Abstract
In this work, we propose an iterative algorithm for the detection of transmitted symbols at the uplink of an orthogonal frequency-division multiple access (OFDMA) system. The algorithm allows distinct frequency-offsets (FO)s from each user that cause self- and multiple-access-interference. The proposed algorithm squeezes the interference of subcarrier k into 2D +1 nearby subcarriers by preprocessing the received signal, which yields a banded structure interference matrix. This banded structure is exploited to realize a low complexity iterative softinterference- cancellation minimum mean-squared error (SICMMSE) equalizer that can be used in Turbo equalization. Simulation results show that the bit-error-rate (BER) performance of the proposed algorithm outperforms existing detection algorithms and is very much close to the zero-FO frequencydomain-equalization (zero-FO-FDE) at low computational cost.
Original language | English (US) |
---|---|
Title of host publication | 2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Proceedings |
DOIs | |
State | Published - 2009 |
Externally published | Yes |
Event | 2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 - Budapest, Hungary Duration: Apr 5 2009 → Apr 8 2009 |
Other
Other | 2009 IEEE Wireless Communications and Networking Conference, WCNC 2009 |
---|---|
Country/Territory | Hungary |
City | Budapest |
Period | 04/5/09 → 04/8/09 |
Keywords
- Iterative MMSE equalizer
- OFDMA
ASJC Scopus subject areas
- Engineering(all)