A STBC interference cancellation site diversity technique for a PB/MC-CDMA downlink

作者：Li Changping^*; Lee Kyujin; Cho Juphil; Lee Kyesan

来源：IETE Journal of Research, 2013, 59(4): 319-325.

DOI：10.4103/0377-2063.118013

• Interference cancellation
• Partial block multicarrier-code division multiple access system
• Site diversity
• Space-time block coding

It has been proved that site diversity is an effective technique to improve the bit error rate (BER) performance for users located at the cell edge. In this paper, the downlink site diversity is applied to a partial block multicarrier-CDMA (PB/MC-CDMA) system, which is a newly proposed and more flexible system compared to the well-known multicarrier CDMA (MC-CDMA) system. We propose a space-time block coding with interference cancellation (STBC-IC) site diversity scheme, where the STBC is adopted on the site diversity participant base stations. A joint code assignment enables the mobile users to get full diversity and reduce inter-cell interference, whereas IC eliminates the intra-cell interference from the users that use the same partial block as the desired user. The BER performances using site diversity, STBC site diversity, and the proposed STBC-IC site diversity in PB system are evaluated by computer simulations. The results show that the site diversity technique works well in the PB system for users close to the cell edge. With the proposed STBC-IC site diversity scheme, we can expect satisfying BER and throughput results.

• 出版日期2013-8