CORRELATION TYPE DEMODULATION OF 4-LEVEL FULL-RESPONSE CPFSK SIGNALS

Öz

An 8-D signal space vector representation for 4-level full-response CPFSK signals is derived by using Gram-Schmidt orthogonalisation procedure, and the corresponding correlation type demodulator for the modulation has been constructed. The presented vector representation results are also important in that they can be directly used for the software simulation of 4-level CPFSK, which enables making performance assessments of the modulation under varios conditions

Anahtar Kelimeler

• CPFSK, Demodulation, Correlation receiver, Signal space

4-SEVİYELİ TAM CEVAPLI SEFKA SİNYALLERİNİN İLİNTİ TABANLI DEMODÜLASYONU

Öz

derived by using Gram-Schmidt orthogonalisation procedure, and the corresponding correlation type demodulator for the modulation has been constructed. The presented vector representation results are also important in that they can be directly used for the software simulation of 4-level CPFSK, which enables making performance assessments of the modulation under varios conditions

Anahtar Kelimeler

• SEFKA, Demodülasyon, İlintisel alıcı, Sinyal uzayı

Kaynakça

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3. Bhargava V.R., Haccoun D., Matyas R., Nuspl P.P. (1981): “Digital Communications by Satellite”, New York, John Wiley & Sons.
4. Haykin S. (1994): “Communication Systems”, New York, John Wiley & Sons.
5. Taylor D.P., Chan H.C. (1979): “A Simulation Study of Some Bandwidth-efficient Modulation Techniques”, Canada, MacMaster University, CRL Rep. No. 68.
6. Xiong F., Shivananda V. (1996): “Performance of 1REC-MHPM in the Presence of Adjacent Channel Interference”, IEEE Trans., COM-44, pp. 1635-1639.
7. Xiong F., Bhatmuley S. (1997): “Performance of MHPM in Rician and Rayleigh Fading Mobile Channels”, IEEE Trans., COM-45, pp. 279-283 Sayfa No: 12 T.ERTAŞ r(t) C2 -C -C1 C2 -C1 -C2 1 D2 C4 -C3 1 D2 K6 -K5 1 D3 dt ∫0sT ) Asin 2fc−3 / (πc πh T t (πfc−3 / 1 D1 -K2 K2 -K3 A5 A6 A7 A8 2 /T s A=
8. Şekil 2. 4-SEFKA sinyalleri için çapraz ilinti tabanlı demodülatör/