Title :
Analog PAL-G signal degradation due to spread spectrum overlay
Author :
Dres, D. ; Constantinou, P.
Author_Institution :
Electr. & Comput. Eng. Dept., Nat. Tech. Univ. of Athens, Greece
fDate :
12/1/2002 12:00:00 AM
Abstract :
Performance degradation of an analog PAL-G signal due to direct sequence spread spectrum overlay is examined. An analytical expression between RF TV protection ratio (CIR) and baseband unweighted signal-to-noise ratio (SNRv), for co-channel spread spectrum and noise interference, is derived. Computer analysis results are presented and compared to experimental measurements for different spread spectrum RF bandwidths and carrier frequency offsets between the analog and digital signal. Image quality degradation is also presented and associated to different level of spread spectrum interference.
Keywords :
cochannel interference; spread spectrum communication; television broadcasting; television reception; video signal processing; white noise; CDMA signal; CIR; DS-SS overlay; RF TV protection ratio; SNR; analog PAL-G signal degradation; analog signal; baseband unweighted signal-to-noise ratio; broadcast TV systems; broadcast television systems; carrier frequency offsets; co-channel spread spectrum interference; digital signal; direct sequence spread spectrum overlay; image quality degradation; noise interference; performance degradation; spread spectrum RF bandwidth; subjective image quality measurements; white noise; Analog computers; Baseband; Degradation; Protection; Radio frequency; Radiofrequency interference; Signal analysis; Signal to noise ratio; Spread spectrum communication; TV interference;
Journal_Title :
Broadcasting, IEEE Transactions on
DOI :
10.1109/TBC.2002.805638
