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OFDM Scheme Based on Wavelet Packet Transform-Oriented Graded Multi-Service(PDF)

Transactions of Tianjin University[ISSN:1006-4982/CN:12-1248/T]

Issue:
2003年04期
Page:
269-272
Publishing date:

Info

Title:
OFDM Scheme Based on Wavelet Packet Transform-Oriented Graded Multi-Service
Author(s):
ZHAO Hui HOU Chun-ping
(School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China)
Keywords:
DOI:

Abstract:
In this paper, a concept of image grading transmission is put forward to enhance data rate and to improve the usage of subcarriers in orthogonal frequency division multiplexing (OFDM). The idea originates from the wavelet packets representative of an image in which information is graded in terms of different priorities. The graded image facilitates more efficient use of adaptive subcarriers and bits allocation. The results of simulation in typical mobile environment prove that the output signal noise ratio (SNR) of the graded image excels that of the ungraded image by 1—2 dB under the same channel condition.

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Last Update: 2011-05-02