Blocking bit loading method in selective frequency blocking transmission system

A technology of block transmission and bit loading, applied in the direction of multi-frequency code system, etc., can solve the problems of drop, no application, high complexity wireless environment, etc.

Inactive Publication Date: 2005-11-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0045] The bit loading technique proposed by Fischer and Huber (“A new loading algorithm for discrete multitone transmission” Fischer, R.F.H.; Huber, J.B.; Global Telecommunications Conference, 18-22 Nov.1996 Page(s): 724-728 vol.1) is a An OFDM bit-loading technology with very good performance, but due to the high complexity of

Method used

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  • Blocking bit loading method in selective frequency blocking transmission system
  • Blocking bit loading method in selective frequency blocking transmission system
  • Blocking bit loading method in selective frequency blocking transmission system

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Experimental program
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Embodiment

[0082] figure 1 A system block diagram for realizing the proposed method of the present invention is provided, and the functions of each module are as follows:

[0083] Source module 1: Generate data to be transmitted.

[0084] Blocking module 2: Determine the block information transmitted from the module 21 according to the block and modulation mode, and allocate the data generated by the source to each block.

[0085] Mapping module 3: Determine the modulation mode information from the module 21 according to the block and modulation mode, select a different modulation mode (QAM or MPSK), and map the data generated by the signal source to the corresponding point of the constellation.

[0086] Block FFT module 4: Determine the block information transmitted from the module 21 according to the block and modulation mode, perform FFT transformation on each block, and transform the data of each block into the frequency domain.

[0087] Spectrum transformation module 5: According ...

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Abstract

This invention discloses a block bit loading method in a frequency selective single carrier block transmission system including the following steps: 1, determining a code rate of transmission after setting up the communication, the receive end blocks usable sub-channels to form block information, 2, assigning the general bit number transmitted by each frame to the usable sub-channels to block the source and decides the modulation way applied in each block to form modulation information 3, the transmission end blocks the source information based on the above information to make modulation image to the points in the block then to make DFT for each block and convert these frequency domain signals to the time domain with IDFT after they get new signal spectrums to get due out signals 4, the receive end receives signals to transform them into the frequency domain for balance and resumes signals of each point to their corresponding blocks based on the block information and makes IDFT in blocks to convert them back to the time domain for judgment.

Description

(1) Technical field [0001] The invention relates to a broadband digital communication transmission method, and belongs to the technical field of broadband communication. (2) Background technology [0002] Communication technology has developed rapidly in recent decades, especially since the 1990s, and has had a profound impact on people's daily life and the development of the national economy. In the future, communication technology is developing towards broadband and high-speed, so many broadband digital transmission technologies have received extensive attention. Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM: Orthogonal Frequency Division Multiplexing) and single-carrier block transmission technology (also known as Single Carrier with Frequency Domain Equalization, hereinafter referred to as SC-FDE: Single Carrier with Frequency Domain Equalization) are two broadband digital transmission technologies that are valued by people. They both belong...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 杜岩袁静宫良李剑飞
Owner SHANDONG UNIV
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