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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ahmed, Rana Loghin, Nabil Sven Speidel, Joachim |
| Copyright Year | 2014 |
| Abstract | Channel variation causes a loss of orthogonality among the subcarriers of an Orthogonal Frequency Division Multiplexing (OFDM) symbol and leads to inter- carrier interference (ICI) and degradation in performance. In this work, we propose a minimum mean square error ICI canceller with an adaptive sliding window (MMSE-ASW). In a frequency selective channel, the proposed MMSE-ASW adopts a different window size depending on the degree of ICI to which each subcarrier is subjected relative to the power of the signal part. A metric is computed for each subcarrier to determine the degree of interference which depends on the estimated ICI coefficients. A closed form is derived to get the optimum value of the window size used in the MMSE-ASW approach. We analyze the performance and the complexity trade-off of the algorithm. We demonstrate the effectiveness of the proposed method for a frequency selective fast fading channel, in a first generation digital video broadcasting system (DVB-T). As a result, we found that at a Doppler frequency of 100Hz, the proposed algorithm requires only about 32% of the complexity needed in the conventional MMSE approach to deliver the same bit error rate (BER) performance. |
| Starting Page | 1 |
| Ending Page | 5 |
| File Size | 1430696 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781479944828 |
| DOI | 10.1109/VTCSpring.2014.7022811 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-05-18 |
| Publisher Place | South Korea |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | OFDM Complexity theory Doppler effect Interference Bit error rate Receivers Equalizers |
| Content Type | Text |
| Resource Type | Article |
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