Invention Grant
- Patent Title: Combinational fuzzy-decision Viterbi decoding scheme and device for vehicular communications system via time-varying channels
- Patent Title (中): 组合模糊决策维特比解码方案和通过时变信道的车载通信系统装置
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Application No.: US11534201Application Date: 2006-09-21
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Publication No.: US07676004B2Publication Date: 2010-03-09
- Inventor: Jeich Mar , Chi-Cheng Kuo
- Applicant: Jeich Mar , Chi-Cheng Kuo
- Applicant Address: TW Taoyuan
- Assignee: Yuan Ze University
- Current Assignee: Yuan Ze University
- Current Assignee Address: TW Taoyuan
- Agency: WPAT., P.C.
- Agent Justin King
- Priority: TW95127636A 20060728
- Main IPC: H03D1/00
- IPC: H03D1/00
Abstract:
The invention presents a combinational fuzzy-decision Viterbi decoder, which combines the modified Π and S-membership functions, to further improve the performance of the dedicated short-range communications (DSRC) system operated in the time-varying fading channel. The combinational fuzzy-decision Viterbi decoder includes parallel-to-serial converter, fuzzy-decision constellation decoder and analog Viterbi decoder. The coding gain of the DSRC system using the proposed combinational fuzzy-decision Viterbi decoder is compared with both the hard-decision and soft-decision Viterbi decoder for the BPSK, QPSK, 16-QAM and 64-QAM OFDM DSRC systems. The improvement in performance of the DSRC system achieved by replacing the hard decision and soft decision Viterbi decoder with the proposed combinational fuzzy-decision Viterbi decoder will be validated with simulations.
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