Method for determining reserved tones and transmitter for performing papr reduction using tone reservation

Active Publication Date: 2016-12-15
SAMSUNG ELECTRONICS CO LTD
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Benefits of technology

[0024]According to various exemplary embodiments of the present disclosure, when PAPR reduction is performed, it is possible to prevent a new peak from occurring, thereby more efficiently reducing a PAPR.

Problems solved by technology

An OFDM signal having a very high PAPR deteriorates efficiency of a high power amplifier and the high power amplifier is operated in a non-linear region out of a linear operation range thereof, and thus, the OFDM signal is distorted.
Accordingly, there is a problem that performance of a transmission and/or reception system is degraded.
However, the exemplary embodiments are not required to overcome the disadvantages described above, and may not overcome the above problem described above.

Method used

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  • Method for determining reserved tones and transmitter for performing papr reduction using tone reservation
  • Method for determining reserved tones and transmitter for performing papr reduction using tone reservation
  • Method for determining reserved tones and transmitter for performing papr reduction using tone reservation

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Example

[0034]Hereinafter, the exemplary embodiments of the inventive concept will be described in more detail with reference to the accompanying drawings.

[0035]The exemplary embodiments relate to a method for reducing a PAPR using a tone reservation (TR) scheme, in a system in which a signal is transmitted by an OFDM scheme. Particularly, according to the exemplary embodiments, in order to efficiently reduce a PAPR while avoiding collision with pilots by considering positions of carriers in which the pilots exist in an OFDM symbol, carriers of specific positions are used as reserved tones.

[0036]First, a method for reducing a PAPR according to a tone reservation method is as follows. In the tone reservation method, tones are reserved for some of carriers. Here, the reserved tones do not transmit data and are used to reduce a PAPR. In this case, since a receiver neglects the reserved tones which do not transmit data and restores the data only from a signal at a tone position of data, there is a

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Abstract

A method of determining reserved tones for reduction of a peak to average power ratio (PAPR) includes: selecting carrier indices for the reserved tones and generating a kernel signal based on the selected carrier indices; calculating a comparison reference average value of the kernel signal, selecting one of the calculated comparison reference average value and a prestored comparison reference average value, and preliminarily determining carrier indices of the reserved tones based on the selection; re-arranging an order of the preliminarily determined carrier indices; calculating a comparison reference average value of a kernel signal generated, whenever each of the re-arranged carrier indices is changed to another carrier index, to generate a plurality of comparison reference average values, and finally determining carrier indices of the reserved tones which generates a kernel signal having the smallest comparison reference average value among the comparison reference average values as the indices of the reserved tones.

Description

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Claims

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Application Information

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Owner SAMSUNG ELECTRONICS CO LTD
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