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Equipment and method for transmitting and receiving data in CDMA mobile communication system

A mobile communication system and code division multiple access technology, which is applied in the field of data transmission/reception equipment with data bit reliability, and can solve problems such as the reduction of coding gain effect

Inactive Publication Date: 2003-02-05
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

In this case, the effect of coding gain may be reduced, because the decoding performance of a turbo decoder can only be improved when the input bits have a uniform log-likelihood ratio ("LLR")

Method used

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  • Equipment and method for transmitting and receiving data in CDMA mobile communication system
  • Equipment and method for transmitting and receiving data in CDMA mobile communication system
  • Equipment and method for transmitting and receiving data in CDMA mobile communication system

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Embodiment Construction

[0044] Preferred embodiments of the invention will be described below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

[0045] Various embodiments of the invention relate specifically to modulation orders.

[0046] In a mobile communication system, the coding rate R of the channel coder can be represented by R=k / n, where n and k are related prime numbers. Here, k represents the number of input bits, and n represents the number of output bits. For example, in the case of a systematic coding rate 1 / 2, a channel encoder receives 1 input bit and generates 2 output bits. The output bits consist of 1 systematic bit and 1 parity bit. In the case of an asymmetric coding rate of 3 / 4, the channel encoder receives 3 input bits and produces 4 output bits. The output bits consist of 3 systematic bits and 1 parity bit.

[0047] Hybri...

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Abstract

Disclosed is a data transmission / reception apparatus and method for minimizing decoding errors during high-speed packet transmission in a CDMA mobile communication system. When retransmitting data in the Hybrid Automatic Repeat Request ('H-ARQ') technique, the data transmission / reception apparatus and method performs symbol mapping on coded bits to be retransmitted by allocating different reliabilities to the coded bits according to the number of retransmissions, thus resulting in an improvement of system performance.

Description

technical field [0001] In general, the present invention relates to devices and methods for transmitting and receiving data in a Code Division Multiple Access (CDMA) mobile communication system, and in particular to a method for adjusting the reliability of data bits mapped to modulated symbols before transmission Data transmission / reception apparatus and method. Background technique [0002] In communication systems, the transmitted signal is always mixed with some kind of distortion and noise. A mobile communication system that transmits and receives signals via a wireless network is more susceptible to distortion and noise than a wired communication system. [0003] To this end, various methods have been proposed to reduce the effects of distortion and noise in mobile communication systems. For example, using typical modulation and coding techniques, in an additive white Gaussian noise (“AWGN”) environment, in order to reduce the bit error rate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04J13/00H04L1/00H04L1/18
CPCH04L1/1819H04L1/0071H04L1/1893H04L1/0069H04L1/18
Inventor 金鲁善文庸石金宪基尹在升
Owner SAMSUNG ELECTRONICS CO LTD
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