Abstract / Description of output
This paper presents a method to significantly reduce the preprocessing complexity of the sphere decoder (SD) in frequency-selective channels. The method consists of calculating an approximate QR Decomposition (AQRD) of the channel matrix, making use of its special Toeptliz and block-Topelitz structure in single and multiple-antenna frequency-selective channels, respectively. The AQRD obtains the QR decomposition of a small submatrix of the channel matrix and extends that result to the rest of the matrix, resulting in a considerable complexity reduction compared to the original full QR Decomposition (FQRD). Simulation results show that, despite the lower complexity of the AQRD, it causes only a small bit error rate (BER) performance degradation in the SD.
Original language | English |
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Title of host publication | IEEE International Conference on Communications |
DOIs | |
Publication status | Published - 13 Aug 2010 |
Event | 2010 IEEE International Conference on Communications, ICC 2010 - Cape Town, United Kingdom Duration: 23 May 2010 → 27 May 2010 |
Conference
Conference | 2010 IEEE International Conference on Communications, ICC 2010 |
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Country/Territory | United Kingdom |
City | Cape Town |
Period | 23/05/10 → 27/05/10 |
Keywords / Materials (for Non-textual outputs)
- Approximate QR decomposition
- Frequency-selective MIMO channel
- Sphere decoder