A CDMA radio link with 'turbo-decoding': concept and performance evaluation

This paper focuses on a CDMA radio link with a 'turbo-decoding' (TD) scheme. The radio link concept is based on the requirements for third generation mobile radio communications. The performance of the CDMA link is evaluated for ATM service scenarios with 32 kbit/s low-delay speech and 64 kbit/s data transmission. For this reason, Monte-Carlo simulations based on measured mobile radio impulse responses are performed. As a reference to which TD can be compared, a one-dimensional convolutional code with soft-decision Viterbi decoding (VD) is alternatively used. The simulation results show that a single coding scheme with TD may be advantageously applied for data as well as for low-delay speech services.