US 2006/0215780 A1 · Apparatus and method for transmitting a signal in a communication system

Abstract

In a communication system using an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, at least one value mapped to the number of threshold subchannels is compared with the number of subchannels allocated to a signal transmission apparatus in an associated Orthogonal Frequency Division Multiplexing (OFDM) symbol when transmission data including m bits is input. In response to a comparison result, (m−k) bits are generated from the transmission data using at least one of clipping and rounding. The (m−k) bits are converted to an analog signal and the analog signal is transmitted. The number of threshold subchannels is preset to determine whether to use clipping, rounding or both.

Claims11

Dependent claims

A method for transmitting a signal in a communication system using an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, comprising:

comparing at least one value mapped to a number of threshold subchannels with a number of subchannels allocated to a signal transmission apparatus in an associated Orthogonal Frequency Division Multiplexing (OFDM) symbol when transmission data comprising m bits is input;
generating (m−k) bits from the transmission data using at least one of clipping and rounding in response to a comparison result;
and
converting the (m−k) bits to an analog signal and transmitting the analog signal,
wherein the number of threshold subchannels is preset to determine whether to use clipping, rounding or both.

2 more elements

An apparatus for transmitting a signal in a communication system using an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, comprising:

a bit selector for comparing at least one value mapped to a number of threshold subchannels with a number of subchannels allocated to the signal transmission apparatus in an associated Orthogonal Frequency Division Multiplexing (OFDM) symbol when transmission data comprising m bits is input, and generating (m−k) bits from the transmission data using at least one of clipping and rounding in response to a comparison result;
and
a digital-to-analog converter for converting the (m−k) bits to an analog signal,
wherein the number of threshold subchannels is preset to determine whether to use clipping, rounding or both.

1 more element

Dependencies are inferred from the claim text.

Apparatus and method for transmitting a signal in a communication system

Life of this patent

Apparatus and method for transmitting a signal in a communication system

Life of this patent

Abstract

Claims11