GEP19991765B - Method and Apparatus for Coherent Communication in a Spread-Spectrum Communication System
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Method and Apparatus for Coherent Communication in a Spread-Spectrum Communication System
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Publication number
GEP19991765B
GEP19991765BGEAP19942687AGEAP1994002687AGEP19991765BGE P19991765 BGEP19991765 BGE P19991765BGE AP19942687 AGEAP19942687 AGE AP19942687AGE AP1994002687 AGEAP1994002687 AGE AP1994002687AGE P19991765 BGEP19991765 BGE P19991765B
Authority
GE
Georgia
Prior art keywords
stream
communication
samples
data symbols
estimated
Prior art date
Application number
GEAP19942687A
Inventor
Ling Fuyun
Original Assignee
Motorola Inc
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Filing date
Publication date
Application filed by Motorola IncfiledCriticalMotorola Inc
Priority to GEAP19942687ApriorityCriticalpatent/GEP19991765B/en
Publication of GEP19991765BpublicationCriticalpatent/GEP19991765B/en
1. Technical Result Increase of communication systems reliability. 2. Essence A method and apparatus for encoding and decoding to facilitate coherent communication. In encoding, reference symbols are inserted into a stream of data symbols 110 to form a reference coded stream of input data symbols 114. Subsequently, the reference coded stream of input data symbols are prepared for transmission over a communication channel by spreading the reference coded stream of input data symbols with a spreading code prior to transmission over the communication channel. In decoding, a received communication signal 120 is despread with a spreading code to derive a stream of reference samples 132 and a stream of data samples 138. The channel response is estimated by utilizing the stream of reference samples 132. An estimated data symbol is detected from the stream of data samples 138 by utilizing the estimated channel response. 3. Field of Application Electric communication equipment. 4 ind. cl., 6 dep. cl., 3 fig.
GEAP19942687A1994-02-161994-02-16Method and Apparatus for Coherent Communication in a Spread-Spectrum Communication System
GEP19991765B
(en)