| 摘要 |
IN A TIME GATED FREQUENCY DIVISION DUPLEXING ( FDD ) DATA COMMUNICATION SYSTEM, THE BASE STATION (4) TRANSMITS TWO DATA FRAMES ON THE FORWARD LINK TO THE FIRST REMOTE STATION ( 6A, 6B ) AND RECEIVES TWO DATA FRAMES ONE THE REVERSE LINK FROM THE SECOND REMOTE STATION ( 6A, 6B ) AT THE FIRST TIME FRAME . AT THE SECOND TIME FRAME, THE BASE STATION ( 4 ) TANSMITS TWO DATA FRAMES TO THE SECOND REMOTE STATION AND RECEIVES TWO DATA FRAME FROM THE FIRST REMOTE STATION. DATA TRANSMISSION AND RECEPTION ALTERNATE OVER CONSECUTIVE TIME FRAMES. ON THE FORWARD LINK, EACH DATA FRAME IS COVERED WITH A UNIQUE WALSH CODE. THE DATA IS ALSO SPREAD WITH THE SHORT PNI AND PNQ CODES IN ACCORDANCE WITH THE IS-95A STANDARD. THE DATA CAN BE SCAMBLED BY THE LONG PN CODE. THE BASE STATION ( 4 ) DELAYS THE LONG PN CODE AND SHORT PN CODES AND PROPERLY LOADS THE WALSH CODES SO THAT THE PROCESSED DATA CAN BE PROPERLY DEMODULATED AND DESCRAMBLED BY THE DESTINATION REMOTE STATION ( 6A, 6B ).
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