Back to Search
Start Over
Blind SOS subspace channel estimation and equalization techniques exploiting spatial diversity in OFDM systems
- Source :
-
Digital Signal Processing . Mar2004, Vol. 14 Issue 2, p171. 32p. - Publication Year :
- 2004
-
Abstract
- In this paper, we present second-order-statistics (SOS) subspace-based blind channel estimation techniques, which exploit the receive antenna diversity in each of the following situations: cyclic prefix-OFDM (CP-OFDM), zero padded-OFDM (ZP-OFDM), and bandwidth efficient-OFDM (BWE-OFDM) systems. We also propose a number of combinations of pre-FFT equalizer, post-FFT equalizer, zero-forcing (ZF) equalizer, and minimum-mean-square-error (MMSE) equalizer. For any number of receive antennas, the pre-FFT equalizers require only one FFT at the receiver. As a result, a considerable reduction in hardware complexity and power saving may be obtained especially for systems with higher number of sub-carriers. In contrast, post-FFT equalizers result in considerable reduction in processing complexity at the cost of one FFT for each antenna. Adaptive linear-complexity implementations of the proposed receivers are considered, along with some modifications in the presence of null side carriers. The effectiveness of the new techniques is demonstrated through simulations. [Copyright &y& Elsevier]
- Subjects :
- *ANTENNAS (Electronics)
*ZERO (The number)
*MATHEMATICS
*EQUALIZERS (Electronics)
Subjects
Details
- Language :
- English
- ISSN :
- 10512004
- Volume :
- 14
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Digital Signal Processing
- Publication Type :
- Periodical
- Accession number :
- 12444380
- Full Text :
- https://doi.org/10.1016/S1051-2004(03)00008-3