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Method and device of error control, and method of adaptability modification and device

An error control and adaptive technology, applied in the direction of forward error control, error prevention/detection using return channel, error prevention, etc., can solve the problem of easy fluctuation of bit reliability between symbols

Active Publication Date: 2009-11-18
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bit reliability between symbols is easy to fluctuate, and this problem cannot be solved by the methods proposed by Panasonic's Yoom or Beh et al.

Method used

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  • Method and device of error control, and method of adaptability modification and device
  • Method and device of error control, and method of adaptability modification and device
  • Method and device of error control, and method of adaptability modification and device

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Embodiment Construction

[0087] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the preferred embodiments are specifically cited below, and in conjunction with the accompanying drawings, the detailed description is as follows:

[0088] The description of the present invention provides different examples to illustrate the technical features of different implementations of the present invention. Wherein, the configuration of each element in the embodiment is for illustration, not for limiting the present invention.

[0089] Same as the embodiment, the present invention proposes a method and device for modifying the constellation diagram of an OFDM system.

[0090] Orthogonal frequency division multiplexing or orthogonal frequency division multiple access (OFDMA) systems defined by the IEEE 802.16 standard and commonly referred to as Worldwide Interoperability for Microwave Access (WiMAX) , using modulation schemes such as ...

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Abstract

The invention discloses a method of error control, including forming a plurality of first data symbols from a plurality of data bits, transmitting a first signal including the plurality of first data symbols, receiving a request for retransmission, forming a plurality of second data symbols from the plurality of data bits, and transmitting a second signal including the plurality of second data symbols. At least one of the first data symbols is formed from several of the plurality of data bits such that none of the second data symbols is formed from the several of the plurality of data bits.

Description

technical field [0001] The present invention mainly relates to a method and device for reordering data bits, which are applicable to a hybrid automatic repeat request mechanism. Background technique [0002] Digital communication systems handle transmission errors by providing redundancy information that allows for error detection and / or error correction. To facilitate error detection, redundancy check information, such as cyclic redundancy check (cyclic redundancy check) bits, is transmitted along with the user data. The receiver checks the data for redundancy to determine if an error occurred during transmission. Error correction generally requires more redundancy. Complex forward error correction codes, such as convolutional turbo codes (CTC), provide enough redundancy for the receiver to correct most data transmission errors. In another embodiment, when a data packet is received with an error, the receiver will simply request a retransmission of the data packet. This...

Claims

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Application Information

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IPC IPC(8): H04L1/18
CPCH04L1/1819H04L1/0071H04L1/0068
Inventor 方誉荃陈仁智
Owner IND TECH RES INST