首页>
外国专利>
FM stereo decoder incorporating Costas loop pilot to stereo component phase correction
FM stereo decoder incorporating Costas loop pilot to stereo component phase correction
展开▼
机译:FM立体声解码器,将Costas环路导频结合到立体声分量相位校正中
展开▼
页面导航
摘要
著录项
相似文献
摘要
A novel system and method for correcting the residual phase offset between a recovered pilot signal and the received stereo signal. The invention uses a Costas loop as an auxiliary loop in addition to the pilot recovery phase locked loop (PLL) to lock onto the stereo component itself. This auxiliary loop functions to generate a pilot to stereo component phase correction signal that is added to the stereo carrier phase The resultant phase is used to generate the recovered pilot carrier used to demodulate the stereo MPX signal. The Costas loop is activated together with the main pilot recovery PLL that locks onto the pilot tone in the demodulated MPX signal. The auxiliary Costas loop is operative to track and determine a residual phase error of up to several degrees.
展开▼