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Analysis of TFCI coding performance of WCDMA systems

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4 Author(s)
Sung Lark Kwon ; LG Electron., South Korea ; Bonghoe Kim ; Sungkwon Hong ; Heegul Park

In WCDMA system, transport format combination indicator (TFCI) is encoded by an encoder based on Reed-Muller code and transmitted in a time-multiplexed fashion. When the number of TFCI information bits is less than the number of input bits to encoder, subset of basis sequences should be used. In this paper, we analyze the upper bound of word error rate (WER) of TFCI coding and find the optimal subset of basis sequences that minimize the bound. Since the bound of the WER is dependent on the channel correlation, the basis sequences to mitigate the effect of channel correlation are selected. From the result, a basis sequence with uniformly distributed bit of '1' is firstly chosen in optimal subset of basis sequences. The choice of basis sequences is more significant for high mobile speed.

Published in:

IEEE Communications Letters  (Volume:9 ,  Issue: 11 )