CDMA transmission apparatus

  • US 6,661,783 B1
  • Filed: 03/09/1999
  • Issued: 12/09/2003
  • Est. Priority Date: 03/10/1998
  • Status: Expired due to Term
First Claim
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1. A CDMA mobile communication system, wherein a base station apparatus, when performing asymmetric communications, transmits known reference signals and transmission power control bits at a lower transmission rate than a transmission rate when symmetric communications are performed, anda mobile station receives said transmission power control bits and determines transmission power based on said transmission power control bits;

  • wherein a code length of a spreading code longer than a code length of spreading codes for symmetric communications is used as the spreading code for the downlink of asymmetric communications and said longer spreading code is orthogonal to spreading codes used for other asymmetric communication lines.

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