Abstract
This paper gives the results of a simulation study on the performance of JPEG image transmission over AWGN and Rayleigh fading channels using typical and proposed asymmetric turbo codes for error control coding. The baseline JPEG algorithm is used to compress a QCIF ( ) "Suzie" image. The recursive systematic convolutional (RSC) encoder with generator polynomials , that is, (13/11) in decimal, and 3G interleaver are used for the typical WCDMA and CDMA2000 turbo codes. The proposed asymmetric turbo code uses generator polynomials , that is, (13/11; 13/9) in decimal, and a code-matched interleaver. The effect of interleaver in the proposed asymmetric turbo code is studied using weight distribution and simulation. The simulation results and performance bound for proposed asymmetric turbo code for the frame length , code rate with Log-MAP decoder over AWGN channel are compared with the typical system. From the simulation results, it is observed that the image transmission using proposed asymmetric turbo code performs better than that with the typical system.
Highlights
The constraints on bandwidth, power, and time in many image communication systems prohibit transmission of uncompressed raw image data
We present simulation results on an image transmission system using a new class of asymmetric turbo codes [6], which consists of parallel concatenated convolutional codes with 8-state component codes, (13/11; 13/9)
The paper is organized as follows: in Section 2, we present the proposed asymmetric turbo code
Summary
The constraints on bandwidth, power, and time in many image communication systems prohibit transmission of uncompressed raw image data. The parallel concatenation of a 16-state component code with a primitive feedback polynomial adopted by Perez et al is known to lower the “error floor” compared to the Berrou code, but at a cost of poorer performance in the “waterfall” region [3]. We present simulation results on an image transmission system using a new class of asymmetric turbo codes [6], which consists of parallel concatenated convolutional codes with 8-state component codes (fixed constraint length), (13/11; 13/9).
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