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Method of transmitting data using constellation rearrangement

a constellation rearrangement and data technology, applied in the field of wireless communication, can solve the problem of limited overall system performance, and achieve the effect of improving the performance of wireless communication system and diversification gain

Inactive Publication Date: 2010-08-19
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method and apparatus for improving performance of a wireless communication system by using constellation rearrangement. This technique can be applied to various schemes such as MIMO system, HARQ, and multi-level modulation. By rearranging the order of bits in a data block, additional diversity gain can be obtained, resulting in improved performance of the system. The invention also provides a method for generating new data symbols by performing swapping or inversion on bits constituting a data block. Overall, the invention provides a way to enhance the reliability and performance of wireless communication systems.

Problems solved by technology

Unfortunately, packet errors by fading channel environment and interferences originated from various sources make the capacity of overall system to be limited.

Method used

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  • Method of transmitting data using constellation rearrangement

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Embodiment Construction

[0036]The technology described below can be used in various wireless communication systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. The CDMA can be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA-2000. The TDMA can be implemented with a radio technology such as global system for mobile communications (GSM) / general packet ratio service (GPRS) / enhanced data rate for GSM evolution (EDGE). The OFDMA can be implemented with a radio technology such as institute of electrical and electronics engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), etc. The UTRA is a part of a universal mobile telecommunication system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of an e...

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Abstract

A data retransmission method using hybrid automatic repeat request (HARQ) includes transmitting a data block, receiving a retransmission request signal for the data block, generating a retransmission block by performing swapping or inversion between bits constituting the data block according to the retransmission request signal, and transmitting the retransmission block.

Description

TECHNICAL FIELD[0001]The present invention relates to wireless communications, and more particularly, to a method and apparatus using constellation rearrangement in a wireless communication system.BACKGROUND ART[0002]Current development in advanced wireless communication has led to the requirement of high spectral efficiency and reliable communication. Unfortunately, packet errors by fading channel environment and interferences originated from various sources make the capacity of overall system to be limited.[0003]Hybrid Automatic Repeat Request (HARQ) which is ARQ protocol combined with Forward Error Correction (FEC) is strongly considered as one of cutting edge technologies for future reliable communication. The HARQ scheme can largely be classified into the type of two. One is HARQ-Chase Combining (CC) which is disclosed in D. Chase, Code Combining: A maximum-likelihood decoding approach for combining an arbitrary number of noisy packets, IEEE Trans. on Commun., Vol. 33, pp. 593-...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L1/18G06F11/14
CPCH04L1/1819H04L1/08H04L1/1893H04L1/18H04B7/02H04L7/04
Inventor MOON, SUNG HONAM, SEUNG WOOKIM, JONG MINPARK, HYUNG HOCHO, HAN GYUCHOI, JIN SOOCHUNG, JAE HOONHAN, JONG YOUNGLEE, SUK WOO
Owner LG ELECTRONICS INC
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