Performance of serially concatenated space-time QPSK systems

Altunbas I., YONGACOGLU A.

8th IEEE International Symposium on Computers and Communication (ISCC 2003), Antalya, Turkey, 30 June - 03 July 2003, pp.271-276 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/iscc.2003.1214133
  • City: Antalya
  • Country: Turkey
  • Page Numbers: pp.271-276
  • Istanbul Technical University Affiliated: Yes


In this paper, error performance of a serially concatenated QPSK space-time system is investigated on quasi-static, block and rapid fading channels. We consider outer nonrecursive convolutional and inner recursive space-time trellis code case and iterative decoding based on the maximum a posteriori (MAP) algorithm. The performance is evaluated by means of computer simulations and it is observed that when the recursive versions of some of the previously known space-time trellis codes are used as the inner codes, the Euclidean distance criterion based space-time codes lead to better error performance for both quasi-static and rapid fading channels. We also investigate the effects of various system parameters on the performance. We obtain the error performance for the large number of transmit and/or receive antennas and observe that, generally, as the number of antennas increases the error performance improves.