Method and apparatus for reducing co-channel interference in a cellular radio system

摘要

In order to reduce common channel interference in the receivers of base and subscriber stations of a cellular radio system in which radio cells with radio channels of the same frequency are used and signals are transmitted by the so-called JD-CDMA process (joint detection-code division multiple access), so that a plurality of connections is processed in parallel in the same HF band, the useful signals are provided each with a different spread code and are spread by a determined factor around the frequency axis and are decoded again at the receiving site by using said spread code. In the receivers of a radio cell, the spread codes of at least another radio cell that uses the same frequency band are at least partially taken into account during decoding. The invention may be used with future CDMA mobile radio systems.