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Method and apparatus for encoding and decoding a supplementary signal 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04B-001/69
  • H04B-001/707
  • H04J-013/02
  • H04J-013/04
출원번호 US-0190433 (1994-02-02)
발명자 / 주소
  • Schaffner T. Michael (Palatine IL) Bayer William R. (Palatine IL) Bach Michael J. (Niles IL)
출원인 / 주소
  • Motorola, Inc. (Schaumburg IL 02)
인용정보 피인용 횟수 : 46  인용 특허 : 0

초록 ▼

A differential coherent modulation and demodulation method and apparatus non-coherently modulates (201) a data stream to generate non-coherently modulated data. The non-coherently modulated data is phase modulated (215) with a supplementary signal (211) to generate coded data. The coded data is then

대표청구항 ▼

A differential coherent modulation and demodulation system, comprising: a non-coherent Walsh modulator for non-coherently modulating source data using Walsh code to provide non-coherently modulated data; a phase modulator operatively connected to said non-coherent Walsh modulator for phase modulatin

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