正交頻率-正交振幅調變之非同調區塊偵測

在本篇論文中，我們結合正交頻率和正交振幅調變兩種技術，並且考慮頻率非選擇性通道（frequency-nonselective channel），在觀察區間內遭受的通道響應能被近似為常數。我們在非同調區塊上應用了正交振福調變(QAM)調變，能夠比傳統正交頻率-正交差分相位鍵移調變(NFSK-LDPSK)和正交頻率-正交相位鍵移調變(NFSK-LPSK)更加具有功率效益。在非同調系統上，GLRT 信號偵測演算法能夠同時結合信號偵測和通道響應估測而不需要浪費其他負載(overhead)和領航符元(pilot symbols) ，並且GLRT 信號偵測演算法能夠在非同調系統上，提供一個低複雜度的非同調接收器。

關鍵字

GLRT檢測；非同調區塊偵測；正交頻率-正交振幅調變；一致性區間

並列摘要

In this paper, we combine frequency and amplitude/phase modulation over frequency-nonselective channel which can be approximated well as a complex constant over one coherence interval. We investigate the noncoherent block modulation that is based on amplitude/phase constellations, that are more power efficiency than conventional differential phase shift keying and NFSK/LDPSK modulation. The GLRT decision rule jointly estimates the channel and the data, and does not require another overhead or pilot symbols, and the decision rule is also used to obtain low complexity signal detection at the receiver.

並列關鍵字

GLRT detection ； noncoherent block detection ； FSK–QAM signal ； coherence interval

參考文獻

[1] G. Ungerboeck, “Channel coding with multilevel/phase signal,” IEEE Trans. Inform. Theory, vol. IT-28, pp.55-67, Jan. 1982

[2] C. Berrou and A. Glavieux, “Near optimum error correcting coding and decoding: Turbo-codes,” IEEE Trans. Commun., vol. 44, pp.1261-1271, Oct. 1996

[4] Char-Dir Chung, “Noncoherent Maximum-Likelihood block detection of orthogonal NFSK-LDPSK signals,” IEEE Trans. Veh.Technol., vol. 51, pp.283-292, March. 2002

[5] Lei Wei, Israel Korn, “Combined frequency and differential phase shift keying with Non-coherent detection in a satellite mobile channel,” IEEE Trans. Veh.Technol., vol. 44, pp.603-609, Aug. 1995

[6] Dilip Warrier, Upamanyu Madhow, “Spectrally Efficient Noncoherent Communication,” IEEE Trans. IT. , vol. 48, pp.651-667, March 2002

國際替代計量

正交頻率-正交振幅調變之非同調區塊偵測

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