CDMA system with iterative demapping of a received signal

A CDMA transmitter comprising:

• an encoder and a bit interleaver for processing said CDMA signal to be transmitted;
• means for transmitting said processed CDMA signal;
• and
• said transmitter includes a mapper connected in series with the encoder and bit interleaver;
• wherein the transmitted signal is configured for processing in a receiver having a demapper connected in series with a bit deinterleaver and a decoder, the receiver performing iterative demapping by passing back the output of the decoder to the demapper.

A CDMA receiver comprising:

• means for receiving said transmitted CDMA signal;
• a bit deinterleaver and a decoder for processing said received CDMA signal;
• and
• said receiver includes a demapper connected in series with the bit deinterleaver and decoder;
• wherein said receiver performs iterative demapping by passing back the output of the decoder to the demapper.

A method of transmitting a CDMA signal comprising the steps of:

• generating a CDMA signal to be transmitted;
• encoding and bit interleaving said CDMA signal;
• and
• transmitting said encoded and interleaved CDMA signal, wherein
• the encoded and interleaved CDMA signal is mapped before being transmitted;
• and
• wherein the transmitted signal is configured for processing in a receiver having a demapper connected in series with a bit deinterleaver and a decoder, the receiver performing iterative demapping by passing back the output of the decoder to the demapper.