A new spect of offset and step size on BER perfermance in soft quantization Viterbi receiver 


Vol. 27,  No. 1, pp. 26-34, Jan.  2002


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  Abstract

Mobile telecommunication systems such as IS-95 and IMT-2000 employ frame based communication using frames up to 20 msec in length and the receiving end has to store the whole frame before it is being processed. The size of the frame buffer often dominates those of the processing unit such as soft decision Yiterbi decoder. The frame buffer for IMT-2000, for example, has to be increased 80 times as large as that of IS-95. One of the parameters deciding the number of bits in a frame will be obviously the number of bits in soft quantization. Start after striking space key 2 times.
This paper has studied a new aspect of offset and quantization step size on BER performance and proposes a new 3-bit soft quantization algorithm which shows similar performance as thaI of 4-bit soft decision Viterbi receiver. The optimal offset values and step sizes for the other practical quantization levels ---16, 8, 4, 2--- have also been found. In addition, a new optimal symbol metric table has been devised which takes the accumulation value of various repeated signals and produces a resealed 3-bit value.tart after striking space key 2 times.

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  Cite this article

[IEEE Style]

E. Choi, I. Jeong, S. Song, "A new spect of offset and step size on BER perfermance in soft quantization Viterbi receiver," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 1, pp. 26-34, 2002. DOI: .

[ACM Style]

Eun-young Choi, In-tak Jeong, and Sang-seb Song. 2002. A new spect of offset and step size on BER perfermance in soft quantization Viterbi receiver. The Journal of Korean Institute of Communications and Information Sciences, 27, 1, (2002), 26-34. DOI: .

[KICS Style]

Eun-young Choi, In-tak Jeong, Sang-seb Song, "A new spect of offset and step size on BER perfermance in soft quantization Viterbi receiver," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 1, pp. 26-34, 1. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880