Radio transmission device, radio reception device, and method for selecting transmission cancellation subcarriers
AssigneePanasonic Corporation
InventorsKenichi Miyoshi, Mitsuru Uesugi
Life of this patent
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Abstract
Of systematic bits (S) and parity bits (P1, P2) generated by coding (coding rate R=1/3) transmission bits, subcarriers to which parity bits are mapped are designated as candidates for transmission cancellation and subcarriers not to be transmitted are selected from among those candidates. When this selection is made, a selection pattern which corresponds to minimum peak power of an OFDM symbol is used based on values of parity bits and phase relationship between subcarriers.
Claims13
A radio transmission apparatus comprising:
- a coding section that encodes a transmission bit to generate a systematic bit and a parity bit;
- a modulation section that modulates the systematic bit and the parity bit generated by said coding section to generate symbols each consisting of two or more bits;
- a selection section that selects at least one subcarrier to which a symbol consisting of only parity bits is mapped out of the symbols generated by said modulation section;
- a generating section that generates a multicarrier signal using subcarriers other than the subcarrier selected by said selection section;
- and
- a transmission section that transmits the multicarrier signal generated by said generating section.
A radio transmission method in a radio transmission apparatus, the radio transmission method comprising the steps of:
- coding a transmission bit into a systematic bit and a parity bit;
- modulating the systematic bit and the parity bit to generate symbols each having two or more bits;
- selecting at least one subcarrier to which a symbol having only parity bits is assigned from a plurality of subcarriers;
- and
- transmitting a multicarrier signal including subcarriers other than the selected subcarrier.
A radio transmission apparatus comprising:
- a coding section operable to code a transmission bit into a systematic bit and a parity bit;
- a modulating section operable to modulate the systematic bit and the parity bit to generate symbols each having two or more bits;
- a selecting section operable to select at least one subcarrier to which a symbol having only parity bits is assigned from a plurality of subcarriers;
- and
- a transmitter operable to transmit a multicarrier signal including subcarriers other than the selected subcarrier.
Dependencies are inferred from the claim text.