmits the-symbols that have undergone the phase rotation. The phase rotating unit varies the amount of phase rotation, which is applied to each symbol of the repetitive symbols, in increments of k·2π/L (where k represents an integer specific to the mobile station) at the period of the repetitive symbol sequence.
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Citations
14 Claims
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1. A frequency-division multiplexing transmitting apparatus for-sending and receiving data by a frequency spectrum specific to a mobile station, comprising:
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symbol compression and repetition unit for compressing a time domain of each symbol of a transmit symbol sequence, repeating the symbol a prescribed number of times (L times) and rearranging the symbols of the obtained repetitive symbol sequence in such a manner that the symbols will have an arrangement identical with the arrangement of the transmit symbol sequence;
a phase rotating unit for subjecting each symbol of the repetitive symbol sequence after the rearrangement thereof to phase rotation that varies at a speed specific to the mobile station; and
a transmitting unit for transmitting the symbols that have undergone the phase rotation;
wherein said phase rotating unit varies the amount of phase rotation, which is applied to each symbol of the repetitive symbols, in increments of k·
2π
/L (where k represents an integer specific to the mobile station) at the period of the repetitive symbol sequence. - View Dependent Claims (2, 3, 4)
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5. A frequency-division multiplexing transmitting apparatus for transmitting data by a frequency spectrum specific to a mobile station, comprising:
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a spreading unit for multiplying transmit symbols by spreading codes to thereby generate a chip sequence;
a chip compression and repetition unit for compressing a time domain of each chip of the chip sequence, repeating the chip a prescribed number (=CRF) of times and rearranging the chips of the repetitive chip sequence in such a manner that the chips will have an arrangement identical with the original chip arrangement;
a phase rotating unit for subjecting each chip of the repetitive chip sequence after the rearrangement thereof to phase rotation that varies at a speed specific to the mobile station; and
a transmitting unit for transmitting the output of said phase rotating unit;
wherein said phase rotating unit varies the amount of phase rotation, which is applied to each chip of the repetitive chip sequence, in increments of k·
2π
/CRF (where k represents an integer specific to the mobile station) at the period of the repetitive chip sequence. - View Dependent Claims (6, 7, 8)
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9. A frequency-division multiplexing transmitting apparatus for transmitting data by a frequency spectrum specific to a mobile station, comprising:
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a phase rotating unit for subjecting transmit symbols to phase rotation that varies at a speed specific to the mobile station;
a spreading unit for compressing time domains of spreading codes, thereby repeatedly generating the spreading codes a prescribed number (=CRF) of times, and multiplying the output of said phase rotating unit by the repeatedly generated spreading codes; and
a transmitting unit for transmitting the results of multiplication by the spreading codes;
wherein said phase rotating unit varies the amount of phase rotation, which is applied to the transmit symbols, in increments of k·
2π
/CRF (where k represents an integer specific to the mobile station) at the period of the repetitive spreading code sequence. - View Dependent Claims (10, 11)
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12. A frequency-division multiplexing transmitting method for transmitting data by a frequency spectrum specific to a mobile station, comprising:
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a symbol repeating/rearranging step of compressing a time domain of each symbol of a transmit symbol sequence, repeating the symbol a prescribed number of times (L times) and rearranging the symbols of the obtained repetitive symbol sequence in such a manner that the symbols will have an arrangement identical with the arrangement of the transmit symbol sequence;
a phase rotating step of subjecting each symbol of the repetitive symbol sequence after the rearrangement thereof to phase rotation that varies at a speed specific to the mobile station; and
a transmitting step of transmitting the symbols that have undergone the phase rotation;
wherein the amount of phase rotation, which is applied to each symbol of the repetitive symbols, is varied at said phase rotating step in increments of k·
2π
/L (where k represents an integer specific to the mobile station) at the period of the repetitive symbol sequence. - View Dependent Claims (13, 14)
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Specification