TRANSMITTING APPARATUS AND METHOD USING TONE RESERVATION IN OFDM SYSTEM
First Claim
1. An apparatus for transmitting orthogonal frequency division multiplexing (OFDM) signals using a tone reservation scheme, the apparatus comprising:
- an inserter to add a transmit format indicator (TFI) to an encoded packet, the TFI including a tone reservation rate for controlling a peak to average power ratio (PAPR);
a reordering module to change order of bits included in the encoded packet by discriminating information bits and parity bits of the encoded packet;
a zero replacement module to replace a portion of the parity bits with at least one bit set for controlling the PAPR;
a transmitter to transmit the replaced output using a plurality of orthogonal sub-carriers; and
a controller to control the tone reservation rate based on status of received signals.
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Abstract
The present invention relates to an apparatus and a method for transmitting orthogonal frequency division multiplexing (OFDM) signals using a tone reservation scheme. Preferably, the present invention comprises an inserter to add a transmit format indicator (TFI) to an encoded packet, the TFI including a tone reservation rate for a peak to average power ratio (PAPR) control; a reordering module to change order of bits included in the encoded packet by discriminating information bits and parity bits of the encoded packet; a zero replacement module to replace a portion of the parity bits with at least one bit set for a PAPR control;’ a transmitter to transmit the replaced output using a plurality of orthogonal sub-carriers; and a controller to control the tone reservation rate based on status of received signals.
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Citations
10 Claims
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1. An apparatus for transmitting orthogonal frequency division multiplexing (OFDM) signals using a tone reservation scheme, the apparatus comprising:
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an inserter to add a transmit format indicator (TFI) to an encoded packet, the TFI including a tone reservation rate for controlling a peak to average power ratio (PAPR); a reordering module to change order of bits included in the encoded packet by discriminating information bits and parity bits of the encoded packet; a zero replacement module to replace a portion of the parity bits with at least one bit set for controlling the PAPR; a transmitter to transmit the replaced output using a plurality of orthogonal sub-carriers; and a controller to control the tone reservation rate based on status of received signals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of transmitting orthogonal frequency division multiplexing (OFDM) signals using a tone reservation scheme, the method comprising,
acquiring information regarding reception status of received signals; - and
transmitting the OFDM signals by sub-carriers corresponding to a total bandwidth, wherein the sub-carriers include at least one sub-carrier allocated by a transmitter for controlling a peak to average power ratio (PAPR), and the at least one sub-carrier is allocated based on a tone reservation rate corresponding to the reception status of received signals. - View Dependent Claims (8, 9, 10)
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Specification