A QUASI-CONSTANT ENVELOPE QUADRATURE OVERLAPPED MODULATION AND ITS PERFORMANCE OVER NON-LINEAR BAND LIMITED SATELLITE CHANNELS

✍ Scribed by CHEN, X. H. ;OKSMAN, J.

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 658 KB
• Volume: 14
• Category: Article
• ISSN: 0737-2884
• DOI: 10.1002/(sici)1099-1247(199607)14:4<351::aid-sat552>3.0.co;2-6

✦ Synopsis

A new quadrature-overlapped modulation (QOTRC modulation) with a quasi-constant , envelope is proposed in this paper. The new modulation possesses fast-decayed spectral side lobes. Bandwidth efficiency and detection efficiency of the new modulation under coherent detection over a band-limited non-linear satellite channel are studied and compared with those of MSK (a constant-envelope modulation) and SQORC (staggered quadrature-overlapped raised-cosine) modulations. The results obtained in this paper show that the new modulation can offer a satisfactory bit error rate (BER), which is comparable to or even better than that of MSK and much better than that of SQORC (a previously reported quadrature-overlapped modulation), depending on the signal-to-noise ratios (SNRs) and system bandwidth.