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題名 | 利用MLBD來解調多重調變係數CPFSK之性能分析=Performance Analysis of Noncoherent Demodulated Multi-h CPFSK with MLBD |
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作者姓名(中文) | 楊新雄; 陳俊達; | 書刊名 | 大葉學報 |
卷期 | 10:1 2001.06[民90.06] |
頁次 | 頁87-92 |
分類號 | 448.82 |
關鍵詞 | 最大相似區塊檢測; 多重調變係數CPFSK; 誤碼率; 平坦拉瑞衰減通道; Maximum likelihood block detection; Multi-h CPFSK; Bit error rate; Flat Rayleigh fading channel; |
語文 | 中文(Chinese) |
中文摘要 | 在本文中,我們將最大相似區塊檢測(maximum likelihood block detection, MLBD)的技術推廣至非同調多重調變係數CPFSK(continuous phase frequency shift keying)。我們以解析方法針對不同的多重調變係數碼來推導出在AWGN(additional white gaussian noise)通道下之誤碼率,並驗證了電腦模擬與解析方法有相當近似的結果。一般而言,由於多重調變係數信號的最小歐式(euclidean)距離比MSK(minimum shift keying)來的大,因此多重調變係數CPFSK的同調解調在性能上會比MSK好6 dB。由本論文的結果顯示,多重調變係數CPFSK利用最大相似區塊檢測來解調,在性能上會勝過MSK達2 dB,且當誤碼率為Pb=10-5時,最大相似區塊檢測會比one-bit相差解調好上3到4 dB。我們並經由電腦模擬來得到兩組多重調變係數CPFSK在平坦拉瑞衰減通道(flat rayleigh fading channels)下之最大相似區塊檢測解調的誤碼率。 |
英文摘要 | In this study maximum likelihood block detection (MLBD) techniques are generalized to noncoherent multi-h CPFSK (continuous phase frequency shift keying). Analytical results of the BER (bit error rate) are given for various multi-h codes in AWGN (additional white gaussian noise) channels. The results are in excellent agreement with the simulations. In general, because the minimum Euclidean distance of a multi-h signal is larger than an MSK (minimum shift keying) signal, the performance of a multi-h CPFSK using coherent detection is better than an MSK signal at 6 dB. It is demonstrated that multi-h CPFSK using the MLBD approach outperforms an MSK for 2 dB and performs better than one-bit differential detection at 3 to 4 dB at Pb=10-5. The BERs for two cases of multi-h CPFSK with MLBD in a flat Rayleigh fading channel are obtained by computer simulations. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。