Patent ID: 7633853

Claim:
A method of decoding channelisation code set information by a spread spectrum receiver to determine the number P of channelisation codes and the code offset O in a received spread spectrum data transmission, wherein the channelisation code set information includes a first group of bits encoding the number of channelisation codes and a second group of bits encoding the code offset, the method comprising: wherein the maximum number m of multicodes allocated from the spread spectrum data transmission equals 15, and wherein a step of deriving, by the spread spectrum receiver, the number P of channelisation codes in the received spread spectrum data transmission comprises: determining if B is less than (m−A), and if so deriving the number P of channelisation codes according to P=A+1, or otherwise deriving the number P of channelisation codes according to P=m−A, where n = ⌊ m 2 ⌋ + 1 , A is the value of the first group of bits of the channelisation code set information, and B is the value of the second group of bits of the channelisation code set information.